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authorMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>2021-03-10 10:06:05 +0200
committerLee Jones <lee.jones@linaro.org>2021-03-10 10:58:17 +0000
commitb1b3ced389795d2671e88dd3e9e07a48dc9632fc (patch)
treeb7337808458e81abd6b8689e896c293223ee3245 /drivers/mfd
parentbd4cefe20e3ded06ee2a2629a73ecb40a08f4eaf (diff)
downloadlinux-b1b3ced389795d2671e88dd3e9e07a48dc9632fc.tar.bz2
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>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/Kconfig11
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/rohm-bd9576.c109
3 files changed, 121 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index b74efa469e90..f0c9529e7bfd 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -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
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 834f5463af28..d93f6f361fd3 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -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
diff --git a/drivers/mfd/rohm-bd9576.c b/drivers/mfd/rohm-bd9576.c
new file mode 100644
index 000000000000..2dbda1f401e2
--- /dev/null
+++ b/drivers/mfd/rohm-bd9576.c
@@ -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");