Add an SPMI regulator driver for Qualcomm's PM8941 and PM8916 PMICs. This driver is based largely on code from codeaurora.org[1]. [1] https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.10/tree/drivers/regulator/qpnp-regulator.c?h=msm-3.10 Cc: David Collins <collinsd@xxxxxxxxxxxxxx> Cc: <devicetree@xxxxxxxxxxxxxxx> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx> --- .../bindings/regulator/qcom,spmi-regulator.txt | 225 +++ drivers/regulator/Kconfig | 11 + drivers/regulator/Makefile | 1 + drivers/regulator/qcom_spmi-regulator.c | 1750 ++++++++++++++++++++ 4 files changed, 1987 insertions(+) create mode 100644 Documentation/devicetree/bindings/regulator/qcom,spmi-regulator.txt create mode 100644 drivers/regulator/qcom_spmi-regulator.c diff --git a/Documentation/devicetree/bindings/regulator/qcom,spmi-regulator.txt b/Documentation/devicetree/bindings/regulator/qcom,spmi-regulator.txt new file mode 100644 index 000000000000..b89744da62d0 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/qcom,spmi-regulator.txt @@ -0,0 +1,225 @@ +Qualcomm SPMI Regulators + +- compatible: + Usage: required + Value type: <string> + Definition: must be one of: + "qcom,pm8841-regulators" + "qcom,pm8916-regulators" + "qcom,pm8941-regulators" + +- interrupts: + Usage: optional + Value type: <prop-encoded-array> + Definition: List of OCP interrupts. + +- interrupt-names: + Usage: required if 'interrupts' property present + Value type: <string-array> + Definition: List of strings defining the names of the + interrupts in the 'interrupts' property 1-to-1. + Supported values are "ocp-<regulator_name>", where + <regulator_name> corresponds to a voltage switch + type regulator. + +- vdd_s1-supply: +- vdd_s2-supply: +- vdd_s3-supply: +- vdd_s4-supply: +- vdd_s5-supply: +- vdd_s6-supply: +- vdd_s7-supply: +- vdd_s8-supply: + Usage: optional (pm8841 only) + Value type: <phandle> + Definition: Reference to regulator supplying the input pin, as + described in the data sheet. + +- vdd_s1-supply: +- vdd_s2-supply: +- vdd_s3-supply: +- vdd_s4-supply: +- vdd_l1_l3-supply: +- vdd_l2-supply: +- vdd_l4_l5_l6-supply: +- vdd_l7-supply: +- vdd_l8_l11_l14_l15_l16-supply: +- vdd_l9_l10_l12_l13_l17_l18-supply: + Usage: optional (pm8916 only) + Value type: <phandle> + Definition: Reference to regulator supplying the input pin, as + described in the data sheet. + +- vdd_s1-supply: +- vdd_s2-supply: +- vdd_s3-supply: +- vdd_l1_l3-supply: +- vdd_l2_lvs_1_2_3-supply: +- vdd_l4_l11-supply: +- vdd_l5_l7-supply: +- vdd_l6_l12_l14_l15-supply: +- vdd_l8_l16_l18_19-supply: +- vdd_l9_l10_l17_l22-supply: +- vdd_l13_l20_l23_l24-supply: +- vdd_l21-supply: +- vin_5vs-supply: + Usage: optional (pm8941 only) + Value type: <phandle> + Definition: Reference to regulator supplying the input pin, as + described in the data sheet. + + +The regulator node houses sub-nodes for each regulator within the device. Each +sub-node is identified using the node's name, with valid values listed for each +of the PMICs below. + +pm8841: + s1, s2, s3, s4, s5, s6, s7, s8 + +pm8916: + s1, s2, s3, s4, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11, l12, l13, + l14, l15, l16, l17, l18 + +pm8941: + s1, s2, s3, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11, l12, l13, l14, + l15, l16, l17, l18, l19, l20, l21, l22, l23, l24, lvs1, lvs2, lvs3, + mvs1, mvs2 + +The content of each sub-node is defined by the standard binding for regulators - +see regulator.txt - with additional custom properties described below: + +- qcom,system-load: + Usage: optional + Value type: <u32> + Description: Load in uA present on regulator that is not captured by + any consumer request. + +- qcom,auto-mode-enable: + Usage: optional + Value type: <u32> + Description: 1 = Enable automatic hardware selection of regulator + mode (HPM vs LPM); not available on boost type + regulators. 0 = Disable auto mode selection. + +- qcom,bypass-mode-enable: + Usage: optional + Value type: <u32> + Description: 1 = Enable bypass mode for an LDO type regulator so that + it acts like a switch and simply outputs its input + voltage. 0 = Do not enable bypass mode. + +- qcom,ocp-enable: + Usage: optional + Value type: <u32> + Description: 1 = Allow over current protection (OCP) to be enabled for + voltage switch type regulators so that they latch off + automatically when over current is detected. OCP is + enabled when in HPM or auto mode. 0 = Disable OCP. + +- qcom,ocp-max-retries: + Usage: optional + Value type: <u32> + Description: Maximum number of times to try toggling a voltage switch + off and back on as a result of consecutive over current + events. + +- qcom,ocp-retry-delay: + Usage: optional + Value type: <u32> + Description: Time to delay in milliseconds between each voltage switch + toggle after an over current event takes place. + +- qcom,pull-down-enable: + Usage: optional + Value type: <u32> + Description: 1 = Enable output pull down resistor when the regulator + is disabled. 0 = Disable pull down resistor + +- qcom,soft-start-enable: + Usage: optional + Value type: <u32> + Description: 1 = Enable soft start for LDO and voltage switch type + regulators so that output voltage slowly ramps up when the + regulator is enabled. 0 = Disable soft start + +- qcom,boost-current-limit: + Usage: optional + Value type: <u32> + Description: This property sets the current limit of boost type + regulators; supported values are: + 0 = 300 mA + 1 = 600 mA + 2 = 900 mA + 3 = 1200 mA + 4 = 1500 mA + 5 = 1800 mA + 6 = 2100 mA + 7 = 2400 mA + +- qcom,pin-ctrl-enable: + Usage: optional + Value type: <u32> + Description: Bit mask specifying which hardware pins should be used to + enable the regulator, if any; supported bits are: + 0 = ignore all hardware enable signals + BIT(0) = follow HW0_EN signal + BIT(1) = follow HW1_EN signal + BIT(2) = follow HW2_EN signal + BIT(3) = follow HW3_EN signal + +- qcom,pin-ctrl-hpm: + Usage: optional + Value type: <u32> + Description: Bit mask specifying which hardware pins should be used to + force the regulator into high power mode, if any; + supported bits are: + 0 = ignore all hardware enable signals + BIT(0) = follow HW0_EN signal + BIT(1) = follow HW1_EN signal + BIT(2) = follow HW2_EN signal + BIT(3) = follow HW3_EN signal + BIT(4) = follow PMIC awake state + +- qcom,vs-soft-start-strength: + Usage: optional + Value type: <u32> + Description: This property sets the soft start strength for voltage + switch type regulators; supported values are: + 0 = 0.05 uA + 1 = 0.25 uA + 2 = 0.55 uA + 3 = 0.75 uA + +- qcom,hpm-enable: + Usage: optional + Value type: <u32> + Description: 1 = Enable high power mode (HPM), also referred + to as NPM. HPM consumes more ground current than LPM, but + it can source significantly higher load current. HPM is + not available on boost type regulators. For voltage + switch type regulators, HPM implies that over current + protection and soft start are active all the time. This + configuration can be overwritten by changing the + regulator's mode dynamically. 0 = Do not enable HPM. + +Example: + + regulators { + compatible = "qcom,pm8941-regulators"; + vdd_l1_l3-supply = <&s1>; + + s1: s1 { + regulator-min-microvolt = <1300000>; + regulator-max-microvolt = <1400000>; + }; + + ... + + l1: l1 { + regulator-min-microvolt = <1225000>; + regulator-max-microvolt = <1300000>; + qcom,pull-down-enable = <1>; + }; + + .... + }; diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index a6f116aa5235..53b3e25a98a1 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -512,6 +512,17 @@ config REGULATOR_QCOM_RPM Qualcomm RPM as a module. The module will be named "qcom_rpm-regulator". +config REGULATOR_QCOM_SPMI + tristate "Qualcomm SPMI regulator driver" + depends on SPMI || COMPILE_TEST + help + If you say yes to this option, support will be included for the + regulators found in Qualcomm SPMI PMICs. + + Say M here if you want to include support for the regulators on the + Qualcomm SPMI PMICs as a module. The module will be named + "qcom_spmi-regulator". + config REGULATOR_RC5T583 tristate "RICOH RC5T583 Power regulators" depends on MFD_RC5T583 diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 2c4da15e1545..7152c979c935 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o +obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o obj-$(CONFIG_REGULATOR_PWM) += pwm-regulator.o diff --git a/drivers/regulator/qcom_spmi-regulator.c b/drivers/regulator/qcom_spmi-regulator.c new file mode 100644 index 000000000000..f80d6fd940ff --- /dev/null +++ b/drivers/regulator/qcom_spmi-regulator.c @@ -0,0 +1,1750 @@ +/* + * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/bitops.