diff options
| -rw-r--r-- | drivers/mfd/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mfd/axp20x.c | 258 | ||||
| -rw-r--r-- | include/linux/mfd/axp20x.h | 180 |
4 files changed, 451 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index e166d7176d7a..c681741ce492 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -67,6 +67,18 @@ config MFD_BCM590XX help Support for the BCM590xx PMUs from Broadcom +config MFD_AXP20X + bool "X-Powers AXP20X" + select MFD_CORE + select REGMAP_I2C + select REGMAP_IRQ + depends on I2C=y + help + If you say Y here you get support for the X-Powers AXP202 and AXP209. + This driver include only the core APIs. You have to select individual + components like regulators or the PEK (Power Enable Key) under the + corresponding menus. + config MFD_CROS_EC tristate "ChromeOS Embedded Controller" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 2851275e2656..1efecf2793ae 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -102,6 +102,7 @@ obj-$(CONFIG_PMIC_DA9052) += da9052-irq.o obj-$(CONFIG_PMIC_DA9052) += da9052-core.o obj-$(CONFIG_MFD_DA9052_SPI) += da9052-spi.o obj-$(CONFIG_MFD_DA9052_I2C) += da9052-i2c.o +obj-$(CONFIG_MFD_AXP20X) += axp20x.o obj-$(CONFIG_MFD_LP3943) += lp3943.o obj-$(CONFIG_MFD_LP8788) += lp8788.o lp8788-irq.o diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c new file mode 100644 index 000000000000..dee653989e3a --- /dev/null +++ b/drivers/mfd/axp20x.c @@ -0,0 +1,258 @@ +/* + * axp20x.c - MFD core driver for the X-Powers AXP202 and AXP209 + * + * AXP20x comprises an adaptive USB-Compatible PWM charger, 2 BUCK DC-DC + * converters, 5 LDOs, multiple 12-bit ADCs of voltage, current and temperature + * as well as 4 configurable GPIOs. + * + * Author: Carlo Caione <carlo@caione.org> + * + * 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 <linux/err.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/regulator/consumer.h> +#include <linux/mfd/axp20x.h> +#include <linux/mfd/core.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> + +#define AXP20X_OFF 0x80 + +static const struct regmap_range axp20x_writeable_ranges[] = { + regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ5_STATE), + regmap_reg_range(AXP20X_DCDC_MODE, AXP20X_FG_RES), +}; + +static const struct regmap_range axp20x_volatile_ranges[] = { + regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IRQ5_STATE), +}; + +static const struct regmap_access_table axp20x_writeable_table = { + .yes_ranges = axp20x_writeable_ranges, + .n_yes_ranges = ARRAY_SIZE(axp20x_writeable_ranges), +}; + +static const struct regmap_access_table axp20x_volatile_table = { + .yes_ranges = axp20x_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(axp20x_volatile_ranges), +}; + +static struct resource axp20x_pek_resources[] = { + { + .name = "PEK_DBR", + .start = AXP20X_IRQ_PEK_RIS_EDGE, + .end = AXP20X_IRQ_PEK_RIS_EDGE, + .flags = IORESOURCE_IRQ, + }, { + .name = "PEK_DBF", + .start = AXP20X_IRQ_PEK_FAL_EDGE, + .end = AXP20X_IRQ_PEK_FAL_EDGE, + .flags = IORESOURCE_IRQ, + }, +}; + +static const struct regmap_config axp20x_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .wr_table = &axp20x_writeable_table, + .volatile_table = &axp20x_volatile_table, + .max_register = AXP20X_FG_RES, + .cache_type = REGCACHE_RBTREE, +}; + +#define AXP20X_IRQ(_irq, _off, _mask) \ + [AXP20X_IRQ_##_irq] = { .reg_offset = (_off), .mask = BIT(_mask) } + +static const struct regmap_irq axp20x_regmap_irqs[] = { + AXP20X_IRQ(ACIN_OVER_V, 0, 7), + AXP20X_IRQ(ACIN_PLUGIN, 0, 6), + AXP20X_IRQ(ACIN_REMOVAL, 0, 5), + AXP20X_IRQ(VBUS_OVER_V, 0, 4), + AXP20X_IRQ(VBUS_PLUGIN, 0, 3), + AXP20X_IRQ(VBUS_REMOVAL, 0, 2), + AXP20X_IRQ(VBUS_V_LOW, 0, 1), + AXP20X_IRQ(BATT_PLUGIN, 1, 7), + AXP20X_IRQ(BATT_REMOVAL, 1, 6), + AXP20X_IRQ(BATT_ENT_ACT_MODE, 1, 5), + AXP20X_IRQ(BATT_EXIT_ACT_MODE, 1, 4), + AXP20X_IRQ(CHARG, 1, 3), + AXP20X_IRQ(CHARG_DONE, 1, 2), + AXP20X_IRQ(BATT_TEMP_HIGH, 1, 1), + AXP20X_IRQ(BATT_TEMP_LOW, 1, 0), + AXP20X_IRQ(DIE_TEMP_HIGH, 2, 7), + AXP20X_IRQ(CHARG_I_LOW, 2, 6), + AXP20X_IRQ(DCDC1_V_LONG, 2, 5), + AXP20X_IRQ(DCDC2_V_LONG, 2, 4), + AXP20X_IRQ(DCDC3_V_LONG, 2, 3), + AXP20X_IRQ(PEK_SHORT, 2, 1), + AXP20X_IRQ(PEK_LONG, 2, 0), + AXP20X_IRQ(N_OE_PWR_ON, 3, 7), + AXP20X_IRQ(N_OE_PWR_OFF, 3, 6), + AXP20X_IRQ(VBUS_VALID, 3, 5), + AXP20X_IRQ(VBUS_NOT_VALID, 3, 4), + AXP20X_IRQ(VBUS_SESS_VALID, 3, 3), + AXP20X_IRQ(VBUS_SESS_END, 3, 2), + AXP20X_IRQ(LOW_PWR_LVL1, 3, 1), + AXP20X_IRQ(LOW_PWR_LVL2, 3, 0), + AXP20X_IRQ(TIMER, 4, 7), + AXP20X_IRQ(PEK_RIS_EDGE, 4, 6), + AXP20X_IRQ(PEK_FAL_EDGE, 4, 5), + AXP20X_IRQ(GPIO3_INPUT, 4, 3), + AXP20X_IRQ(GPIO2_INPUT, 4, 2), + AXP20X_IRQ(GPIO1_INPUT, 4, 1), + AXP20X_IRQ(GPIO0_INPUT, 4, 0), +}; + +static const struct of_device_id axp20x_of_match[] = { + { .compatible = "x-powers,axp202", .data = (void *) AXP202_ID }, + { .compatible = "x-powers,axp209", .data = (void *) AXP209_ID }, + { }, +}; +MODULE_DEVICE_TABLE(of, axp20x_of_match); + +/* + * This is useless for OF-enabled devices, but it is needed by I2C subsystem + */ +static const struct i2c_device_id axp20x_i2c_id[] = { + { }, +}; +MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id); + +static const struct regmap_irq_chip axp20x_regmap_irq_chip = { + .name = "axp20x_irq_chip", + .status_base = AXP20X_IRQ1_STATE, + .ack_base = AXP20X_IRQ1_STATE, + .mask_base = AXP20X_IRQ1_EN, + .num_regs = 5, + .irqs = axp20x_regmap_irqs, + .num_irqs = ARRAY_SIZE(axp20x_regmap_irqs), + .mask_invert = true, + .init_ack_masked = true, +}; + +static const char * const axp20x_supplies[] = { + "acin", + "vin2", + "vin3", + "ldo24in", + "ldo3in", + "ldo5in", +}; + +static struct mfd_cell axp20x_cells[] = { + { + .name = "axp20x-pek", + .num_resources = ARRAY_SIZE(axp20x_pek_resources), + .resources = axp20x_pek_resources, + }, { + .name = "axp20x-regulator", + .parent_supplies = axp20x_supplies, + .num_parent_supplies = ARRAY_SIZE(axp20x_supplies), + }, +}; + +static struct axp20x_dev *axp20x_pm_power_off; +static void axp20x_power_off(void) +{ + regmap_write(axp20x_pm_power_off->regmap, AXP20X_OFF_CTRL, + AXP20X_OFF); +} + +static int axp20x_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct axp20x_dev *axp20x; + const struct of_device_id *of_id; + int ret; + + axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL); + if (!axp20x) + return -ENOMEM; + + of_id = of_match_device(axp20x_of_match, &i2c->dev); + if (!of_id) { + dev_err(&i2c->dev, "Unable to setup AXP20X data\n"); + return -ENODEV; + } + axp20x->variant = (long) of_id->data; + + axp20x->i2c_client = i2c; + axp20x->dev = &i2c->dev; + dev_set_drvdata(axp20x->dev, axp20x); + + axp20x->regmap = devm_regmap_init_i2c(i2c, &axp20x_regmap_config); + if (IS_ERR(axp20x->regmap)) { + ret = PTR_ERR(axp20x->regmap); + dev_err(&i2c->dev, "regmap init failed: %d\n", ret); + return ret; + } + + ret = regmap_add_irq_chip(axp20x->regmap, i2c->irq, + IRQF_ONESHOT | IRQF_SHARED, -1, + &axp20x_regmap_irq_chip, + &axp20x->regmap_irqc); + if (ret) { + dev_err(&i2c->dev, "failed to add irq chip: %d\n", ret); + return ret; + } + + ret = mfd_add_devices(axp20x->dev, -1, axp20x_cells, + ARRAY_SIZE(axp20x_cells), NULL, 0, NULL); + + if (ret) { + dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret); + regmap_del_irq_chip(i2c->irq, axp20x->regmap_irqc); + return ret; + } + + if (!pm_power_off) { + axp20x_pm_power_off = axp20x; + pm_power_off = axp20x_power_off; + } + + dev_info(&i2c->dev, "AXP20X driver loaded\n"); + + return 0; +} + +static int axp20x_i2c_remove(struct i2c_client *i2c) +{ + struct axp20x_dev *axp20x = i2c_get_clientdata(i2c); + + if (axp20x == axp20x_pm_power_off) { + axp20x_pm_power_off = NULL; + pm_power_off = NULL; + } + + mfd_remove_devices(axp20x->dev); + regmap_del_irq_chip(axp20x->i2c_client->irq, axp20x->regmap_irqc); + + return 0; +} + +static struct i2c_driver