/* * Core driver access RC5T583 power management chip. * * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved. * Author: Laxman dewangan * * Based on code * Copyright (C) 2011 RICOH COMPANY,LTD * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * */ #include #include #include #include #include #include #include #include #include #include #include #define RICOH_ONOFFSEL_REG 0x10 #define RICOH_SWCTL_REG 0x5E struct deepsleep_control_data { u8 reg_add; u8 ds_pos_bit; }; #define DEEPSLEEP_INIT(_id, _reg, _pos) \ { \ .reg_add = RC5T583_##_reg, \ .ds_pos_bit = _pos, \ } static struct deepsleep_control_data deepsleep_data[] = { DEEPSLEEP_INIT(DC0, SLPSEQ1, 0), DEEPSLEEP_INIT(DC1, SLPSEQ1, 4), DEEPSLEEP_INIT(DC2, SLPSEQ2, 0), DEEPSLEEP_INIT(DC3, SLPSEQ2, 4), DEEPSLEEP_INIT(LDO0, SLPSEQ3, 0), DEEPSLEEP_INIT(LDO1, SLPSEQ3, 4), DEEPSLEEP_INIT(LDO2, SLPSEQ4, 0), DEEPSLEEP_INIT(LDO3, SLPSEQ4, 4), DEEPSLEEP_INIT(LDO4, SLPSEQ5, 0), DEEPSLEEP_INIT(LDO5, SLPSEQ5, 4), DEEPSLEEP_INIT(LDO6, SLPSEQ6, 0), DEEPSLEEP_INIT(LDO7, SLPSEQ6, 4), DEEPSLEEP_INIT(LDO8, SLPSEQ7, 0), DEEPSLEEP_INIT(LDO9, SLPSEQ7, 4), DEEPSLEEP_INIT(PSO0, SLPSEQ8, 0), DEEPSLEEP_INIT(PSO1, SLPSEQ8, 4), DEEPSLEEP_INIT(PSO2, SLPSEQ9, 0), DEEPSLEEP_INIT(PSO3, SLPSEQ9, 4), DEEPSLEEP_INIT(PSO4, SLPSEQ10, 0), DEEPSLEEP_INIT(PSO5, SLPSEQ10, 4), DEEPSLEEP_INIT(PSO6, SLPSEQ11, 0), DEEPSLEEP_INIT(PSO7, SLPSEQ11, 4), }; #define EXT_PWR_REQ \ (RC5T583_EXT_PWRREQ1_CONTROL | RC5T583_EXT_PWRREQ2_CONTROL) static struct mfd_cell rc5t583_subdevs[] = { {.name = "rc5t583-gpio",}, {.name = "rc5t583-regulator",}, {.name = "rc5t583-rtc", }, {.name = "rc5t583-key", } }; static int __rc5t583_set_ext_pwrreq1_control(struct device *dev, int id, int ext_pwr, int slots) { int ret; uint8_t sleepseq_val; unsigned int en_bit; unsigned int slot_bit; if (id == RC5T583_DS_DC0) { dev_err(dev, "PWRREQ1 is invalid control for rail %d\n", id); return -EINVAL; } en_bit = deepsleep_data[id].ds_pos_bit; slot_bit = en_bit + 1; ret = rc5t583_read(dev, deepsleep_data[id].reg_add, &sleepseq_val); if (ret < 0) { dev_err(dev, "Error in reading reg 0x%x\n", deepsleep_data[id].reg_add); return ret; } sleepseq_val &= ~(0xF << en_bit); sleepseq_val |= BIT(en_bit); sleepseq_val |= ((slots & 0x7) << slot_bit); ret = rc5t583_set_bits(dev, RICOH_ONOFFSEL_REG, BIT(1)); if (ret < 0) { dev_err(dev, "Error in updating the 0x%02x register\n", RICOH_ONOFFSEL_REG); return ret; } ret = rc5t583_write(dev, deepsleep_data[id].reg_add, sleepseq_val); if (ret < 0) { dev_err(dev, "Error in writing reg 0x%x\n", deepsleep_data[id].reg_add); return ret; } if (id == RC5T583_DS_LDO4) { ret = rc5t583_write(dev, RICOH_SWCTL_REG, 0x1); if (ret < 0) dev_err(dev, "Error in writing reg 0x%x\n", RICOH_SWCTL_REG); } return ret; } static int __rc5t583_set_ext_pwrreq2_control(struct device *dev, int id, int ext_pwr) { int ret; if (id != RC5T583_DS_DC0) { dev_err(dev, "PWRREQ2 is invalid control for rail %d\n", id); return -EINVAL; } ret = rc5t583_set_bits(dev, RICOH_ONOFFSEL_REG, BIT(2)); if (ret < 0) dev_err(dev, "Error in updating the ONOFFSEL 0x10 register\n"); return ret; } int rc5t583_ext_power_req_config(struct device *dev, int ds_id, int ext_pwr_req, int deepsleep_slot_nr) { if ((ext_pwr_req & EXT_PWR_REQ) == EXT_PWR_REQ) return -EINVAL; if (ext_pwr_req & RC5T583_EXT_PWRREQ1_CONTROL) return __rc5t583_set_ext_pwrreq1_control(dev, ds_id, ext_pwr_req, deepsleep_slot_nr); if (ext_pwr_req & RC5T583_EXT_PWRREQ2_CONTROL) return __rc5t583_set_ext_pwrreq2_control(dev, ds_id, ext_pwr_req); return 0; } EXPORT_SYMBOL(rc5t583_ext_power_req_config); static int rc5t583_clear_ext_power_req(struct rc5t583 *rc5t583, struct rc5t583_platform_data *pdata) { int ret; int i; uint8_t on_off_val = 0; /* Clear ONOFFSEL register */ if (pdata->enable_shutdown) on_off_val = 0x1; ret = rc5t583_write(rc5t583->dev, RICOH_ONOFFSEL_REG, on_off_val); if (ret < 0) dev_warn(rc5t583->dev, "Error