diff options
Diffstat (limited to 'drivers/mfd/palmas.c')
| -rw-r--r-- | drivers/mfd/palmas.c | 625 |
1 files changed, 625 insertions, 0 deletions
diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c new file mode 100644 index 00000000000..d280d789e55 --- /dev/null +++ b/drivers/mfd/palmas.c @@ -0,0 +1,625 @@ +/* + * TI Palmas MFD Driver + * + * Copyright 2011-2012 Texas Instruments Inc. + * + * Author: Graeme Gregory <gg@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/slab.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/regmap.h> +#include <linux/err.h> +#include <linux/mfd/core.h> +#include <linux/mfd/palmas.h> +#include <linux/of_device.h> + +#define PALMAS_EXT_REQ (PALMAS_EXT_CONTROL_ENABLE1 | \ + PALMAS_EXT_CONTROL_ENABLE2 | \ + PALMAS_EXT_CONTROL_NSLEEP) + +struct palmas_sleep_requestor_info { + int id; + int reg_offset; + int bit_pos; +}; + +#define EXTERNAL_REQUESTOR(_id, _offset, _pos) \ + [PALMAS_EXTERNAL_REQSTR_ID_##_id] = { \ + .id = PALMAS_EXTERNAL_REQSTR_ID_##_id, \ + .reg_offset = _offset, \ + .bit_pos = _pos, \ + } + +static struct palmas_sleep_requestor_info sleep_req_info[] = { + EXTERNAL_REQUESTOR(REGEN1, 0, 0), + EXTERNAL_REQUESTOR(REGEN2, 0, 1), + EXTERNAL_REQUESTOR(SYSEN1, 0, 2), + EXTERNAL_REQUESTOR(SYSEN2, 0, 3), + EXTERNAL_REQUESTOR(CLK32KG, 0, 4), + EXTERNAL_REQUESTOR(CLK32KGAUDIO, 0, 5), + EXTERNAL_REQUESTOR(REGEN3, 0, 6), + EXTERNAL_REQUESTOR(SMPS12, 1, 0), + EXTERNAL_REQUESTOR(SMPS3, 1, 1), + EXTERNAL_REQUESTOR(SMPS45, 1, 2), + EXTERNAL_REQUESTOR(SMPS6, 1, 3), + EXTERNAL_REQUESTOR(SMPS7, 1, 4), + EXTERNAL_REQUESTOR(SMPS8, 1, 5), + EXTERNAL_REQUESTOR(SMPS9, 1, 6), + EXTERNAL_REQUESTOR(SMPS10, 1, 7), + EXTERNAL_REQUESTOR(LDO1, 2, 0), + EXTERNAL_REQUESTOR(LDO2, 2, 1), + EXTERNAL_REQUESTOR(LDO3, 2, 2), + EXTERNAL_REQUESTOR(LDO4, 2, 3), + EXTERNAL_REQUESTOR(LDO5, 2, 4), + EXTERNAL_REQUESTOR(LDO6, 2, 5), + EXTERNAL_REQUESTOR(LDO7, 2, 6), + EXTERNAL_REQUESTOR(LDO8, 2, 7), + EXTERNAL_REQUESTOR(LDO9, 3, 0), + EXTERNAL_REQUESTOR(LDOLN, 3, 1), + EXTERNAL_REQUESTOR(LDOUSB, 3, 2), +}; + +static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = { + { + .reg_bits = 8, + .val_bits = 8, + .max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE, + PALMAS_PRIMARY_SECONDARY_PAD3), + }, + { + .reg_bits = 8, + .val_bits = 8, + .max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE, + PALMAS_GPADC_SMPS_VSEL_MONITORING), + }, + { + .reg_bits = 8, + .val_bits = 8, + .max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE, + PALMAS_GPADC_TRIM16), + }, +}; + +static const struct regmap_irq palmas_irqs[] = { + /* INT1 IRQs */ + [PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = { + .mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV, + }, + [PALMAS_PWRON_IRQ] = { + .mask = PALMAS_INT1_STATUS_PWRON, + }, + [PALMAS_LONG_PRESS_KEY_IRQ] = { + .mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY, + }, + [PALMAS_RPWRON_IRQ] = { + .mask = PALMAS_INT1_STATUS_RPWRON, + }, + [PALMAS_PWRDOWN_IRQ] = { + .mask = PALMAS_INT1_STATUS_PWRDOWN, + }, + [PALMAS_HOTDIE_IRQ] = { + .mask = PALMAS_INT1_STATUS_HOTDIE, + }, + [PALMAS_VSYS_MON_IRQ] = { + .mask = PALMAS_INT1_STATUS_VSYS_MON, + }, + [PALMAS_VBAT_MON_IRQ] = { + .mask = PALMAS_INT1_STATUS_VBAT_MON, + }, + /* INT2 IRQs*/ + [PALMAS_RTC_ALARM_IRQ] = { + .mask = PALMAS_INT2_STATUS_RTC_ALARM, + .reg_offset = 1, + }, + [PALMAS_RTC_TIMER_IRQ] = { + .mask = PALMAS_INT2_STATUS_RTC_TIMER, + .reg_offset = 1, + }, + [PALMAS_WDT_IRQ] = { + .mask = PALMAS_INT2_STATUS_WDT, + .reg_offset = 1, + }, + [PALMAS_BATREMOVAL_IRQ] = { + .mask = PALMAS_INT2_STATUS_BATREMOVAL, + .reg_offset = 1, + }, + [PALMAS_RESET_IN_IRQ] = { + .mask = PALMAS_INT2_STATUS_RESET_IN, + .reg_offset = 1, + }, + [PALMAS_FBI_BB_IRQ] = { + .mask = PALMAS_INT2_STATUS_FBI_BB, + .reg_offset = 1, + }, + [PALMAS_SHORT_IRQ] = { + .mask = PALMAS_INT2_STATUS_SHORT, + .reg_offset = 1, + }, + [PALMAS_VAC_ACOK_IRQ] = { + .mask = PALMAS_INT2_STATUS_VAC_ACOK, + .reg_offset = 1, + }, + /* INT3 IRQs */ + [PALMAS_GPADC_AUTO_0_IRQ] = { + .mask = PALMAS_INT3_STATUS_GPADC_AUTO_0, + .reg_offset = 2, + }, + [PALMAS_GPADC_AUTO_1_IRQ] = { + .mask = PALMAS_INT3_STATUS_GPADC_AUTO_1, + .reg_offset = 2, + }, + [PALMAS_GPADC_EOC_SW_IRQ] = { + .mask = PALMAS_INT3_STATUS_GPADC_EOC_SW, + .reg_offset = 2, + }, + [PALMAS_GPADC_EOC_RT_IRQ] = { + .mask = PALMAS_INT3_STATUS_GPADC_EOC_RT, + .reg_offset = 2, + }, + [PALMAS_ID_OTG_IRQ] = { + .mask = PALMAS_INT3_STATUS_ID_OTG, + .reg_offset = 2, + }, + [PALMAS_ID_IRQ] = { + .mask = PALMAS_INT3_STATUS_ID, + .reg_offset = 2, + }, + [PALMAS_VBUS_OTG_IRQ] = { + .mask = PALMAS_INT3_STATUS_VBUS_OTG, + .reg_offset = 2, + }, + [PALMAS_VBUS_IRQ] = { + .mask = PALMAS_INT3_STATUS_VBUS, + .reg_offset = 2, + }, + /* INT4 IRQs */ + [PALMAS_GPIO_0_IRQ] = { + .mask = PALMAS_INT4_STATUS_GPIO_0, + .reg_offset = 3, + }, + [PALMAS_GPIO_1_IRQ] = { + .mask = PALMAS_INT4_STATUS_GPIO_1, + .reg_offset = 3, + }, + [PALMAS_GPIO_2_IRQ] = { + .mask = PALMAS_INT4_STATUS_GPIO_2, + .reg_offset = 3, + }, + [PALMAS_GPIO_3_IRQ] = { + .mask = PALMAS_INT4_STATUS_GPIO_3, + .reg_offset = 3, + }, + [PALMAS_GPIO_4_IRQ] = { + .mask = PALMAS_INT4_STATUS_GPIO_4, + .reg_offset = 3, + }, + [PALMAS_GPIO_5_IRQ] = { + .mask = PALMAS_INT4_STATUS_GPIO_5, + .reg_offset = 3, + }, + [PALMAS_GPIO_6_IRQ] = { + .mask = PALMAS_INT4_STATUS_GPIO_6, + .reg_offset = 3, + }, + [PALMAS_GPIO_7_IRQ] = { + .mask = PALMAS_INT4_STATUS_GPIO_7, + .reg_offset = 3, + }, +}; + +static struct regmap_irq_chip palmas_irq_chip = { + .name = "palmas", + .irqs = palmas_irqs, + .num_irqs = ARRAY_SIZE(palmas_irqs), + + .num_regs = 4, + .irq_reg_stride = 5, + .status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, + PALMAS_INT1_STATUS), + .mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, + PALMAS_INT1_MASK), +}; + +int palmas_ext_control_req_config(struct palmas *palmas, + enum palmas_external_requestor_id id, int ext_ctrl, bool enable) +{ + int preq_mask_bit = 0; + int reg_add = 0; + int bit_pos; + int ret; + + if (!(ext_ctrl & PALMAS_EXT_REQ)) + return 0; + + if (id >= PALMAS_EXTERNAL_REQSTR_ID_MAX) + return 0; + + if (ext_ctrl & PALMAS_EXT_CONTROL_NSLEEP) { + reg_add = PALMAS_NSLEEP_RES_ASSIGN; + preq_mask_bit = 0; + } else if (ext_ctrl & PALMAS_EXT_CONTROL_ENABLE1) { + reg_add = PALMAS_ENABLE1_RES_ASSIGN; + preq_mask_bit = 1; + } else if (ext_ctrl & PALMAS_EXT_CONTROL_ENABLE2) { + reg_add = PALMAS_ENABLE2_RES_ASSIGN; + preq_mask_bit = 2; + } + + bit_pos = sleep_req_info[id].bit_pos; + reg_add += sleep_req_info[id].reg_offset; + if (enable) + ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE, + reg_add, BIT(bit_pos), BIT(bit_pos)); + else + ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE, + reg_add, BIT(bit_pos), 0); + if (ret < 0) { + dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n", + reg_add, ret); + return ret; + } + + /* Unmask the PREQ */ + ret = palmas_update_bits(palmas, PALMAS_PMU_CONTROL_BASE, + PALMAS_POWER_CTRL, BIT(preq_mask_bit), 0); + if (ret < 0) { + dev_err(palmas->dev, "POWER_CTRL register update failed %d\n", + ret); + return ret; + } + return ret; +} +EXPORT_SYMBOL_GPL(palmas_ext_control_req_config); + +static int palmas_set_pdata_irq_flag(struct i2c_client *i2c, + struct palmas_platform_data *pdata) +{ + struct irq_data *irq_data = irq_get_irq_data(i2c->irq); + if (!irq_data) { + dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq); + return -EINVAL; + } + + pdata->irq_flags = irqd_get_trigger_type(irq_data); + dev_info(&i2c->dev, "Irq flag is 0x%08x\n", pdata->irq_flags); + return 0; +} + +static void palmas_dt_to_pdata(struct i2c_client *i2c, + struct palmas_platform_data *pdata) +{ + struct device_node *node = i2c->dev.of_node; + int ret; + u32 prop; + + ret = of_property_read_u32(node, "ti,mux-pad1", &prop); + if (!ret) { + pdata->mux_from_pdata = 1; + pdata->pad1 = prop; + } + + ret = of_property_read_u32(node, "ti,mux-pad2", &prop); + if (!ret) { + pdata->mux_from_pdata = 1; + pdata->pad2 = prop; + } + + /* The default for this register is all masked */ + ret = of_property_read_u32(node, "ti,power-ctrl", &prop); + if (!ret) + pdata->power_ctrl = prop; + else + pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK | + PALMAS_POWER_CTRL_ENABLE1_MASK | + PALMAS_POWER_CTRL_ENABLE2_MASK; + if (i2c->irq) + palmas_set_pdata_irq_flag(i2c, pdata); + + pdata->pm_off = of_property_read_bool(node, + "ti,system-power-controller"); +} + +static struct palmas *palmas_dev; +static void palmas_power_off(void) +{ + unsigned int addr; + int ret, slave; + + if (!palmas_dev) + return; + + slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE); + addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_DEV_CTRL); + + ret = regmap_update_bits( + palmas_dev->regmap[slave], + addr, + PALMAS_DEV_CTRL_DEV_ON, + 0); + + if (ret) + pr_err("%s: Unable to write to DEV_CTRL_DEV_ON: %d\n", + __func__, ret); +} + +static unsigned int palmas_features = PALMAS_PMIC_FEATURE_SMPS10_BOOST; +static unsigned int tps659038_features; + +static const struct of_device_id of_palmas_match_tbl[] = { + { + .compatible = "ti,palmas", + .data = &palmas_features, + }, + { + .compatible = "ti,tps659038", + .data = &tps659038_features, + }, + { }, +}; +MODULE_DEVICE_TABLE(of, of_palmas_match_tbl); + +static int palmas_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct palmas *palmas; + struct palmas_platform_data *pdata; + struct device_node *node = i2c->dev.of_node; + int ret = 0, i; + unsigned int reg, addr, *features; + int slave; + const struct of_device_id *match; + + pdata = dev_get_platdata(&i2c->dev); + + if (node && !pdata) { + pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL); + + if (!pdata) + return -ENOMEM; + + palmas_dt_to_pdata(i2c, pdata); + } + + if (!pdata) + return -EINVAL; + + palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL); + if (palmas == NULL) + return -ENOMEM; + + i2c_set_clientdata(i2c, palmas); + palmas->dev = &i2c->dev; + palmas->irq = i2c->irq; + + match = of_match_device(of_palmas_match_tbl, &i2c->dev); + + if (!match) + return -ENODATA; + + features = (unsigned int *)match->data; + palmas->features = *features; + + for (i = 0; i < PALMAS_NUM_CLIENTS; i++) { + if (i == 0) + palmas->i2c_clients[i] = i2c; + else { + palmas->i2c_clients[i] = + i2c_new_dummy(i2c->adapter, + i2c->addr + i); + if (!palmas->i2c_clients[i]) { + dev_err(palmas->dev, + "can't attach client %d\n", i); + ret = -ENOMEM; + goto err_i2c; + } + palmas->i2c_clients[i]->dev.of_node = of_node_get(node); + } + palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i], + &palmas_regmap_config[i]); + if (IS_ERR(palmas->regmap[i])) { + ret = PTR_ERR(palmas->regmap[i]); + dev_err(palmas->dev, + "Failed to allocate regmap %d, err: %d\n", + i, ret); + goto err_i2c; + } + } + + if (!palmas->irq) { + dev_warn(palmas->dev, "IRQ missing: skipping irq request\n"); + goto no_irq; + } + + /* Change interrupt line output polarity */ + if (pdata->irq_flags & IRQ_TYPE_LEVEL_HIGH) + reg = PALMAS_POLARITY_CTRL_INT_POLARITY; + else + reg = 0; + ret = palmas_update_bits(palmas, PALMAS_PU_PD_OD_BASE, + PALMAS_POLARITY_CTRL, PALMAS_POLARITY_CTRL_INT_POLARITY, + reg); + if (ret < 0) { + dev_err(palmas->dev, "POLARITY_CTRL updat failed: %d\n", ret); + goto err_i2c; + } + + /* Change IRQ into clear on read mode for efficiency */ + slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE); + addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL); + reg = PALMAS_INT_CTRL_INT_CLEAR; + + regmap_write(palmas->regmap[slave], addr, reg); + + ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq, + IRQF_ONESHOT | pdata->irq_flags, 0, &palmas_irq_chip, + &palmas->irq_data); + if (ret < 0) + goto err_i2c; + +no_irq: + slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE); + addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE, + PALMAS_PRIMARY_SECONDARY_PAD1); + + if (pdata->mux_from_pdata) { + reg = pdata->pad1; + ret = regmap_write(palmas->regmap[slave], addr, reg); + if (ret) + goto err_irq; + } else { + ret = regmap_read(palmas->regmap[slave], addr, ®); + if (ret) + goto err_irq; + } + + if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0)) + palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED; + if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK)) + palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED; + else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) == + (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT)) + palmas->led_muxed |= PALMAS_LED1_MUXED; + else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) == + (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT)) + palmas->pwm_muxed |= PALMAS_PWM1_MUXED; + if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK)) + palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED; + else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) == + (2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT)) + palmas->led_muxed |= PALMAS_LED2_MUXED; + else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) == + (3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT)) + palmas->pwm_muxed |= PALMAS_PWM2_MUXED; + if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3)) + palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED; + + addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE, + PALMAS_PRIMARY_SECONDARY_PAD2); + + if (pdata->mux_from_pdata) { + reg = pdata->pad2; + ret = regmap_write(palmas->regmap[slave], addr, reg); + if (ret) + goto err_irq; + } else { + ret = regmap_read(palmas->regmap[slave], addr, ®); + if (ret) + goto err_irq; + } + + if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4)) + palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED; + if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK)) + palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED; + if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6)) + palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED; + if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK)) + palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED; + + dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n", + palmas->gpio_muxed, palmas->pwm_muxed, + palmas->led_muxed); + + reg = pdata->power_ctrl; + + slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE); + addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL); + + ret = regmap_write(palmas->regmap[slave], addr, reg); + if (ret) + goto err_irq; + + /* + * If we are probing with DT do this the DT way and return here + * otherwise continue and add devices using mfd helpers. + */ + if (node) { + ret = of_platform_populate(node, NULL, NULL, &i2c->dev); + if (ret < 0) { + goto err_irq; + } else if (pdata->pm_off && !pm_power_off) { + palmas_dev = palmas; + pm_power_off = palmas_power_off; + } + } + + return ret; + +err_irq: + regmap_del_irq_chip(palmas->irq, palmas->irq_data); +err_i2c: + for (i = 1; i < PALMAS_NUM_CLIENTS; i++) { + if (palmas->i2c_clients[i]) + i2c_unregister_device(palmas->i2c_clients[i]); + } + return ret; +} + +static int palmas_i2c_remove(struct i2c_client *i2c) +{ + struct palmas *palmas = i2c_get_clientdata(i2c); + int i; + + regmap_del_irq_chip(palmas->irq, palmas->irq_data); + + for (i = 1; i < PALMAS_NUM_CLIENTS; i++) { + if (palmas->i2c_clients[i]) + i2c_unregister_device(palmas->i2c_clients[i]); + } + + if (palmas == palmas_dev) { + pm_power_off = NULL; + palmas_dev = NULL; + } + + return 0; +} + +static const struct i2c_device_id palmas_i2c_id[] = { + { "palmas", }, + { "twl6035", }, + { "twl6037", }, + { "tps65913", }, + { /* end */ } +}; +MODULE_DEVICE_TABLE(i2c, palmas_i2c_id); + +static struct i2c_driver palmas_i2c_driver = { + .driver = { + .name = "palmas", + .of_match_table = of_palmas_match_tbl, + .owner = THIS_MODULE, + }, + .probe = palmas_i2c_probe, + .remove = palmas_i2c_remove, + .id_table = palmas_i2c_id, +}; + +static int __init palmas_i2c_init(void) +{ + return i2c_add_driver(&palmas_i2c_driver); +} +/* init early so consumer devices can complete system boot */ +subsys_initcall(palmas_i2c_init); + +static void __exit palmas_i2c_exit(void) +{ + i2c_del_driver(&palmas_i2c_driver); +} +module_exit(palmas_i2c_exit); + +MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); +MODULE_DESCRIPTION("Palmas chip family multi-function driver"); +MODULE_LICENSE("GPL"); |