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

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
......@@ -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
......
......@@ -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
......
/*
* 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");
/*
* 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 */
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment