This is the pinctrl, pinmux, pinconf and gpiolib driver for the
Qualcomm GPIO sub-function blocks found in the PMIC chips.
Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
---
drivers/pinctrl/qcom/Kconfig | 13 +
drivers/pinctrl/qcom/Makefile | 1 +
drivers/pinctrl/qcom/pinctrl-spmi-gpio.c | 937 +++++++++++++++++++++++++++++++
3 files changed, 951 insertions(+)
create mode 100644 drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
index d160a71..e376dd3 100644
--- a/drivers/pinctrl/qcom/Kconfig
+++ b/drivers/pinctrl/qcom/Kconfig
@@ -39,4 +39,17 @@ config PINCTRL_MSM8X74
This is the pinctrl, pinmux, pinconf and gpiolib driver for the
Qualcomm TLMM block found in the Qualcomm 8974 platform.
+config PINCTRL_QCOM_SPMI_PMIC
+ tristate "Qualcomm SPMI PMIC pin controller driver"
+ depends on GPIOLIB && OF && SPMI
+ select REGMAP_SPMI
+ select PINMUX
+ select PINCONF
+ select GENERIC_PINCONF
+ help
+ This is the pinctrl, pinmux, pinconf and gpiolib driver for the
+ Qualcomm GPIO and MPP blocks found in the Qualcomm PMIC's chips,
+ which are using SPMI for communication with SoC. Example PMIC's
+ devices are pm8841, pm8941 and pma8084.
+
endif
diff --git a/drivers/pinctrl/qcom/Makefile b/drivers/pinctrl/qcom/Makefile
index 2a02602..fc86fe4 100644
--- a/drivers/pinctrl/qcom/Makefile
+++ b/drivers/pinctrl/qcom/Makefile
@@ -4,3 +4,4 @@ obj-$(CONFIG_PINCTRL_APQ8064) += pinctrl-apq8064.o
obj-$(CONFIG_PINCTRL_IPQ8064) += pinctrl-ipq8064.o
obj-$(CONFIG_PINCTRL_MSM8960) += pinctrl-msm8960.o
obj-$(CONFIG_PINCTRL_MSM8X74) += pinctrl-msm8x74.o
+obj-$(CONFIG_PINCTRL_QCOM_SPMI_PMIC) += pinctrl-spmi-gpio.o
diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
new file mode 100644
index 0000000..778a474
--- /dev/null
+++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
@@ -0,0 +1,937 @@
+/*
+ * Copyright (c) 2012-2014, 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/gpio.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
+
+#include "../core.h"
+#include "../pinctrl-utils.h"
+
+#define PMIC_GPIO_ADDRESS_RANGE 0x100
+
+/* type and subtype registers base address offsets */
+#define PMIC_GPIO_REG_TYPE 0x4
+#define PMIC_GPIO_REG_SUBTYPE 0x5
+
+/* GPIO peripheral type and subtype out_values */
+#define PMIC_GPIO_TYPE 0x10
+#define PMIC_GPIO_SUBTYPE_GPIO_4CH 0x1
+#define PMIC_GPIO_SUBTYPE_GPIOC_4CH 0x5
+#define PMIC_GPIO_SUBTYPE_GPIO_8CH 0x9
+#define PMIC_GPIO_SUBTYPE_GPIOC_8CH 0xd
+
+#define PMIC_MPP_REG_RT_STS 0x10
+#define PMIC_MPP_REG_RT_STS_VAL_MASK 0x1
+
+/* control register base address offsets */
+#define PMIC_GPIO_REG_MODE_CTL 0x40
+#define PMIC_GPIO_REG_DIG_VIN_CTL 0x41
+#define PMIC_GPIO_REG_DIG_PULL_CTL 0x42
+#define PMIC_GPIO_REG_DIG_OUT_CTL 0x45
+#define PMIC_GPIO_REG_EN_CTL 0x46
+
+/* PMIC_GPIO_REG_MODE_CTL */
+#define PMIC_GPIO_REG_MODE_VALUE_SHIFT 0x1
+#define PMIC_GPIO_REG_MODE_FUNCTION_SHIFT 1
+#define PMIC_GPIO_REG_MODE_FUNCTION_MASK 0x7
+#define PMIC_GPIO_REG_MODE_DIR_SHIFT 4
+#define PMIC_GPIO_REG_MODE_DIR_MASK 0x7
+
+/* PMIC_GPIO_REG_DIG_VIN_CTL */
+#define PMIC_GPIO_REG_VIN_SHIFT 0
+#define PMIC_GPIO_REG_VIN_MASK 0x7
+
+/* PMIC_GPIO_REG_DIG_PULL_CTL */
+#define PMIC_GPIO_REG_PULL_SHIFT 0
