The TPS68470 device is an advanced power management
unit that powers a Compact Camera Module (CCM),
generates clocks for image sensors, drives a dual
LED for Flash and incorporates two LED drivers for
general purpose indicators.
This patch adds support for TPS68470 mfd device.
Signed-off-by: Rajmohan Mani <rajmohan.mani@xxxxxxxxx>
---
drivers/mfd/Kconfig | 12 +++
drivers/mfd/Makefile | 1 +
drivers/mfd/tps68470.c | 227 +++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/tps68470.h | 167 +++++++++++++++++++++++++++++++
4 files changed, 407 insertions(+)
create mode 100644 drivers/mfd/tps68470.c
create mode 100644 include/linux/mfd/tps68470.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3eb5c93..c5e51bc 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1311,6 +1311,18 @@ config MFD_TPS65217
This driver can also be built as a module. If so, the module
will be called tps65217.
+config MFD_TPS68470
+ bool "TI TPS68470 Power Management / LED chips"
+ depends on I2C
+ select MFD_CORE
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the TPS68470 series of
+ Power Management / LED chips.
+
+ These include voltage regulators, led and other features
+ that are often used in portable devices.
+
config MFD_TI_LP873X
tristate "TI LP873X Power Management IC"
depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index c16bf1e..6dd2b94 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -82,6 +82,7 @@ obj-$(CONFIG_MFD_TPS65910) += tps65910.o
obj-$(CONFIG_MFD_TPS65912) += tps65912-core.o
obj-$(CONFIG_MFD_TPS65912_I2C) += tps65912-i2c.o
obj-$(CONFIG_MFD_TPS65912_SPI) += tps65912-spi.o
+obj-$(CONFIG_MFD_TPS68470) += tps68470.o
obj-$(CONFIG_MFD_TPS80031) += tps80031.o
obj-$(CONFIG_MENELAUS) += menelaus.o
diff --git a/drivers/mfd/tps68470.c b/drivers/mfd/tps68470.c
new file mode 100644
index 0000000..ca174fb
--- /dev/null
+++ b/drivers/mfd/tps68470.c
@@ -0,0 +1,227 @@
+/*
+ * TPS68470 chip family multi-function driver
+ *
+ * Copyright (C) 2017 Intel Corporation
+ * Authors:
+ * Rajmohan Mani <rajmohan.mani@xxxxxxxxx>
+ * Tianshu Qiu <tian.shu.qiu@xxxxxxxxx>
+ * Jian Xu Zheng <jian.xu.zheng@xxxxxxxxx>
+ * Yuning Pu <yuning.pu@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps68470.h>
+#include <linux/init.h>
+#include <linux/regmap.h>
+
+static const struct mfd_cell tps68470s[] = {
+ {
+ .name = "tps68470-gpio",
+ },
+ {
+ .name = "tps68470_pmic_opregion",
+ },
+};
+
+/*
+ * tps68470_reg_read: Read a single tps68470 register.
+ *
+ * @tps: Device to read from.
+ * @reg: Register to read.
+ * @val: Contains the value
+ */
+int tps68470_reg_read(struct tps68470 *tps, unsigned int reg,
+ unsigned int *val)
+{
+ int ret;
+
+ mutex_lock(&tps->lock);
+ ret = regmap_read(tps->regmap, reg, val);
+ mutex_unlock(&tps->lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(tps68470_reg_read);
+
+/*
+ * tps68470_reg_write: Write a single tps68470 register.
+ *
+ * @tps68470: Device to write to.
+ * @reg: Register to write to.
+ * @val: Value to write.
+ */
+int tps68470_reg_write(struct tps68470 *tps, unsigned int reg,
+ unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&tps->lock);
+ ret = regmap_write(tps->regmap, reg, val);
+ mutex_unlock(&tps->lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(tps68470_reg_write);
+
+/*
+ * tps68470_update_bits: Modify bits w.r.t mask and val.
+ *
+ * @tps68470: Device to write to.
+ * @reg: Register to read-write to.
+ * @mask: Mask.
+ * @val: Value to write.
