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    Subject[PATCH 06/16] mfd: add TI LMU driver
    Date
    TI LMU(Lighting Management Unit) driver supports lighting devices below.

    LM3532, LM3631, LM3632, LM3633, LM3695 and LM3697.

    LMU devices have common features.
    - I2C interface for accessing device registers
    - Hardware enable pin control
    - Backlight brightness control
    - Max current conversion helper function
    - Notifier for hardware fault monitoring
    - Regulators for LCD display bias

    It contains backlight, HWMON, LED and regulator driver.

    Backlight
    ---------
    It's handled by TI LMU backlight common driver and chip dependent driver.
    Please refer to separate patches for ti-lmu-backlight.

    HWMON
    -----
    LM3633 and LM3697 provide hardware monitoring feature.
    It enables opened or shorted circuit detection.
    After monitoring is done, each device should be re-initialized.
    Notifier is used for this case.
    Please refer to separate patch for ti-lmu-hwmon.

    LED indicator
    -------------
    LM3633 has 6 indicator LEDs. Programmable pattern is also supported.
    Please refer to separate patch for leds-lm3633.

    Regulator
    ---------
    LM3631 has 5 regulators for the display bias.
    LM3632 supports 3 regulators. One consolidated driver enables it.
    Please refer to separate patch for lm363x-regulator.

    Cc: Lee Jones <lee.jones@linaro.org>
    Cc: Jingoo Han <jingoohan1@gmail.com>
    Cc: Guenter Roeck <linux@roeck-us.net>
    Cc: Jean Delvare <jdelvare@suse.com>
    Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
    Cc: Mark Brown <broonie@kernel.org>
    Cc: lm-sensors@lm-sensors.org
    Cc: linux-leds@vger.kernel.org
    Cc: devicetree@vger.kernel.org
    Cc: linux-kernel@vger.kernel.org
    Signed-off-by: Milo Kim <milo.kim@ti.com>
    ---
    drivers/mfd/Kconfig | 12 ++
    drivers/mfd/Makefile | 1 +
    drivers/mfd/ti-lmu.c | 324 ++++++++++++++++++++++++++++++++++++
    include/linux/mfd/ti-lmu-register.h | 277 ++++++++++++++++++++++++++++++
    include/linux/mfd/ti-lmu.h | 81 +++++++++
    5 files changed, 695 insertions(+)
    create mode 100644 drivers/mfd/ti-lmu.c
    create mode 100644 include/linux/mfd/ti-lmu-register.h
    create mode 100644 include/linux/mfd/ti-lmu.h

    diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
    index 99d6367..a53a38e 100644
    --- a/drivers/mfd/Kconfig
    +++ b/drivers/mfd/Kconfig
    @@ -1037,6 +1037,18 @@ config MFD_LP8788
    TI LP8788 PMU supports regulators, battery charger, RTC,
    ADC, backlight driver and current sinks.

    +config MFD_TI_LMU
    + tristate "TI Lighting Management Unit driver"
    + depends on I2C
    + select MFD_CORE
    + select REGMAP_I2C
    + help
    + Say yes here to enable support for TI LMU chips.
    +
    + TI LMU MFD supports LM3532, LM3631, LM3632, LM3633, LM3695 and LM3697.
    + It consists of backlight, hwmon, LED and regulator driver.
    + It provides consistent device controls for lighting functions.
    +
    config MFD_OMAP_USB_HOST
    bool "TI OMAP USBHS core and TLL driver"
    depends on USB_EHCI_HCD_OMAP || USB_OHCI_HCD_OMAP3
    diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
    index a59e3fc..32920f8 100644
    --- a/drivers/mfd/Makefile
    +++ b/drivers/mfd/Makefile
    @@ -110,6 +110,7 @@ obj-$(CONFIG_MFD_AXP20X) += axp20x.o

    obj-$(CONFIG_MFD_LP3943) += lp3943.o
    obj-$(CONFIG_MFD_LP8788) += lp8788.o lp8788-irq.o
    +obj-$(CONFIG_MFD_TI_LMU) += ti-lmu.o

    da9055-objs := da9055-core.o da9055-i2c.o
    obj-$(CONFIG_MFD_DA9055) += da9055.o
    diff --git a/drivers/mfd/ti-lmu.c b/drivers/mfd/ti-lmu.c
    new file mode 100644
    index 0000000..e86a0ea
    --- /dev/null
    +++ b/drivers/mfd/ti-lmu.c
    @@ -0,0 +1,324 @@
    +/*
    + * TI LMU(Lighting Management Unit) Core Driver
    + *
    + * Copyright 2015 Texas Instruments
    + *
    + * Author: Milo Kim <milo.kim@ti.com>
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 as
    + * published by the Free Software Foundation.
