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mfd: Add support for TPS68470 device

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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@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Rajmohan Mani 2017-07-28 17:30:24 -07:00 committed by Lee Jones
parent d9018976cd
commit 9bbf6a15ce
4 changed files with 222 additions and 0 deletions
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18
drivers/mfd/Kconfig
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@ -1352,6 +1352,24 @@ 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 ACPI && I2C=y
select MFD_CORE
select REGMAP_I2C
select I2C_DESIGNWARE_PLATFORM
help
If you say yes here you get support for the TPS68470 series of
Power Management / LED chips.
These include voltage regulators, LEDs and other features
that are often used in portable devices.
This option is a bool as it provides an ACPI operation
region, which must be available before any of the devices
using this are probed. This option also configures the
designware-i2c driver to be built-in, for the same reason.
config MFD_TI_LP873X
tristate "TI LP873X Power Management IC"
depends on I2C

1
drivers/mfd/Makefile
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@ -84,6 +84,7 @@ 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

106
drivers/mfd/tps68470.c Normal file
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@ -0,0 +1,106 @@
/*
* TPS68470 chip Parent driver
*
* Copyright (C) 2017 Intel Corporation
*
* Authors:
* Rajmohan Mani <rajmohan.mani@intel.com>
* Tianshu Qiu <tian.shu.qiu@intel.com>
* Jian Xu Zheng <jian.xu.zheng@intel.com>
* Yuning Pu <yuning.pu@intel.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/acpi.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps68470.h>
#include <linux/regmap.h>
static const struct mfd_cell tps68470s[] = {
{ .name = "tps68470-gpio" },
{ .name = "tps68470_pmic_opregion" },
};
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 device *dev, struct regmap *regmap)
{
unsigned int version;
int ret;
/* Force software reset */
ret = regmap_write(regmap, TPS68470_REG_RESET, TPS68470_REG_RESET_MASK);
if (ret)
return ret;
ret = regmap_read(regmap, TPS68470_REG_REVID, &version);
if (ret) {
dev_err(dev, "Failed to read revision register: %d\n", ret);
return ret;
}
dev_info(dev, "TPS68470 REVID: 0x%x\n", version);
return 0;
}
static int tps68470_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct regmap *regmap;
int ret;
regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "devm_regmap_init_i2c Error %ld\n",
PTR_ERR(regmap));
return PTR_ERR(regmap);
}
i2c_set_clientdata(client, regmap);
ret = tps68470_chip_init(dev, regmap);
if (ret < 0) {
dev_err(dev, "TPS68470 Init Error %d\n", ret);
return ret;
}
ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, tps68470s,
ARRAY_SIZE(tps68470s), NULL, 0, NULL);
if (ret < 0) {
dev_err(dev, "devm_mfd_add_devices failed: %d\n", ret);
return ret;
}
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 = tps68470_acpi_ids,
},
.probe_new = tps68470_probe,
};
builtin_i2c_driver(tps68470_driver);

97
include/linux/mfd/tps68470.h Normal file
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@ -0,0 +1,97 @@
/*
* 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
/* Register addresses */
#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_GPDI 0x26
#define TPS68470_REG_GPDO 0x27
#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_REG_RESET_MASK GENMASK(7, 0)
#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_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
#endif /* __LINUX_MFD_TPS68470_H */