+ */
+int tps68470_update_bits(struct tps68470 *tps, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&tps->lock);
+ ret = regmap_update_bits(tps->regmap, reg, mask, val);
+ mutex_unlock(&tps->lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(tps68470_update_bits);
+
+static const struct regmap_config tps68470_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = TPS68470_REG_MAX,
+};
+
+static int tps68470_chip_init(struct tps68470 *tps)
+{
+ unsigned int version;
+ int ret;
+
+ ret = tps68470_reg_read(tps, TPS68470_REG_REVID, &version);
+ if (ret < 0) {
+ dev_err(tps->dev,
+ "Failed to read revision register: %d\n", ret);
+ return ret;
+ }
+
+ dev_info(tps->dev, "TPS68470 REVID: 0x%x\n", version);
+
+ ret = tps68470_reg_write(tps, TPS68470_REG_RESET, 0xff);
+ if (ret < 0)
+ return ret;
+
+ /* FIXME: configure these dynamically */
+ /* Enable Daisy Chain LDO and configure relevant GPIOs as output */
+ ret = tps68470_reg_write(tps, TPS68470_REG_S_I2C_CTL, 2);
+ if (ret < 0)
+ return ret;
+
+ ret = tps68470_reg_write(tps, TPS68470_REG_GPCTL4A, 2);
+ if (ret < 0)
+ return ret;
+
+ ret = tps68470_reg_write(tps, TPS68470_REG_GPCTL5A, 2);
+ if (ret < 0)
+ return ret;
+
+ ret = tps68470_reg_write(tps, TPS68470_REG_GPCTL6A, 2);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * When SDA and SCL are routed to GPIO1 and GPIO2, the mode
+ * for these GPIOs must be configured using their respective
+ * GPCTLxA registers as inputs with no pull-ups.
+ */
+ ret = tps68470_reg_write(tps, TPS68470_REG_GPCTL1A, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = tps68470_reg_write(tps, TPS68470_REG_GPCTL2A, 0);
+ if (ret < 0)
+ return ret;
+
+ /* Enable daisy chain */
+ ret = tps68470_update_bits(tps, TPS68470_REG_S_I2C_CTL, 1, 1);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(TPS68470_DAISY_CHAIN_DELAY_US,
+ TPS68470_DAISY_CHAIN_DELAY_US + 10);
+ return 0;
+}
+
+static int tps68470_probe(struct i2c_client *client)
+{
+ struct tps68470 *tps;
+ int ret;
+
+ tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
+ if (!tps)
+ return -ENOMEM;
+
+ mutex_init(&tps->lock);
+ i2c_set_clientdata(client, tps);
+ tps->dev = &client->dev;
+
+ tps->regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);
+ if (IS_ERR(tps->regmap)) {
+ dev_err(tps->dev, "devm_regmap_init_i2c Error %d\n", ret);
+ return PTR_ERR(tps->regmap);
+ }
+
+ ret = mfd_add_devices(tps->dev, -1, tps68470s,
+ ARRAY_SIZE(tps68470s), NULL, 0, NULL);
+ if (ret < 0) {
+ dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = tps68470_chip_init(tps);
+ if (ret < 0) {
+ dev_err(tps->dev, "TPS68470 Init Error %d\n", ret);
+ goto fail;
+ }
+
+ return 0;
+fail:
+ mutex_lock(&tps->lock);
+ mfd_remove_devices(tps->dev);
+ mutex_unlock(&tps->lock);
+
+ return ret;
+}
+
+static int tps68470_remove(struct i2c_client *client)
+{
+ struct tps68470 *tps = i2c_get_clientdata(client);
+
+ mutex_lock(&tps->lock);
+ mfd_remove_devices(tps->dev);
