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    SubjectRe: [PATCH v3 2/2] mfd: lp873x: Add lp873x PMIC support
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    On Friday 13 May 2016 09:18 AM, Keerthy wrote:
    > The LP873X chip is a power management IC for Portable Navigation Systems
    > and Tablet Computing devices. It contains the following components:
    >
    > - Regulators.
    > - Configurable General Purpose Output Signals(GPO).
    >
    > PMIC interacts with the main processor through i2c. PMIC has
    > couple of LDOs(Linear Regulators), couple of BUCKs (Step-Down DC-DC
    > Converter Cores) and GPOs(General Purpose Output Signals).

    Hi Lee Jones,

    I fixed your comments on v2 and posted this version last week.

    Regards,
    Keerthy

    >
    > Signed-off-by: Keerthy <j-keerthy@ti.com>
    > ---
    >
    > Changes in v3:
    >
    > * Reordered the probe code.
    > * Fixed Typo in Kconfig description.
    > * Removed unused member from struct lp873x.
    >
    > drivers/mfd/Kconfig | 14 +++
    > drivers/mfd/Makefile | 2 +
    > drivers/mfd/lp873x.c | 96 +++++++++++++++++
    > include/linux/mfd/lp873x.h | 264 +++++++++++++++++++++++++++++++++++++++++++++
    > 4 files changed, 376 insertions(+)
    > create mode 100644 drivers/mfd/lp873x.c
    > create mode 100644 include/linux/mfd/lp873x.h
    >
    > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
    > index eea61e3..a7e48e7 100644
    > --- a/drivers/mfd/Kconfig
    > +++ b/drivers/mfd/Kconfig
    > @@ -1185,6 +1185,20 @@ config MFD_TPS65217
    > This driver can also be built as a module. If so, the module
    > will be called tps65217.
    >
    > +config MFD_LP873X
    > + tristate "TI LP873X Power Management IC"
    > + depends on I2C
    > + select MFD_CORE
    > + select REGMAP_I2C
    > + help
    > + If you say yes here then you get support for the LP873X series of
    > + power management integrated circuits(PMIC).
    > + These include voltage regulators, Thermal protection, Configurable
    > + general purpose outputs(GPO) that are used in portable devices.
    > +
    > + This driver can also be built as a module. If so, the module
    > + will be called lp873x.
    > +
    > config MFD_TPS65218
    > tristate "TI TPS65218 Power Management chips"
    > depends on I2C
    > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
    > index 5eaa6465d..617c688 100644
    > --- a/drivers/mfd/Makefile
    > +++ b/drivers/mfd/Makefile
    > @@ -22,6 +22,8 @@ obj-$(CONFIG_HTC_EGPIO) += htc-egpio.o
    > obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o
    > obj-$(CONFIG_HTC_I2CPLD) += htc-i2cpld.o
    >
    > +obj-$(CONFIG_MFD_LP873X) += lp873x.o
    > +
    > obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o
    > obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
    > obj-$(CONFIG_MFD_TI_AM335X_TSCADC) += ti_am335x_tscadc.o
    > diff --git a/drivers/mfd/lp873x.c b/drivers/mfd/lp873x.c
    > new file mode 100644
    > index 0000000..ba49d56
    > --- /dev/null
    > +++ b/drivers/mfd/lp873x.c
    > @@ -0,0 +1,96 @@
    > +/*
    > + * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
    > + *