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/ktime.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/of_regulator.h> +#include <linux/regmap.h> +#include <linux/list.h> + +/* Pin control enable input pins. */ +#define SPMI_REGULATOR_PIN_CTRL_ENABLE_NONE 0x00 +#define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN0 0x01 +#define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN1 0x02 +#define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN2 0x04 +#define SPMI_REGULATOR_PIN_CTRL_ENABLE_EN3 0x08 +#define SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT 0x10 + +/* Pin control high power mode input pins. */ +#define SPMI_REGULATOR_PIN_CTRL_HPM_NONE 0x00 +#define SPMI_REGULATOR_PIN_CTRL_HPM_EN0 0x01 +#define SPMI_REGULATOR_PIN_CTRL_HPM_EN1 0x02 +#define SPMI_REGULATOR_PIN_CTRL_HPM_EN2 0x04 +#define SPMI_REGULATOR_PIN_CTRL_HPM_EN3 0x08 +#define SPMI_REGULATOR_PIN_CTRL_HPM_SLEEP_B 0x10 +#define SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT 0x20 + +/* + * Used with enable parameters to specify that hardware default register values + * should be left unaltered. + */ +#define SPMI_REGULATOR_DISABLE 0 +#define SPMI_REGULATOR_ENABLE 1 +#define SPMI_REGULATOR_USE_HW_DEFAULT 2 + +/* Soft start strength of a voltage switch type regulator */ +enum spmi_vs_soft_start_str { + SPMI_VS_SOFT_START_STR_0P05_UA = 0, + SPMI_VS_SOFT_START_STR_0P25_UA, + SPMI_VS_SOFT_START_STR_0P55_UA, + SPMI_VS_SOFT_START_STR_0P75_UA, + SPMI_VS_SOFT_START_STR_HW_DEFAULT, +}; + +/* Current limit of a boost type regulator */ +enum spmi_boost_current_limit { + SPMI_BOOST_CURRENT_LIMIT_300_MA = 0, + SPMI_BOOST_CURRENT_LIMIT_600_MA, + SPMI_BOOST_CURRENT_LIMIT_900_MA, + SPMI_BOOST_CURRENT_LIMIT_1200_MA, + SPMI_BOOST_CURRENT_LIMIT_1500_MA, + SPMI_BOOST_CURRENT_LIMIT_1800_MA, + SPMI_BOOST_CURRENT_LIMIT_2100_MA, + SPMI_BOOST_CURRENT_LIMIT_2400_MA, + SPMI_BOOST_CURRENT_LIMIT_HW_DEFAULT, +}; + +/** + * struct spmi_regulator_init_data - spmi-regulator initialization data + * @pull_down_enable: 1 = Enable output pull down resistor when the + * regulator is disabled + * 0 = Disable pull down resistor + * SPMI_REGULATOR_USE_HW_DEFAULT = do not modify + * pull down state + * @pin_ctrl_enable: Bit mask specifying which hardware pins should be + * used to enable the regulator, if any + * Value should be an ORing of + * SPMI_REGULATOR_PIN_CTRL_ENABLE_* constants. If + * the bit specified by + * SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT is + * set, then pin control enable hardware registers + * will not be modified. + * @pin_ctrl_hpm: Bit mask specifying which hardware pins should be + * used to force the regulator into high power + * mode, if any + * Value should be an ORing of + * SPMI_REGULATOR_PIN_CTRL_HPM_* constants. If + * the bit specified by + * SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT is + * set, then pin control mode hardware registers + * will not be modified. + * @system_load: Load in uA present on regulator that is not captured + * by any consumer request + * @boost_current_limit: This parameter sets the current limit of boost type + * regulators. Its value should be one of + * SPMI_BOOST_CURRENT_LIMIT_*. If its value is + * SPMI_BOOST_CURRENT_LIMIT_HW_DEFAULT, then the + * boost current limit will be left at its default + * hardware value. + * @soft_start_enable: 1 = Enable soft start for LDO and voltage switch + * type regulators so that output voltage slowly + * ramps up when the regulator is enabled + * 0 = Disable soft start + * SPMI_REGULATOR_USE_HW_DEFAULT = do not modify + * soft start state + * @vs_soft_start_strength: This parameter sets the soft start strength for + * voltage switch type regulators. Its value + * should be one of SPMI_VS_SOFT_START_STR_*. If + * its value is SPMI_VS_SOFT_START_STR_HW_DEFAULT, + * then the soft start strength will be left at its + * default hardware value. + * @auto_mode_enable: 1 = Enable automatic hardware selection of regulator + * mode (HPM vs LPM). Auto mode is not available + * on boost type regulators + * 0 = Disable auto mode selection + * SPMI_REGULATOR_USE_HW_DEFAULT = do not modify + * auto mode state + * @bypass_mode_enable: 1 = Enable bypass mode for an LDO type regulator so + * that it acts like a switch and simply outputs + * its input voltage + * 0 = Do not enable bypass mode + * SPMI_REGULATOR_USE_HW_DEFAULT = do not modify + * bypass mode state + * @hpm_enable: 1 = Enable high power mode (HPM), also referred to + * as NPM. HPM consumes more ground current than + * LPM, but it can source significantly higher load + * current. HPM is not available on boost type + * regulators. For voltage switch type regulators, + * HPM implies that over current protection and + * soft start are active all the time. This + * configuration can be overwritten by changing the + * regulator's mode dynamically. + * 0 = Do not enable HPM + * SPMI_REGULATOR_USE_HW_DEFAULT = do not modify + * HPM state + */ +struct spmi_regulator_init_data { + int pull_down_enable; + unsigned pin_ctrl_enable; + unsigned pin_ctrl_hpm; + int system_load; + enum spmi_boost_current_limit boost_current_limit; + int soft_start_enable; + enum spmi_vs_soft_start_str vs_soft_start_strength; + int auto_mode_enable; + int bypass_mode_enable; + int hpm_enable; +}; + +/* These types correspond to unique register layouts. */ +enum spmi_regulator_logical_type { + SPMI_REGULATOR_LOGICAL_TYPE_SMPS, + SPMI_REGULATOR_LOGICAL_TYPE_LDO, + SPMI_REGULATOR_LOGICAL_TYPE_VS, + SPMI_REGULATOR_LOGICAL_TYPE_BOOST, + SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS, + SPMI_REGULATOR_LOGICAL_TYPE_BOOST_BYP, + SPMI_REGULATOR_LOGICAL_TYPE_LN_LDO, + SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS, + SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS, + SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO, +}; + +enum spmi_regulator_type { + SPMI_REGULATOR_TYPE_BUCK = 0x03, + SPMI_REGULATOR_TYPE_LDO = 0x04, + SPMI_REGULATOR_TYPE_VS = 0x05, + SPMI_REGULATOR_TYPE_BOOST = 0x1b, + SPMI_REGULATOR_TYPE_FTS = 0x1c, + SPMI_REGULATOR_TYPE_BOOST_BYP = 0x1f, + SPMI_REGULATOR_TYPE_ULT_LDO = 0x21, + SPMI_REGULATOR_TYPE_ULT_BUCK = 0x22, +}; + +enum spmi_regulator_subtype { + SPMI_REGULATOR_SUBTYPE_GP_CTL = 0x08, + SPMI_REGULATOR_SUBTYPE_RF_CTL = 0x09, + SPMI_REGULATOR_SUBTYPE_N50 = 0x01, + SPMI_REGULATOR_SUBTYPE_N150 = 0x02, + SPMI_REGULATOR_SUBTYPE_N300 = 0x03, + SPMI_REGULATOR_SUBTYPE_N600 = 0x04, + SPMI_REGULATOR_SUBTYPE_N1200 = 0x05, + SPMI_REGULATOR_SUBTYPE_N600_ST = 0x06, + SPMI_REGULATOR_SUBTYPE_N1200_ST = 0x07, + SPMI_REGULATOR_SUBTYPE_N300_ST = 0x15, + SPMI_REGULATOR_SUBTYPE_P50 = 0x08, + SPMI_REGULATOR_SUBTYPE_P150 = 0x09, + SPMI_REGULATOR_SUBTYPE_P300 = 0x0a, + SPMI_REGULATOR_SUBTYPE_P600 = 0x0b, + SPMI_REGULATOR_SUBTYPE_P1200 = 0x0c, + SPMI_REGULATOR_SUBTYPE_LN = 0x10, + SPMI_REGULATOR_SUBTYPE_LV_P50 = 0x28, + SPMI_REGULATOR_SUBTYPE_LV_P150 = 0x29, + SPMI_REGULATOR_SUBTYPE_LV_P300 = 0x2a, + SPMI_REGULATOR_SUBTYPE_LV_P600 = 0x2b, + SPMI_REGULATOR_SUBTYPE_LV_P1200 = 0x2c, + SPMI_REGULATOR_SUBTYPE_LV100 = 0x01, + SPMI_REGULATOR_SUBTYPE_LV300 = 0x02, + SPMI_REGULATOR_SUBTYPE_MV300 = 0x08, + SPMI_REGULATOR_SUBTYPE_MV500 = 0x09, + SPMI_REGULATOR_SUBTYPE_HDMI = 0x10, + SPMI_REGULATOR_SUBTYPE_OTG = 0x11, + SPMI_REGULATOR_SUBTYPE_5V_BOOST = 0x01, + SPMI_REGULATOR_SUBTYPE_FTS_CTL = 0x08, + SPMI_REGULATOR_SUBTYPE_FTS2p5_CTL = 0x09, + SPMI_REGULATOR_SUBTYPE_BB_2A = 0x01, + SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL1 = 