    + */
    +
    +#include <linux/delay.h>
    +#include <linux/err.h>
    +#include <linux/gpio.h>
    +#include <linux/i2c.h>
    +#include <linux/kernel.h>
    +#include <linux/mfd/core.h>
    +#include <linux/mfd/ti-lmu.h>
    +#include <linux/mfd/ti-lmu-register.h>
    +#include <linux/module.h>
    +#include <linux/notifier.h>
    +#include <linux/of.h>
    +#include <linux/of_device.h>
    +#include <linux/of_gpio.h>
    +#include <linux/slab.h>
    +
    +#define LMU_IMAX_OFFSET 6
    +
    +enum ti_lmu_id {
    + LM3532,
    + LM3631,
    + LM3632,
    + LM3633,
    + LM3695,
    + LM3697,
    +};
    +
    +struct ti_lmu_data {
    + struct mfd_cell *cells;
    + int num_cells;
    + unsigned int max_register;
    +};
    +
    +int ti_lmu_read_byte(struct ti_lmu *lmu, u8 reg, u8 *read)
    +{
    + int ret;
    + unsigned int val;
    +
    + ret = regmap_read(lmu->regmap, reg, &val);
    + if (ret < 0)
    + return ret;
    +
    + *read = (u8)val;
    + return 0;
    +}
    +EXPORT_SYMBOL_GPL(ti_lmu_read_byte);
    +
    +int ti_lmu_write_byte(struct ti_lmu *lmu, u8 reg, u8 data)
    +{
    + return regmap_write(lmu->regmap, reg, data);
    +}
    +EXPORT_SYMBOL_GPL(ti_lmu_write_byte);
    +
    +int ti_lmu_update_bits(struct ti_lmu *lmu, u8 reg, u8 mask, u8 data)
    +{
    + return regmap_update_bits(lmu->regmap, reg, mask, data);
    +}
    +EXPORT_SYMBOL_GPL(ti_lmu_update_bits);
    +
    +/*
    + * LMU backlight and LED devices use shared max current table.
    + * This function finds appropriate register index and return it.
    + */
    +enum ti_lmu_max_current ti_lmu_get_current_code(u32 imax_microamp)
    +{
    + u8 imax_milliamp = imax_microamp / 1000;
    +
    + const enum ti_lmu_max_current imax_table[] = {
    + LMU_IMAX_6mA, LMU_IMAX_7mA, LMU_IMAX_8mA, LMU_IMAX_9mA,
    + LMU_IMAX_10mA, LMU_IMAX_11mA, LMU_IMAX_12mA, LMU_IMAX_13mA,
    + LMU_IMAX_14mA, LMU_IMAX_15mA, LMU_IMAX_16mA, LMU_IMAX_17mA,
    + LMU_IMAX_18mA, LMU_IMAX_19mA, LMU_IMAX_20mA, LMU_IMAX_21mA,
    + LMU_IMAX_22mA, LMU_IMAX_23mA, LMU_IMAX_24mA, LMU_IMAX_25mA,
    + LMU_IMAX_26mA, LMU_IMAX_27mA, LMU_IMAX_28mA, LMU_IMAX_29mA,
    + };
    +
    + /* Valid range is from 5mA to 30mA */
    + if (imax_milliamp <= 5)
    + return LMU_IMAX_5mA;
    +
    + if (imax_milliamp >= 30)
    + return LMU_IMAX_30mA;
    +
    + return imax_table[imax_milliamp - LMU_IMAX_OFFSET];
    +}
    +EXPORT_SYMBOL_GPL(ti_lmu_get_current_code);
    +
    +static int ti_lmu_enable_hw(struct ti_lmu *lmu, enum ti_lmu_id id)
    +{
    + int ret;
    +
    + if (gpio_is_valid(lmu->en_gpio)) {
    + ret = devm_gpio_request_one(lmu->dev, lmu->en_gpio,
    + GPIOF_OUT_INIT_HIGH, "lmu_hwen");
    + if (ret) {
    + dev_err(lmu->dev, "Can not request enable GPIO: %d\n",
    + ret);
    + return ret;
    + }
    + }
    +
    + /* Delay about 1ms after HW enable pin control */
    + usleep_range(1000, 1500);
    +
    + /* LM3631 has additional power up sequence - enable LCD_EN bit. */
    + if (id == LM3631) {
    + return ti_lmu_update_bits(lmu, LM3631_REG_DEVCTRL,
    + LM3631_LCD_EN_MASK,
    + LM3631_LCD_EN_MASK);
    + }
    +
    + return 0;
    +}
    +
    +static void ti_lmu_disable_hw(struct ti_lmu *lmu)
    +{
    + if (gpio_is_valid(lmu->en_gpio))
    + gpio_set_value(lmu->en_gpio, 0);
    +}
    +
    +static struct mfd_cell lm3532_devices[] = {
    + {
    + .name = "lm3532-backlight",