    > + * 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/interrupt.h>
    > +#include <linux/mfd/core.h>
    > +#include <linux/module.h>
    > +#include <linux/of_device.h>
    > +#include <linux/regmap.h>
    > +
    > +#include <linux/mfd/lp873x.h>
    > +
    > +static const struct regmap_config lp873x_regmap_config = {
    > + .reg_bits = 8,
    > + .val_bits = 8,
    > + .max_register = LP873X_REG_MAX,
    > +};
    > +
    > +static const struct mfd_cell lp873x_cells[] = {
    > + { .name = "lp873x-regulator", },
    > +};
    > +
    > +static int lp873x_probe(struct i2c_client *client,
    > + const struct i2c_device_id *ids)
    > +{
    > + struct lp873x *lp873;
    > + int ret;
    > + unsigned int otpid;
    > +
    > + lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL);
    > + if (!lp873)
    > + return -ENOMEM;
    > +
    > + lp873->dev = &client->dev;
    > +
    > + lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config);
    > + if (IS_ERR(lp873->regmap)) {
    > + ret = PTR_ERR(lp873->regmap);
    > + dev_err(lp873->dev, "Failed to initialize register map: %d\n",
    > + ret);
    > + return ret;
    > + }
    > +
    > + mutex_init(&lp873->lp873_lock);
    > +
    > + ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid);
    > + if (ret) {
    > + dev_err(lp873->dev, "Failed to read OTP ID\n");
    > + return ret;
    > + }
    > +
    > + lp873->rev = otpid & LP873X_OTP_REV_OTP_ID;
    > + i2c_set_clientdata(client, lp873);
    > + ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells,
    > + ARRAY_SIZE(lp873x_cells), NULL, 0, NULL);
    > +
    > + return ret;
    > +}
    > +
    > +static const struct of_device_id of_lp873x_match_table[] = {
    > + { .compatible = "ti,lp8733", },
    > + { .compatible = "ti,lp8732", },
    > + {}
    > +};
    > +MODULE_DEVICE_TABLE(of, of_lp873x_match_table);
    > +
    > +static const struct i2c_device_id lp873x_id_table[] = {
    > + { "lp873x", LP873X },
    > + { "lp8732", LP873X },
    > + { "lp8733", LP873X },
    > + { },
    > +};
    > +MODULE_DEVICE_TABLE(i2c, lp873x_id_table);
    > +
    > +static struct i2c_driver lp873x_driver = {
    > + .driver = {
    > + .name = "lp873x",
    > + .of_match_table = of_lp873x_match_table,
    > + },
    > + .probe = lp873x_probe,
    > + .id_table = lp873x_id_table,
    > +};
    > +module_i2c_driver(lp873x_driver);
    > +
    > +MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
    > +MODULE_DESCRIPTION("LP873X chip family multi-function driver");
    > +MODULE_LICENSE("GPL v2");
    > diff --git a/include/linux/mfd/lp873x.h b/include/linux/mfd/lp873x.h
    > new file mode 100644
    > index 0000000..fb7ec55
    > --- /dev/null
    > +++ b/include/linux/mfd/lp873x.h
    > @@ -0,0 +1,264 @@
    > +/*
    > + * Functions to access LP873X power management chip.
    > + *
    > + * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
    > + *
    > + * 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_LP873X_H
    > +#define __LINUX_MFD_LP873X_H
    > +
    > +#include <linux/i2c.h>
    > +#include <linux/regulator/driver.h>
    > +#include <linux/regulator/machine.h>
    > +
    > +/* LP873x chip id list */
    > +#define LP873X 0x00
