/* * Core driver for TI TPS6586x PMIC family * * Copyright (c) 2010 CompuLab Ltd. * Mike Rapoport * * Based on da903x.c. * Copyright (C) 2008 Compulab, Ltd. * Mike Rapoport * Copyright (C) 2006-2008 Marvell International Ltd. * Eric Miao * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define TPS6586X_SUPPLYENE 0x14 #define EXITSLREQ_BIT BIT(1) #define SLEEP_MODE_BIT BIT(3) /* interrupt control registers */ #define TPS6586X_INT_ACK1 0xb5 #define TPS6586X_INT_ACK2 0xb6 #define TPS6586X_INT_ACK3 0xb7 #define TPS6586X_INT_ACK4 0xb8 /* interrupt mask registers */ #define TPS6586X_INT_MASK1 0xb0 #define TPS6586X_INT_MASK2 0xb1 #define TPS6586X_INT_MASK3 0xb2 #define TPS6586X_INT_MASK4 0xb3 #define TPS6586X_INT_MASK5 0xb4 /* device id */ #define TPS6586X_VERSIONCRC 0xcd /* Maximum register */ #define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1) struct tps6586x_irq_data { u8 mask_reg; u8 mask_mask; }; #define TPS6586X_IRQ(_reg, _mask) \ { \ .mask_reg = (_reg) - TPS6586X_INT_MASK1, \ .mask_mask = (_mask), \ } static const struct tps6586x_irq_data tps6586x_irqs[] = { [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0), [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1), [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2), [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3), [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4), [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5), [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6), [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7), [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0), [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1), [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2), [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3), [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4), [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5), [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6), [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7), [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4), [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03), [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2), [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3), [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0), [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc), [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06), [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0), [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5), [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6), [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1), }; static struct mfd_cell tps6586x_cell[] = { { .name = "tps6586x-gpio", }, { .name = "tps6586x-rtc", }, { .name = "tps6586x-onkey", }, }; struct tps6586x { struct device *dev; struct i2c_client *client; struct regmap *regmap; struct irq_chip irq_chip; struct mutex irq_lock; int irq_base; u32 irq_en; u8 mask_reg[5]; }; static inline struct tps6586x *dev_to_tps6586x(struct device *dev) { return i2c_get_clientdata(to_i2c_client(dev)); } int tps6586x_write(struct device *dev, int reg, uint8_t val) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_write(tps6586x->regmap, reg, val); } EXPORT_SYMBOL_GPL(tps6586x_write); int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_bulk_write(tps6586x->regmap, reg, val, len); } EXPORT_SYMBOL_GPL(tps6586x_writes); int tps6586x_read(struct device *dev, int reg, uint8_t *val) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); unsigned int rval; int ret; ret = regmap_read(tps6586x->regmap, reg, &rval); if (!ret) *val = rval; return ret; } EXPORT_SYMBOL_GPL(tps6586x_read); int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_bulk_read(tps6586x->regmap, reg, val, len); } EXPORT_SYMBOL_GPL(tps6586x_reads); int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask); } EXPORT_SYMBOL_GPL(tps6586x_set_bits); int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0); } EXPORT_SYMBOL_GPL(tps6586x_clr_bits); int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_update_bits(tps6586x->regmap, reg, mask, val); } EXPORT_SYMBOL_GPL(tps6586x_update); static int __remove_subdev(struct device *dev, void *unused) { platform_device_unregister(to_platform_device(dev)); return 0; } static int tps6586x_remove_subdevs(struct tps6586x *tps6586x) { return device_for_each_child(tps6586x->dev, NULL, __remove_subdev); } static void tps6586x_irq_lock(struct irq_data *data) { struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); mutex_lock(&tps6586x->irq_lock); } static