0x0d, + SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL2 = 0x0e, + SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL3 = 0x0f, + SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL4 = 0x10, +}; + +enum spmi_common_regulator_registers { + SPMI_COMMON_REG_DIG_MAJOR_REV = 0x01, + SPMI_COMMON_REG_TYPE = 0x04, + SPMI_COMMON_REG_SUBTYPE = 0x05, + SPMI_COMMON_REG_VOLTAGE_RANGE = 0x40, + SPMI_COMMON_REG_VOLTAGE_SET = 0x41, + SPMI_COMMON_REG_MODE = 0x45, + SPMI_COMMON_REG_ENABLE = 0x46, + SPMI_COMMON_REG_PULL_DOWN = 0x48, + SPMI_COMMON_REG_STEP_CTRL = 0x61, +}; + +enum spmi_ldo_registers { + SPMI_LDO_REG_SOFT_START = 0x4c, +}; + +enum spmi_vs_registers { + SPMI_VS_REG_OCP = 0x4a, + SPMI_VS_REG_SOFT_START = 0x4c, +}; + +enum spmi_boost_registers { + SPMI_BOOST_REG_CURRENT_LIMIT = 0x4a, +}; + +enum spmi_boost_byp_registers { + SPMI_BOOST_BYP_REG_CURRENT_LIMIT = 0x4b, +}; + +/* Used for indexing into ctrl_reg. These are offets from 0x40 */ +enum spmi_common_control_register_index { + SPMI_COMMON_IDX_VOLTAGE_RANGE = 0, + SPMI_COMMON_IDX_VOLTAGE_SET = 1, + SPMI_COMMON_IDX_MODE = 5, + SPMI_COMMON_IDX_ENABLE = 6, +}; + +/* Common regulator control register layout */ +#define SPMI_COMMON_ENABLE_MASK 0x80 +#define SPMI_COMMON_ENABLE 0x80 +#define SPMI_COMMON_DISABLE 0x00 +#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN3_MASK 0x08 +#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN2_MASK 0x04 +#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN1_MASK 0x02 +#define SPMI_COMMON_ENABLE_FOLLOW_HW_EN0_MASK 0x01 +#define SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK 0x0f + +/* Common regulator mode register layout */ +#define SPMI_COMMON_MODE_HPM_MASK 0x80 +#define SPMI_COMMON_MODE_AUTO_MASK 0x40 +#define SPMI_COMMON_MODE_BYPASS_MASK 0x20 +#define SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK 0x10 +#define SPMI_COMMON_MODE_FOLLOW_HW_EN3_MASK 0x08 +#define SPMI_COMMON_MODE_FOLLOW_HW_EN2_MASK 0x04 +#define SPMI_COMMON_MODE_FOLLOW_HW_EN1_MASK 0x02 +#define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK 0x01 +#define SPMI_COMMON_MODE_FOLLOW_ALL_MASK 0x1f + +/* Common regulator pull down control register layout */ +#define SPMI_COMMON_PULL_DOWN_ENABLE_MASK 0x80 + +/* LDO regulator current limit control register layout */ +#define SPMI_LDO_CURRENT_LIMIT_ENABLE_MASK 0x80 + +/* LDO regulator soft start control register layout */ +#define SPMI_LDO_SOFT_START_ENABLE_MASK 0x80 + +/* VS regulator over current protection control register layout */ +#define SPMI_VS_OCP_OVERRIDE 0x01 +#define SPMI_VS_OCP_NO_OVERRIDE 0x00 + +/* VS regulator soft start control register layout */ +#define SPMI_VS_SOFT_START_ENABLE_MASK 0x80 +#define SPMI_VS_SOFT_START_SEL_MASK 0x03 + +/* Boost regulator current limit control register layout */ +#define SPMI_BOOST_CURRENT_LIMIT_ENABLE_MASK 0x80 +#define SPMI_BOOST_CURRENT_LIMIT_MASK 0x07 + +#define SPMI_VS_OCP_DEFAULT_MAX_RETRIES 10 +#define SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS 30 +#define SPMI_VS_OCP_FALL_DELAY_US 90 +#define SPMI_VS_OCP_FAULT_DELAY_US 20000 + +#define SPMI_FTSMPS_STEP_CTRL_STEP_MASK 0x18 +#define SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT 3 +#define SPMI_FTSMPS_STEP_CTRL_DELAY_MASK 0x07 +#define SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT 0 + +/* Clock rate in kHz of the FTSMPS regulator reference clock. */ +#define SPMI_FTSMPS_CLOCK_RATE 19200 + +/* Minimum voltage stepper delay for each step. */ +#define SPMI_FTSMPS_STEP_DELAY 8 + +/* + * The ratio SPMI_FTSMPS_STEP_MARGIN_NUM/SPMI_FTSMPS_STEP_MARGIN_DEN is used to + * adjust the step rate in order to account for oscillator variance. + */ +#define SPMI_FTSMPS_STEP_MARGIN_NUM 4 +#define SPMI_FTSMPS_STEP_MARGIN_DEN 5 + +/* + * This voltage in uV is returned by get_voltage functions when there is no way + * to determine the current voltage level. It is needed because the regulator + * framework treats a 0 uV voltage as an error. + */ +#define VOLTAGE_UNKNOWN 1 + +/* VSET value to decide the range of ULT SMPS */ +#define ULT_SMPS_RANGE_SPLIT 0x60 + +/** + * struct spmi_voltage_range - regulator set point voltage mapping description + * @min_uV: Minimum programmable output voltage resulting from + * set point register value 0x00 + * @max_uV: Maximum programmable output voltage + * @step_uV: Output voltage increase resulting from the set point + * register value increasing by 1 + * @set_point_min_uV: Minimum allowed voltage + * @set_point_max_uV: Maximum allowed voltage. This may be tweaked in order + * to pick which range should be used in the case of + * overlapping set points. + * @n_voltages: Number of preferred voltage set points present in this + * range + * @range_sel: Voltage range register value corresponding to this range + * + * The following relationships must be true for the values used in this struct: + * (max_uV - min_uV) % step_uV == 0 + * (set_point_min_uV - min_uV) % step_uV == 0* + * (set_point_max_uV - min_uV) % step_uV == 0* + * n_voltages = (set_point_max_uV - set_point_min_uV) / step_uV + 1 + * + * *Note, set_point_min_uV == set_point_max_uV == 0 is allowed in order to + * specify that the voltage range has meaning, but is not preferred. + */ +struct spmi_voltage_range { + int min_uV; + int max_uV; + int step_uV; + int set_point_min_uV; + int set_point_max_uV; + unsigned n_voltages; + u8 range_sel; +}; + +/* + * The ranges specified in the spmi_voltage_set_points struct must be listed + * so that range[i].set_point_max_uV < range[i+1].set_point_min_uV. + */ +struct spmi_voltage_set_points { + struct spmi_voltage_range *range; + int count; + unsigned n_voltages; +}; + +struct spmi_regulator { + struct regulator_desc desc; + struct device *dev; + struct delayed_work ocp_work; + struct regmap *regmap; + struct spmi_voltage_set_points *set_points; + enum spmi_regulator_logical_type logical_type; + int ocp_enable; + int ocp_irq; + int ocp_count; + int ocp_max_retries; + int ocp_retry_delay_ms; + int system_load; + int hpm_min_load; + int slew_rate; + ktime_t vs_enable_time; + u16 base; + struct list_head node; +}; + +struct spmi_regulator_mapping { + enum spmi_regulator_type type; + enum spmi_regulator_subtype subtype; + enum spmi_regulator_logical_type logical_type; + u32 revision_min; + u32 revision_max; + struct regulator_ops *ops; + struct spmi_voltage_set_points *set_points; + int hpm_min_load; +}; + +struct spmi_regulator_data { + const char *name; + u16 base; + const char *supply; + const char *ocp; + u16 force_type; +}; + +#define VREG_MAP(_type, _subtype, _dig_major_min, _dig_major_max, \ + _logical_type, _ops_val, _set_points_val, _hpm_min_load) \ + { \ + .type = SPMI_REGULATOR_TYPE_##_type, \ + .subtype = SPMI_REGULATOR_SUBTYPE_##_subtype, \ + .revision_min = _dig_major_min, \ + .revision_max = _dig_major_max, \ + .logical_type = SPMI_REGULATOR_LOGICAL_TYPE_##_logical_type, \ + .ops = &spmi_##_ops_val##_ops, \ + .set_points = &_set_points_val##_set_points, \ + .hpm_min_load = _hpm_min_load, \ + } + +#define VREG_MAP_VS(_subtype, _dig_major_min, _dig_major_max) \ + { \ + .type = SPMI_REGULATOR_TYPE_VS, \ + .subtype = SPMI_REGULATOR_SUBTYPE_##_subtype, \ + .revision_min = _dig_major_min, \ + .revision_max = _dig_major_max, \ + .logical_type = SPMI_REGULATOR_LOGICAL_TYPE_VS, \ + .ops = &spmi_vs_ops, \ + } + +#define VOLTAGE_RANGE(_range_sel, _min_uV, _set_point_min_uV, \ + _set_point_max_uV, _max_uV, _step_uV) \ + { \ + .min_uV = _min_uV, \ + .max_uV = _max_uV, \ + .set_point_min_uV = _set_point_min_uV, \ + .set_point_max_uV = _set_point_max_uV, \ + .step_uV = _step_uV, \ + .range_sel = _range_sel, \ + } + +#define DEFINE_SET_POINTS(name) \ +struct spmi_voltage_set_points name##_set_points = { \ + .range = name##_ranges, \ + .count = ARRAY_SIZE(name##_ranges), \ +} + +/* + * These tables contain the physically available PMIC regulator voltage setpoint + * ranges. Where two ranges overlap in hardware, one of the ranges is trimmed + * to ensure that the setpoints available to software are monotonically + * increasing and unique. The set_voltage callback