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

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 4d2f032..8b93856 100644 (file)
--- 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 bcfb8d3..7ed3ef4 100644 (file)
--- 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 (file)
index 0000000..8046e38
--- /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");