diff options
Diffstat (limited to 'drivers/mfd/sec-core.c')
| -rw-r--r-- | drivers/mfd/sec-core.c | 307 |
1 files changed, 266 insertions, 41 deletions
diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c index 49d361a618d..be06d0abbf1 100644 --- a/drivers/mfd/sec-core.c +++ b/drivers/mfd/sec-core.c @@ -17,16 +17,22 @@ #include <linux/err.h> #include <linux/slab.h> #include <linux/i2c.h> +#include <linux/of.h> +#include <linux/of_irq.h> #include <linux/interrupt.h> #include <linux/pm_runtime.h> #include <linux/mutex.h> #include <linux/mfd/core.h> #include <linux/mfd/samsung/core.h> #include <linux/mfd/samsung/irq.h> -#include <linux/mfd/samsung/rtc.h> +#include <linux/mfd/samsung/s2mpa01.h> +#include <linux/mfd/samsung/s2mps11.h> +#include <linux/mfd/samsung/s2mps14.h> +#include <linux/mfd/samsung/s5m8763.h> +#include <linux/mfd/samsung/s5m8767.h> #include <linux/regmap.h> -static struct mfd_cell s5m8751_devs[] = { +static const struct mfd_cell s5m8751_devs[] = { { .name = "s5m8751-pmic", }, { @@ -36,7 +42,7 @@ static struct mfd_cell s5m8751_devs[] = { }, }; -static struct mfd_cell s5m8763_devs[] = { +static const struct mfd_cell s5m8763_devs[] = { { .name = "s5m8763-pmic", }, { @@ -46,60 +52,206 @@ static struct mfd_cell s5m8763_devs[] = { }, }; -static struct mfd_cell s5m8767_devs[] = { +static const struct mfd_cell s5m8767_devs[] = { { .name = "s5m8767-pmic", }, { .name = "s5m-rtc", - }, + }, { + .name = "s5m8767-clk", + .of_compatible = "samsung,s5m8767-clk", + } }; -static struct mfd_cell s2mps11_devs[] = { +static const struct mfd_cell s2mps11_devs[] = { { .name = "s2mps11-pmic", + }, { + .name = "s2mps11-clk", + .of_compatible = "samsung,s2mps11-clk", + } +}; + +static const struct mfd_cell s2mps14_devs[] = { + { + .name = "s2mps14-pmic", + }, { + .name = "s2mps14-rtc", + }, { + .name = "s2mps14-clk", + .of_compatible = "samsung,s2mps14-clk", + } +}; + +static const struct mfd_cell s2mpa01_devs[] = { + { + .name = "s2mpa01-pmic", }, }; -int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest) -{ - return regmap_read(sec_pmic->regmap, reg, dest); -} -EXPORT_SYMBOL_GPL(sec_reg_read); +#ifdef CONFIG_OF +static const struct of_device_id sec_dt_match[] = { + { .compatible = "samsung,s5m8767-pmic", + .data = (void *)S5M8767X, + }, { + .compatible = "samsung,s2mps11-pmic", + .data = (void *)S2MPS11X, + }, { + .compatible = "samsung,s2mps14-pmic", + .data = (void *)S2MPS14X, + }, { + .compatible = "samsung,s2mpa01-pmic", + .data = (void *)S2MPA01, + }, { + /* Sentinel */ + }, +}; +#endif -int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) +static bool s2mpa01_volatile(struct device *dev, unsigned int reg) { - return regmap_bulk_read(sec_pmic->regmap, reg, buf, count); + switch (reg) { + case S2MPA01_REG_INT1M: + case S2MPA01_REG_INT2M: + case S2MPA01_REG_INT3M: + return false; + default: + return true; + } } -EXPORT_SYMBOL_GPL(sec_bulk_read); -int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value) +static bool s2mps11_volatile(struct device *dev, unsigned int reg) { - return regmap_write(sec_pmic->regmap, reg, value); + switch (reg) { + case S2MPS11_REG_INT1M: + case S2MPS11_REG_INT2M: + case S2MPS11_REG_INT3M: + return false; + default: + return true; + } } -EXPORT_SYMBOL_GPL(sec_reg_write); -int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) +static bool s5m8763_volatile(struct device *dev, unsigned int reg) { - return regmap_raw_write(sec_pmic->regmap, reg, buf, count); + switch (reg) { + case S5M8763_REG_IRQM1: + case S5M8763_REG_IRQM2: + case S5M8763_REG_IRQM3: + case S5M8763_REG_IRQM4: + return false; + default: + return true; + } } -EXPORT_SYMBOL_GPL(sec_bulk_write); -int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask) -{ - return regmap_update_bits(sec_pmic->regmap, reg, mask, val); -} -EXPORT_SYMBOL_GPL(sec_reg_update); +static const struct regmap_config sec_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct regmap_config s2mpa01_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S2MPA01_REG_LDO_OVCB4, + .volatile_reg = s2mpa01_volatile, + .cache_type = REGCACHE_FLAT, +}; + +static const struct regmap_config s2mps11_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S2MPS11_REG_L38CTRL, + .volatile_reg = s2mps11_volatile, + .cache_type = REGCACHE_FLAT, +}; -static struct regmap_config sec_regmap_config = { +static const struct regmap_config s2mps14_regmap_config = { .reg_bits = 8, .val_bits = 8, + + .max_register = S2MPS14_REG_LDODSCH3, + .volatile_reg = s2mps11_volatile, + .cache_type = REGCACHE_FLAT, }; +static const struct regmap_config s5m8763_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S5M8763_REG_LBCNFG2, + .volatile_reg = s5m8763_volatile, + .cache_type = REGCACHE_FLAT, +}; + +static const struct regmap_config s5m8767_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S5M8767_REG_LDO28CTRL, + .volatile_reg = s2mps11_volatile, + .cache_type = REGCACHE_FLAT, +}; + +#ifdef CONFIG_OF +/* + * Only the common platform data elements for s5m8767 are parsed here from the + * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and + * others have to parse their own platform data elements