/* * sec-core.c * * Copyright (c) 2012 Samsung Electronics Co., Ltd * http://www.samsung.com * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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", } }; static const struct mfd_cell s2mps11_devs[] = { { .name = "s2mps11-pmic", }, { .name = "s2mps11-clk", } }; #ifdef CONFIG_OF static struct of_device_id sec_dt_match[] = { { .compatible = "samsung,s5m8767-pmic", .data = (void *)S5M8767X, }, { .compatible = "samsung,s2mps11-pmic", .data = (void *)S2MPS11X, }, {}, }; #endif 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 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 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 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 const struct regmap_config sec_rtc_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = SEC_RTC_REG_MAX, }; #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 int 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 (int)match->data; } #endif return (int)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, *regmap_rtc; struct sec_pmic_dev *sec_pmic; int ret; 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; sec_pmic->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 = sec_pmic->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 S2MPS11X: regmap = &s2mps11_regmap_config; /* * The rtc-s5m driver does not support S2MPS11 and there * is no mfd_cell for S2MPS11 RTC device. * However we must pass something to devm_regmap_init_i2c() * so use S5M-like regmap config even though it wouldn't work. */ regmap_rtc = &sec_rtc_regmap_config; break; case S5M8763X: regmap = &s5m8763_regmap_config; regmap_rtc = &sec_rtc_regmap_config; break; case S5M8767X: regmap = &s5m8767_regmap_config; regmap_rtc = &sec_rtc_regmap_config; break; default: regmap = &sec_regmap_config; regmap_rtc = &sec_rtc_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; } sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); i2c_set_clientdata(sec_pmic->rtc, sec_pmic); sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc, regmap_rtc); if (IS_ERR(sec_pmic->regmap_rtc)) { ret = PTR_ERR(sec_pmic->regmap_rtc); dev_err(&i2c->dev, "Failed to allocate RTC 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: ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs, ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL); break; case S5M8763X: ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs, ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL); break; case S5M8767X: ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs, ARRAY_SIZE(s5m8767_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; default: /* If this happens the probe function is problem */ BUG(); } if (ret) goto err; device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup); return ret; err: sec_irq_exit(sec_pmic); i2c_unregister_device(sec_pmic->rtc); return ret; } static int sec_pmic_remove(struct i2c_client *i2c) { struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(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 by RTC Alarm, 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 }, { } }; MODULE_DEVICE_TABLE(i2c, sec_pmic_id); 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, .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 "); MODULE_DESCRIPTION("Core support for the S5M MFD"); MODULE_LICENSE("GPL");