Commit dc21c7ad authored by Keerthy's avatar Keerthy Committed by Lee Jones
Browse files

mfd: lp873x: Add lp873x PMIC support 



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).

Signed-off-by: default avatarKeerthy <j-keerthy@ti.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 694d0d0b

drivers/mfd/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -1224,6 +1224,20 @@ config MFD_TPS65217 
	  This driver can also be built as a module.  If so, the module

	  will be called tps65217.



config MFD_TI_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

drivers/mfd/Makefile

+2 −0
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@@ -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_TI_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

drivers/mfd/lp873x.c

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/*

 * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/

 *

 * Author: Keerthy <j-keerthy@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", },

	{ .name = "lp873x-gpio", },

};



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->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", 0 },

	{ },

};

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 Device driver");

MODULE_LICENSE("GPL v2");

include/linux/mfd/lp873x.h

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/*

 * 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

 * @dev: struct device pointer for MFD device

 * @rev: revision of the lp873x

 * @lock: lock guarding the data structure

 * @regmap: register map of the lp873x PMIC

 *

 * Device data may be used to access the LP873X chip

 */

struct lp873x {

	struct device *dev;

	u8 rev;

	struct mutex lock;	/* lock guarding the data structure */

	struct regmap *regmap;

};

#endif /* __LINUX_MFD_LP873X_H */

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