+#define PMIC_GPIO_REG_PULL_MASK 0x7
+
+#define PMIC_GPIO_PULL_DOWN 4
+#define PMIC_GPIO_PULL_DISABLE 5
+
+/* PMIC_GPIO_REG_DIG_OUT_CTL */
+#define PMIC_GPIO_REG_OUT_STRENGTH_SHIFT 0
+#define PMIC_GPIO_REG_OUT_STRENGTH_MASK 0x3
+#define PMIC_GPIO_REG_OUT_TYPE_SHIFT 4
+#define PMIC_GPIO_REG_OUT_TYPE_MASK 0x3
+
+/*
+ * Output type - indicates pin should be configured as push-pull,
+ * open drain or open source.
+ */
+#define PMIC_GPIO_OUT_BUF_CMOS 0
+#define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS 1
+#define PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS 2
+
+/* PMIC_GPIO_REG_EN_CTL */
+#define PMIC_GPIO_REG_MASTER_EN_SHIFT 7
+
+#define PMIC_GPIO_PHYSICAL_OFFSET 1
+
+/* Qualcomm specific pin configurations */
+#define PMIC_GPIO_CONF_PULL_UP (PIN_CONFIG_END + 1)
+#define PMIC_GPIO_CONF_STRENGTH (PIN_CONFIG_END + 2)
+
+/**
+ * struct pmic_gpio_pad - keep current GPIO settings
+ * @base: Address base in SPMI device.
+ * @irq: IRQ number which this GPIO generate.
+ * @is_enabled: Set to false when GPIO should be put in high Z state.
+ * @out_value: Cached pin output value
+ * @have_buffer: Set to true if GPIO output could be configured in push-pull,
+ * open-drain or open-source mode.
+ * @output_enabled: Set to true if GPIO output logic is enabled.
+ * @input_enabled: Set to true if GPIO input buffer logic is enabled.
+ * @num_sources: Number of power-sources supported by this GPIO.
+ * @power_source: Current power-source used.
+ * @buffer_type: Push-pull, open-drain or open-source.
+ * @pullup: Constant current which flow trough GPIO output buffer.
+ * @strength: No, Low, Medium, High
+ * @function: See pmic_gpio_functions[]
+ */
+struct pmic_gpio_pad {
+ u16 base;
+ int irq;
+ bool is_enabled;
+ bool out_value;
+ bool have_buffer;
+ bool output_enabled;
+ bool input_enabled;
+ unsigned int num_sources;
+ unsigned int power_source;
+ unsigned int buffer_type;
+ unsigned int pullup;
+ unsigned int strength;
+ unsigned int function;
+};
+
+struct pmic_gpio_state {
+ struct device *dev;
+ struct regmap *map;
+ struct pinctrl_dev *ctrl;
+ struct gpio_chip chip;
+};
+
+struct pmic_gpio_bindings {
+ const char *property;
+ unsigned param;
+};
+
+static struct pmic_gpio_bindings pmic_gpio_bindings[] = {
+ {"qcom,pull-up-strength", PMIC_GPIO_CONF_PULL_UP},
+ {"qcom,drive-strength", PMIC_GPIO_CONF_STRENGTH},
+};
+
+static const char *const pmic_gpio_groups[] = {
+ "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", "gpio8",
+ "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", "gpio15",
+ "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", "gpio22",
+ "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", "gpio29",
+ "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", "gpio36",
+};
+
+static const char *const pmic_gpio_functions[] = {
+ PMIC_GPIO_FUNC_NORMAL, PMIC_GPIO_FUNC_PAIRED,
+ PMIC_GPIO_FUNC_FUNC1, PMIC_GPIO_FUNC_FUNC2,
+ PMIC_GPIO_FUNC_DTEST1, PMIC_GPIO_FUNC_DTEST2,
+ PMIC_GPIO_FUNC_DTEST3, PMIC_GPIO_FUNC_DTEST4,
+};
+
+static inline struct pmic_gpio_state *to_gpio_state(struct gpio_chip *chip)
+{
+ return container_of(chip, struct pmic_gpio_state, chip);
+};
+
+static int pmic_gpio_read(struct pmic_gpio_state *state,