+ mutex_unlock(&tps->lock);
+
+ return 0;
+}
+
+static const struct acpi_device_id tps68470_acpi_ids[] = {
+ {"INT3472"},
+ {},
+};
+
+MODULE_DEVICE_TABLE(acpi, tps68470_acpi_ids);
+
+static struct i2c_driver tps68470_driver = {
+ .driver = {
+ .name = "tps68470",
+ .acpi_match_table = ACPI_PTR(tps68470_acpi_ids),
+ },
+ .probe_new = tps68470_probe,
+ .remove = tps68470_remove,
+};
+builtin_i2c_driver(tps68470_driver);
diff --git a/include/linux/mfd/tps68470.h b/include/linux/mfd/tps68470.h
new file mode 100644
index 0000000..440c802
--- /dev/null
+++ b/include/linux/mfd/tps68470.h
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2017 Intel Corporation
+ *
+ * Functions to access TPS68470 power management chip.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LINUX_MFD_TPS68470_H
+#define __LINUX_MFD_TPS68470_H
+
+#include <linux/i2c.h>
+
+/* All register addresses */
+#define TPS68470_REG_GSTAT 0x01
+#define TPS68470_REG_VRSTA 0x02
+#define TPS68470_REG_VRSHORT 0x03
+#define TPS68470_REG_INTMASK 0x04
+#define TPS68470_REG_VCOSPEED 0x05
+#define TPS68470_REG_POSTDIV2 0x06
+#define TPS68470_REG_BOOSTDIV 0x07
+#define TPS68470_REG_BUCKDIV 0x08
+#define TPS68470_REG_PLLSWR 0x09
+#define TPS68470_REG_XTALDIV 0x0A
+#define TPS68470_REG_PLLDIV 0x0B
+#define TPS68470_REG_POSTDIV 0x0C
+#define TPS68470_REG_PLLCTL 0x0D
+#define TPS68470_REG_PLLCTL2 0x0E
+#define TPS68470_REG_CLKCFG1 0x0F
+#define TPS68470_REG_CLKCFG2 0x10
+#define TPS68470_REG_GPCTL0A 0x14
+#define TPS68470_REG_GPCTL0B 0x15
+#define TPS68470_REG_GPCTL1A 0x16
+#define TPS68470_REG_GPCTL1B 0x17
+#define TPS68470_REG_GPCTL2A 0x18
+#define TPS68470_REG_GPCTL2B 0x19
+#define TPS68470_REG_GPCTL3A 0x1A
+#define TPS68470_REG_GPCTL3B 0x1B
+#define TPS68470_REG_GPCTL4A 0x1C
+#define TPS68470_REG_GPCTL4B 0x1D
+#define TPS68470_REG_GPCTL5A 0x1E
+#define TPS68470_REG_GPCTL5B 0x1F
+#define TPS68470_REG_GPCTL6A 0x20
+#define TPS68470_REG_GPCTL6B 0x21
+#define TPS68470_REG_SGPO 0x22
+#define TPS68470_REG_PITCTL 0x23
+#define TPS68470_REG_WAKECFG 0x24
+#define TPS68470_REG_IOWAKESTAT 0x25
+#define TPS68470_REG_GPDI 0x26
+#define TPS68470_REG_GPDO 0x27
+#define TPS68470_REG_ILEDCTL 0x28
+#define TPS68470_REG_WLEDSTAT 0x29
+#define TPS68470_REG_VWLEDILIM 0x2A
+#define TPS68470_REG_VWLEDVAL 0x2B
+#define TPS68470_REG_WLEDMAXRER 0x2C
+#define TPS68470_REG_WLEDMAXT 0x2D
+#define TPS68470_REG_WLEDMAXAF 0x2E
+#define TPS68470_REG_WLEDMAXF 0x2F
+#define TPS68470_REG_WLEDTO 0x30
+#define TPS68470_REG_VWLEDCTL 0x31
+#define TPS68470_REG_WLEDTIMER_MSB 0x32
+#define TPS68470_REG_WLEDTIMER_LSB 0x33
+#define TPS68470_REG_WLEDC1 0x34
+#define TPS68470_REG_WLEDC2 0x35
+#define TPS68470_REG_WLEDCTL 0x36
+#define TPS68470_REG_VCMVAL 0x3C
+#define TPS68470_REG_VAUX1VAL 0x3D
+#define TPS68470_REG_VAUX2VAL 0x3E
+#define TPS68470_REG_VIOVAL 0x3F
+#define TPS68470_REG_VSIOVAL 0x40
+#define TPS68470_REG_VAVAL 0x41
+#define TPS68470_REG_VDVAL 0x42