from device tree. + * + * The s5m8767 platform data structure is instantiated here and the drivers for + * the sub-modules need not instantiate another instance while parsing their + * platform data. + */ +static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( + struct device *dev) +{ + struct sec_platform_data *pd; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) { + dev_err(dev, "could not allocate memory for pdata\n"); + return ERR_PTR(-ENOMEM); + } + + /* + * ToDo: the 'wakeup' member in the platform data is more of a linux + * specfic information. Hence, there is no binding for that yet and + * not parsed here. + */ + + return pd; +} +#else +static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( + struct device *dev) +{ + return NULL; +} +#endif + +static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ +#ifdef CONFIG_OF + if (i2c->dev.of_node) { + const struct of_device_id *match; + match = of_match_node(sec_dt_match, i2c->dev.of_node); + return (unsigned long)match->data; + } +#endif + return id->driver_data; +} + static int sec_pmic_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { - struct sec_platform_data *pdata = i2c->dev.platform_data; + struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev); + const struct regmap_config *regmap; struct sec_pmic_dev *sec_pmic; + unsigned long device_type; int ret; sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev), @@ -111,26 +263,53 @@ static int sec_pmic_probe(struct i2c_client *i2c, sec_pmic->dev = &i2c->dev; sec_pmic->i2c = i2c; sec_pmic->irq = i2c->irq; - sec_pmic->type = id->driver_data; - + device_type = sec_i2c_get_driver_data(i2c, id); + + if (sec_pmic->dev->of_node) { + pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev); + if (IS_ERR(pdata)) { + ret = PTR_ERR(pdata); + return ret; + } + pdata->device_type = device_type; + } if (pdata) { sec_pmic->device_type = pdata->device_type; sec_pmic->ono = pdata->ono; sec_pmic->irq_base = pdata->irq_base; sec_pmic->wakeup = pdata->wakeup; + sec_pmic->pdata = pdata; + } + + switch (sec_pmic->device_type) { + case S2MPA01: + regmap = &s2mpa01_regmap_config; + break; + case S2MPS11X: + regmap = &s2mps11_regmap_config; + break; + case S2MPS14X: + regmap = &s2mps14_regmap_config; + break; + case S5M8763X: + regmap = &s5m8763_regmap_config; + break; + case S5M8767X: + regmap = &s5m8767_regmap_config; + break; + default: + regmap = &sec_regmap_config; + break; } - sec_pmic->regmap = devm_regmap_init_i2c(i2c, &sec_regmap_config); - if (IS_ERR(sec_pmic->regmap)) { - ret = PTR_ERR(sec_pmic->regmap); + sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap); + if (IS_ERR(sec_pmic->regmap_pmic)) { + ret = PTR_ERR(sec_pmic->regmap_pmic); dev_err(&i2c->dev, "Failed to allocate register map: %d\n", ret); return ret; } - sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); - i2c_set_clientdata(sec_pmic->rtc, sec_pmic); - if (pdata && pdata->cfg_pmic_irq) pdata->cfg_pmic_irq(); @@ -151,24 +330,32 @@ static int sec_pmic_probe(struct i2c_client *i2c, ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs, ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL); break; + case S2MPA01: + ret = mfd_add_devices(sec_pmic->dev, -1, s2mpa01_devs, + ARRAY_SIZE(s2mpa01_devs), NULL, 0, NULL); + break; case S2MPS11X: ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs, ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL); break; + case S2MPS14X: + ret = mfd_add_devices(sec_pmic->dev, -1, s2mps14_devs, + ARRAY_SIZE(s2mps14_devs), NULL, 0, NULL); + break; default: /* If this happens the probe function is problem */ BUG(); } - if (ret < 0) - goto err; + if (ret) + goto err_mfd; + + device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup); return ret; -err: - mfd_remove_devices(sec_pmic->dev); +err_mfd: sec_irq_exit(sec_pmic); - i2c_unregister_device(sec_pmic->rtc); return ret; } @@ -178,10 +365,46 @@ static int sec_pmic_remove(struct i2c_client *i2c) mfd_remove_devices(sec_pmic->dev); sec_irq_exit(sec_pmic); - i2c_unregister_device(sec_pmic->rtc); return 0; } +#ifdef CONFIG_PM_SLEEP +static int sec_pmic_suspend(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) + enable_irq_wake(sec_pmic->irq); + /* + * PMIC IRQ must be disabled during suspend for RTC alarm + * to work properly. + * When device is woken up from suspend, an + * interrupt occurs before resuming I2C bus controller. + * The interrupt is handled by regmap_irq_thread which tries + * to read RTC registers. This read fails (I2C is still + * suspended) and RTC Alarm interrupt is disabled. + */ + disable_irq(sec_pmic->irq); + + return 0; +} + +static int sec_pmic_resume(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) + disable_irq_wake(sec_pmic->irq); + enable_irq(sec_pmic->irq); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume); + static const struct i2c_device_id sec_pmic_id[] = { { "sec_pmic", 0 }, { } @@ -192,6 +415,8 @@ static struct i2c_driver sec_pmic_driver = { .driver = { .name = "sec_pmic", .owner = THIS_MODULE, + .pm = &sec_pmic_pm_ops, + .of_match_table = of_match_ptr(sec_dt_match), }, .probe = sec_pmic_probe, .remove = sec_pmic_remove, |