    + .of_compatible = "ti,lm3532-backlight",
    + },
    +};
    +
    +#define LM363X_REGULATOR(_id) \
    +{ \
    + .name = "lm363x-regulator", \
    + .id = _id, \
    + .of_compatible = "ti,lm363x-regulator", \
    +} \
    +
    +static struct mfd_cell lm3631_devices[] = {
    + /* 5 regulators */
    + LM363X_REGULATOR(LM3631_BOOST),
    + LM363X_REGULATOR(LM3631_LDO_CONT),
    + LM363X_REGULATOR(LM3631_LDO_OREF),
    + LM363X_REGULATOR(LM3631_LDO_POS),
    + LM363X_REGULATOR(LM3631_LDO_NEG),
    + /* Backlight */
    + {
    + .name = "lm3631-backlight",
    + .of_compatible = "ti,lm3631-backlight",
    + },
    +};
    +
    +static struct mfd_cell lm3632_devices[] = {
    + /* 3 regulators */
    + LM363X_REGULATOR(LM3632_BOOST),
    + LM363X_REGULATOR(LM3632_LDO_POS),
    + LM363X_REGULATOR(LM3632_LDO_NEG),
    + /* Backlight */
    + {
    + .name = "lm3632-backlight",
    + .of_compatible = "ti,lm3632-backlight",
    + },
    +};
    +
    +static struct mfd_cell lm3633_devices[] = {
    + /* Backlight */
    + {
    + .name = "lm3633-backlight",
    + .of_compatible = "ti,lm3633-backlight",
    + },
    + /* LED */
    + {
    + .name = "lm3633-leds",
    + .of_compatible = "ti,lm3633-leds",
    + },
    + /* HWMON for opened/shorted circuit detection */
    + {
    + .name = "ti-lmu-hwmon",
    + .of_compatible = "ti,lm3633-hwmon",
    + },
    +};
    +
    +static struct mfd_cell lm3695_devices[] = {
    + {
    + .name = "lm3695-backlight",
    + .of_compatible = "ti,lm3695-backlight",
    + },
    +};
    +
    +static struct mfd_cell lm3697_devices[] = {
    + /* Backlight */
    + {
    + .name = "lm3697-backlight",
    + .of_compatible = "ti,lm3697-backlight",
    + },
    + /* HWMON for opened/shorted circuit detection */
    + {
    + .name = "ti-lmu-hwmon",
    + .of_compatible = "ti,lm3697-hwmon",
    + },
    +};
    +
    +#define TI_LMU_DATA(chip, max_reg) \
    +static const struct ti_lmu_data chip##_data = \
    +{ \
    + .cells = chip##_devices, \
    + .num_cells = ARRAY_SIZE(chip##_devices),\
    + .max_register = max_reg, \
    +} \
    +
    +TI_LMU_DATA(lm3532, LM3532_MAX_REG); /* lm3532_data */
    +TI_LMU_DATA(lm3631, LM3631_MAX_REG); /* lm3631_data */
    +TI_LMU_DATA(lm3632, LM3632_MAX_REG); /* lm3632_data */
    +TI_LMU_DATA(lm3633, LM3633_MAX_REG); /* lm3633_data */
    +TI_LMU_DATA(lm3695, LM3695_MAX_REG); /* lm3695_data */
    +TI_LMU_DATA(lm3697, LM3697_MAX_REG); /* lm3697_data */
    +
    +static const struct of_device_id ti_lmu_of_match[] = {
    + { .compatible = "ti,lm3532", .data = &lm3532_data },
    + { .compatible = "ti,lm3631", .data = &lm3631_data },
    + { .compatible = "ti,lm3632", .data = &lm3632_data },
    + { .compatible = "ti,lm3633", .data = &lm3633_data },
    + { .compatible = "ti,lm3695", .data = &lm3695_data },
    + { .compatible = "ti,lm3697", .data = &lm3697_data },
    + { }
    +};
    +MODULE_DEVICE_TABLE(of, ti_lmu_of_match);
    +
    +static int ti_lmu_probe(struct i2c_client *cl, const struct i2c_device_id *id)
    +{
    + struct device *dev = &cl->dev;
    + const struct of_device_id *match;
    + const struct ti_lmu_data *data;
    + struct regmap_config regmap_cfg;
    + struct ti_lmu *lmu;
    + int ret;
    +
    + match = of_match_device(ti_lmu_of_match, dev);
    + if (!match)
    + return -ENODEV;
    + /*
    + * Get device specific data from of_match table.
