Commit 9bbf6a15 authored by Rajmohan Mani's avatar Rajmohan Mani Committed by Lee Jones
Browse files

mfd: Add support for TPS68470 device 



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: default avatarRajmohan Mani <rajmohan.mani@intel.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent d9018976

drivers/mfd/Kconfig

+18 −0
Original line number Diff line number Diff line
@@ -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

drivers/mfd/Makefile

+1 −0
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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

drivers/mfd/tps68470.c

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+106 −0
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/*

 * 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);

include/linux/mfd/tps68470.h

0 → 100644
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/*

 * 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 */

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