void tps6586x_irq_enable(struct irq_data *irq_data) { struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); unsigned int __irq = irq_data->irq - tps6586x->irq_base; const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq]; tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask; tps6586x->irq_en |= (1 << __irq); } static void tps6586x_irq_disable(struct irq_data *irq_data) { struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); unsigned int __irq = irq_data->irq - tps6586x->irq_base; const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq]; tps6586x->mask_reg[data->mask_reg] |= data->mask_mask; tps6586x->irq_en &= ~(1 << __irq); } static void tps6586x_irq_sync_unlock(struct irq_data *data) { struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); int i; for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) { int ret; ret = tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, tps6586x->mask_reg[i]); WARN_ON(ret); } mutex_unlock(&tps6586x->irq_lock); } static irqreturn_t tps6586x_irq(int irq, void *data) { struct tps6586x *tps6586x = data; u32 acks; int ret = 0; ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(acks), (uint8_t *)&acks); if (ret < 0) { dev_err(tps6586x->dev, "failed to read interrupt status\n"); return IRQ_NONE; } acks = le32_to_cpu(acks); while (acks) { int i = __ffs(acks); if (tps6586x->irq_en & (1 << i)) handle_nested_irq(tps6586x->irq_base + i); acks &= ~(1 << i); } return IRQ_HANDLED; } static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq, int irq_base) { int i, ret; u8 tmp[4]; if (!irq_base) { dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n"); return -EINVAL; } mutex_init(&tps6586x->irq_lock); for (i = 0; i < 5; i++) { tps6586x->mask_reg[i] = 0xff; tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff); } tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp); tps6586x->irq_base = irq_base; tps6586x->irq_chip.name = "tps6586x"; tps6586x->irq_chip.irq_enable = tps6586x_irq_enable; tps6586x->irq_chip.irq_disable = tps6586x_irq_disable; tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock; tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock; for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) { int __irq = i + tps6586x->irq_base; irq_set_chip_data(__irq, tps6586x); irq_set_chip_and_handler(__irq, &tps6586x->irq_chip, handle_simple_irq); irq_set_nested_thread(__irq, 1); #ifdef CONFIG_ARM set_irq_flags(__irq, IRQF_VALID); #endif } ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT, "tps6586x", tps6586x); if (!ret) { device_init_wakeup(tps6586x->dev, 1); enable_irq_wake(irq); } return ret; } static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x, struct tps6586x_platform_data *pdata) { struct tps6586x_subdev_info *subdev; struct platform_device *pdev; int i, ret = 0; for (i = 0; i < pdata->num_subdevs; i++) { subdev = &pdata->subdevs[i]; pdev = platform_device_alloc(subdev->name, subdev->id); if (!pdev) { ret = -ENOMEM; goto failed; } pdev->dev.parent = tps6586x->dev; pdev->dev.platform_data = subdev->platform_data; pdev->dev.of_node = subdev->of_node; ret = platform_device_add(pdev); if (ret) { platform_device_put(pdev); goto failed; } } return 0; failed: tps6586x_remove_subdevs(tps6586x); return ret; } #ifdef CONFIG_OF static struct of_regulator_match tps6586x_matches[] = { { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS }, { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 }, { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 }, { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 }, { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 }, { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 }, { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 }, { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 }, { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 }, { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 }, { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 }, { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 }, { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 }, { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 }, { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC }, }; static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client) { const unsigned int num = ARRAY_SIZE(tps6586x_matches); struct device_node *np = client->dev.of_node; struct tps6586x_platform_data *pdata; struct tps6586x_subdev_info *devs; struct device_node *regs; const char *sys_rail_name = NULL; unsigned int count; unsigned int i, j; int err; regs = of_find_node_by_name(np, "regulators"); if (!regs) return NULL; err = of_regulator_match(&client->dev, regs, tps6586x_matches, num); if (err < 0) { of_node_put(regs); return NULL; } of_node_put(regs); count = err; devs = devm_kzalloc(&client->dev, count * sizeof(*devs), GFP_KERNEL); if (!devs) return NULL; for (i = 0, j = 0; i < num && j < count; i++) { struct regulator_init_data *reg_idata; if (!tps6586x_matches[i].init_data) continue; reg_idata = tps6586x_matches[i].init_data; devs[j].name = "tps6586x-regulator"; devs[j].platform_data = tps6586x_matches[i].init_data; devs[j].id = (int)tps6586x_matches[i].driver_data; if (devs[j].id == TPS6586X_ID_SYS) sys_rail_name = reg_idata->constraints.name; if ((devs[j].id == TPS6586X_ID_LDO_5) || (devs[j].id == TPS6586X_ID_LDO_RTC)) reg_idata->supply_regulator = sys_rail_name; devs[j].of_node = tps6586x_matches[i].of_node; j++; } pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return NULL; pdata->num_subdevs = count; pdata->subdevs = devs; pdata->gpio_base = -1; pdata->irq_base = -1; pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller"); return pdata; } static struct of_device_id tps6586x_of_match[] = { { .compatible = "ti,tps6586x", }, { }, }; #else static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client) { return NULL; } #endif static bool is_volatile_reg(struct device *dev, unsigned int reg) { /* Cache all interrupt mask register */ if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5)) return false; return true; } static const struct regmap_config tps6586x_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = TPS6586X_MAX_REGISTER - 1, .volatile_reg = is_volatile_reg, .cache_type = REGCACHE_RBTREE, }; static struct device *tps6586x_dev; static void tps6586x_power_off(void) { if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT)) return; tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT); } static int __devinit tps6586x_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tps6586x_platform_data *pdata = client->dev.platform_data; struct tps6586x *tps6586x; int ret; if (!pdata && client->dev.of_node) pdata = tps6586x_parse_dt(client); if (!pdata) { dev_err(&client->dev, "tps6586x requires platform data\n"); return -ENOTSUPP; } ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC); if (ret < 0) { dev_err(&client->dev, "Chip ID read failed: %d\n", ret); return -EIO; } dev_info(&client->dev, "VERSIONCRC is %02x\n", ret); tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL); if (tps6586x == NULL) { dev_err(&client->dev, "memory for tps6586x alloc failed\n"); return -ENOMEM; } tps6586x->client = client; tps6586x->dev = &client->dev; i2c_set_clientdata(client, tps6586x); tps6586x->regmap = devm_regmap_init_i2c(client, &tps6586x_regmap_config); if (IS_ERR(tps6586x->regmap)) { ret = PTR_ERR(tps6586x->regmap); dev_err(&client->dev, "regmap init failed: %d\n", ret); return ret; } if (client->irq) { ret = tps6586x_irq_init(tps6586x, client->irq, pdata->irq_base); if (ret) { dev_err(&client->dev, "IRQ init failed: %d\n", ret); return ret; } } ret = mfd_add_devices(tps6586x->dev, -1, tps6586x_cell, ARRAY_SIZE(tps6586x_cell), NULL, 0, NULL); if (ret < 0) { dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret); goto err_mfd_add; } ret = tps6586x_add_subdevs(tps6586x, pdata); if (ret) { dev_err(&client->dev, "add devices failed: %d\n", ret); goto err_add_devs; } if (pdata->pm_off && !pm_power_off) { tps6586x_dev = &client->dev; pm_power_off = tps6586x_power_off; } return 0; err_add_devs: mfd_remove_devices(tps6586x->dev); err_mfd_add: if (client->irq) free_irq(client->irq, tps6586x); return ret; } static int __devexit tps6586x_i2c_remove(struct i2c_client *client) { struct tps6586x *tps6586x = i2c_get_clientdata(client); tps6586x_remove_subdevs(tps6586x); mfd_remove_devices(tps6586x->dev); if (client->irq) free_irq(client->irq, tps6586x); return 0; } static const struct i2c_device_id tps6586x_id_table[] = { { "tps6586x", 0 }, { }, }; MODULE_DEVICE_TABLE(i2c, tps6586x_id_table); static struct i2c_driver tps6586x_driver = { .driver = { .name = "tps6586x", .owner = THIS_MODULE, .of_match_table = of_match_ptr(tps6586x_of_match), }, .probe = tps6586x_i2c_probe, .remove = tps6586x_i2c_remove, .id_table = tps6586x_id_table, }; static int __init tps6586x_init(void) { return i2c_add_driver(&tps6586x_driver); } subsys_initcall(tps6586x_init); static void __exit tps6586x_exit(void) { i2c_del_driver(&tps6586x_driver); } module_exit(tps6586x_exit); MODULE_DESCRIPTION("TPS6586X core driver"); MODULE_AUTHOR("Mike Rapoport "); MODULE_LICENSE("GPL");