From a259f3896a39ec7cbcd5f630a6ec95bdcbc080d2 Mon Sep 17 00:00:00 2001 From: Javier Martinez Canillas Date: Thu, 24 Jul 2014 14:39:24 +0200 Subject: mfd: max77686: Add Maxim 77802 PMIC support Maxim MAX77802 is a power management chip that contains 10 high efficiency Buck regulators, 32 Low-dropout (LDO) regulators used to power up application processors and peripherals, a 2-channel 32kHz clock outputs, a Real-Time-Clock (RTC) and a I2C interface to program the individual regulators, clocks outputs and the RTC. This patch adds support for MAX77802 to the MAX77686 driver and is based on a driver added to the Chrome OS kernel 3.8 by Simon Glass. Signed-off-by: Javier Martinez Canillas Reviewed-by: Krzysztof Kozlowski Signed-off-by: Lee Jones --- drivers/mfd/max77686.c | 197 ++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 170 insertions(+), 27 deletions(-) (limited to 'drivers/mfd/max77686.c') diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c index f2bd699..c653322 100644 --- a/drivers/mfd/max77686.c +++ b/drivers/mfd/max77686.c @@ -1,5 +1,5 @@ /* - * max77686.c - mfd core driver for the Maxim 77686 + * max77686.c - mfd core driver for the Maxim 77686/802 * * Copyright (C) 2012 Samsung Electronics * Chiwoong Byun @@ -43,6 +43,74 @@ static const struct mfd_cell max77686_devs[] = { { .name = "max77686-clk", }, }; +static const struct mfd_cell max77802_devs[] = { + { .name = "max77802-pmic", }, + { .name = "max77802-clk", }, + { .name = "max77802-rtc", }, +}; + +static bool max77802_pmic_is_accessible_reg(struct device *dev, + unsigned int reg) +{ + return (reg >= MAX77802_REG_DEVICE_ID && reg < MAX77802_REG_PMIC_END); +} + +static bool max77802_rtc_is_accessible_reg(struct device *dev, + unsigned int reg) +{ + return (reg >= MAX77802_RTC_INT && reg < MAX77802_RTC_END); +} + +static bool max77802_is_accessible_reg(struct device *dev, unsigned int reg) +{ + return (max77802_pmic_is_accessible_reg(dev, reg) || + max77802_rtc_is_accessible_reg(dev, reg)); +} + +static bool max77802_pmic_is_precious_reg(struct device *dev, unsigned int reg) +{ + return (reg == MAX77802_REG_INTSRC || reg == MAX77802_REG_INT1 || + reg == MAX77802_REG_INT2); +} + +static bool max77802_rtc_is_precious_reg(struct device *dev, unsigned int reg) +{ + return (reg == MAX77802_RTC_INT || + reg == MAX77802_RTC_UPDATE0 || + reg == MAX77802_RTC_UPDATE1); +} + +static bool max77802_is_precious_reg(struct device *dev, unsigned int reg) +{ + return (max77802_pmic_is_precious_reg(dev, reg) || + max77802_rtc_is_precious_reg(dev, reg)); +} + +static bool max77802_pmic_is_volatile_reg(struct device *dev, unsigned int reg) +{ + return (max77802_is_precious_reg(dev, reg) || + reg == MAX77802_REG_STATUS1 || reg == MAX77802_REG_STATUS2 || + reg == MAX77802_REG_PWRON); +} + +static bool max77802_rtc_is_volatile_reg(struct device *dev, unsigned int reg) +{ + return (max77802_rtc_is_precious_reg(dev, reg) || + reg == MAX77802_RTC_SEC || + reg == MAX77802_RTC_MIN || + reg == MAX77802_RTC_HOUR || + reg == MAX77802_RTC_WEEKDAY || + reg == MAX77802_RTC_MONTH || + reg == MAX77802_RTC_YEAR || + reg == MAX77802_RTC_DATE); +} + +static bool max77802_is_volatile_reg(struct device *dev, unsigned int reg) +{ + return (max77802_pmic_is_volatile_reg(dev, reg) || + max77802_rtc_is_volatile_reg(dev, reg)); +} + static struct regmap_config max77686_regmap_config = { .reg_bits = 8, .val_bits = 8, @@ -53,6 +121,17 @@ static struct regmap_config max77686_rtc_regmap_config = { .val_bits = 8, }; +static struct regmap_config max77802_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .writeable_reg = max77802_is_accessible_reg, + .readable_reg = max77802_is_accessible_reg, + .precious_reg = max77802_is_precious_reg, + .volatile_reg = max77802_is_volatile_reg, + .name = "max77802-pmic", + .cache_type = REGCACHE_RBTREE, +}; + static const struct regmap_irq max77686_irqs[] = { /* INT1 interrupts */ { .reg_offset = 0, .mask = MAX77686_INT1_PWRONF_MSK, }, @@ -96,9 +175,34 @@ static const struct regmap_irq_chip max77686_rtc_irq_chip = { .num_irqs = ARRAY_SIZE(max77686_rtc_irqs), }; +static const struct regmap_irq_chip max77802_irq_chip = { + .name = "max77802-pmic", + .status_base = MAX77802_REG_INT1, + .mask_base = MAX77802_REG_INT1MSK, + .num_regs = 2, + .irqs = max77686_irqs, /* same masks as 77686 */ + .num_irqs = ARRAY_SIZE(max77686_irqs), +}; + +static const struct regmap_irq_chip max77802_rtc_irq_chip = { + .name = "max77802-rtc", + .status_base = MAX77802_RTC_INT, + .mask_base = MAX77802_RTC_INTM, + .num_regs = 1, + .irqs = max77686_rtc_irqs, /* same masks as 77686 */ + .num_irqs = ARRAY_SIZE(max77686_rtc_irqs), +}; + static const struct of_device_id max77686_pmic_dt_match[] = { - {.compatible = "maxim,max77686", .data = NULL}, - {}, + { + .compatible = "maxim,max77686", + .data = (void *)TYPE_MAX77686, + }, + { + .compatible = "maxim,max77802", + .data = (void *)TYPE_MAX77802, + }, + { }, }; static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device @@ -119,8 +223,15 @@ static int max77686_i2c_probe(struct i2c_client *i2c, { struct max77686_dev *max77686 = NULL; struct max77686_platform_data *pdata = dev_get_platdata(&i2c->dev); + const struct of_device_id *match; unsigned int data; int ret = 0; + const struct regmap_config *config; + const struct regmap_irq_chip *irq_chip; + const struct regmap_irq_chip *rtc_irq_chip; + struct regmap **rtc_regmap; + const struct mfd_cell *cells; + int n_devs; if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node && !pdata) pdata = max77686_i2c_parse_dt_pdata(&i2c->dev); @@ -135,15 +246,40 @@ static int max77686_i2c_probe(struct i2c_client *i2c, if (!max77686) return -ENOMEM; + if (i2c->dev.of_node) { + match = of_match_node(max77686_pmic_dt_match, i2c->dev.of_node); + if (!match) + return -EINVAL; + + max77686->type = (int)match->data; + } else { + max77686->type = id->driver_data; + } + i2c_set_clientdata(i2c, max77686); max77686->dev = &i2c->dev; max77686->i2c = i2c; - max77686->type = id->driver_data; max77686->wakeup = pdata->wakeup; max77686->irq = i2c->irq; - max77686->regmap = devm_regmap_init_i2c(i2c, &max77686_regmap_config); + if (max77686->type == TYPE_MAX77686) { + config = &max77686_regmap_config; + irq_chip = &max77686_irq_chip; + rtc_irq_chip = &max77686_rtc_irq_chip; + rtc_regmap = &max77686->rtc_regmap; + cells = max77686_devs; + n_devs = ARRAY_SIZE(max77686_devs); + } else { + config = &max77802_regmap_config; + irq_chip = &max77802_irq_chip; + rtc_irq_chip = &max77802_rtc_irq_chip; + rtc_regmap = &max77686->regmap; + cells = max77802_devs; + n_devs = ARRAY_SIZE(max77802_devs); + } + + max77686->regmap = devm_regmap_init_i2c(i2c, config); if (IS_ERR(max77686->regmap)) { ret = PTR_ERR(max77686->regmap); dev_err(max77686->dev, "Failed to allocate register map: %d\n", @@ -158,41 +294,46 @@ static int max77686_i2c_probe(struct i2c_client *i2c, return -ENODEV; } - max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC); - if (!max77686->rtc) { - dev_err(max77686->dev, "Failed to allocate I2C device for RTC\n"); - return -ENODEV; - } - i2c_set_clientdata(max77686->rtc, max77686); - - max77686->rtc_regmap = devm_regmap_init_i2c(max77686->rtc, - &max77686_rtc_regmap_config); - if (IS_ERR(max77686->rtc_regmap)) { - ret = PTR_ERR(max77686->rtc_regmap); - dev_err(max77686->dev, "failed to allocate RTC regmap: %d\n", - ret); - goto err_unregister_i2c; + if (max77686->type == TYPE_MAX77686) { + max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC); + if (!max77686->rtc) { + dev_err(max77686->dev, + "Failed to allocate I2C device for RTC\n"); + return -ENODEV; + } + i2c_set_clientdata(max77686->rtc, max77686); + + max77686->rtc_regmap = + devm_regmap_init_i2c(max77686->rtc, + &max77686_rtc_regmap_config); + if (IS_ERR(max77686->rtc_regmap)) { + ret = PTR_ERR(max77686->rtc_regmap); + dev_err(max77686->dev, + "failed to allocate RTC regmap: %d\n", + ret); + goto err_unregister_i2c; + } } ret = regmap_add_irq_chip(max77686->regmap, max77686->irq, IRQF_TRIGGER_FALLING | IRQF_ONESHOT | - IRQF_SHARED, 0, &max77686_irq_chip, + IRQF_SHARED, 0, irq_chip, &max77686->irq_data); if (ret) { dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret); goto err_unregister_i2c; } - ret = regmap_add_irq_chip(max77686->rtc_regmap, max77686->irq, + + ret = regmap_add_irq_chip(*rtc_regmap, max77686->irq, IRQF_TRIGGER_FALLING | IRQF_ONESHOT | - IRQF_SHARED, 0, &max77686_rtc_irq_chip, + IRQF_SHARED, 0, rtc_irq_chip, &max77686->rtc_irq_data); if (ret) { dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret); goto err_del_irqc; } - ret = mfd_add_devices(max77686->dev, -1, max77686_devs, - ARRAY_SIZE(max77686_devs), NULL, 0, NULL); + ret = mfd_add_devices(max77686->dev, -1, cells, n_devs, NULL, 0, NULL); if (ret < 0) { dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret); goto err_del_rtc_irqc; @@ -205,7 +346,8 @@ err_del_rtc_irqc: err_del_irqc: regmap_del_irq_chip(max77686->irq, max77686->irq_data); err_unregister_i2c: - i2c_unregister_device(max77686->rtc); + if (max77686->type == TYPE_MAX77686) + i2c_unregister_device(max77686->rtc); return ret; } @@ -219,7 +361,8 @@ static int max77686_i2c_remove(struct i2c_client *i2c) regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data); regmap_del_irq_chip(max77686->irq, max77686->irq_data); - i2c_unregister_device(max77686->rtc); + if (max77686->type == TYPE_MAX77686) + i2c_unregister_device(max77686->rtc); return 0; } @@ -294,6 +437,6 @@ static void __exit max77686_i2c_exit(void) } module_exit(max77686_i2c_exit); -MODULE_DESCRIPTION("MAXIM 77686 multi-function core driver"); +MODULE_DESCRIPTION("MAXIM 77686/802 multi-function core driver"); MODULE_AUTHOR("Chiwoong Byun "); MODULE_LICENSE("GPL"); -- cgit v1.1