+ struct pmic_gpio_pad *pad, unsigned int addr)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(state->map, pad->base + addr, &val);
+ if (ret < 0)
+ dev_err(state->dev, "read 0x%x failed\n", addr);
+ else
+ ret = val;
+
+ return ret;
+}
+
+static int pmic_gpio_write(struct pmic_gpio_state *state,
+ struct pmic_gpio_pad *pad, unsigned int addr,
+ unsigned int val)
+{
+ int ret;
+
+ ret = regmap_write(state->map, pad->base + addr, val);
+ if (ret < 0)
+ dev_err(state->dev, "write 0x%x failed\n", addr);
+
+ return ret;
+}
+
+static int pmic_gpio_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ /* Every PIN is a group */
+ return pctldev->desc->npins;
+}
+
+static const char *pmic_gpio_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned pin)
+{
+ return pctldev->desc->pins[pin].name;
+}
+
+static int pmic_gpio_get_group_pins(struct pinctrl_dev *pctldev, unsigned pin,
+ const unsigned **pins, unsigned *num_pins)
+{
+ *pins = &pctldev->desc->pins[pin].number;
+ *num_pins = 1;
+ return 0;
+}
+
+static int pmic_gpio_parse_dt_config(struct device_node *np,
+ struct pinctrl_dev *pctldev,
+ unsigned long **configs,
+ unsigned int *nconfs)
+{
+ struct pmic_gpio_bindings *par;
+ unsigned long cfg;
+ int ret, i;
+ u32 val;
+
+ for (i = 0; i < ARRAY_SIZE(pmic_gpio_bindings); i++) {
+ par = &pmic_gpio_bindings[i];
+ ret = of_property_read_u32(np, par->property, &val);
+
+ /* property not found */
+ if (ret == -EINVAL)
+ continue;
+
+ /* use zero as default value */
+ if (ret)
+ val = 0;
+
+ dev_dbg(pctldev->dev, "found %s with value %u\n",
+ par->property, val);
+
+ cfg = pinconf_to_config_packed(par->param, val);
+
+ ret = pinctrl_utils_add_config(pctldev, configs, nconfs, cfg);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int pmic_gpio_dt_subnode_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct pinctrl_map **map,
+ unsigned *reserv, unsigned *nmaps,
+ enum pinctrl_map_type type)
+{
+ unsigned long *configs = NULL;
+ unsigned nconfs = 0;
+ struct property *prop;
+ const char *group;
+ int ret;
+
+ ret = pmic_gpio_parse_dt_config(np, pctldev, &configs, &nconfs);
+ if (ret < 0)
+ return ret;
+
+ if (!nconfs)
+ return 0;
+
+ ret = of_property_count_strings(np, "pins");
+ if (ret < 0)
+ goto exit;
+
+ ret = pinctrl_utils_reserve_map(pctldev, map, reserv, nmaps, ret);
+ if (ret < 0)
+ goto exit;
+
+ of_property_for_each_string(np, "pins", prop, group) {
+ ret = pinctrl_utils_add_map_configs(pctldev, map,
+ reserv, nmaps, group,
+ configs, nconfs, type);
+ if (ret < 0)
+ break;
+ }
+exit:
+ kfree(configs);
+ return ret;
+}
+
+static int pmic_gpio_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np_config,
+ struct pinctrl_map **map, unsigned *nmaps)
+{
+ enum pinctrl_map_type type;
+ struct device_node *np;
+ unsigned reserv;
+ int ret;
+
+ ret = 0;
+ *map = NULL;
+ *nmaps = 0;
+ reserv = 0;
+ type = PIN_MAP_TYPE_CONFIGS_GROUP;
+
+ for_each_child_of_node(np_config, np) {
+ ret = pinconf_generic_dt_subnode_to_map(pctldev, np, map,
+ &reserv, nmaps, type);
+ if (ret)
+ break;
+
+ ret = pmic_gpio_dt_subnode_to_map(pctldev, np, map, &reserv,
+ nmaps, type);
+ if (ret)
+ break;
+ }
+
+ if (ret < 0)