    + * This data is defined by using TI_LMU_DATA() macro.
    + */
    + data = (struct ti_lmu_data *)match->data;
    +
    + lmu = devm_kzalloc(dev, sizeof(*lmu), GFP_KERNEL);
    + if (!lmu)
    + return -ENOMEM;
    +
    + lmu->dev = &cl->dev;
    +
    + /* Setup regmap */
    + memset(&regmap_cfg, 0, sizeof(struct regmap_config));
    + regmap_cfg.reg_bits = 8;
    + regmap_cfg.val_bits = 8;
    + regmap_cfg.name = id->name;
    + regmap_cfg.max_register = data->max_register;
    +
    + lmu->regmap = devm_regmap_init_i2c(cl, &regmap_cfg);
    + if (IS_ERR(lmu->regmap))
    + return PTR_ERR(lmu->regmap);
    +
    + /* HW enable pin control and additional power up sequence if required */
    + lmu->en_gpio = of_get_named_gpio(dev->of_node, "enable-gpios", 0);
    + ret = ti_lmu_enable_hw(lmu, id->driver_data);
    + if (ret)
    + return ret;
    +
    + /*
    + * Fault circuit(opened/shorted) can be detected by ti-lmu-hwmon.
    + * After fault detection is done, some devices should re-initialize
    + * configuration. The notifier enables such kind of handling.
    + */
    + BLOCKING_INIT_NOTIFIER_HEAD(&lmu->notifier);
    +
    + i2c_set_clientdata(cl, lmu);
    +
    + return mfd_add_devices(lmu->dev, 0, data->cells,
    + data->num_cells, NULL, 0, NULL);
    +}
    +
    +static int ti_lmu_remove(struct i2c_client *cl)
    +{
    + struct ti_lmu *lmu = i2c_get_clientdata(cl);
    +
    + ti_lmu_disable_hw(lmu);
    + mfd_remove_devices(lmu->dev);
    + return 0;
    +}
    +
    +static const struct i2c_device_id ti_lmu_ids[] = {
    + { "lm3532", LM3532 },
    + { "lm3631", LM3631 },
    + { "lm3632", LM3632 },
    + { "lm3633", LM3633 },
    + { "lm3695", LM3695 },
    + { "lm3697", LM3697 },
    + { }
    +};
    +MODULE_DEVICE_TABLE(i2c, ti_lmu_ids);
    +
    +static struct i2c_driver ti_lmu_driver = {
    + .probe = ti_lmu_probe,
    + .remove = ti_lmu_remove,
    + .driver = {
    + .name = "ti-lmu",
    + .of_match_table = ti_lmu_of_match,
    + },
    + .id_table = ti_lmu_ids,
    +};
    +
    +module_i2c_driver(ti_lmu_driver);
    +
    +MODULE_DESCRIPTION("TI LMU MFD Core Driver");
    +MODULE_AUTHOR("Milo Kim");
    +MODULE_LICENSE("GPL v2");
    diff --git a/include/linux/mfd/ti-lmu-register.h b/include/linux/mfd/ti-lmu-register.h
    new file mode 100644
    index 0000000..39f5771
    --- /dev/null
    +++ b/include/linux/mfd/ti-lmu-register.h
    @@ -0,0 +1,277 @@
    +/*
    + * TI LMU(Lighting Management Unit) Device Register Map
    + *
    + * Copyright 2015 Texas Instruments
    + *
    + * Author: Milo Kim <milo.kim@ti.com>
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 as
    + * published by the Free Software Foundation.
