Commit b1b3ced3 authored by Matti Vaittinen's avatar Matti Vaittinen Committed by Lee Jones
Browse files

mfd: Support ROHM BD9576MUF and BD9573MUF 



Add core support for ROHM BD9576MUF and BD9573MUF PMICs which are
mainly used to power the R-Car series processors.

Signed-off-by: default avatarMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent bd4cefe2

drivers/mfd/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -1989,6 +1989,17 @@ config MFD_ROHM_BD71828 
	  Also included is a Coulomb counter, a real-time clock (RTC), and

	  a 32.768 kHz clock gate.



config MFD_ROHM_BD957XMUF

	tristate "ROHM BD9576MUF and BD9573MUF Power Management ICs"

	depends on I2C=y

	depends on OF

	select REGMAP_I2C

	select MFD_CORE

	help

	  Select this option to get support for the ROHM BD9576MUF and

	  BD9573MUF Power Management ICs. BD9576 and BD9573 are primarily

	  designed to be used to power R-Car series processors.



config MFD_STM32_LPTIMER

	tristate "Support for STM32 Low-Power Timer"

	depends on (ARCH_STM32 && OF) || COMPILE_TEST

drivers/mfd/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -261,6 +261,7 @@ obj-$(CONFIG_RAVE_SP_CORE) += rave-sp.o 
obj-$(CONFIG_MFD_ROHM_BD70528)	+= rohm-bd70528.o

obj-$(CONFIG_MFD_ROHM_BD71828)	+= rohm-bd71828.o

obj-$(CONFIG_MFD_ROHM_BD718XX)	+= rohm-bd718x7.o

obj-$(CONFIG_MFD_ROHM_BD957XMUF)	+= rohm-bd9576.o

obj-$(CONFIG_MFD_STMFX) 	+= stmfx.o

obj-$(CONFIG_MFD_KHADAS_MCU) 	+= khadas-mcu.o

obj-$(CONFIG_MFD_ACER_A500_EC)	+= acer-ec-a500.o

drivers/mfd/rohm-bd9576.c

0 → 100644
+109 −0
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// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * Copyright (C) 2021 ROHM Semiconductors

 *

 * ROHM BD9576MUF and BD9573MUF PMIC driver

 */



#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/ioport.h>

#include <linux/irq.h>

#include <linux/mfd/core.h>

#include <linux/mfd/rohm-bd957x.h>

#include <linux/mfd/rohm-generic.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/regmap.h>

#include <linux/types.h>



static struct mfd_cell bd9573_mfd_cells[] = {

	{ .name = "bd9573-regulator", },

	{ .name = "bd9576-wdt", },

};



static struct mfd_cell bd9576_mfd_cells[] = {

	{ .name = "bd9576-regulator", },

	{ .name = "bd9576-wdt", },

};



static const struct regmap_range volatile_ranges[] = {

	regmap_reg_range(BD957X_REG_SMRB_ASSERT, BD957X_REG_SMRB_ASSERT),

	regmap_reg_range(BD957X_REG_PMIC_INTERNAL_STAT,

			 BD957X_REG_PMIC_INTERNAL_STAT),

	regmap_reg_range(BD957X_REG_INT_THERM_STAT, BD957X_REG_INT_THERM_STAT),

	regmap_reg_range(BD957X_REG_INT_OVP_STAT, BD957X_REG_INT_SYS_STAT),

	regmap_reg_range(BD957X_REG_INT_MAIN_STAT, BD957X_REG_INT_MAIN_STAT),

};



static const struct regmap_access_table volatile_regs = {

	.yes_ranges = &volatile_ranges[0],

	.n_yes_ranges = ARRAY_SIZE(volatile_ranges),

};



static struct regmap_config bd957x_regmap = {

	.reg_bits = 8,

	.val_bits = 8,

	.volatile_table = &volatile_regs,

	.max_register = BD957X_MAX_REGISTER,

	.cache_type = REGCACHE_RBTREE,

};



static int bd957x_i2c_probe(struct i2c_client *i2c,

			     const struct i2c_device_id *id)

{

	int ret;

	struct regmap *regmap;

	struct mfd_cell *cells;

	int num_cells;

	unsigned long chip_type;



	chip_type = (unsigned long)of_device_get_match_data(&i2c->dev);



	switch (chip_type) {

	case ROHM_CHIP_TYPE_BD9576:

		cells = bd9576_mfd_cells;

		num_cells = ARRAY_SIZE(bd9576_mfd_cells);

		break;

	case ROHM_CHIP_TYPE_BD9573:

		cells = bd9573_mfd_cells;

		num_cells = ARRAY_SIZE(bd9573_mfd_cells);

		break;

	default:

		dev_err(&i2c->dev, "Unknown device type");

		return -EINVAL;