+ pinctrl_utils_dt_free_map(pctldev, *map, *nmaps);
+
+ return ret;
+}
+
+static const struct pinctrl_ops pmic_gpio_pinctrl_ops = {
+ .get_groups_count = pmic_gpio_get_groups_count,
+ .get_group_name = pmic_gpio_get_group_name,
+ .get_group_pins = pmic_gpio_get_group_pins,
+ .dt_node_to_map = pmic_gpio_dt_node_to_map,
+ .dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int pmic_gpio_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ return ARRAY_SIZE(pmic_gpio_functions);
+}
+
+static const char *pmic_gpio_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned function)
+{
+ return pmic_gpio_functions[function];
+}
+
+static int pmic_gpio_get_function_groups(struct pinctrl_dev *pctldev,
+ unsigned function,
+ const char *const **groups,
+ unsigned *const num_qgroups)
+{
+ *groups = pmic_gpio_groups;
+ *num_qgroups = pctldev->desc->npins;
+ return 0;
+}
+
+static int pmic_gpio_pinmux_enable(struct pinctrl_dev *pctldev,
+ unsigned function, unsigned pin)
+{
+ struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev);
+ struct pmic_gpio_pad *pad;
+ unsigned int val;
+ int ret;
+
+ pad = pctldev->desc->pins[pin].drv_data;
+
+ pad->function = function;
+
+ val = 0;
+ if (pad->output_enabled) {
+ if (pad->input_enabled)
+ val = 2;
+ else
+ val = 1;
+ }
+
+ val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT;
+ val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT;
+
+ ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val);
+ if (ret < 0)
+ return ret;
+
+ val = pad->is_enabled << PMIC_GPIO_REG_MASTER_EN_SHIFT;
+
+ return pmic_gpio_write(state, pad, PMIC_GPIO_REG_EN_CTL, val);
+}
+
+static const struct pinmux_ops pmic_gpio_pinmux_ops = {
+ .get_functions_count = pmic_gpio_get_functions_count,
+ .get_function_name = pmic_gpio_get_function_name,
+ .get_function_groups = pmic_gpio_get_function_groups,
+ .enable = pmic_gpio_pinmux_enable,
+};
+
+static int pmic_gpio_config_get(struct pinctrl_dev *pctldev,
+ unsigned int pin, unsigned long *config)
+{
+ unsigned param = pinconf_to_config_param(*config);
+ struct pmic_gpio_pad *pad;
+ unsigned arg;
+
+ pad = pctldev->desc->pins[pin].drv_data;
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ arg = pad->buffer_type == PMIC_GPIO_OUT_BUF_CMOS;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ arg = pad->buffer_type == PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_SOURCE:
+ arg = pad->buffer_type == PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ arg = pad->pullup == PMIC_GPIO_PULL_DOWN;
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ arg = pad->pullup = PMIC_GPIO_PULL_DISABLE;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ arg = pad->pullup == PMIC_GPIO_PULL_UP_30;
+ break;
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ arg = !pad->is_enabled;
+ break;
+ case PIN_CONFIG_POWER_SOURCE:
+ arg = pad->power_source;
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ arg = pad->input_enabled;
+ break;
+ case PIN_CONFIG_OUTPUT:
+ arg = pad->out_value;
+ break;
+ case PMIC_GPIO_CONF_PULL_UP:
+ arg = pad->pullup;
+ break;
+ case PMIC_GPIO_CONF_STRENGTH:
+ arg = pad->strength;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+ return 0;