functions expect these + * properties to hold. + */ +static struct spmi_voltage_range pldo_ranges[] = { + VOLTAGE_RANGE(2, 750000, 750000, 1537500, 1537500, 12500), + VOLTAGE_RANGE(3, 1500000, 1550000, 3075000, 3075000, 25000), + VOLTAGE_RANGE(4, 1750000, 3100000, 4900000, 4900000, 50000), +}; + +static struct spmi_voltage_range nldo1_ranges[] = { + VOLTAGE_RANGE(2, 750000, 750000, 1537500, 1537500, 12500), +}; + +static struct spmi_voltage_range nldo2_ranges[] = { + VOLTAGE_RANGE(0, 375000, 0, 0, 1537500, 12500), + VOLTAGE_RANGE(1, 375000, 375000, 768750, 768750, 6250), + VOLTAGE_RANGE(2, 750000, 775000, 1537500, 1537500, 12500), +}; + +static struct spmi_voltage_range nldo3_ranges[] = { + VOLTAGE_RANGE(0, 375000, 375000, 1537500, 1537500, 12500), + VOLTAGE_RANGE(1, 375000, 0, 0, 1537500, 12500), + VOLTAGE_RANGE(2, 750000, 0, 0, 1537500, 12500), +}; + +static struct spmi_voltage_range ln_ldo_ranges[] = { + VOLTAGE_RANGE(1, 690000, 690000, 1110000, 1110000, 60000), + VOLTAGE_RANGE(0, 1380000, 1380000, 2220000, 2220000, 120000), +}; + +static struct spmi_voltage_range smps_ranges[] = { + VOLTAGE_RANGE(0, 375000, 375000, 1562500, 1562500, 12500), + VOLTAGE_RANGE(1, 1550000, 1575000, 3125000, 3125000, 25000), +}; + +static struct spmi_voltage_range ftsmps_ranges[] = { + VOLTAGE_RANGE(0, 0, 350000, 1275000, 1275000, 5000), + VOLTAGE_RANGE(1, 0, 1280000, 2040000, 2040000, 10000), +}; + +static struct spmi_voltage_range ftsmps2p5_ranges[] = { + VOLTAGE_RANGE(0, 80000, 350000, 1355000, 1355000, 5000), + VOLTAGE_RANGE(1, 160000, 1360000, 2200000, 2200000, 10000), +}; + +static struct spmi_voltage_range boost_ranges[] = { + VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000), +}; + +static struct spmi_voltage_range boost_byp_ranges[] = { + VOLTAGE_RANGE(0, 2500000, 2500000, 5200000, 5650000, 50000), +}; + +static struct spmi_voltage_range ult_lo_smps_ranges[] = { + VOLTAGE_RANGE(0, 375000, 375000, 1562500, 1562500, 12500), + VOLTAGE_RANGE(1, 750000, 0, 0, 1525000, 25000), +}; + +static struct spmi_voltage_range ult_ho_smps_ranges[] = { + VOLTAGE_RANGE(0, 1550000, 1550000, 2325000, 2325000, 25000), +}; + +static struct spmi_voltage_range ult_nldo_ranges[] = { + VOLTAGE_RANGE(0, 375000, 375000, 1537500, 1537500, 12500), +}; + +static struct spmi_voltage_range ult_pldo_ranges[] = { + VOLTAGE_RANGE(0, 1750000, 1750000, 3337500, 3337500, 12500), +}; + +static DEFINE_SET_POINTS(pldo); +static DEFINE_SET_POINTS(nldo1); +static DEFINE_SET_POINTS(nldo2); +static DEFINE_SET_POINTS(nldo3); +static DEFINE_SET_POINTS(ln_ldo); +static DEFINE_SET_POINTS(smps); +static DEFINE_SET_POINTS(ftsmps); +static DEFINE_SET_POINTS(ftsmps2p5); +static DEFINE_SET_POINTS(boost); +static DEFINE_SET_POINTS(boost_byp); +static DEFINE_SET_POINTS(ult_lo_smps); +static DEFINE_SET_POINTS(ult_ho_smps); +static DEFINE_SET_POINTS(ult_nldo); +static DEFINE_SET_POINTS(ult_pldo); + +static inline int spmi_vreg_read(struct spmi_regulator *vreg, u16 addr, u8 *buf, + int len) +{ + return regmap_bulk_read(vreg->regmap, vreg->base + addr, buf, len); +} + +static inline int spmi_vreg_write(struct spmi_regulator *vreg, u16 addr, + u8 *buf, int len) +{ + return regmap_bulk_write(vreg->regmap, vreg->base + addr, buf, len); +} + +static int spmi_vreg_update_bits(struct spmi_regulator *vreg, u16 addr, u8 val, + u8 mask) +{ + return regmap_update_bits(vreg->regmap, vreg->base + addr, mask, val); +} + +static int spmi_regulator_common_is_enabled(struct regulator_dev *rdev) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + u8 reg; + + reg = spmi_vreg_read(vreg, SPMI_COMMON_REG_ENABLE, ®, 1); + + return (reg & SPMI_COMMON_ENABLE_MASK) == SPMI_COMMON_ENABLE; +} + +static int spmi_regulator_common_enable(struct regulator_dev *rdev) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + + return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE, + SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK); +} + +static int spmi_regulator_vs_enable(struct regulator_dev *rdev) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + + if (vreg->ocp_irq) { + vreg->ocp_count = 0; + vreg->vs_enable_time = ktime_get(); + } + + return spmi_regulator_common_enable(rdev); +} + +static int spmi_regulator_common_disable(struct regulator_dev *rdev) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + + return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE, + SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK); +} + +static int spmi_regulator_select_voltage(struct spmi_regulator *vreg, + int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel, + unsigned *selector) +{ + struct spmi_voltage_range *range; + int uV = min_uV; + int lim_min_uV, lim_max_uV, i, range_id, range_max_uV; + + /* Check if request voltage is outside of physically settable range. */ + lim_min_uV = vreg->set_points->range[0].set_point_min_uV; + lim_max_uV = + vreg->set_points->range[vreg->set_points->count - 1].set_point_max_uV; + + if (uV < lim_min_uV && max_uV >= lim_min_uV) + uV = lim_min_uV; + + if (uV < lim_min_uV || uV > lim_max_uV) { + dev_err(vreg->dev, + "request v=[%d, %d] is outside possible v=[%d, %d]\n", + min_uV, max_uV, lim_min_uV, lim_max_uV); + return -EINVAL; + } + + /* Find the range which uV is inside of. */ + for (i = vreg->set_points->count - 1; i > 0; i--) { + range_max_uV = vreg->set_points->range[i - 1].set_point_max_uV; + if (uV > range_max_uV && range_max_uV > 0) + break; + } + + range_id = i; + range = &vreg->set_points->range[range_id]; + *range_sel = range->range_sel; + + /* + * Force uV to be an allowed set point by applying a ceiling function to + * the uV value. + */ + *voltage_sel = (uV - range->min_uV + range->step_uV - 1) + / range->step_uV; + uV = *voltage_sel * range->step_uV + range->min_uV; + + if (uV > max_uV) { + dev_err(vreg->dev, + "request v=[%d, %d] cannot be met by any set point; " + "next set point: %d\n", + min_uV, max_uV, uV); + return -EINVAL; + } + + *selector = 0; + for (i = 0; i < range_id; i++) + *selector += vreg->set_points->range[i].n_voltages; + *selector += (uV - range->set_point_min_uV) / range->step_uV; + + return 0; +} + +static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg, + int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel, + unsigned *selector) +{ + struct spmi_voltage_range *range = NULL; + int uV = min_uV; + int i; + u8 reg; + + spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, ®, 1); + *range_sel = reg; + + for (i = 0; i < vreg->set_points->count; i++) { + if (vreg->set_points->range[i].range_sel == *range_sel) { + range = &vreg->set_points->range[i]; + break; + } + } + + if (!range) { + /* Unknown range */ + goto different_range; + } + + if (uV < range->min_uV && max_uV >= range->min_uV) + uV = range->min_uV; + + if (uV < range->min_uV || uV > range->max_uV) { + /* Current range doesn't support the requested voltage. */ + goto different_range; + } + + /* + * Force uV to be an allowed set point by applying a ceiling function to + * the uV value. + */ + *voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV); + uV = *voltage_sel * range->step_uV + range->min_uV; + + if (uV > max_uV) { + /* + * No set point in the current voltage range is within the + * requested min_uV to max_uV range. + */ + goto different_range; + } + + *selector = 0; + for (i = 0; i < vreg->set_points->count; i++) { + if (uV >= vreg->set_points->range[i].set_point_min_uV + && uV <= vreg->set_points->range[i].set_point_max_uV) + *selector += + (uV - vreg->set_points->range[i].set_point_min_uV) + / vreg->set_points->range[i].step_uV; + break; + + *selector += vreg->set_points->range[i].n_voltages; + } + + if (*selector >= vreg->set_points->n_voltages) + goto different_range; + + return 0; + +different_range: + return spmi_regulator_select_voltage(vreg, min_uV, max_uV, + range_sel, voltage_sel, selector); +} + +static int spmi_regulator_common_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV, unsigned *selector) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + int ret, voltage_old, voltage_new; + u8 buf[2]; + u8 range_sel, voltage_sel; + + if (vreg->slew_rate && vreg->desc.ops->get_voltage) { + voltage_old = vreg->desc.ops->get_voltage(rdev); + if (voltage_old < 0) { + dev_err(vreg->dev, "could not get current voltage\n"); + return voltage_old; + } + } + + /* + * Favor staying in the current voltage range if possible. This avoids + * voltage spikes that occur when changing the voltage range. + */ + ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV, + &range_sel, &voltage_sel, selector); + if (ret) + return ret; + + buf[0] = range_sel; + buf[1] = voltage_sel; + ret = spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, + buf, 2); + if (ret) + return ret; + + /* Delay for voltage slewing if a step rate is specified. */ + if (vreg->slew_rate && vreg->desc.ops->get_voltage) { + voltage_new = vreg->desc.ops->get_voltage(rdev); + if (voltage_new < 0) { + dev_err(vreg->dev, "could not get new voltage\n"); + return voltage_new; + } + + udelay(DIV_ROUND_UP(abs(voltage_new - voltage_old), + vreg->slew_rate)); + } + + return 0; +} + +static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + struct spmi_voltage_range *range = NULL; + int i; + u8 range_sel, voltage_sel; + + spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1); + spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1); + + for (i = 0; i < vreg->set_points->count; i++) { + if (vreg->set_points->range[i].range_sel == range_sel) { + range = &vreg->set_points->range[i]; + break; + } + } + + if (!range) { + dev_err(vreg->dev, "voltage unknown, range %d is invalid\n", + range_sel); + return VOLTAGE_UNKNOWN; + } + + return range->step_uV * voltage_sel + range->min_uV; +} + +static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV, unsigned *selector) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + int ret; + u8 range_sel, sel; + + ret = spmi_regulator_select_voltage(vreg, min_uV, max_uV, &range_sel, + &sel, selector); + if (ret) { + dev_err(vreg->dev, "could not set voltage, ret=%d\n", ret); + return ret; + } + + /* + * Certain types of regulators do not have a range select register so + * only voltage set register needs to be written. + */ + return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &sel, 1); +} + +static int spmi_regulator_single_range_get_voltage(struct regulator_dev *rdev) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + struct spmi_voltage_range *range = &vreg->set_points->range[0]; + u8 voltage_sel; + + spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1); + + return range->step_uV * voltage_sel + range->min_uV; +} + +static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV, unsigned *selector) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + int ret; + u8 range_sel, voltage_sel; + + /* + * Favor staying in the current voltage range if possible. This avoids + * voltage spikes that occur when changing the voltage range. + */ + ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV, + &range_sel, &voltage_sel, selector); + if (ret) + return ret; + + /* + * Calculate VSET based on range + * In case of range 0: voltage_sel is a 7 bit value, can be written + * witout any modification. + * In case of range 1: voltage_sel is a 5 bit value, bits[7-5] set to + * [011]. + */ + if (range_sel == 1) + voltage_sel |= ULT_SMPS_RANGE_SPLIT; + + ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET, + voltage_sel, 0xff); + if (ret) + return ret; + + return 0; +} + +static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + struct spmi_voltage_range *range = NULL; + int i; + u8 range_sel, voltage_sel; + + spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1); + spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1); + + for (i = 0; i < vreg->set_points->count; i++) { + if (vreg->set_points->range[i].range_sel == range_sel) { + range = &vreg->set_points->range[i]; + break; + } + } + + if (!range) { + dev_err(vreg->dev, "voltage unknown, range %d is invalid\n", + range_sel); + return VOLTAGE_UNKNOWN; + } + + if (range_sel == 1) + voltage_sel &= ~ULT_SMPS_RANGE_SPLIT; + + return range->step_uV * voltage_sel + range->min_uV; +} + +static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev, + unsigned selector) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + int uV = 0; + int i; + + if (selector >= vreg->set_points->n_voltages) + return 0; + + for (i = 0; i < vreg->set_points->count; i++) { + if (selector < vreg->set_points->range[i].n_voltages) + uV = selector * vreg->set_points->range[i].step_uV + + vreg->set_points->range[i].set_point_min_uV; + break; + + selector -= vreg->set_points->range[i].n_voltages; + } + + return uV; +} + +static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + u8 reg; + + spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, ®, 1); + + if (reg & SPMI_COMMON_MODE_HPM_MASK) + return REGULATOR_MODE_NORMAL; + + return REGULATOR_MODE_IDLE; +} + +static int spmi_regulator_common_set_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + u8 val; + + val = (mode == REGULATOR_MODE_NORMAL ? SPMI_COMMON_MODE_HPM_MASK : 0); + + return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, + SPMI_COMMON_MODE_HPM_MASK); +} + +static unsigned int spmi_regulator_common_get_optimum_mode( + struct regulator_dev *rdev, int input_uV, int output_uV, + int load_uA) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + unsigned int mode; + + if (load_uA + vreg->system_load >= vreg->hpm_min_load) + mode = REGULATOR_MODE_NORMAL; + else + mode = REGULATOR_MODE_IDLE; + + return mode; +} + +static int spmi_regulator_vs_clear_ocp(struct spmi_regulator *vreg) +{ + int ret; + + ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE, + SPMI_COMMON_DISABLE, SPMI_COMMON_ENABLE_MASK); + + vreg->vs_enable_time = ktime_get(); + + ret = spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_ENABLE, + SPMI_COMMON_ENABLE, SPMI_COMMON_ENABLE_MASK); + + return ret; +} + +static void spmi_regulator_vs_ocp_work(struct work_struct *work) +{ + struct delayed_work *dwork = to_delayed_work(work); + struct spmi_regulator *vreg + = container_of(dwork, struct spmi_regulator, ocp_work); + + spmi_regulator_vs_clear_ocp(vreg); +} + +static irqreturn_t spmi_regulator_vs_ocp_isr(int irq, void *data) +{ + struct spmi_regulator *vreg = data; + ktime_t ocp_irq_time; + s64 ocp_trigger_delay_us; + + ocp_irq_time = ktime_get(); + ocp_trigger_delay_us = ktime_us_delta(ocp_irq_time, + vreg->vs_enable_time); + + /* + * Reset the OCP count if there is a large delay between switch enable + * and when OCP triggers. This is indicative of a hotplug event as + * opposed to a fault. + */ + if (ocp_trigger_delay_us > SPMI_VS_OCP_FAULT_DELAY_US) + vreg->ocp_count = 0; + + /* Wait for switch output to settle back to 0 V after OCP triggered. */ + udelay(SPMI_VS_OCP_FALL_DELAY_US); + + vreg->ocp_count++; + + if (vreg->ocp_count == 1) { + /* Immediately clear the over current condition. */ + spmi_regulator_vs_clear_ocp(vreg); + } else if (vreg->ocp_count <= vreg->ocp_max_retries) { + /* Schedule the over current clear task to run later. */ + schedule_delayed_work(&vreg->ocp_work, + msecs_to_jiffies(vreg->ocp_retry_delay_ms) + 1); + } else { + dev_err(vreg->dev, + "OCP triggered %d times; no further retries\n", + vreg->ocp_count); + } + + return IRQ_HANDLED; +} + +static struct regulator_ops spmi_smps_ops = { + .enable = spmi_regulator_common_enable, + .disable = spmi_regulator_common_disable, + .is_enabled = spmi_regulator_common_is_enabled, + .set_voltage = spmi_regulator_common_set_voltage, + .get_voltage = spmi_regulator_common_get_voltage, + .list_voltage = spmi_regulator_common_list_voltage, + .set_mode = spmi_regulator_common_set_mode, + .get_mode = spmi_regulator_common_get_mode, + .get_optimum_mode = spmi_regulator_common_get_optimum_mode, +}; + +static struct regulator_ops spmi_ldo_ops = { + .enable = spmi_regulator_common_enable, + .disable = spmi_regulator_common_disable, + .is_enabled = spmi_regulator_common_is_enabled, + .set_voltage = spmi_regulator_common_set_voltage, + .get_voltage = spmi_regulator_common_get_voltage, + .list_voltage = spmi_regulator_common_list_voltage, + .set_mode = spmi_regulator_common_set_mode, + .get_mode = spmi_regulator_common_get_mode, + .get_optimum_mode = spmi_regulator_common_get_optimum_mode, +}; + +static struct regulator_ops spmi_ln_ldo_ops = { + .enable = spmi_regulator_common_enable, + .disable = spmi_regulator_common_disable, + .is_enabled = spmi_regulator_common_is_enabled, + .set_voltage = spmi_regulator_common_set_voltage, + .get_voltage = spmi_regulator_common_get_voltage, + .list_voltage = spmi_regulator_common_list_voltage, +}; + +static struct regulator_ops spmi_vs_ops = { + .enable = spmi_regulator_vs_enable, + .disable = spmi_regulator_common_disable, + .is_enabled = spmi_regulator_common_is_enabled, +}; + +static struct regulator_ops spmi_boost_ops = { + .enable = spmi_regulator_common_enable, + .disable = spmi_regulator_common_disable, + .is_enabled = spmi_regulator_common_is_enabled, + .set_voltage = spmi_regulator_single_range_set_voltage, + .get_voltage = spmi_regulator_single_range_get_voltage, + .list_voltage = spmi_regulator_common_list_voltage, +}; + +static struct regulator_ops spmi_ftsmps_ops = { + .enable = spmi_regulator_common_enable, + .disable = spmi_regulator_common_disable, + .is_enabled = spmi_regulator_common_is_enabled, + .set_voltage = spmi_regulator_common_set_voltage, + .get_voltage = spmi_regulator_common_get_voltage, + .list_voltage = spmi_regulator_common_list_voltage, + .set_mode = spmi_regulator_common_set_mode, + .get_mode = spmi_regulator_common_get_mode, + .get_optimum_mode = spmi_regulator_common_get_optimum_mode, +}; + +static struct regulator_ops spmi_ult_lo_smps_ops = { + .enable = spmi_regulator_common_enable, + .disable = spmi_regulator_common_disable, + .is_enabled = spmi_regulator_common_is_enabled, + .set_voltage = spmi_regulator_ult_lo_smps_set_voltage, + .get_voltage = spmi_regulator_ult_lo_smps_get_voltage, + .list_voltage = spmi_regulator_common_list_voltage, + .set_mode = spmi_regulator_common_set_mode, + .get_mode = spmi_regulator_common_get_mode, + .get_optimum_mode = spmi_regulator_common_get_optimum_mode, +}; + +static struct regulator_ops spmi_ult_ho_smps_ops = { + .enable = spmi_regulator_common_enable, + .disable = spmi_regulator_common_disable, + .is_enabled = spmi_regulator_common_is_enabled, + .set_voltage = spmi_regulator_single_range_set_voltage, + .get_voltage = spmi_regulator_single_range_get_voltage, + .list_voltage = spmi_regulator_common_list_voltage, + .set_mode = spmi_regulator_common_set_mode, + .get_mode = spmi_regulator_common_get_mode, + .get_optimum_mode = spmi_regulator_common_get_optimum_mode, +}; + +static struct regulator_ops spmi_ult_ldo_ops = { + .enable = spmi_regulator_common_enable, + .disable = spmi_regulator_common_disable, + .is_enabled = spmi_regulator_common_is_enabled, + .set_voltage = spmi_regulator_single_range_set_voltage, + .get_voltage = spmi_regulator_single_range_get_voltage, + .list_voltage = spmi_regulator_common_list_voltage, + .set_mode = spmi_regulator_common_set_mode, + .get_mode = spmi_regulator_common_get_mode, + .get_optimum_mode = spmi_regulator_common_get_optimum_mode, +}; + +/* Maximum possible digital major revision value */ +#define INF 0xFF + +static const struct spmi_regulator_mapping supported_regulators[] = { + /* type subtype dig_min dig_max ltype ops setpoints hpm_min */ + VREG_MAP(BUCK, GP_CTL, 0, INF, SMPS, smps, smps, 100000), + VREG_MAP(LDO, N300, 0, INF, LDO, ldo, nldo1, 10000), + VREG_MAP(LDO, N600, 0, 0, LDO, ldo, nldo2, 10000), + VREG_MAP(LDO, N1200, 0, 0, LDO, ldo, nldo2, 10000), + VREG_MAP(LDO, N600, 1, INF, LDO, ldo, nldo3, 10000), + VREG_MAP(LDO, N1200, 1, INF, LDO, ldo, nldo3, 10000), + VREG_MAP(LDO, N600_ST, 0, 0, LDO, ldo, nldo2, 10000), + VREG_MAP(LDO, N1200_ST, 0, 0, LDO, ldo, nldo2, 10000), + VREG_MAP(LDO, N600_ST, 1, INF, LDO, ldo, nldo3, 10000), + VREG_MAP(LDO, N1200_ST, 1, INF, LDO, ldo, nldo3, 10000), + VREG_MAP(LDO, P50, 0, INF, LDO, ldo, pldo, 5000), + VREG_MAP(LDO, P150, 0, INF, LDO, ldo, pldo, 10000), + VREG_MAP(LDO, P300, 0, INF, LDO, ldo, pldo, 10000), + VREG_MAP(LDO, P600, 0, INF, LDO, ldo, pldo, 10000), + VREG_MAP(LDO, P1200, 0, INF, LDO, ldo, pldo, 10000), + VREG_MAP(LDO, LN, 0, INF, LN_LDO, ln_ldo, ln_ldo, 0), + VREG_MAP(LDO, LV_P50, 0, INF, LDO, ldo, pldo, 5000), + VREG_MAP(LDO, LV_P150, 0, INF, LDO, ldo, pldo, 10000), + VREG_MAP(LDO, LV_P300, 0, INF, LDO, ldo, pldo, 10000), + VREG_MAP(LDO, LV_P600, 0, INF, LDO, ldo, pldo, 10000), + VREG_MAP(LDO, LV_P1200, 0, INF, LDO, ldo, pldo, 10000), + VREG_MAP_VS(LV100, 0, INF), + VREG_MAP_VS(LV300, 0, INF), + VREG_MAP_VS(MV300, 0, INF), + VREG_MAP_VS(MV500, 0, INF), + VREG_MAP_VS(HDMI, 0, INF), + VREG_MAP_VS(OTG, 0, INF), + VREG_MAP(BOOST, 5V_BOOST, 0, INF, BOOST, boost, boost, 0), + VREG_MAP(FTS, FTS_CTL, 0, INF, FTSMPS, ftsmps, ftsmps, 100000), + VREG_MAP(FTS, FTS2p5_CTL, 0, INF, FTSMPS, ftsmps, ftsmps2p5, 100000), + VREG_MAP(BOOST_BYP, BB_2A, 0, INF, BOOST_BYP, boost, boost_byp, 0), + VREG_MAP(ULT_BUCK, ULT_HF_CTL1, 0, INF, ULT_LO_SMPS, ult_lo_smps, + ult_lo_smps, 100000), + VREG_MAP(ULT_BUCK, ULT_HF_CTL2, 0, INF, ULT_LO_SMPS, ult_lo_smps, + ult_lo_smps, 100000), + VREG_MAP(ULT_BUCK, ULT_HF_CTL3, 0, INF, ULT_LO_SMPS, ult_lo_smps, + ult_lo_smps, 100000), + VREG_MAP(ULT_BUCK, ULT_HF_CTL4, 0, INF, ULT_HO_SMPS, ult_ho_smps, + ult_ho_smps, 100000), + VREG_MAP(ULT_LDO, N300_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000), + VREG_MAP(ULT_LDO, N600_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000), + VREG_MAP(ULT_LDO, N1200_ST, 0, INF, ULT_LDO, ult_ldo, ult_nldo, 10000), + VREG_MAP(ULT_LDO, LV_P150, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000), + VREG_MAP(ULT_LDO, LV_P300, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000), + VREG_MAP(ULT_LDO, P600, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000), + VREG_MAP(ULT_LDO, P150, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 10000), + VREG_MAP(ULT_LDO, P50, 0, INF, ULT_LDO, ult_ldo, ult_pldo, 5000), +}; + +static void calculate_num_voltages(struct spmi_voltage_set_points *points) +{ + unsigned int n; + struct spmi_voltage_range *range = points->range; + + for (; range < points->range + points->count; range++) { + n = 0; + if (range->set_point_max_uV) { + n = range->set_point_max_uV - range->set_point_min_uV; + n /= range->step_uV + 1; + } + range->n_voltages = n; + points->n_voltages += n; + } +} + +static int spmi_regulator_match(struct spmi_regulator *vreg, u16 force_type) +{ + const struct spmi_regulator_mapping *mapping; + int ret, i; + u32 dig_major_rev; + u8 version[SPMI_COMMON_REG_SUBTYPE - SPMI_COMMON_REG_DIG_MAJOR_REV + 1]; + u8 type, subtype; + + ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_DIG_MAJOR_REV, version, + ARRAY_SIZE(version)); + if (ret) { + dev_err(vreg->dev, "could not read version registers\n"); + return ret; + } + dig_major_rev = version[SPMI_COMMON_REG_DIG_MAJOR_REV + - SPMI_COMMON_REG_DIG_MAJOR_REV]; + if (!force_type) { + type = version[SPMI_COMMON_REG_TYPE - + SPMI_COMMON_REG_DIG_MAJOR_REV]; + subtype = version[SPMI_COMMON_REG_SUBTYPE - + SPMI_COMMON_REG_DIG_MAJOR_REV]; + } else { + type = force_type >> 8; + subtype = force_type; + } + + for (i = 0; i < ARRAY_SIZE(supported_regulators); i++) { + mapping = &supported_regulators[i]; + if (mapping->type == type && mapping->subtype == subtype + && mapping->revision_min <= dig_major_rev + && mapping->revision_max >= dig_major_rev) + goto found; + } + + dev_err(vreg->dev, + "unsupported regulator: name=%s type=0x%02X, subtype=0x%02X, dig major rev=0x%02X\n", + vreg->desc.name, type, subtype, dig_major_rev); + + return -ENODEV; + +found: + vreg->logical_type = mapping->logical_type; + vreg->set_points = mapping->set_points; + vreg->hpm_min_load = mapping->hpm_min_load; + vreg->desc.ops = mapping->ops; + + if (mapping->set_points) { + if (!mapping->set_points->n_voltages) + calculate_num_voltages(mapping->set_points); + vreg->desc.n_voltages = mapping->set_points->n_voltages; + } + + return 0; +} + +static int spmi_regulator_ftsmps_init_slew_rate(struct spmi_regulator *vreg) +{ + int ret; + u8 reg = 0; + int