	}



	regmap = devm_regmap_init_i2c(i2c, &bd957x_regmap);

	if (IS_ERR(regmap)) {

		dev_err(&i2c->dev, "Failed to initialize Regmap\n");

		return PTR_ERR(regmap);

	}



	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, cells,

				   num_cells, NULL, 0, NULL);

	if (ret)

		dev_err(&i2c->dev, "Failed to create subdevices\n");



	return ret;

}



static const struct of_device_id bd957x_of_match[] = {

	{ .compatible = "rohm,bd9576", .data = (void *)ROHM_CHIP_TYPE_BD9576, },

	{ .compatible = "rohm,bd9573", .data = (void *)ROHM_CHIP_TYPE_BD9573, },

	{ },

};

MODULE_DEVICE_TABLE(of, bd957x_of_match);



static struct i2c_driver bd957x_drv = {

	.driver = {

		.name = "rohm-bd957x",

		.of_match_table = bd957x_of_match,

	},

	.probe = &bd957x_i2c_probe,

};

module_i2c_driver(bd957x_drv);



MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");

MODULE_DESCRIPTION("ROHM BD9576MUF and BD9573MUF Power Management IC driver");

MODULE_LICENSE("GPL");

include/linux/mfd/rohm-bd957x.h

0 → 100644
+59 −0
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/* SPDX-License-Identifier: GPL-2.0-or-later */

/* Copyright (C) 2021 ROHM Semiconductors */



#ifndef __LINUX_MFD_BD957X_H__

#define __LINUX_MFD_BD957X_H__



enum {

	BD957X_VD50,

	BD957X_VD18,

	BD957X_VDDDR,

	BD957X_VD10,

	BD957X_VOUTL1,

	BD957X_VOUTS1,

};



#define BD957X_REG_SMRB_ASSERT		0x15

#define BD957X_REG_PMIC_INTERNAL_STAT	0x20

#define BD957X_REG_INT_THERM_STAT	0x23

#define BD957X_REG_INT_THERM_MASK	0x24

#define BD957X_REG_INT_OVP_STAT		0x25

#define BD957X_REG_INT_SCP_STAT		0x26

#define BD957X_REG_INT_OCP_STAT		0x27

#define BD957X_REG_INT_OVD_STAT		0x28

#define BD957X_REG_INT_UVD_STAT		0x29

#define BD957X_REG_INT_UVP_STAT		0x2a

#define BD957X_REG_INT_SYS_STAT		0x2b

#define BD957X_REG_INT_SYS_MASK		0x2c

#define BD957X_REG_INT_MAIN_STAT	0x30

#define BD957X_REG_INT_MAIN_MASK	0x31



#define BD957X_REG_WDT_CONF		0x16



#define BD957X_REG_POW_TRIGGER1		0x41

#define BD957X_REG_POW_TRIGGER2		0x42

#define BD957X_REG_POW_TRIGGER3		0x43

#define BD957X_REG_POW_TRIGGER4		0x44

#define BD957X_REG_POW_TRIGGERL1	0x45

#define BD957X_REG_POW_TRIGGERS1	0x46



#define BD957X_REGULATOR_EN_MASK	0xff

#define BD957X_REGULATOR_DIS_VAL	0xff



#define BD957X_VSEL_REG_MASK		0xff



#define BD957X_MASK_VOUT1_TUNE		0x87

#define BD957X_MASK_VOUT2_TUNE		0x87

#define BD957X_MASK_VOUT3_TUNE		0x1f

#define BD957X_MASK_VOUT4_TUNE		0x1f

#define BD957X_MASK_VOUTL1_TUNE		0x87



#define BD957X_REG_VOUT1_TUNE		0x50

#define BD957X_REG_VOUT2_TUNE		0x53

#define BD957X_REG_VOUT3_TUNE		0x56

#define BD957X_REG_VOUT4_TUNE		0x59

#define BD957X_REG_VOUTL1_TUNE		0x5c



#define BD957X_MAX_REGISTER		0x61



#endif

include/linux/mfd/rohm-generic.h

+2 −0
Original line number Diff line number Diff line
@@ -14,6 +14,8 @@ enum rohm_chip_type { 
	ROHM_CHIP_TYPE_BD71828,

	ROHM_CHIP_TYPE_BD9571,

	ROHM_CHIP_TYPE_BD9574,

	ROHM_CHIP_TYPE_BD9576,

	ROHM_CHIP_TYPE_BD9573,

	ROHM_CHIP_TYPE_AMOUNT

};