+}
+
+static int pmic_gpio_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned nconfs)
+{
+ struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev);
+ struct pmic_gpio_pad *pad;
+ unsigned param, arg;
+ unsigned int val;
+ int i, ret;
+
+ pad = pctldev->desc->pins[pin].drv_data;
+
+ for (i = 0; i < nconfs; i++) {
+ param = pinconf_to_config_param(configs[i]);
+ arg = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ pad->buffer_type = PMIC_GPIO_OUT_BUF_CMOS;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ if (!pad->have_buffer)
+ return -EINVAL;
+ pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_NMOS;
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_SOURCE:
+ if (!pad->have_buffer)
+ return -EINVAL;
+ pad->buffer_type = PMIC_GPIO_OUT_BUF_OPEN_DRAIN_PMOS;
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ pad->pullup = PMIC_GPIO_PULL_DISABLE;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ pad->pullup = PMIC_GPIO_PULL_UP_30;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg)
+ pad->pullup = PMIC_GPIO_PULL_DOWN;
+ else
+ pad->pullup = PMIC_GPIO_PULL_DISABLE;
+ break;
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ pad->is_enabled = false;
+ break;
+ case PIN_CONFIG_POWER_SOURCE:
+ if (arg > pad->num_sources)
+ return -EINVAL;
+ pad->power_source = arg;
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ pad->input_enabled = arg ? true : false;
+ break;
+ case PIN_CONFIG_OUTPUT:
+ pad->output_enabled = true;
+ pad->out_value = arg;
+ break;
+ case PMIC_GPIO_CONF_PULL_UP:
+ if (arg > PMIC_GPIO_PULL_UP_1P5_30)
+ return -EINVAL;
+ pad->pullup = arg;
+ break;
+ case PMIC_GPIO_CONF_STRENGTH:
+ if (arg > PMIC_GPIO_STRENGTH_LOW)
+ return -EINVAL;
+ pad->strength = arg;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ val = pad->power_source << PMIC_GPIO_REG_VIN_SHIFT;
+
+ ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL, val);
+ if (ret < 0)
+ return ret;
+
+ val = pad->pullup << PMIC_GPIO_REG_PULL_SHIFT;
+
+ ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL, val);
+ if (ret < 0)
+ return ret;
+
+ val = pad->buffer_type << PMIC_GPIO_REG_OUT_TYPE_SHIFT;
+ val = pad->strength << PMIC_GPIO_REG_OUT_STRENGTH_SHIFT;
+
+ ret = pmic_gpio_write(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL, val);
+ if (ret < 0)
+ return ret;
+
+ val = 0;
+ if (pad->output_enabled) {
+ if (pad->input_enabled)
+ val = 2;
+ else
+ val = 1;
+ }
+
+ val = val << PMIC_GPIO_REG_MODE_DIR_SHIFT;
+ val |= pad->function << PMIC_GPIO_REG_MODE_FUNCTION_SHIFT;
+ val |= pad->out_value & PMIC_GPIO_REG_MODE_VALUE_SHIFT;
+
+ return pmic_gpio_write(state, pad, PMIC_GPIO_REG_MODE_CTL, val);
+}
+
+static void pmic_gpio_config_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned pin)
+{
+ struct pmic_gpio_state *state = pinctrl_dev_get_drvdata(pctldev);
+ struct pmic_gpio_pad *pad;
+ int ret, val;
+
+ static const char *const biases[] = {
+ "pull-up 30uA", "pull-up 1.5uA", "pull-up 31.5uA",
+ "pull-up 1.5uA + 30uA boost", "pull-down 10uA", "no pull"
+ };
+ static const char *const buffer_types[] = {
+ "push-pull", "open-drain", "open-source"
+ };
+ static const char *const strengths[] = {