    > +
    > +/* All register addresses */
    > +#define LP873X_REG_DEV_REV 0X00
    > +#define LP873X_REG_OTP_REV 0X01
    > +#define LP873X_REG_BUCK0_CTRL_1 0X02
    > +#define LP873X_REG_BUCK0_CTRL_2 0X03
    > +#define LP873X_REG_BUCK1_CTRL_1 0X04
    > +#define LP873X_REG_BUCK1_CTRL_2 0X05
    > +#define LP873X_REG_BUCK0_VOUT 0X06
    > +#define LP873X_REG_BUCK1_VOUT 0X07
    > +#define LP873X_REG_LDO0_CTRL 0X08
    > +#define LP873X_REG_LDO1_CTRL 0X09
    > +#define LP873X_REG_LDO0_VOUT 0X0A
    > +#define LP873X_REG_LDO1_VOUT 0X0B
    > +#define LP873X_REG_BUCK0_DELAY 0X0C
    > +#define LP873X_REG_BUCK1_DELAY 0X0D
    > +#define LP873X_REG_LDO0_DELAY 0X0E
    > +#define LP873X_REG_LDO1_DELAY 0X0F
    > +#define LP873X_REG_GPO_DELAY 0X10
    > +#define LP873X_REG_GPO2_DELAY 0X11
    > +#define LP873X_REG_GPO_CTRL 0X12
    > +#define LP873X_REG_CONFIG 0X13
    > +#define LP873X_REG_PLL_CTRL 0X14
    > +#define LP873X_REG_PGOOD_CTRL1 0X15
    > +#define LP873X_REG_PGOOD_CTRL2 0X16
    > +#define LP873X_REG_PG_FAULT 0X17
    > +#define LP873X_REG_RESET 0X18
    > +#define LP873X_REG_INT_TOP_1 0X19
    > +#define LP873X_REG_INT_TOP_2 0X1A
    > +#define LP873X_REG_INT_BUCK 0X1B
    > +#define LP873X_REG_INT_LDO 0X1C
    > +#define LP873X_REG_TOP_STAT 0X1D
    > +#define LP873X_REG_BUCK_STAT 0X1E
    > +#define LP873X_REG_LDO_STAT 0x1F
    > +#define LP873X_REG_TOP_MASK_1 0x20
    > +#define LP873X_REG_TOP_MASK_2 0x21
    > +#define LP873X_REG_BUCK_MASK 0x22
    > +#define LP873X_REG_LDO_MASK 0x23
    > +#define LP873X_REG_SEL_I_LOAD 0x24
    > +#define LP873X_REG_I_LOAD_2 0x25
    > +#define LP873X_REG_I_LOAD_1 0x26
    > +
    > +#define LP873X_REG_MAX LP873X_REG_I_LOAD_1
    > +
    > +/* Register field definitions */
    > +#define LP873X_DEV_REV_DEV_ID 0xC0
    > +#define LP873X_DEV_REV_ALL_LAYER 0x30
    > +#define LP873X_DEV_REV_METAL_LAYER 0x0F
    > +
    > +#define LP873X_OTP_REV_OTP_ID 0xFF
    > +
    > +#define LP873X_BUCK0_CTRL_1_BUCK0_FPWM BIT(3)
    > +#define LP873X_BUCK0_CTRL_1_BUCK0_RDIS_EN BIT(2)
    > +#define LP873X_BUCK0_CTRL_1_BUCK0_EN_PIN_CTRL BIT(1)
    > +#define LP873X_BUCK0_CTRL_1_BUCK0_EN BIT(0)
    > +
    > +#define LP873X_BUCK0_CTRL_2_BUCK0_ILIM 0x38
    > +#define LP873X_BUCK0_CTRL_2_BUCK0_SLEW_RATE 0x07
    > +
    > +#define LP873X_BUCK1_CTRL_1_BUCK1_FPWM BIT(3)
    > +#define LP873X_BUCK1_CTRL_1_BUCK1_RDIS_EN BIT(2)
    > +#define LP873X_BUCK1_CTRL_1_BUCK1_EN_PIN_CTRL BIT(1)
    > +#define LP873X_BUCK1_CTRL_1_BUCK1_EN BIT(0)
    > +
    > +#define LP873X_BUCK1_CTRL_2_BUCK1_ILIM 0x38
    > +#define LP873X_BUCK1_CTRL_2_BUCK1_SLEW_RATE 0x07
    > +
    > +#define LP873X_BUCK0_VOUT_BUCK0_VSET 0xFF
    > +
    > +#define LP873X_BUCK1_VOUT_BUCK1_VSET 0xFF
    > +
    > +#define LP873X_LDO0_CTRL_LDO0_RDIS_EN BIT(2)
    > +#define LP873X_LDO0_CTRL_LDO0_EN_PIN_CTRL BIT(1)
    > +#define LP873X_LDO0_CTRL_LDO0_EN BIT(0)
    > +
    > +#define LP873X_LDO1_CTRL_LDO1_RDIS_EN BIT(2)
    > +#define LP873X_LDO1_CTRL_LDO1_EN_PIN_CTRL BIT(1)
    > +#define LP873X_LDO1_CTRL_LDO1_EN BIT(0)
    > +
    > +#define LP873X_LDO0_VOUT_LDO0_VSET 0x1F
    > +
    > +#define LP873X_LDO1_VOUT_LDO1_VSET 0x1F
    > +
