/* * tps65910.c -- TI TPS6591x * * Copyright 2010 Texas Instruments Inc. * * Author: Graeme Gregory <gg@slimlogic.co.uk> * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> * * 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 <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/mfd/core.h> #include <linux/regmap.h> #include <linux/mfd/tps65910.h> #include <linux/of_device.h> static struct mfd_cell tps65910s[] = { { .name = "tps65910-gpio", }, { .name = "tps65910-pmic", }, { .name = "tps65910-rtc", }, { .name = "tps65910-power", }, }; static bool is_volatile_reg(struct device *dev, unsigned int reg) { struct tps65910 *tps65910 = dev_get_drvdata(dev); /* * Caching all regulator registers. * All regualator register address range is same for * TPS65910 and TPS65911 */ if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) { /* Check for non-existing register */ if (tps65910_chip_id(tps65910) == TPS65910) if ((reg == TPS65911_VDDCTRL_OP) || (reg == TPS65911_VDDCTRL_SR)) return true; return false; } return true; } static const struct regmap_config tps65910_regmap_config = { .reg_bits = 8, .val_bits = 8, .volatile_reg = is_volatile_reg, .max_register = TPS65910_MAX_REGISTER - 1, .cache_type = REGCACHE_RBTREE, }; static int __devinit tps65910_ck32k_init(struct tps65910 *tps65910, struct tps65910_board *pmic_pdata) { int ret; if (!pmic_pdata->en_ck32k_xtal) return 0; ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, DEVCTRL_CK32K_CTRL_MASK); if (ret < 0) { dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret); return ret; } return 0; } static int __devinit tps65910_sleepinit(struct tps65910 *tps65910, struct tps65910_board *pmic_pdata) { struct device *dev = NULL; int ret = 0; dev = tps65910->dev; if (!pmic_pdata->en_dev_slp) return 0; /* enabling SLEEP device state */ ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL, DEVCTRL_DEV_SLP_MASK); if (ret < 0) { dev_err(dev, "set dev_slp failed: %d\n", ret); goto err_sleep_init; } /* Return if there is no sleep keepon data. */ if (!pmic_pdata->slp_keepon) return 0; if (pmic_pdata->slp_keepon->therm_keepon) { ret = tps65910_reg_set_bits(tps65910, TPS65910_SLEEP_KEEP_RES_ON, SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK); if (ret < 0) { dev_err(dev, "set therm_keepon failed: %d\n", ret); goto disable_dev_slp; } } if (pmic_pdata->slp_keepon->clkout32k_keepon) { ret = tps65910_reg_set_bits(tps65910, TPS65910_SLEEP_KEEP_RES_ON, SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK); if (ret < 0) { dev_err(dev, "set clkout32k_keepon failed: %d\n", ret); goto disable_dev_slp; } } if (pmic_pdata->slp_keepon->i2chs_keepon) { ret = tps65910_reg_set_bits(tps65910, TPS65910_SLEEP_KEEP_RES_ON, SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK); if (ret < 0) { dev_err(dev, "set i2chs_keepon failed: %d\n", ret); goto disable_dev_slp; } } return 0; disable_dev_slp: tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, DEVCTRL_DEV_SLP_MASK); err_sleep_init: return ret; } #ifdef CONFIG_OF static struct of_device_id tps65910_of_match[] = { { .compatible = "ti,tps65910", .data = (void *)TPS65910}, { .compatible = "ti,tps65911", .data = (void *)TPS65911}, { }, }; MODULE_DEVICE_TABLE(of, tps65910_of_match); static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, int *chip_id) { struct device_node *np = client->dev.of_node; struct tps65910_board *board_info; unsigned int prop; const struct of_device_id *match; int ret = 0; match = of_match_device(tps65910_of_match, &client->dev); if (!match) { dev_err(&client->dev, "Failed to find matching dt id\n"); return NULL; } *chip_id = (int)match->data; board_info = devm_kzalloc(&client->dev, sizeof(*board_info), GFP_KERNEL); if (!board_info) { dev_err(&client->dev, "Failed to allocate pdata\n"); return NULL; } ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop); if (!ret) board_info->vmbch_threshold = prop; else if (*chip_id == TPS65911) dev_warn(&client->dev, "VMBCH-Threshold not specified"); ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop); if (!ret) board_info->vmbch2_threshold = prop; else if (*chip_id == TPS65911) dev_warn(&client->dev, "VMBCH2-Threshold not specified"); prop = of_property_read_bool(np, "ti,en-ck32k-xtal"); board_info->en_ck32k_xtal = prop; board_info->irq = client->irq; board_info->irq_base = -1; return board_info; } #else static inline struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, int *chip_id) { return NULL; } #endif static __devinit int tps65910_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct tps65910 *tps65910; struct tps65910_board *pmic_plat_data; struct tps65910_board *of_pmic_plat_data = NULL; struct tps65910_platform_data *init_data; int ret = 0; int chip_id = id->driver_data; pmic_plat_data = dev_get_platdata(&i2c->dev); if (!pmic_plat_data && i2c->dev.of_node) { pmic_plat_data = tps65910_parse_dt(i2c, &chip_id); of_pmic_plat_data = pmic_plat_data; } if (!pmic_plat_data) return -EINVAL; init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL); if (init_data == NULL) return -ENOMEM; tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL); if (tps65910 == NULL) return -ENOMEM; tps65910->of_plat_data = of_pmic_plat_data; i2c_set_clientdata(i2c, tps65910); tps65910->dev = &i2c->dev; tps65910->i2c_client = i2c; tps65910->id = chip_id; mutex_init(&tps65910->io_mutex); tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config); if (IS_ERR(tps65910->regmap)) { ret = PTR_ERR(tps65910->regmap); dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); return ret; } ret = mfd_add_devices(tps65910->dev, -1, tps65910s, ARRAY_SIZE(tps65910s), NULL, 0, NULL); if (ret < 0) { dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret); return ret; } init_data->irq = pmic_plat_data->irq; init_data->irq_base = pmic_plat_data->irq_base; tps65910_irq_init(tps65910, init_data->irq, init_data); tps65910_ck32k_init(tps65910, pmic_plat_data); tps65910_sleepinit(tps65910, pmic_plat_data); return ret; } static __devexit int tps65910_i2c_remove(struct i2c_client *i2c) { struct tps65910 *tps65910 = i2c_get_clientdata(i2c); tps65910_irq_exit(tps65910); mfd_remove_devices(tps65910->dev); return 0; } static const struct i2c_device_id tps65910_i2c_id[] = { { "tps65910", TPS65910 }, { "tps65911", TPS65911 }, { } }; MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id); static struct i2c_driver tps65910_i2c_driver = { .driver = { .name = "tps65910", .owner = THIS_MODULE, .of_match_table = of_match_ptr(tps65910_of_match), }, .probe = tps65910_i2c_probe, .remove = __devexit_p(tps65910_i2c_remove), .id_table = tps65910_i2c_id, }; static int __init tps65910_i2c_init(void) { return i2c_add_driver(&tps65910_i2c_driver); } /* init early so consumer devices can complete system boot */ subsys_initcall(tps65910_i2c_init); static void __exit tps65910_i2c_exit(void) { i2c_del_driver(&tps65910_i2c_driver); } module_exit(tps65910_i2c_exit); MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); MODULE_DESCRIPTION("TPS6591x chip family multi-function driver"); MODULE_LICENSE("GPL");