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authorChiYuan Huang <cy_huang@richtek.com>2022-08-10 04:55:41 +0200
committerLee Jones <lee@kernel.org>2022-09-28 17:09:50 +0200
commit4e4627e1aefdbf3a7f7ae85dc5ca8a583e30c87e (patch)
treecc5af692094257d8403724b5a4a96fb72180b4ef
parentmfd: core: Delete corresponding OF node entries from list on MFD removal (diff)
downloadlinux-4e4627e1aefdbf3a7f7ae85dc5ca8a583e30c87e.tar.xz
linux-4e4627e1aefdbf3a7f7ae85dc5ca8a583e30c87e.zip
mfd: rt5120: Add Richtek PMIC support
Add Richtek RT5120 PMIC I2C driver. Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/1660100142-32493-3-git-send-email-u0084500@gmail.com
-rw-r--r--drivers/mfd/Kconfig12
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/rt5120.c124
3 files changed, 137 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 4d2f0324aee1..8b93856de432 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1175,6 +1175,18 @@ config MFD_RT5033
sub-devices like charger, fuel gauge, flash LED, current source,
LDO and Buck.
+config MFD_RT5120
+ tristate "Richtek RT5120 Power Management IC"
+ depends on I2C
+ select MFD_CORE
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ help
+ The enables support for Richtek RT5120 PMIC. It includes four high
+ efficiency buck converters and one LDO voltage regulator. The device
+ is targeted at providing the CPU voltage, memory, I/O and peripheral
+ power rails in home entertainment devices.
+
config MFD_RC5T583
bool "Ricoh RC5T583 Power Management system device"
depends on I2C=y
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index bcfb8d3e4f59..7ed3ef4a698c 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -242,6 +242,7 @@ obj-$(CONFIG_MFD_HI655X_PMIC) += hi655x-pmic.o
obj-$(CONFIG_MFD_DLN2) += dln2.o
obj-$(CONFIG_MFD_RT4831) += rt4831.o
obj-$(CONFIG_MFD_RT5033) += rt5033.o
+obj-$(CONFIG_MFD_RT5120) += rt5120.o
obj-$(CONFIG_MFD_SKY81452) += sky81452.o
obj-$(CONFIG_INTEL_SOC_PMIC) += intel_soc_pmic_crc.o
diff --git a/drivers/mfd/rt5120.c b/drivers/mfd/rt5120.c
new file mode 100644
index 000000000000..8046e383bc92
--- /dev/null
+++ b/drivers/mfd/rt5120.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ * Author: ChiYuan Huang <cy_huang@richtek.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/regmap.h>
+
+#define RT5120_REG_INTENABLE 0x1D
+#define RT5120_REG_INTSTAT 0x1E
+#define RT5120_REG_FZCMODE 0x44
+
+#define RT5120_INT_HOTDIE 0
+#define RT5120_INT_PWRKEY_REL 5
+#define RT5120_INT_PWRKEY_PRESS 6
+
+static const struct regmap_range rt5120_rd_yes_ranges[] = {
+ regmap_reg_range(0x03, 0x13),
+ regmap_reg_range(0x1c, 0x20),
+ regmap_reg_range(0x44, 0x44),
+};
+
+static const struct regmap_range rt5120_wr_yes_ranges[] = {
+ regmap_reg_range(0x06, 0x13),
+ regmap_reg_range(0x1c, 0x20),
+ regmap_reg_range(0x44, 0x44),
+};
+
+static const struct regmap_access_table rt5120_rd_table = {
+ .yes_ranges = rt5120_rd_yes_ranges,
+ .n_yes_ranges = ARRAY_SIZE(rt5120_rd_yes_ranges),
+};
+
+static const struct regmap_access_table rt5120_wr_table = {
+ .yes_ranges = rt5120_wr_yes_ranges,
+ .n_yes_ranges = ARRAY_SIZE(rt5120_wr_yes_ranges),
+};
+
+static const struct regmap_config rt5120_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RT5120_REG_FZCMODE,
+
+ .wr_table = &rt5120_wr_table,
+ .rd_table = &rt5120_rd_table,
+};
+
+static const struct regmap_irq rt5120_irqs[] = {
+ REGMAP_IRQ_REG_LINE(RT5120_INT_HOTDIE, 8),
+ REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_REL, 8),
+ REGMAP_IRQ_REG_LINE(RT5120_INT_PWRKEY_PRESS, 8),
+};
+
+static const struct regmap_irq_chip rt5120_irq_chip = {
+ .name = "rt5120-pmic",
+ .status_base = RT5120_REG_INTSTAT,
+ .mask_base = RT5120_REG_INTENABLE,
+ .ack_base = RT5120_REG_INTSTAT,
+ .mask_invert = true,
+ .use_ack = true,
+ .num_regs = 1,
+ .irqs = rt5120_irqs,
+ .num_irqs = ARRAY_SIZE(rt5120_irqs),
+};
+
+static const struct resource rt5120_regulator_resources[] = {
+ DEFINE_RES_IRQ(RT5120_INT_HOTDIE),
+};
+
+static const struct resource rt5120_pwrkey_resources[] = {
+ DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_PRESS, "pwrkey-press"),
+ DEFINE_RES_IRQ_NAMED(RT5120_INT_PWRKEY_REL, "pwrkey-release"),
+};
+
+static const struct mfd_cell rt5120_devs[] = {
+ MFD_CELL_RES("rt5120-regulator", rt5120_regulator_resources),
+ MFD_CELL_OF("rt5120-pwrkey", rt5120_pwrkey_resources, NULL, 0, 0, "richtek,rt5120-pwrkey"),
+};
+
+static int rt5120_probe(struct i2c_client *i2c)
+{
+ struct device *dev = &i2c->dev;
+ struct regmap *regmap;
+ struct regmap_irq_chip_data *irq_data;
+ int ret;
+
+ regmap = devm_regmap_init_i2c(i2c, &rt5120_regmap_config);
+ if (IS_ERR(regmap))
+ return dev_err_probe(dev, PTR_ERR(regmap),
+ "Failed to init regmap\n");
+
+ ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq, IRQF_ONESHOT, 0,
+ &rt5120_irq_chip, &irq_data);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to add IRQ chip\n");
+
+ return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, rt5120_devs,
+ ARRAY_SIZE(rt5120_devs), NULL, 0,
+ regmap_irq_get_domain(irq_data));
+}
+
+static const struct of_device_id rt5120_device_match_table[] = {
+ { .compatible = "richtek,rt5120" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, rt5120_device_match_table);
+
+static struct i2c_driver rt5120_driver = {
+ .driver = {
+ .name = "rt5120",
+ .of_match_table = rt5120_device_match_table,
+ },
+ .probe_new = rt5120_probe,
+};
+module_i2c_driver(rt5120_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("Richtek RT5120 I2C driver");
+MODULE_LICENSE("GPL v2");