    > +#define LP873X_BUCK0_DELAY_BUCK0_SD_DELAY 0xF0
    > +#define LP873X_BUCK0_DELAY_BUCK0_SU_DELAY 0x0F
    > +
    > +#define LP873X_BUCK1_DELAY_BUCK1_SD_DELAY 0xF0
    > +#define LP873X_BUCK1_DELAY_BUCK1_SU_DELAY 0x0F
    > +
    > +#define LP873X_LDO0_DELAY_LDO0_SD_DELAY 0xF0
    > +#define LP873X_LDO0_DELAY_LDO0_SU_DELAY 0x0F
    > +
    > +#define LP873X_LDO1_DELAY_LDO1_SD_DELAY 0xF0
    > +#define LP873X_LDO1_DELAY_LDO1_SU_DELAY 0x0F
    > +
    > +#define LP873X_GPO_DELAY_GPO_SD_DELAY 0xF0
    > +#define LP873X_GPO_DELAY_GPO_SU_DELAY 0x0F
    > +
    > +#define LP873X_GPO2_DELAY_GPO2_SD_DELAY 0xF0
    > +#define LP873X_GPO2_DELAY_GPO2_SU_DELAY 0x0F
    > +
    > +#define LP873X_GPO_CTRL_GPO2_OD BIT(6)
    > +#define LP873X_GPO_CTRL_GPO2_EN_PIN_CTRL BIT(5)
    > +#define LP873X_GPO_CTRL_GPO2_EN BIT(4)
    > +#define LP873X_GPO_CTRL_GPO_OD BIT(2)
    > +#define LP873X_GPO_CTRL_GPO_EN_PIN_CTRL BIT(1)
    > +#define LP873X_GPO_CTRL_GPO_EN BIT(0)
    > +
    > +#define LP873X_CONFIG_SU_DELAY_SEL BIT(6)
    > +#define LP873X_CONFIG_SD_DELAY_SEL BIT(5)
    > +#define LP873X_CONFIG_CLKIN_PIN_SEL BIT(4)
    > +#define LP873X_CONFIG_CLKIN_PD BIT(3)
    > +#define LP873X_CONFIG_EN_PD BIT(2)
    > +#define LP873X_CONFIG_TDIE_WARN_LEVEL BIT(1)
    > +#define LP873X_EN_SPREAD_SPEC BIT(0)
    > +
    > +#define LP873X_PLL_CTRL_EN_PLL BIT(6)
    > +#define LP873X_EXT_CLK_FREQ 0x1F
    > +
    > +#define LP873X_PGOOD_CTRL1_PGOOD_POL BIT(7)
    > +#define LP873X_PGOOD_CTRL1_PGOOD_OD BIT(6)
    > +#define LP873X_PGOOD_CTRL1_PGOOD_WINDOW_LDO BIT(5)
    > +#define LP873X_PGOOD_CTRL1_PGOOD_WINDOWN_BUCK BIT(4)
    > +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO1 BIT(3)
    > +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_LDO0 BIT(2)
    > +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK1 BIT(1)
    > +#define LP873X_PGOOD_CTRL1_PGOOD_EN_PGOOD_BUCK0 BIT(0)
    > +
    > +#define LP873X_PGOOD_CTRL2_EN_PGOOD_TWARN BIT(2)
    > +#define LP873X_PGOOD_CTRL2_EN_PG_FAULT_GATE BIT(1)
    > +#define LP873X_PGOOD_CTRL2_PGOOD_MODE BIT(0)
    > +
    > +#define LP873X_PG_FAULT_PG_FAULT_LDO1 BIT(3)
    > +#define LP873X_PG_FAULT_PG_FAULT_LDO0 BIT(2)
    > +#define LP873X_PG_FAULT_PG_FAULT_BUCK1 BIT(1)
    > +#define LP873X_PG_FAULT_PG_FAULT_BUCK0 BIT(0)
    > +
    > +#define LP873X_RESET_SW_RESET BIT(0)
    > +
    > +#define LP873X_INT_TOP_1_PGOOD_INT BIT(7)
    > +#define LP873X_INT_TOP_1_LDO_INT BIT(6)
    > +#define LP873X_INT_TOP_1_BUCK_INT BIT(5)
    > +#define LP873X_INT_TOP_1_SYNC_CLK_INT BIT(4)
    > +#define LP873X_INT_TOP_1_TDIE_SD_INT BIT(3)
    > +#define LP873X_INT_TOP_1_TDIE_WARN_INT BIT(2)
    > +#define LP873X_INT_TOP_1_OVP_INT BIT(1)
    > +#define LP873X_INT_TOP_1_I_MEAS_INT BIT(0)
    > +
    > +#define LP873X_INT_TOP_2_RESET_REG_INT BIT(0)
    > +
    > +#define LP873X_INT_BUCK_BUCK1_PG_INT BIT(6)
    > +#define LP873X_INT_BUCK_BUCK1_SC_INT BIT(5)
    > +#define LP873X_INT_BUCK_BUCK1_ILIM_INT BIT(4)
    > +#define LP873X_INT_BUCK_BUCK0_PG_INT BIT(2)
    > +#define LP873X_INT_BUCK_BUCK0_SC_INT BIT(1)
    > +#define LP873X_INT_BUCK_BUCK0_ILIM_INT BIT(0)
    > +
    > +#define LP873X_INT_LDO_LDO1_PG_INT BIT(6)
    > +#define LP873X_INT_LDO_LDO1_SC_INT BIT(5)