step = 0, delay, i; + struct spmi_voltage_range *range = NULL; + u8 range_sel; + + ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_STEP_CTRL, ®, 1); + if (ret) { + dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret); + return ret; + } + + spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1); + + for (i = 0; i < vreg->set_points->count; i++) { + if (vreg->set_points->range[i].range_sel == range_sel) { + range = &vreg->set_points->range[i]; + break; + } + } + + if (!range) { + dev_err(vreg->dev, "range %d is invalid\n", range_sel); + return -EINVAL; + } + + step = (reg & SPMI_FTSMPS_STEP_CTRL_STEP_MASK) + >> SPMI_FTSMPS_STEP_CTRL_STEP_SHIFT; + + delay = (reg & SPMI_FTSMPS_STEP_CTRL_DELAY_MASK) + >> SPMI_FTSMPS_STEP_CTRL_DELAY_SHIFT; + + /* slew_rate has units of uV/us. */ + vreg->slew_rate = SPMI_FTSMPS_CLOCK_RATE * range->step_uV * (1 << step); + + vreg->slew_rate /= 1000 * (SPMI_FTSMPS_STEP_DELAY << delay); + + vreg->slew_rate = vreg->slew_rate * SPMI_FTSMPS_STEP_MARGIN_NUM + / SPMI_FTSMPS_STEP_MARGIN_DEN; + + /* Ensure that the slew rate is greater than 0. */ + vreg->slew_rate = max(vreg->slew_rate, 1); + + return ret; +} + +static int spmi_regulator_init_registers(struct spmi_regulator *vreg, + const struct spmi_regulator_init_data *data) +{ + int ret; + enum spmi_regulator_logical_type type; + u8 ctrl_reg[8], reg, mask; + + type = vreg->logical_type; + + ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, ctrl_reg, 8); + if (ret) + return ret; + + /* Set up enable pin control. */ + if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO + || type == SPMI_REGULATOR_LOGICAL_TYPE_VS) + && !(data->pin_ctrl_enable + & SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT)) { + ctrl_reg[SPMI_COMMON_IDX_ENABLE] &= + ~SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK; + ctrl_reg[SPMI_COMMON_IDX_ENABLE] |= + data->pin_ctrl_enable & SPMI_COMMON_ENABLE_FOLLOW_ALL_MASK; + } + + /* Set up HPM control. */ + if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO + || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO + || type == SPMI_REGULATOR_LOGICAL_TYPE_VS + || type == SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS) + && (data->hpm_enable != SPMI_REGULATOR_USE_HW_DEFAULT)) { + ctrl_reg[SPMI_COMMON_IDX_MODE] &= ~SPMI_COMMON_MODE_HPM_MASK; + ctrl_reg[SPMI_COMMON_IDX_MODE] |= + (data->hpm_enable ? SPMI_COMMON_MODE_HPM_MASK : 0); + } + + /* Set up auto mode control. */ + if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO + || type == SPMI_REGULATOR_LOGICAL_TYPE_VS + || type == SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS) + && (data->auto_mode_enable != SPMI_REGULATOR_USE_HW_DEFAULT)) { + ctrl_reg[SPMI_COMMON_IDX_MODE] &= + ~SPMI_COMMON_MODE_AUTO_MASK; + ctrl_reg[SPMI_COMMON_IDX_MODE] |= + (data->auto_mode_enable ? SPMI_COMMON_MODE_AUTO_MASK : 0); + } + + /* Set up mode pin control. */ + if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO) + && !(data->pin_ctrl_hpm + & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) { + ctrl_reg[SPMI_COMMON_IDX_MODE] &= + ~SPMI_COMMON_MODE_FOLLOW_ALL_MASK; + ctrl_reg[SPMI_COMMON_IDX_MODE] |= + data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_ALL_MASK; + } + + if (type == SPMI_REGULATOR_LOGICAL_TYPE_VS + && !(data->pin_ctrl_hpm & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) { + ctrl_reg[SPMI_COMMON_IDX_MODE] &= + ~SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK; + ctrl_reg[SPMI_COMMON_IDX_MODE] |= + data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK; + } + + if ((type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO) + && !(data->pin_ctrl_hpm + & SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT)) { + ctrl_reg[SPMI_COMMON_IDX_MODE] &= + ~SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK; + ctrl_reg[SPMI_COMMON_IDX_MODE] |= + data->pin_ctrl_hpm & SPMI_COMMON_MODE_FOLLOW_AWAKE_MASK; + } + + if ((type == SPMI_REGULATOR_LOGICAL_TYPE_LDO + || type == SPMI_REGULATOR_LOGICAL_TYPE_LN_LDO + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO) + && data->bypass_mode_enable != SPMI_REGULATOR_USE_HW_DEFAULT) { + ctrl_reg[SPMI_COMMON_IDX_MODE] &= + ~SPMI_COMMON_MODE_BYPASS_MASK; + ctrl_reg[SPMI_COMMON_IDX_MODE] |= + (data->bypass_mode_enable + ? SPMI_COMMON_MODE_BYPASS_MASK : 0); + } + + /* Set boost current limit. */ + if ((type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST + || type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST_BYP) + && data->boost_current_limit + != SPMI_BOOST_CURRENT_LIMIT_HW_DEFAULT) { + reg = data->boost_current_limit; + mask = SPMI_BOOST_CURRENT_LIMIT_MASK; + ret = spmi_vreg_update_bits(vreg, + (type == SPMI_REGULATOR_LOGICAL_TYPE_BOOST + ? SPMI_BOOST_REG_CURRENT_LIMIT + : SPMI_BOOST_BYP_REG_CURRENT_LIMIT), + reg, mask); + if (ret) + return ret; + } + + /* Write back any control register values that were modified. */ + ret = spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, ctrl_reg, 8); + if (ret) + return ret; + + /* Set pull down. */ + if ((type == SPMI_REGULATOR_LOGICAL_TYPE_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO + || type == SPMI_REGULATOR_LOGICAL_TYPE_LDO + || type == SPMI_REGULATOR_LOGICAL_TYPE_VS) + && data->pull_down_enable != SPMI_REGULATOR_USE_HW_DEFAULT) { + reg = data->pull_down_enable + ? SPMI_COMMON_PULL_DOWN_ENABLE_MASK : 0; + ret = spmi_vreg_write(vreg, SPMI_COMMON_REG_PULL_DOWN, ®, 1); + if (ret) + return ret; + } + + if (type == SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS + && data->pull_down_enable != SPMI_REGULATOR_USE_HW_DEFAULT) { + /* FTSMPS has other bits in the pull down control register. */ + reg = data->pull_down_enable + ? SPMI_COMMON_PULL_DOWN_ENABLE_MASK : 0; + ret = spmi_vreg_update_bits(vreg, + SPMI_COMMON_REG_PULL_DOWN, reg, + SPMI_COMMON_PULL_DOWN_ENABLE_MASK); + if (ret) + return ret; + } + + /* Set soft start for LDO. */ + if ((type == SPMI_REGULATOR_LOGICAL_TYPE_LDO + || type == SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO) + && data->soft_start_enable != SPMI_REGULATOR_USE_HW_DEFAULT) { + reg = data->soft_start_enable + ? SPMI_LDO_SOFT_START_ENABLE_MASK : 0; + ret = spmi_vreg_write(vreg, SPMI_LDO_REG_SOFT_START, ®, 1); + if (ret) + return ret; + } + + /* Set soft start strength and over current protection for VS. */ + if (type == SPMI_REGULATOR_LOGICAL_TYPE_VS) { + reg = 0; + mask = 0; + if (data->soft_start_enable != SPMI_REGULATOR_USE_HW_DEFAULT) { + reg |= data->soft_start_enable + ? SPMI_VS_SOFT_START_ENABLE_MASK : 0; + mask |= SPMI_VS_SOFT_START_ENABLE_MASK; + } + if (data->vs_soft_start_strength + != SPMI_VS_SOFT_START_STR_HW_DEFAULT) { + reg |= data->vs_soft_start_strength + & SPMI_VS_SOFT_START_SEL_MASK; + mask |= SPMI_VS_SOFT_START_SEL_MASK; + } + ret = spmi_vreg_update_bits(vreg, SPMI_VS_REG_SOFT_START, + reg, mask); + if (ret) + return ret; + + if (vreg->ocp_enable != SPMI_REGULATOR_USE_HW_DEFAULT) { + reg = vreg->ocp_enable ? SPMI_VS_OCP_NO_OVERRIDE + : SPMI_VS_OCP_OVERRIDE; + ret = spmi_vreg_write(vreg, SPMI_VS_REG_OCP, ®, 1); + if (ret) + return ret; + } + } + + /* Calculate the slew rate for FTSMPS regulators. */ + if (type == SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS) { + ret = spmi_regulator_ftsmps_init_slew_rate(vreg); + if (ret) + return ret; + } + + return 0; +} + +static void spmi_regulator_get_dt_config(struct spmi_regulator *vreg, + struct device_node *node, struct spmi_regulator_init_data *data) +{ + /* + * Initialize configuration parameters to use hardware default in case + * no value is specified via device tree. + */ + data->auto_mode_enable = SPMI_REGULATOR_USE_HW_DEFAULT; + data->bypass_mode_enable = SPMI_REGULATOR_USE_HW_DEFAULT; + vreg->ocp_enable = SPMI_REGULATOR_USE_HW_DEFAULT; + data->pull_down_enable = SPMI_REGULATOR_USE_HW_DEFAULT; + data->soft_start_enable = SPMI_REGULATOR_USE_HW_DEFAULT; + data->boost_current_limit = SPMI_BOOST_CURRENT_LIMIT_HW_DEFAULT; + data->pin_ctrl_enable = SPMI_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT; + data->pin_ctrl_hpm = SPMI_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT; + data->vs_soft_start_strength = SPMI_VS_SOFT_START_STR_HW_DEFAULT; + data->hpm_enable = SPMI_REGULATOR_USE_HW_DEFAULT; + + /* These bindings are optional, so it is okay if they aren't found. */ + of_property_read_u32(node, "qcom,auto-mode-enable", + &data->auto_mode_enable); + of_property_read_u32(node, "qcom,bypass-mode-enable", + &data->bypass_mode_enable); + of_property_read_u32(node, "qcom,ocp-enable", &vreg->ocp_enable); + of_property_read_u32(node, "qcom,ocp-max-retries", + &vreg->ocp_max_retries); + of_property_read_u32(node, "qcom,ocp-retry-delay", + &vreg->ocp_retry_delay_ms); + of_property_read_u32(node, "qcom,pull-down-enable", + &data->pull_down_enable); + of_property_read_u32(node, "qcom,soft-start-enable", + &data->soft_start_enable); + of_property_read_u32(node, "qcom,boost-current-limit", + &data->boost_current_limit); + of_property_read_u32(node, "qcom,pin-ctrl-enable", + &data->pin_ctrl_enable); + of_property_read_u32(node, "qcom,pin-ctrl-hpm", &data->pin_ctrl_hpm); + of_property_read_u32(node, "qcom,hpm-enable", &data->hpm_enable); + of_property_read_u32(node, "qcom,vs-soft-start-strength", + &data->vs_soft_start_strength); + of_property_read_u32(node, "qcom,system-load", &vreg->system_load); +} + +static int spmi_reg_of_parse(struct device_node *node, + const struct regulator_desc *desc, + struct regulator_config *config) +{ + struct spmi_regulator_init_data data = { }; + struct spmi_regulator *vreg = config->driver_data; + struct device *dev = config->dev; + int ret; + + spmi_regulator_get_dt_config(vreg, node, &data); + + if (!vreg->ocp_max_retries) + vreg->ocp_max_retries = SPMI_VS_OCP_DEFAULT_MAX_RETRIES; + if (!vreg->ocp_retry_delay_ms) + vreg->ocp_retry_delay_ms = SPMI_VS_OCP_DEFAULT_RETRY_DELAY_MS; + + ret = spmi_regulator_init_registers(vreg, &data); + if (ret) { + dev_err(dev, "common initialization failed, ret=%d\n", ret); + return ret; + } + + if (vreg->logical_type != SPMI_REGULATOR_LOGICAL_TYPE_VS) + vreg->ocp_irq = 0; + + if (vreg->ocp_irq) { + ret = devm_request_irq(dev, vreg->ocp_irq, + spmi_regulator_vs_ocp_isr, IRQF_TRIGGER_RISING, "ocp", + vreg); + if (ret < 0) { + dev_err(dev, "failed to request irq %d, ret=%d\n", + vreg->ocp_irq, ret); + return ret; + } + + INIT_DELAYED_WORK(&vreg->ocp_work, spmi_regulator_vs_ocp_work); + } + + return 0; +} + +static const struct spmi_regulator_data pm8941_regulators[] = { + { "s1", 0x1400, "vdd_s1", }, + { "s2", 0x1700, "vdd_s2", }, + { "s3", 0x1a00, "vdd_s3", }, + { "l1", 0x4000, "vdd_l1_l3", }, + { "l2", 0x4100, "vdd_l2_lvs_1_2_3", }, + { "l3", 0x4200, "vdd_l1_l3", }, + { "l4", 0x4300, "vdd_l4_l11", }, + { "l5", 0x4400, "vdd_l5_l7", NULL, 0x0410 }, + { "l6", 0x4500, "vdd_l6_l12_l14_l15", }, + { "l7", 0x4600, "vdd_l5_l7", NULL, 0x0410 }, + { "l8", 0x4700, "vdd_l8_l16_l18_19", }, + { "l9", 0x4800, "vdd_l9_l10_l17_l22", }, + { "l10", 0x4900, "vdd_l9_l10_l17_l22", }, + { "l11", 0x4a00, "vdd_l4_l11", }, + { "l12", 0x4b00, "vdd_l6_l12_l14_l15", }, + { "l13", 0x4c00, "vdd_l13_l20_l23_l24", }, + { "l14", 0x4d00, "vdd_l6_l12_l14_l15", }, + { "l15", 0x4e00, "vdd_l6_l12_l14_l15", }, + { "l16", 0x4f00, "vdd_l8_l16_l18_19", }, + { "l17", 0x5000, "vdd_l9_l10_l17_l22", }, + { "l18", 0x5100, "vdd_l8_l16_l18_19", }, + { "l19", 0x5200, "vdd_l8_l16_l18_19", }, + { "l20", 0x5300, "vdd_l13_l20_l23_l24", }, + { "l21", 0x5400, "vdd_l21", }, + { "l22", 0x5500, "vdd_l9_l10_l17_l22", }, + { "l23", 0x5600, "vdd_l13_l20_l23_l24", }, + { "l24", 0x5700, "vdd_l13_l20_l23_l24", }, + { "lvs1", 0x8000, "vdd_l2_lvs_1_2_3", }, + { "lvs2", 0x8100, "vdd_l2_lvs_1_2_3", }, + { "lvs3", 0x8200, "vdd_l2_lvs_1_2_3", }, + { "mvs1", 0x8300, "vin_5vs", }, + { "mvs2", 0x8400, "vin_5vs", }, + { } +}; + +static const struct spmi_regulator_data pm8841_regulators[] = { + { "s1", 0x1400, "vdd_s1", }, + { "s2", 0x1700, "vdd_s2", NULL, 0x1c08 }, + { "s3", 0x1a00, "vdd_s3", }, + { "s4", 0x1d00, "vdd_s4", NULL, 0x1c08 }, + { "s5", 0x2000, "vdd_s5", NULL, 0x1c08 }, + { "s6", 0x2300, "vdd_s6", NULL, 0x1c08 }, + { "s7", 0x2600, "vdd_s7", NULL, 0x1c08 }, + { "s8", 0x2900, "vdd_s8", NULL, 0x1c08 }, + { } +}; + +static const struct spmi_regulator_data pm8916_regulators[] = { + { "s1", 0x1400, "vdd_s1", }, + { "s2", 0x1700, "vdd_s2", }, + { "s3", 0x1a00, "vdd_s3", }, + { "s4", 0x1d00, "vdd_s4", }, + { "l1", 0x4000, "vdd_l1_l3", }, + { "l2", 0x4100, "vdd_l2", }, + { "l3", 0x4200, "vdd_l1_l3", }, + { "l4", 0x4300, "vdd_l4_l5_l6", }, + { "l5", 0x4400, "vdd_l4_l5_l6", }, + { "l6", 0x4500, "vdd_l4_l5_l6", }, + { "l7", 0x4600, "vdd_l7", }, + { "l8", 0x4700, "vdd_l8_l11_l14_l15_l16", }, + { "l9", 0x4800, "vdd_l9_l10_l12_l13_l17_l18", }, + { "l10", 0x4900, "vdd_l9_l10_l12_l13_l17_l18", }, + { "l11", 0x4a00, "vdd_l8_l11_l14_l15_l16", }, + { "l12", 0x4b00, "vdd_l9_l10_l12_l13_l17_l18", }, + { "l13", 0x4c00, "vdd_l9_l10_l12_l13_l17_l18", }, + { "l14", 0x4d00, "vdd_l8_l11_l14_l15_l16", }, + { "l15", 0x4e00, "vdd_l8_l11_l14_l15_l16", }, + { "l16", 0x4f00, "vdd_l8_l11_l14_l15_l16", }, + { "l17", 0x5000, "vdd_l9_l10_l12_l13_l17_l18", }, + { "l18", 0x5100, "vdd_l9_l10_l12_l13_l17_l18", }, + { } +}; + +static const struct of_device_id qcom_spmi_regulator_match[] = { + { .compatible = "qcom,pm8841-regulators", .data = &pm8841_regulators }, + { .compatible = "qcom,pm8916-regulators", .data = &pm8916_regulators }, + { .compatible = "qcom,pm8941-regulators", .data = &pm8941_regulators }, + { } +}; +MODULE_DEVICE_TABLE(of, qcom_spmi_regulator_match); + +static int qcom_spmi_regulator_probe(struct platform_device *pdev) +{ + const struct spmi_regulator_data *reg; + const struct of_device_id *match; + struct regulator_config config = { }; + struct regulator_dev *rdev; + struct spmi_regulator *vreg; + struct regmap *regmap; + const char *name; + struct device *dev = &pdev->dev; + int ret; + struct list_head *vreg_list; + + vreg_list = devm_kzalloc(dev, sizeof(*vreg_list), GFP_KERNEL); + if (!vreg_list) + return -ENOMEM; + INIT_LIST_HEAD(vreg_list); + platform_set_drvdata(pdev, vreg_list); + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) + return -ENODEV; + + match = of_match_device(qcom_spmi_regulator_match, &pdev->dev); + if (!match) + return -ENODEV; + + for (reg = match->data; reg->name; reg++) { + vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL); + if (!vreg) + return -ENOMEM; + + vreg->dev = dev; + vreg->base = reg->base; + vreg->regmap = regmap; + + if (reg->ocp) { + vreg->ocp_irq = platform_get_irq_byname(pdev, reg->ocp); + if (vreg->ocp_irq < 0) { + ret = vreg->ocp_irq; + goto err; + } + } + + vreg->desc.id = -1; + vreg->desc.owner = THIS_MODULE; + vreg->desc.type = REGULATOR_VOLTAGE; + vreg->desc.name = name = reg->name; + vreg->desc.supply_name = reg->supply; + vreg->desc.of_match = reg->name; + vreg->desc.of_parse_cb = spmi_reg_of_parse; + + ret = spmi_regulator_match(vreg, reg->force_type); + if (ret) + goto err; + + config.dev = dev; + config.driver_data = vreg; + rdev = devm_regulator_register(dev, &vreg->desc, &config); + if (IS_ERR(rdev)) { + dev_err(dev, "failed to register %s\n", name); + ret = PTR_ERR(rdev); + goto err; + } + + INIT_LIST_HEAD(&vreg->node); + list_add(&vreg->node, vreg_list); + } + + return 0; + +err: + list_for_each_entry(vreg, vreg_list, node) + if (vreg->ocp_irq) + cancel_delayed_work_sync(&vreg->ocp_work); + return ret; +} + +static int qcom_spmi_regulator_remove(struct platform_device *pdev) +{ + struct spmi_regulator *vreg; + struct list_head *vreg_list = platform_get_drvdata(pdev); + + list_for_each_entry(vreg, vreg_list, node) + if (vreg->ocp_irq) + cancel_delayed_work_sync(&vreg->ocp_work); + + return 0; +} + +static struct platform_driver qcom_spmi_regulator_driver = { + .driver = { + .name = "qcom-spmi-regulator", + .of_match_table = qcom_spmi_regulator_match, + }, + .probe = qcom_spmi_regulator_probe, + .remove = qcom_spmi_regulator_remove, +}; +module_platform_driver(qcom_spmi_regulator_driver); + +MODULE_DESCRIPTION("Qualcomm SPMI PMIC regulator driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:qcom-spmi-regulator"); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