+ "no", "high", "medium", "low"
+ };
+
+ pad = pctldev->desc->pins[pin].drv_data;
+
+ seq_printf(s, " gpio%-2d:", pin + PMIC_GPIO_PHYSICAL_OFFSET);
+
+ val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_EN_CTL);
+
+ if (val < 0 || !(val >> PMIC_GPIO_REG_MASTER_EN_SHIFT)) {
+ seq_puts(s, " ---");
+ } else {
+
+ if (!pad->input_enabled) {
+ ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS);
+ if (!ret) {
+ ret &= PMIC_MPP_REG_RT_STS_VAL_MASK;
+ pad->out_value = ret;
+ }
+ }
+
+ seq_printf(s, " %-4s", pad->output_enabled ? "out" : "in");
+ seq_printf(s, " %-7s", pmic_gpio_functions[pad->function]);
+ seq_printf(s, " vin-%d", pad->power_source);
+ seq_printf(s, " %-27s", biases[pad->pullup]);
+ seq_printf(s, " %-10s", buffer_types[pad->buffer_type]);
+ seq_printf(s, " %-4s", pad->out_value ? "high" : "low");
+ seq_printf(s, " %-7s", strengths[pad->strength]);
+ }
+}
+
+static const struct pinconf_ops pmic_gpio_pinconf_ops = {
+ .pin_config_group_get = pmic_gpio_config_get,
+ .pin_config_group_set = pmic_gpio_config_set,
+ .pin_config_group_dbg_show = pmic_gpio_config_dbg_show,
+};
+
+static int pmic_gpio_direction_input(struct gpio_chip *chip, unsigned pin)
+{
+ struct pmic_gpio_state *state = to_gpio_state(chip);
+ unsigned long config;
+
+ config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1);
+
+ return pmic_gpio_config_set(state->ctrl, pin, &config, 1);
+}
+
+static int pmic_gpio_direction_output(struct gpio_chip *chip,
+ unsigned pin, int val)
+{
+ struct pmic_gpio_state *state = to_gpio_state(chip);
+ unsigned long config;
+
+ config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val);
+
+ return pmic_gpio_config_set(state->ctrl, pin, &config, 1);
+}
+
+static int pmic_gpio_get(struct gpio_chip *chip, unsigned pin)
+{
+ struct pmic_gpio_state *state = to_gpio_state(chip);
+ struct pmic_gpio_pad *pad;
+ int ret;
+
+ pad = state->ctrl->desc->pins[pin].drv_data;
+
+ if (!pad->is_enabled)
+ return -EINVAL;
+
+ if (pad->input_enabled) {
+ ret = pmic_gpio_read(state, pad, PMIC_MPP_REG_RT_STS);
+ if (ret < 0)
+ return ret;
+
+ pad->out_value = ret & PMIC_MPP_REG_RT_STS_VAL_MASK;
+ }
+
+ return pad->out_value;
+}
+
+static void pmic_gpio_set(struct gpio_chip *chip, unsigned pin, int value)
+{
+ struct pmic_gpio_state *state = to_gpio_state(chip);
+ unsigned long config;
+
+ config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value);
+
+ pmic_gpio_config_set(state->ctrl, pin, &config, 1);
+}
+
+static int pmic_gpio_request(struct gpio_chip *chip, unsigned base)
+{
+ return pinctrl_request_gpio(chip->base + base);
+}
+
+static void pmic_gpio_free(struct gpio_chip *chip, unsigned base)
+{
+ pinctrl_free_gpio(chip->base + base);
+}
+
+static int pmic_gpio_of_xlate(struct gpio_chip *chip,
+ const struct of_phandle_args *gpio_desc,
+ u32 *flags)
+{
+ if (chip->of_gpio_n_cells < 2)
+ return -EINVAL;
+
+ if (flags)
+ *flags = gpio_desc->args[1];
+
+ return gpio_desc->args[0] - PMIC_GPIO_PHYSICAL_OFFSET;
+}
+
+static int pmic_gpio_to_irq(struct gpio_chip *chip, unsigned pin)
+{
+ struct pmic_gpio_state *state = to_gpio_state(chip);
+ struct pmic_gpio_pad *pad;
+
+ pad = state->ctrl->desc->pins[pin].drv_data;