in writing reg %d error: %d\n", RICOH_ONOFFSEL_REG, ret); ret = rc5t583_write(rc5t583->dev, RICOH_SWCTL_REG, 0x0); if (ret < 0) dev_warn(rc5t583->dev, "Error in writing reg %d error: %d\n", RICOH_SWCTL_REG, ret); /* Clear sleep sequence register */ for (i = RC5T583_SLPSEQ1; i <= RC5T583_SLPSEQ11; ++i) { ret = rc5t583_write(rc5t583->dev, i, 0x0); if (ret < 0) dev_warn(rc5t583->dev, "Error in writing reg 0x%02x error: %d\n", i, ret); } return 0; } static bool volatile_reg(struct device *dev, unsigned int reg) { /* Enable caching in interrupt registers */ switch (reg) { case RC5T583_INT_EN_SYS1: case RC5T583_INT_EN_SYS2: case RC5T583_INT_EN_DCDC: case RC5T583_INT_EN_RTC: case RC5T583_INT_EN_ADC1: case RC5T583_INT_EN_ADC2: case RC5T583_INT_EN_ADC3: case RC5T583_GPIO_GPEDGE1: case RC5T583_GPIO_GPEDGE2: case RC5T583_GPIO_EN_INT: return false; case RC5T583_GPIO_MON_IOIN: /* This is gpio input register */ return true; default: /* Enable caching in gpio registers */ if ((reg >= RC5T583_GPIO_IOSEL) && (reg <= RC5T583_GPIO_GPOFUNC)) return false; /* Enable caching in sleep seq registers */ if ((reg >= RC5T583_SLPSEQ1) && (reg <= RC5T583_SLPSEQ11)) return false; /* Enable caching of regulator registers */ if ((reg >= RC5T583_REG_DC0CTL) && (reg <= RC5T583_REG_SR3CTL)) return false; if ((reg >= RC5T583_REG_LDOEN1) && (reg <= RC5T583_REG_LDO9DAC_DS)) return false; break; } return true; } static const struct regmap_config rc5t583_regmap_config = { .reg_bits = 8, .val_bits = 8, .volatile_reg = volatile_reg, .max_register = RC5T583_MAX_REGS, .num_reg_defaults_raw = RC5T583_MAX_REGS, .cache_type = REGCACHE_RBTREE, }; static int __devinit rc5t583_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct rc5t583 *rc5t583; struct rc5t583_platform_data *pdata = i2c->dev.platform_data; int ret; bool irq_init_success = false; if (!pdata) { dev_err(&i2c->dev, "Err: Platform data not found\n"); return -EINVAL; } rc5t583 = devm_kzalloc(&i2c->dev, sizeof(struct rc5t583), GFP_KERNEL); if (!rc5t583) { dev_err(&i2c->dev, "Memory allocation failed\n"); return -ENOMEM; } rc5t583->dev = &i2c->dev; i2c_set_clientdata(i2c, rc5t583); rc5t583->regmap = regmap_init_i2c(i2c, &rc5t583_regmap_config); if (IS_ERR(rc5t583->regmap)) { ret = PTR_ERR(rc5t583->regmap); dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); return ret; } ret = rc5t583_clear_ext_power_req(rc5t583, pdata); if (ret < 0) goto err_irq_init; if (i2c->irq) { ret = rc5t583_irq_init(rc5t583, i2c->irq, pdata->irq_base); /* Still continue with waring if irq init fails */ if (ret) dev_warn(&i2c->dev, "IRQ init failed: %d\n", ret); else irq_init_success = true; } ret = mfd_add_devices(rc5t583->dev, -1, rc5t583_subdevs, ARRAY_SIZE(rc5t583_subdevs), NULL, 0); if (ret) { dev_err(&i2c->dev, "add mfd devices failed: %d\n", ret); goto err_add_devs; } return 0; err_add_devs: if (irq_init_success) rc5t583_irq_exit(rc5t583); err_irq_init: regmap_exit(rc5t583->regmap); return ret; } static int __devexit rc5t583_i2c_remove(struct i2c_client *i2c) { struct rc5t583 *rc5t583 = i2c_get_clientdata(i2c); mfd_remove_devices(rc5t583->dev); rc5t583_irq_exit(rc5t583); regmap_exit(rc5t583->regmap); return 0; } static const struct i2c_device_id rc5t583_i2c_id[] = { {.name = "rc5t583", .driver_data = 0}, {} }; MODULE_DEVICE_TABLE(i2c, rc5t583_i2c_id); static struct i2c_driver rc5t583_i2c_driver = { .driver = { .name = "rc5t583", .owner = THIS_MODULE, }, .probe = rc5t583_i2c_probe, .remove = __devexit_p(rc5t583_i2c_remove), .id_table = rc5t583_i2c_id, }; static int __init rc5t583_i2c_init(void) { return i2c_add_driver(&rc5t583_i2c_driver); } subsys_initcall(rc5t583_i2c_init); static void __exit rc5t583_i2c_exit(void) { i2c_del_driver(&rc5t583_i2c_driver); } module_exit(rc5t583_i2c_exit); MODULE_AUTHOR("Laxman Dewangan "); MODULE_DESCRIPTION("RICOH RC5T583 power management system device driver"); MODULE_LICENSE("GPL v2");