diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/mfd/rt5120.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/mfd/rt5120.c b/drivers/mfd/rt5120.c new file mode 100644 index 0000000000..58d9a124d7 --- /dev/null +++ b/drivers/mfd/rt5120.c @@ -0,0 +1,123 @@ +// 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, + .unmask_base = RT5120_REG_INTENABLE, + .ack_base = RT5120_REG_INTSTAT, + .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 = 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"); |