+
+ return pad->irq;
+}
+
+static void pmic_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
+{
+ struct pmic_gpio_state *state = to_gpio_state(chip);
+ unsigned i;
+
+ for (i = 0; i < chip->ngpio; i++) {
+ pmic_gpio_config_dbg_show(state->ctrl, s, i);
+ seq_puts(s, "\n");
+ }
+}
+
+static const struct gpio_chip pmic_gpio_gpio_template = {
+ .direction_input = pmic_gpio_direction_input,
+ .direction_output = pmic_gpio_direction_output,
+ .get = pmic_gpio_get,
+ .set = pmic_gpio_set,
+ .request = pmic_gpio_request,
+ .free = pmic_gpio_free,
+ .of_xlate = pmic_gpio_of_xlate,
+ .to_irq = pmic_gpio_to_irq,
+ .dbg_show = pmic_gpio_dbg_show,
+};
+
+static int pmic_gpio_populate(struct pmic_gpio_state *state,
+ struct pmic_gpio_pad *pad)
+{
+ int type, subtype, val, dir;
+
+ type = pmic_gpio_read(state, pad, PMIC_GPIO_REG_TYPE);
+ if (type < 0)
+ return type;
+
+ if (type != PMIC_GPIO_TYPE) {
+ dev_err(state->dev, "incorrect block type 0x%x at 0x%x\n",
+ type, pad->base);
+ return -ENODEV;
+ }
+
+ subtype = pmic_gpio_read(state, pad, PMIC_GPIO_REG_SUBTYPE);
+ if (subtype < 0)
+ return subtype;
+
+ switch (subtype) {
+ case PMIC_GPIO_SUBTYPE_GPIO_4CH:
+ pad->have_buffer = true;
+ case PMIC_GPIO_SUBTYPE_GPIOC_4CH:
+ pad->num_sources = 4;
+ break;
+ case PMIC_GPIO_SUBTYPE_GPIO_8CH:
+ pad->have_buffer = true;
+ case PMIC_GPIO_SUBTYPE_GPIOC_8CH:
+ pad->num_sources = 8;
+ break;
+ default:
+ dev_err(state->dev, "unknown GPIO type 0x%x\n", subtype);
+ return -ENODEV;
+ }
+
+ val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_MODE_CTL);
+ if (val < 0)
+ return val;
+
+ pad->out_value = val & PMIC_GPIO_REG_MODE_VALUE_SHIFT;
+
+ dir = val >> PMIC_GPIO_REG_MODE_DIR_SHIFT;
+ dir &= PMIC_GPIO_REG_MODE_DIR_MASK;
+ switch (dir) {
+ case 0:
+ pad->input_enabled = true;
+ pad->output_enabled = false;
+ break;
+ case 1:
+ pad->input_enabled = false;
+ pad->output_enabled = true;
+ break;
+ case 2:
+ pad->input_enabled = true;
+ pad->output_enabled = true;
+ break;
+ default:
+ dev_err(state->dev, "unknown GPIO direction\n");
+ return -ENODEV;
+ }
+
+ pad->function = val >> PMIC_GPIO_REG_MODE_FUNCTION_SHIFT;
+ pad->function &= PMIC_GPIO_REG_MODE_FUNCTION_MASK;
+
+ val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_VIN_CTL);
+ if (val < 0)
+ return val;
+
+ pad->power_source = val >> PMIC_GPIO_REG_VIN_SHIFT;
+ pad->power_source &= PMIC_GPIO_REG_VIN_MASK;
+
+ val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_PULL_CTL);
+ if (val < 0)
+ return val;
+
+ pad->pullup = val >> PMIC_GPIO_REG_PULL_SHIFT;
+ pad->pullup &= PMIC_GPIO_REG_PULL_MASK;
+
+ val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_DIG_OUT_CTL);
+ if (val < 0)
+ return val;
+
+ pad->strength = val >> PMIC_GPIO_REG_OUT_STRENGTH_SHIFT;
+ pad->strength &= PMIC_GPIO_REG_OUT_STRENGTH_MASK;
+
+ pad->buffer_type = val >> PMIC_GPIO_REG_OUT_TYPE_SHIFT;
+ pad->buffer_type &= PMIC_GPIO_REG_OUT_TYPE_MASK;
+
+ /* Pin could be disabled with PIN_CONFIG_BIAS_HIGH_IMPEDANCE */
+ pad->is_enabled = true;
+ return 0;
+}
+
+static int pmic_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct pinctrl_pin_desc *pindesc;
+ struct pinctrl_desc *pctrldesc;
+ struct pmic_gpio_pad *pad, *pads;