    + */
    +
    +#ifndef __MFD_TI_LMU_REGISTER_H__
    +#define __MFD_TI_LMU_REGISTER_H__
    +
    +#include <linux/mfd/ti-lmu.h>
    +
    +/* LM3532 */
    +#define LM3532_REG_OUTPUT_CFG 0x10
    +#define LM3532_ILED1_CFG_MASK 0x03
    +#define LM3532_ILED2_CFG_MASK 0x0C
    +#define LM3532_ILED3_CFG_MASK 0x30
    +#define LM3532_ILED1_CFG_SHIFT 0
    +#define LM3532_ILED2_CFG_SHIFT 2
    +#define LM3532_ILED3_CFG_SHIFT 4
    +
    +#define LM3532_REG_RAMPUP 0x12
    +#define LM3532_REG_RAMPDN LM3532_REG_RAMPUP
    +#define LM3532_RAMPUP_MASK 0x07
    +#define LM3532_RAMPUP_SHIFT 0
    +#define LM3532_RAMPDN_MASK 0x38
    +#define LM3532_RAMPDN_SHIFT 3
    +
    +#define LM3532_REG_ENABLE 0x1D
    +
    +#define LM3532_REG_PWM_CFG_BASE 0x13
    +#define LM3532_PWM_SEL_A_MASK 0x05 /* zone 0 */
    +#define LM3532_PWM_SEL_B_MASK 0x09 /* zone 1 */
    +#define LM3532_PWM_SEL_C_MASK 0x11 /* zone 2 */
    +#define LM3532_PWM_SEL_A_SHIFT 2
    +#define LM3532_PWM_SEL_B_SHIFT 3
    +#define LM3532_PWM_SEL_C_SHIFT 4
    +
    +#define LM3532_REG_ZONE_CFG_A 0x16
    +#define LM3532_REG_ZONE_CFG_B 0x18
    +#define LM3532_REG_ZONE_CFG_C 0x1A
    +#define LM3532_ZONE_CFG_MASK (BIT(2) | BIT(3) | BIT(4))
    +#define LM3532_ZONE_CFG_SHIFT 2
    +
    +#define LM3532_REG_IMAX_A 0x17
    +#define LM3532_REG_IMAX_B 0x19
    +#define LM3532_REG_IMAX_C 0x1B
    +
    +#define LM3532_REG_BRT_A 0x70 /* zone 0 */
    +#define LM3532_REG_BRT_B 0x76 /* zone 1 */
    +#define LM3532_REG_BRT_C 0x7C /* zone 2 */
    +
    +#define LM3532_MAX_REG 0x7E
    +
    +/* LM3631 */
    +#define LM3631_REG_DEVCTRL 0x00
    +#define LM3631_LCD_EN_MASK BIT(1)
    +#define LM3631_BL_EN_MASK BIT(0)
    +
    +#define LM3631_REG_BRT_LSB 0x01
    +#define LM3631_BRT_LSB_MASK (BIT(0) | BIT(1) | BIT(2))
    +#define LM3631_REG_BRT_MSB 0x02
    +#define LM3631_BRT_MSB_SHIFT 3
    +
    +#define LM3631_REG_BL_CFG 0x06
    +#define LM3631_BL_STRING_MASK BIT(3)
    +#define LM3631_BL_TWO_STRINGS 0
    +#define LM3631_BL_ONE_STRING BIT(3)
    +#define LM3631_MAP_MASK BIT(5)
    +#define LM3631_EXPONENTIAL_MAP 0
    +
    +#define LM3631_REG_BRT_MODE 0x08
    +#define LM3631_EN_SLOPE_MASK BIT(1)
    +#define LM3631_MODE_MASK (BIT(2) | BIT(3))
    +#define LM3631_MODE_I2C 0
    +#define LM3631_MODE_PWM BIT(2)
    +#define LM3631_MODE_COMB1 BIT(3)
    +#define LM3631_MODE_COMB2 (BIT(2) | BIT(3))
    +
    +#define LM3631_REG_SLOPE 0x09
    +#define LM3631_SLOPE_MASK 0xF0
    +#define LM3631_SLOPE_SHIFT 4
    +
    +#define LM3631_REG_LDO_CTRL1 0x0A
    +#define LM3631_EN_OREF_MASK BIT(0)
    +#define LM3631_EN_VNEG_MASK BIT(1)
    +#define LM3631_EN_VPOS_MASK BIT(2)
    +
    +#define LM3631_REG_LDO_CTRL2 0x0B