    > +#define LP873X_INT_LDO_LDO1_ILIM_INT BIT(4)
    > +#define LP873X_INT_LDO_LDO0_PG_INT BIT(2)
    > +#define LP873X_INT_LDO_LDO0_SC_INT BIT(1)
    > +#define LP873X_INT_LDO_LDO0_ILIM_INT BIT(0)
    > +
    > +#define LP873X_TOP_STAT_PGOOD_STAT BIT(7)
    > +#define LP873X_TOP_STAT_SYNC_CLK_STAT BIT(4)
    > +#define LP873X_TOP_STAT_TDIE_SD_STAT BIT(3)
    > +#define LP873X_TOP_STAT_TDIE_WARN_STAT BIT(2)
    > +#define LP873X_TOP_STAT_OVP_STAT BIT(1)
    > +
    > +#define LP873X_BUCK_STAT_BUCK1_STAT BIT(7)
    > +#define LP873X_BUCK_STAT_BUCK1_PG_STAT BIT(6)
    > +#define LP873X_BUCK_STAT_BUCK1_ILIM_STAT BIT(4)
    > +#define LP873X_BUCK_STAT_BUCK0_STAT BIT(3)
    > +#define LP873X_BUCK_STAT_BUCK0_PG_STAT BIT(2)
    > +#define LP873X_BUCK_STAT_BUCK0_ILIM_STAT BIT(0)
    > +
    > +#define LP873X_LDO_STAT_LDO1_STAT BIT(7)
    > +#define LP873X_LDO_STAT_LDO1_PG_STAT BIT(6)
    > +#define LP873X_LDO_STAT_LDO1_ILIM_STAT BIT(4)
    > +#define LP873X_LDO_STAT_LDO0_STAT BIT(3)
    > +#define LP873X_LDO_STAT_LDO0_PG_STAT BIT(2)
    > +#define LP873X_LDO_STAT_LDO0_ILIM_STAT BIT(0)
    > +
    > +#define LP873X_TOP_MASK_1_PGOOD_INT_MASK BIT(7)
    > +#define LP873X_TOP_MASK_1_SYNC_CLK_MASK BIT(4)
    > +#define LP873X_TOP_MASK_1_TDIE_WARN_MASK BIT(2)
    > +#define LP873X_TOP_MASK_1_I_MEAS_MASK BIT(0)
    > +
    > +#define LP873X_TOP_MASK_2_RESET_REG_MASK BIT(0)
    > +
    > +#define LP873X_BUCK_MASK_BUCK1_PGF_MASK BIT(7)
    > +#define LP873X_BUCK_MASK_BUCK1_PGR_MASK BIT(6)
    > +#define LP873X_BUCK_MASK_BUCK1_ILIM_MASK BIT(4)
    > +#define LP873X_BUCK_MASK_BUCK0_PGF_MASK BIT(3)
    > +#define LP873X_BUCK_MASK_BUCK0_PGR_MASK BIT(2)
    > +#define LP873X_BUCK_MASK_BUCK0_ILIM_MASK BIT(0)
    > +
    > +#define LP873X_LDO_MASK_LDO1_PGF_MASK BIT(7)
    > +#define LP873X_LDO_MASK_LDO1_PGR_MASK BIT(6)
    > +#define LP873X_LDO_MASK_LDO1_ILIM_MASK BIT(4)
    > +#define LP873X_LDO_MASK_LDO0_PGF_MASK BIT(3)
    > +#define LP873X_LDO_MASK_LDO0_PGR_MASK BIT(2)
    > +#define LP873X_LDO_MASK_LDO0_ILIM_MASK BIT(0)
    > +
    > +#define LP873X_SEL_I_LOAD_CURRENT_BUCK_SELECT BIT(0)
    > +
    > +#define LP873X_I_LOAD_2_BUCK_LOAD_CURRENT BIT(0)
    > +
    > +#define LP873X_I_LOAD_1_BUCK_LOAD_CURRENT 0xFF
    > +
    > +#define LP873X_MAX_REG_ID LP873X_LDO_1
    > +
    > +/* Number of step-down converters available */
    > +#define LP873X_NUM_BUCK 2
    > +/* Number of LDO voltage regulators available */
    > +#define LP873X_NUM_LDO 2
    > +/* Number of total regulators available */
    > +#define LP873X_NUM_REGULATOR (LP873X_NUM_BUCK + LP873X_NUM_LDO)
    > +
    > +enum lp873x_regulator_id {
    > + /* BUCK's */
    > + LP873X_BUCK_0,
    > + LP873X_BUCK_1,
    > + /* LDOs */
    > + LP873X_LDO_0,
    > + LP873X_LDO_1,
    > +};
    > +
    > +/**
    > + * struct lp873x - state holder for the lp873x driver
    > + * Device data may be used to access the LP873X chip
    > + */
    > +struct lp873x {
    > + struct device *dev;
    > + u8 rev;
    > + struct mutex lp873_lock; /* lock guarding the data structure */
    > + struct regmap *regmap;
    > +};
    > +#endif /* __LINUX_MFD_LP873X_H */
    >

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