+#define TPS68470_REG_S_I2C_CTL 0x43
+#define TPS68470_REG_VCMCTL 0x44
+#define TPS68470_REG_VAUX1CTL 0x45
+#define TPS68470_REG_VAUX2CTL 0x46
+#define TPS68470_REG_VACTL 0x47
+#define TPS68470_REG_VDCTL 0x48
+#define TPS68470_REG_RESET 0x50
+#define TPS68470_REG_REVID 0xFF
+
+#define TPS68470_REG_MAX TPS68470_REG_REVID
+
+/* Register field definitions */
+
+#define TPS68470_VAVAL_AVOLT_MASK GENMASK(6, 0)
+
+#define TPS68470_VDVAL_DVOLT_MASK GENMASK(5, 0)
+#define TPS68470_VCMVAL_VCVOLT_MASK GENMASK(6, 0)
+#define TPS68470_VIOVAL_IOVOLT_MASK GENMASK(6, 0)
+#define TPS68470_VSIOVAL_IOVOLT_MASK GENMASK(6, 0)
+#define TPS68470_VAUX1VAL_AUX1VOLT_MASK GENMASK(6, 0)
+#define TPS68470_VAUX2VAL_AUX2VOLT_MASK GENMASK(6, 0)
+
+#define TPS68470_VACTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_VDCTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_VCMCTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_S_I2C_CTL_EN_MASK GENMASK(1, 0)
+#define TPS68470_VAUX1CTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_VAUX2CTL_EN_MASK GENMASK(0, 0)
+#define TPS68470_PLL_EN_MASK GENMASK(0, 0)
+
+#define TPS68470_OSC_EXT_CAP_SHIFT 4
+#define TPS68470_OSC_EXT_CAP_DEFAULT 0x05 /* 10pf */
+
+#define TPS68470_CLK_SRC_SHIFT 7
+#define TPS68470_CLK_SRC_GPIO3 0
+#define TPS68470_CLK_SRC_XTAL 1
+
+#define TPS68470_DRV_STR_1MA 0
+#define TPS68470_DRV_STR_2MA 1
+#define TPS68470_DRV_STR_4MA 2
+#define TPS68470_DRV_STR_8MA 3
+#define TPS68470_DRV_STR_A_SHIFT 0
+#define TPS68470_DRV_STR_B_SHIFT 2
+
+#define TPS68470_OUTPUT_XTAL_BUFFERED 1
+#define TPS68470_PLL_OUTPUT_ENABLE 2
+#define TPS68470_PLL_OUTPUT_SS_ENABLE 3
+#define TPS68470_OUTPUT_A_SHIFT 0
+#define TPS68470_OUTPUT_B_SHIFT 2
+
+#define TPS68470_CLKCFG1_MODE_A_MASK GENMASK(1, 0)
+#define TPS68470_CLKCFG1_MODE_B_MASK GENMASK(3, 2)
+
+#define TPS68470_GPIO_CTL_REG_A(x) (TPS68470_REG_GPCTL0A + (x) * 2)
+#define TPS68470_GPIO_CTL_REG_B(x) (TPS68470_REG_GPCTL0B + (x) * 2)
+#define TPS68470_GPIO_MODE_MASK GENMASK(1, 0)
+#define TPS68470_GPIO_MODE_IN 0
+#define TPS68470_GPIO_MODE_IN_PULLUP 1
+#define TPS68470_GPIO_MODE_OUT_CMOS 2
+#define TPS68470_GPIO_MODE_OUT_ODRAIN 3
+
+#define TPS68470_PLL_STARTUP_DELAY_US 1000
+#define TPS68470_DAISY_CHAIN_DELAY_US 3000
+
+/**
+ * struct tps68470 - tps68470 sub-driver chip access routines
+ *
+ * Device data may be used to access the TPS68470 chip
+ */
+
+struct tps68470 {
+ struct device *dev;
+ struct regmap *regmap;
+ /*
+ * Used to synchronize access to tps68470_ operations
+ * and addition and removal of mfd devices
+ */
+ struct mutex lock;
+};
+
+int tps68470_reg_read(struct tps68470 *tps, unsigned int reg,
+ unsigned int *val);
+int tps68470_reg_write(struct tps68470 *tps, unsigned int reg,
+ unsigned int val);
+int tps68470_update_bits(struct tps68470 *tps, unsigned int reg,
+ unsigned int mask, unsigned int val);
+
+#endif /* __LINUX_MFD_TPS68470_H */
--
1.9.1
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