    +#define LM3631_EN_CONT_MASK BIT(0)
    +
    +#define LM3631_REG_VOUT_CONT 0x0C
    +#define LM3631_VOUT_CONT_MASK (BIT(6) | BIT(7))
    +
    +#define LM3631_REG_VOUT_BOOST 0x0C
    +#define LM3631_REG_VOUT_POS 0x0D
    +#define LM3631_REG_VOUT_NEG 0x0E
    +#define LM3631_REG_VOUT_OREF 0x0F
    +#define LM3631_VOUT_MASK 0x3F
    +
    +#define LM3631_REG_ENTIME_VCONT 0x0B
    +#define LM3631_ENTIME_CONT_MASK 0x70
    +
    +#define LM3631_REG_ENTIME_VOREF 0x0F
    +#define LM3631_REG_ENTIME_VPOS 0x10
    +#define LM3631_REG_ENTIME_VNEG 0x11
    +#define LM3631_ENTIME_MASK 0xF0
    +#define LM3631_ENTIME_SHIFT 4
    +
    +#define LM3631_MAX_REG 0x16
    +
    +/* LM3632 */
    +#define LM3632_REG_CONFIG1 0x02
    +#define LM3632_OVP_MASK (BIT(5) | BIT(6) | BIT(7))
    +#define LM3632_OVP_25V BIT(6)
    +
    +#define LM3632_REG_CONFIG2 0x03
    +#define LM3632_SWFREQ_MASK BIT(7)
    +#define LM3632_SWFREQ_1MHZ BIT(7)
    +
    +#define LM3632_REG_BRT_LSB 0x04
    +#define LM3632_BRT_LSB_MASK (BIT(0) | BIT(1) | BIT(2))
    +#define LM3632_REG_BRT_MSB 0x05
    +#define LM3632_BRT_MSB_SHIFT 3
    +
    +#define LM3632_REG_IO_CTRL 0x09
    +#define LM3632_PWM_MASK BIT(6)
    +#define LM3632_I2C_MODE 0
    +#define LM3632_PWM_MODE BIT(6)
    +
    +#define LM3632_REG_ENABLE 0x0A
    +#define LM3632_BL_EN_MASK BIT(0)
    +#define LM3632_BL_STRING_MASK (BIT(3) | BIT(4))
    +#define LM3632_BL_ONE_STRING BIT(4)
    +#define LM3632_BL_TWO_STRINGS BIT(3)
    +
    +#define LM3632_REG_BIAS_CONFIG 0x0C
    +#define LM3632_EXT_EN_MASK BIT(0)
    +#define LM3632_EN_VNEG_MASK BIT(1)
    +#define LM3632_EN_VPOS_MASK BIT(2)
    +
    +#define LM3632_REG_VOUT_BOOST 0x0D
    +#define LM3632_REG_VOUT_POS 0x0E
    +#define LM3632_REG_VOUT_NEG 0x0F
    +#define LM3632_VOUT_MASK 0x3F
    +
    +#define LM3632_MAX_REG 0x10
    +
    +/* LM3633 */
    +#define LM3633_REG_HVLED_OUTPUT_CFG 0x10
    +
    +#define LM3633_REG_BANK_SEL 0x11
    +
    +#define LM3633_REG_BL0_RAMPUP 0x12
    +#define LM3633_REG_BL0_RAMPDN LM3633_REG_BL0_RAMPUP
    +#define LM3633_REG_BL1_RAMPUP 0x13
    +#define LM3633_REG_BL1_RAMPDN LM3633_REG_BL1_RAMPUP
    +#define LM3633_BL_RAMPUP_MASK 0xF0
    +#define LM3633_BL_RAMPUP_SHIFT 4
    +#define LM3633_BL_RAMPDN_MASK 0x0F
    +#define LM3633_BL_RAMPDN_SHIFT 0
    +
    +#define LM3633_REG_BL_RAMP_CONF 0x1B
    +#define LM3633_BL_RAMP_MASK 0x0F
    +#define LM3633_BL_RAMP_EACH 0x05
    +
    +#define LM3633_REG_PTN0_RAMP 0x1C
    +#define LM3633_REG_PTN1_RAMP 0x1D
    +#define LM3633_PTN_RAMPUP_MASK 0x70
    +#define LM3633_PTN_RAMPUP_SHIFT 4
    +#define LM3633_PTN_RAMPDN_MASK 0x07
    +#define LM3633_PTN_RAMPDN_SHIFT 0
    +
    +#define LM3633_REG_IMAX_HVLED_A 0x20