+ struct pmic_gpio_state *state;
+ int ret, npins, i;
+ u32 res[2];
+
+ ret = of_property_read_u32_array(dev->of_node, "reg", res, 2);
+ if (ret < 0) {
+ dev_err(dev, "missing base address and/or range");
+ return ret;
+ }
+
+ npins = res[1] / PMIC_GPIO_ADDRESS_RANGE;
+
+ if (!npins)
+ return -EINVAL;
+
+ BUG_ON(npins > ARRAY_SIZE(pmic_gpio_groups));
+
+ state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, state);
+
+ state->dev = &pdev->dev;
+ state->map = dev_get_regmap(dev->parent, NULL);
+
+ pindesc = devm_kcalloc(dev, npins, sizeof(*pindesc), GFP_KERNEL);
+ if (!pindesc)
+ return -ENOMEM;
+
+ pads = devm_kcalloc(dev, npins, sizeof(*pads), GFP_KERNEL);
+ if (!pads)
+ return -ENOMEM;
+
+ pctrldesc = devm_kzalloc(dev, sizeof(*pctrldesc), GFP_KERNEL);
+ if (!pctrldesc)
+ return -ENOMEM;
+
+ pctrldesc->pctlops = &pmic_gpio_pinctrl_ops;
+ pctrldesc->pmxops = &pmic_gpio_pinmux_ops;
+ pctrldesc->confops = &pmic_gpio_pinconf_ops;
+ pctrldesc->owner = THIS_MODULE;
+ pctrldesc->name = dev_name(dev);
+ pctrldesc->pins = pindesc;
+ pctrldesc->npins = npins;
+
+ for (i = 0; i < npins; i++, pindesc++) {
+ pad = &pads[i];
+ pindesc->drv_data = pad;
+ pindesc->number = i;
+ pindesc->name = pmic_gpio_groups[i];
+
+ pad->irq = platform_get_irq(pdev, i);
+ if (pad->irq < 0)
+ return pad->irq;
+
+ pad->base = res[0] + i * PMIC_GPIO_ADDRESS_RANGE;
+
+ ret = pmic_gpio_populate(state, pad);
+ if (ret < 0)
+ return ret;
+ }
+
+ state->chip = pmic_gpio_gpio_template;
+ state->chip.dev = dev;
+ state->chip.base = -1;
+ state->chip.ngpio = npins;
+ state->chip.label = dev_name(dev);
+ state->chip.of_gpio_n_cells = 2;
+ state->chip.can_sleep = false;
+
+ state->ctrl = pinctrl_register(pctrldesc, dev, state);
+ if (!state->ctrl)
+ return -ENODEV;
+
+ ret = gpiochip_add(&state->chip);
+ if (ret) {
+ dev_err(state->dev, "can't add gpio chip\n");
+ goto err_chip;
+ }
+
+ ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins);
+ if (ret) {
+ dev_err(dev, "failed to add pin range\n");
+ goto err_range;
+ }
+
+ return 0;
+
+err_range:
+ gpiochip_remove(&state->chip);
+err_chip:
+ pinctrl_unregister(state->ctrl);
+ return ret;
+}
+
+static int pmic_gpio_remove(struct platform_device *pdev)
+{
+ struct pmic_gpio_state *state = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = gpiochip_remove(&state->chip);
+ if (ret < 0)
+ return ret;
+
+ pinctrl_unregister(state->ctrl);
+ return 0;
+}
+
+static const struct of_device_id pmic_gpio_of_match[] = {
+ { .compatible = "qcom,pm8941-gpio" }, /* 36 GPIO's */
+ { .compatible = "qcom,pma8084-gpio" }, /* 22 GPIO's */
+ { },
+};
+
+MODULE_DEVICE_TABLE(of, pmic_gpio_of_match);
+
+static struct platform_driver pmic_gpio_driver = {
+ .driver = {
+ .name = "qcom-spmi-gpio",
+ .of_match_table = pmic_gpio_of_match,
+ },
+ .probe = pmic_gpio_probe,
+ .remove = pmic_gpio_remove,
+};
+
+module_platform_driver(pmic_gpio_driver);
+
+MODULE_AUTHOR("Ivan T. Ivanov <iivanov@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Qualcomm SPMI PMIC GPIO pin control driver");
+MODULE_ALIAS("platform:qcom-spmi-gpio");
+MODULE_LICENSE("GPL v2");
--
1.9.1
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