diff options
Diffstat (limited to 'drivers/mfd/sec-core.c')
| -rw-r--r-- | drivers/mfd/sec-core.c | 568 |
1 files changed, 568 insertions, 0 deletions
diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c new file mode 100644 index 000000000..95473ff9b --- /dev/null +++ b/drivers/mfd/sec-core.c @@ -0,0 +1,568 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Copyright (c) 2012 Samsung Electronics Co., Ltd +// http://www.samsung.com + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#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/s2mpa01.h> +#include <linux/mfd/samsung/s2mps11.h> +#include <linux/mfd/samsung/s2mps13.h> +#include <linux/mfd/samsung/s2mps14.h> +#include <linux/mfd/samsung/s2mps15.h> +#include <linux/mfd/samsung/s2mpu02.h> +#include <linux/mfd/samsung/s5m8763.h> +#include <linux/mfd/samsung/s5m8767.h> +#include <linux/regmap.h> + +static const struct mfd_cell s5m8751_devs[] = { + { .name = "s5m8751-pmic", }, + { .name = "s5m-charger", }, + { .name = "s5m8751-codec", }, +}; + +static const struct mfd_cell s5m8763_devs[] = { + { .name = "s5m8763-pmic", }, + { .name = "s5m-rtc", }, + { .name = "s5m-charger", }, +}; + +static const struct mfd_cell s5m8767_devs[] = { + { .name = "s5m8767-pmic", }, + { .name = "s5m-rtc", }, + { + .name = "s5m8767-clk", + .of_compatible = "samsung,s5m8767-clk", + }, +}; + +static const struct mfd_cell s2mps11_devs[] = { + { .name = "s2mps11-regulator", }, + { .name = "s2mps14-rtc", }, + { + .name = "s2mps11-clk", + .of_compatible = "samsung,s2mps11-clk", + }, +}; + +static const struct mfd_cell s2mps13_devs[] = { + { .name = "s2mps13-regulator", }, + { .name = "s2mps13-rtc", }, + { + .name = "s2mps13-clk", + .of_compatible = "samsung,s2mps13-clk", + }, +}; + +static const struct mfd_cell s2mps14_devs[] = { + { .name = "s2mps14-regulator", }, + { .name = "s2mps14-rtc", }, + { + .name = "s2mps14-clk", + .of_compatible = "samsung,s2mps14-clk", + }, +}; + +static const struct mfd_cell s2mps15_devs[] = { + { .name = "s2mps15-regulator", }, + { .name = "s2mps15-rtc", }, + { + .name = "s2mps13-clk", + .of_compatible = "samsung,s2mps13-clk", + }, +}; + +static const struct mfd_cell s2mpa01_devs[] = { + { .name = "s2mpa01-pmic", }, + { .name = "s2mps14-rtc", }, +}; + +static const struct mfd_cell s2mpu02_devs[] = { + { .name = "s2mpu02-regulator", }, +}; + +#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,s2mps13-pmic", + .data = (void *)S2MPS13X, + }, { + .compatible = "samsung,s2mps14-pmic", + .data = (void *)S2MPS14X, + }, { + .compatible = "samsung,s2mps15-pmic", + .data = (void *)S2MPS15X, + }, { + .compatible = "samsung,s2mpa01-pmic", + .data = (void *)S2MPA01, + }, { + .compatible = "samsung,s2mpu02-pmic", + .data = (void *)S2MPU02, + }, { + /* Sentinel */ + }, +}; +MODULE_DEVICE_TABLE(of, sec_dt_match); +#endif + +static bool s2mpa01_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case S2MPA01_REG_INT1M: + case S2MPA01_REG_INT2M: + case S2MPA01_REG_INT3M: + return false; + default: + return true; + } +} + +static bool s2mps11_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case S2MPS11_REG_INT1M: + case S2MPS11_REG_INT2M: + case S2MPS11_REG_INT3M: + return false; + default: + return true; + } +} + +static bool s2mpu02_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case S2MPU02_REG_INT1M: + case S2MPU02_REG_INT2M: + case S2MPU02_REG_INT3M: + return false; + default: + return true; + } +} + +static bool s5m8763_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case S5M8763_REG_IRQM1: + case S5M8763_REG_IRQM2: + case S5M8763_REG_IRQM3: + case S5M8763_REG_IRQM4: + return false; + default: + return true; + } +} + +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 const struct regmap_config s2mps13_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S2MPS13_REG_LDODSCH5, + .volatile_reg = s2mps11_volatile, + .cache_type = REGCACHE_FLAT, +}; + +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 s2mps15_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S2MPS15_REG_LDODSCH4, + .volatile_reg = s2mps11_volatile, + .cache_type = REGCACHE_FLAT, +}; + +static const struct regmap_config s2mpu02_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .max_register = S2MPU02_REG_DVSDATA, + .volatile_reg = s2mpu02_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, +}; + +static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic) +{ + unsigned int val; + + /* For each device type, the REG_ID is always the first register */ + if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val)) + dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val); +} + +static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic) +{ + int err; + + if (sec_pmic->device_type != S2MPS13X) + return; + + if (sec_pmic->pdata->disable_wrstbi) { + /* + * If WRSTBI pin is pulled down this feature must be disabled + * because each Suspend to RAM will trigger buck voltage reset + * to default values. + */ + err = regmap_update_bits(sec_pmic->regmap_pmic, + S2MPS13_REG_WRSTBI, + S2MPS13_REG_WRSTBI_MASK, 0x0); + if (err) + dev_warn(sec_pmic->dev, + "Cannot initialize WRSTBI config: %d\n", + err); + } +} + +#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) + 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. + */ + + pd->manual_poweroff = of_property_read_bool(dev->of_node, + "samsung,s2mps11-acokb-ground"); + pd->disable_wrstbi = of_property_read_bool(dev->of_node, + "samsung,s2mps11-wrstbi-ground"); + 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 = dev_get_platdata(&i2c->dev); + const struct regmap_config *regmap; + const struct mfd_cell *sec_devs; + struct sec_pmic_dev *sec_pmic; + unsigned long device_type; + int ret, num_sec_devs; + + sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev), + GFP_KERNEL); + if (sec_pmic == NULL) + return -ENOMEM; + + i2c_set_clientdata(i2c, sec_pmic); + sec_pmic->dev = &i2c->dev; + sec_pmic->i2c = i2c; + sec_pmic->irq = i2c->irq; + 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->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 S2MPS13X: + regmap = &s2mps13_regmap_config; + break; + case S2MPS14X: + regmap = &s2mps14_regmap_config; + break; + case S2MPS15X: + regmap = &s2mps15_regmap_config; + break; + case S5M8763X: + regmap = &s5m8763_regmap_config; + break; + case S5M8767X: + regmap = &s5m8767_regmap_config; + break; + case S2MPU02: + regmap = &s2mpu02_regmap_config; + break; + default: + regmap = &sec_regmap_config; + break; + } + + 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; + } + + if (pdata && pdata->cfg_pmic_irq) + pdata->cfg_pmic_irq(); + + sec_irq_init(sec_pmic); + + pm_runtime_set_active(sec_pmic->dev); + + switch (sec_pmic->device_type) { + case S5M8751X: + sec_devs = s5m8751_devs; + num_sec_devs = ARRAY_SIZE(s5m8751_devs); + break; + case S5M8763X: + sec_devs = s5m8763_devs; + num_sec_devs = ARRAY_SIZE(s5m8763_devs); + break; + case S5M8767X: + sec_devs = s5m8767_devs; + num_sec_devs = ARRAY_SIZE(s5m8767_devs); + break; + case S2MPA01: + sec_devs = s2mpa01_devs; + num_sec_devs = ARRAY_SIZE(s2mpa01_devs); + break; + case S2MPS11X: + sec_devs = s2mps11_devs; + num_sec_devs = ARRAY_SIZE(s2mps11_devs); + break; + case S2MPS13X: + sec_devs = s2mps13_devs; + num_sec_devs = ARRAY_SIZE(s2mps13_devs); + break; + case S2MPS14X: + sec_devs = s2mps14_devs; + num_sec_devs = ARRAY_SIZE(s2mps14_devs); + break; + case S2MPS15X: + sec_devs = s2mps15_devs; + num_sec_devs = ARRAY_SIZE(s2mps15_devs); + break; + case S2MPU02: + sec_devs = s2mpu02_devs; + num_sec_devs = ARRAY_SIZE(s2mpu02_devs); + break; + default: + dev_err(&i2c->dev, "Unsupported device type (%lu)\n", + sec_pmic->device_type); + return -ENODEV; + } + ret = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs, + NULL, 0, NULL); + if (ret) + return ret; + + device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup); + sec_pmic_configure(sec_pmic); + sec_pmic_dump_rev(sec_pmic); + + return ret; +} + +static void sec_pmic_shutdown(struct i2c_client *i2c) +{ + struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); + unsigned int reg, mask; + + if (!sec_pmic->pdata->manual_poweroff) + return; + + switch (sec_pmic->device_type) { + case S2MPS11X: + reg = S2MPS11_REG_CTRL1; + mask = S2MPS11_CTRL1_PWRHOLD_MASK; + break; + default: + /* + * Currently only one board with S2MPS11 needs this, so just + * ignore the rest. + */ + dev_warn(sec_pmic->dev, + "Unsupported device %lu for manual power off\n", + sec_pmic->device_type); + return; + } + + regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0); +} + +#ifdef CONFIG_PM_SLEEP +static int sec_pmic_suspend(struct device *dev) +{ + struct i2c_client *i2c = to_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 = to_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 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, sec_pmic_id); + +static struct i2c_driver sec_pmic_driver = { + .driver = { + .name = "sec_pmic", + .pm = &sec_pmic_pm_ops, + .of_match_table = of_match_ptr(sec_dt_match), + }, + .probe = sec_pmic_probe, + .shutdown = sec_pmic_shutdown, + .id_table = sec_pmic_id, +}; + +static int __init sec_pmic_init(void) +{ + return i2c_add_driver(&sec_pmic_driver); +} + +subsys_initcall(sec_pmic_init); + +static void __exit sec_pmic_exit(void) +{ + i2c_del_driver(&sec_pmic_driver); +} +module_exit(sec_pmic_exit); + +MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); +MODULE_DESCRIPTION("Core support for the S5M MFD"); +MODULE_LICENSE("GPL"); |