    +#define LM3633_REG_IMAX_HVLED_B 0x21
    +#define LM3633_REG_IMAX_LVLED_BASE 0x22
    +
    +#define LM3633_REG_BL_FEEDBACK_ENABLE 0x28
    +
    +#define LM3633_REG_ENABLE 0x2B
    +#define LM3633_LED_BANK_OFFSET 2
    +
    +#define LM3633_REG_PATTERN 0x2C
    +
    +#define LM3633_REG_BOOST_CFG 0x2D
    +#define LM3633_BOOST_OVP_MASK (BIT(1) | BIT(2))
    +#define LM3633_BOOST_OVP_40V 0x6
    +
    +#define LM3633_REG_PWM_CFG 0x2F
    +
    +#define LM3633_REG_BRT_HVLED_A_LSB 0x40
    +#define LM3633_REG_BRT_HVLED_A_MSB 0x41
    +#define LM3633_REG_BRT_HVLED_B_LSB 0x42
    +#define LM3633_REG_BRT_HVLED_B_MSB 0x43
    +#define LM3633_BRT_HVLED_LSB_MASK (BIT(0) | BIT(1) | BIT(2))
    +#define LM3633_BRT_HVLED_MSB_SHIFT 3
    +
    +#define LM3633_REG_BRT_LVLED_BASE 0x44
    +
    +#define LM3633_REG_PTN_DELAY 0x50
    +
    +#define LM3633_REG_PTN_LOWTIME 0x51
    +
    +#define LM3633_REG_PTN_HIGHTIME 0x52
    +
    +#define LM3633_REG_PTN_LOWBRT 0x53
    +
    +#define LM3633_REG_PTN_HIGHBRT LM3633_REG_BRT_LVLED_BASE
    +
    +#define LM3633_REG_BL_OPEN_FAULT_STATUS 0xB0
    +
    +#define LM3633_REG_BL_SHORT_FAULT_STATUS 0xB2
    +
    +#define LM3633_REG_MONITOR_ENABLE 0xB4
    +
    +#define LM3633_MAX_REG 0xB4
    +
    +/* LM3695 */
    +#define LM3695_REG_GP 0x10
    +#define LM3695_BL_STRING_MASK BIT(3)
    +#define LM3695_BL_TWO_STRINGS 0
    +#define LM3695_BL_ONE_STRING BIT(3)
    +#define LM3695_BRT_RW_MASK BIT(2)
    +#define LM3695_BL_EN_MASK BIT(0)
    +
    +#define LM3695_REG_BRT_LSB 0x13
    +#define LM3695_BRT_LSB_MASK (BIT(0) | BIT(1) | BIT(2))
    +#define LM3695_REG_BRT_MSB 0x14
    +#define LM3695_BRT_MSB_SHIFT 3
    +
    +#define LM3695_MAX_REG 0x14
    +
    +/* LM3697 */
    +#define LM3697_REG_HVLED_OUTPUT_CFG 0x10
    +
    +#define LM3697_REG_BL0_RAMPUP 0x11
    +#define LM3697_REG_BL0_RAMPDN LM3697_REG_BL0_RAMPUP
    +#define LM3697_REG_BL1_RAMPUP 0x12
    +#define LM3697_REG_BL1_RAMPDN LM3697_REG_BL1_RAMPUP
    +#define LM3697_BL_RAMPUP_MASK 0xF0
    +#define LM3697_BL_RAMPUP_SHIFT 4
    +#define LM3697_BL_RAMPDN_MASK 0x0F
    +#define LM3697_BL_RAMPDN_SHIFT 0
    +
    +#define LM3697_REG_RAMP_CONF 0x14
    +#define LM3697_RAMP_MASK 0x0F
    +#define LM3697_RAMP_EACH 0x05
    +
    +#define LM3697_REG_PWM_CFG 0x1C
    +
    +#define LM3697_REG_IMAX_A 0x17
    +#define LM3697_REG_IMAX_B 0x18
    +
    +#define LM3697_REG_FEEDBACK_ENABLE 0x19
    +
    +#define LM3697_REG_BRT_A_LSB 0x20
    +#define LM3697_REG_BRT_A_MSB 0x21
    +#define LM3697_REG_BRT_B_LSB 0x22
    +#define LM3697_REG_BRT_B_MSB 0x23
    +#define LM3697_BRT_LSB_MASK (BIT(0) | BIT(1) | BIT(2))
    +#define LM3697_BRT_MSB_SHIFT 3
    +
    +#define LM3697_REG_ENABLE 0x24
    +
