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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: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Matti Vaittinen 2021-03-10 10:06:05 +02:00 committed by Lee Jones
parent bd4cefe20e
commit b1b3ced389
5 changed files with 182 additions and 0 deletions
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11
drivers/mfd/Kconfig
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@ -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

1
drivers/mfd/Makefile
View File

@ -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

109
drivers/mfd/rohm-bd9576.c Normal file
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@ -0,0 +1,109 @@
// 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");

59
include/linux/mfd/rohm-bd957x.h Normal file
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@ -0,0 +1,59 @@
/* 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

2
include/linux/mfd/rohm-generic.h
View File

@ -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
};