axp20x_i2c_driver = { + .driver = { + .name = "axp20x", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(axp20x_of_match), + }, + .probe = axp20x_i2c_probe, + .remove = axp20x_i2c_remove, + .id_table = axp20x_i2c_id, +}; + +module_i2c_driver(axp20x_i2c_driver); + +MODULE_DESCRIPTION("PMIC MFD core driver for AXP20X"); +MODULE_AUTHOR("Carlo Caione <carlo@caione.org>"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h new file mode 100644 index 000000000000..d0e31a2287ac --- /dev/null +++ b/include/linux/mfd/axp20x.h @@ -0,0 +1,180 @@ +/* + * Functions and registers to access AXP20X power management chip. + * + * Copyright (C) 2013, Carlo Caione <carlo@caione.org> + * + * 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. + */ + +#ifndef __LINUX_MFD_AXP20X_H +#define __LINUX_MFD_AXP20X_H + +enum { + AXP202_ID = 0, + AXP209_ID, +}; + +#define AXP20X_DATACACHE(m) (0x04 + (m)) + +/* Power supply */ +#define AXP20X_PWR_INPUT_STATUS 0x00 +#define AXP20X_PWR_OP_MODE 0x01 +#define AXP20X_USB_OTG_STATUS 0x02 +#define AXP20X_PWR_OUT_CTRL 0x12 +#define AXP20X_DCDC2_V_OUT 0x23 +#define AXP20X_DCDC2_LDO3_V_SCAL 0x25 +#define AXP20X_DCDC3_V_OUT 0x27 +#define AXP20X_LDO24_V_OUT 0x28 +#define AXP20X_LDO3_V_OUT 0x29 +#define AXP20X_VBUS_IPSOUT_MGMT 0x30 +#define AXP20X_V_OFF 0x31 +#define AXP20X_OFF_CTRL 0x32 +#define AXP20X_CHRG_CTRL1 0x33 +#define AXP20X_CHRG_CTRL2 0x34 +#define AXP20X_CHRG_BAK_CTRL 0x35 +#define AXP20X_PEK_KEY 0x36 +#define AXP20X_DCDC_FREQ 0x37 +#define AXP20X_V_LTF_CHRG 0x38 +#define AXP20X_V_HTF_CHRG 0x39 +#define AXP20X_APS_WARN_L1 0x3a +#define AXP20X_APS_WARN_L2 0x3b +#define AXP20X_V_LTF_DISCHRG 0x3c +#define AXP20X_V_HTF_DISCHRG 0x3d + +/* Interrupt */ +#define AXP20X_IRQ1_EN 0x40 +#define AXP20X_IRQ2_EN 0x41 +#define AXP20X_IRQ3_EN 0x42 +#define AXP20X_IRQ4_EN 0x43 +#define AXP20X_IRQ5_EN 0x44 +#define AXP20X_IRQ1_STATE 0x48 +#define AXP20X_IRQ2_STATE 0x49 +#define AXP20X_IRQ3_STATE 0x4a +#define AXP20X_IRQ4_STATE 0x4b +#define AXP20X_IRQ5_STATE 0x4c + +/* ADC */ +#define AXP20X_ACIN_V_ADC_H 0x56 +#define AXP20X_ACIN_V_ADC_L 0x57 +#define AXP20X_ACIN_I_ADC_H 0x58 +#define AXP20X_ACIN_I_ADC_L 0x59 +#define AXP20X_VBUS_V_ADC_H 0x5a +#define AXP20X_VBUS_V_ADC_L 0x5b +#define AXP20X_VBUS_I_ADC_H 0x5c +#define AXP20X_VBUS_I_ADC_L 0x5d +#define AXP20X_TEMP_ADC_H 0x5e +#define AXP20X_TEMP_ADC_L 0x5f +#define AXP20X_TS_IN_H 0x62 +#define AXP20X_TS_IN_L 0x63 +#define AXP20X_GPIO0_V_ADC_H 0x64 +#define AXP20X_GPIO0_V_ADC_L 0x65 +#define AXP20X_GPIO1_V_ADC_H 0x66 +#define AXP20X_GPIO1_V_ADC_L 0x67 +#define AXP20X_PWR_BATT_H 0x70 +#define AXP20X_PWR_BATT_M 0x71 +#define AXP20X_PWR_BATT_L 0x72 +#define AXP20X_BATT_V_H 0x78 +#define AXP20X_BATT_V_L 0x79 +#define AXP20X_BATT_CHRG_I_H 0x7a +#define AXP20X_BATT_CHRG_I_L 0x7b +#define AXP20X_BATT_DISCHRG_I_H 0x7c +#define AXP20X_BATT_DISCHRG_I_L 0x7d +#define AXP20X_IPSOUT_V_HIGH_H 0x7e +#define AXP20X_IPSOUT_V_HIGH_L 0x7f + +/* Power supply */ +#define AXP20X_DCDC_MODE 0x80 +#define AXP20X_ADC_EN1 0x82 +#define AXP20X_ADC_EN2 0x83 +#define AXP20X_ADC_RATE 0x84 +#define AXP20X_GPIO10_IN_RANGE 0x85 +#define AXP20X_GPIO1_ADC_IRQ_RIS 0x86 +#define AXP20X_GPIO1_ADC_IRQ_FAL 0x87 +#define AXP20X_TIMER_CTRL 0x8a +#define AXP20X_VBUS_MON 0x8b +#define AXP20X_OVER_TMP 0x8f + +/* GPIO */ +#define AXP20X_GPIO0_CTRL 0x90 +#define AXP20X_LDO5_V_OUT 0x91 +#define AXP20X_GPIO1_CTRL 0x92 +#define AXP20X_GPIO2_CTRL 0x93 +#define AXP20X_GPIO20_SS 0x94 +#define AXP20X_GPIO3_CTRL 0x95 + +/* Battery */ +#define AXP20X_CHRG_CC_31_24 0xb0 +#define AXP20X_CHRG_CC_23_16 0xb1 +#define AXP20X_CHRG_CC_15_8 0xb2 +#define AXP20X_CHRG_CC_7_0 0xb3 +#define AXP20X_DISCHRG_CC_31_24 0xb4 +#define AXP20X_DISCHRG_CC_23_16 0xb5 +#define AXP20X_DISCHRG_CC_15_8 0xb6 +#define AXP20X_DISCHRG_CC_7_0 0xb7 +#define AXP20X_CC_CTRL 0xb8 +#define AXP20X_FG_RES 0xb9 + +/* Regulators IDs */ +enum { + AXP20X_LDO1 = 0, + AXP20X_LDO2, + AXP20X_LDO3, + AXP20X_LDO4, + AXP20X_LDO5, + AXP20X_DCDC2, + AXP20X_DCDC3, + AXP20X_REG_ID_MAX, +}; + +/* IRQs */ +enum { + AXP20X_IRQ_ACIN_OVER_V = 1, + AXP20X_IRQ_ACIN_PLUGIN, + AXP20X_IRQ_ACIN_REMOVAL, + AXP20X_IRQ_VBUS_OVER_V, + AXP20X_IRQ_VBUS_PLUGIN, + AXP20X_IRQ_VBUS_REMOVAL, + AXP20X_IRQ_VBUS_V_LOW, + AXP20X_IRQ_BATT_PLUGIN, + AXP20X_IRQ_BATT_REMOVAL, + AXP20X_IRQ_BATT_ENT_ACT_MODE, + AXP20X_IRQ_BATT_EXIT_ACT_MODE, + AXP20X_IRQ_CHARG, + AXP20X_IRQ_CHARG_DONE, + AXP20X_IRQ_BATT_TEMP_HIGH, + AXP20X_IRQ_BATT_TEMP_LOW, + AXP20X_IRQ_DIE_TEMP_HIGH, + AXP20X_IRQ_CHARG_I_LOW, + AXP20X_IRQ_DCDC1_V_LONG, + AXP20X_IRQ_DCDC2_V_LONG, + AXP20X_IRQ_DCDC3_V_LONG, + AXP20X_IRQ_PEK_SHORT = 22, + AXP20X_IRQ_PEK_LONG, + AXP20X_IRQ_N_OE_PWR_ON, + AXP20X_IRQ_N_OE_PWR_OFF, + AXP20X_IRQ_VBUS_VALID, + AXP20X_IRQ_VBUS_NOT_VALID, + AXP20X_IRQ_VBUS_SESS_VALID, + AXP20X_IRQ_VBUS_SESS_END, + AXP20X_IRQ_LOW_PWR_LVL1, + AXP20X_IRQ_LOW_PWR_LVL2, + AXP20X_IRQ_TIMER, + AXP20X_IRQ_PEK_RIS_EDGE, + AXP20X_IRQ_PEK_FAL_EDGE, + AXP20X_IRQ_GPIO3_INPUT, + AXP20X_IRQ_GPIO2_INPUT, + AXP20X_IRQ_GPIO1_INPUT, + AXP20X_IRQ_GPIO0_INPUT, +}; + +struct axp20x_dev { + struct device *dev; + struct i2c_client *i2c_client; + struct regmap *regmap; + struct regmap_irq_chip_data *regmap_irqc; + long variant; +}; + +#endif /* __LINUX_MFD_AXP20X_H */ |