    +#define LM3697_REG_OPEN_FAULT_STATUS 0xB0
    +
    +#define LM3697_REG_SHORT_FAULT_STATUS 0xB2
    +
    +#define LM3697_REG_MONITOR_ENABLE 0xB4
    +
    +#define LM3697_MAX_REG 0xB4
    +#endif
    diff --git a/include/linux/mfd/ti-lmu.h b/include/linux/mfd/ti-lmu.h
    new file mode 100644
    index 0000000..eeb6b9e
    --- /dev/null
    +++ b/include/linux/mfd/ti-lmu.h
    @@ -0,0 +1,81 @@
    +/*
    + * TI LMU(Lighting Management Unit) Devices
    + *
    + * Copyright 2015 Texas Instruments
    + *
    + * Author: Milo Kim <milo.kim@ti.com>
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 as
    + * published by the Free Software Foundation.
    + */
    +
    +#ifndef __MFD_TI_LMU_H__
    +#define __MFD_TI_LMU_H__
    +
    +#include <linux/gpio.h>
    +#include <linux/regmap.h>
    +
    +/* Notifier event */
    +#define LMU_EVENT_HWMON_DONE 0x01
    +
    +enum ti_lmu_max_current {
    + LMU_IMAX_5mA,
    + LMU_IMAX_6mA,
    + LMU_IMAX_7mA = 0x03,
    + LMU_IMAX_8mA,
    + LMU_IMAX_9mA,
    + LMU_IMAX_10mA = 0x07,
    + LMU_IMAX_11mA,
    + LMU_IMAX_12mA,
    + LMU_IMAX_13mA,
    + LMU_IMAX_14mA,
    + LMU_IMAX_15mA = 0x0D,
    + LMU_IMAX_16mA,
    + LMU_IMAX_17mA,
    + LMU_IMAX_18mA,
    + LMU_IMAX_19mA,
    + LMU_IMAX_20mA = 0x13,
    + LMU_IMAX_21mA,
    + LMU_IMAX_22mA,
    + LMU_IMAX_23mA = 0x17,
    + LMU_IMAX_24mA,
    + LMU_IMAX_25mA,
    + LMU_IMAX_26mA,
    + LMU_IMAX_27mA = 0x1C,
    + LMU_IMAX_28mA,
    + LMU_IMAX_29mA,
    + LMU_IMAX_30mA,
    +};
    +
    +enum lm363x_regulator_id {
    + LM3631_BOOST, /* Boost output */
    + LM3631_LDO_CONT, /* Display panel controller */
    + LM3631_LDO_OREF, /* Gamma reference */
    + LM3631_LDO_POS, /* Positive display bias output */
    + LM3631_LDO_NEG, /* Negative display bias output */
    + LM3632_BOOST, /* Boost output */
    + LM3632_LDO_POS, /* Positive display bias output */
    + LM3632_LDO_NEG, /* Negative display bias output */
    +};
    +
    +/**
    + * struct ti_lmu
    + *
    + * @dev: Parent device pointer
    + * @regmap: Used for i2c communcation on accessing registers
    + * @en_gpio: GPIO for HWEN pin [Optional]
    + * @notifier: Notifier for reporting hwmon event
    + */
    +struct ti_lmu {
    + struct device *dev;
    + struct regmap *regmap;
    + int en_gpio;
    + struct blocking_notifier_head notifier;
    +};
    +
    +int ti_lmu_read_byte(struct ti_lmu *lmu, u8 reg, u8 *read);
    +int ti_lmu_write_byte(struct ti_lmu *lmu, u8 reg, u8 data);
    +int ti_lmu_update_bits(struct ti_lmu *lmu, u8 reg, u8 mask, u8 data);
    +enum ti_lmu_max_current ti_lmu_get_current_code(u32 imax_microamp);
    +#endif
    --
    1.9.1


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