502 lines
14 KiB
C
502 lines
14 KiB
C
/*
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* axp20x.c - MFD core driver for the X-Powers' Power Management ICs
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*
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* AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
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* converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
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* as well as configurable GPIOs.
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*
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* Author: Carlo Caione <carlo@caione.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/regulator/consumer.h>
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#include <linux/mfd/axp20x.h>
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#include <linux/mfd/core.h>
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#include <linux/of_device.h>
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#include <linux/of_irq.h>
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#include <linux/acpi.h>
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#define AXP20X_OFF 0x80
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static const char const *axp20x_model_names[] = {
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"AXP202",
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"AXP209",
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"AXP288",
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};
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static const struct regmap_range axp20x_writeable_ranges[] = {
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regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ5_STATE),
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regmap_reg_range(AXP20X_DCDC_MODE, AXP20X_FG_RES),
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};
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static const struct regmap_range axp20x_volatile_ranges[] = {
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regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IRQ5_STATE),
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};
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static const struct regmap_access_table axp20x_writeable_table = {
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.yes_ranges = axp20x_writeable_ranges,
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.n_yes_ranges = ARRAY_SIZE(axp20x_writeable_ranges),
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};
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static const struct regmap_access_table axp20x_volatile_table = {
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.yes_ranges = axp20x_volatile_ranges,
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.n_yes_ranges = ARRAY_SIZE(axp20x_volatile_ranges),
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};
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static const struct regmap_range axp288_writeable_ranges[] = {
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regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ6_STATE),
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regmap_reg_range(AXP20X_DCDC_MODE, AXP288_FG_TUNE5),
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};
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static const struct regmap_range axp288_volatile_ranges[] = {
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regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IPSOUT_V_HIGH_L),
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};
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static const struct regmap_access_table axp288_writeable_table = {
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.yes_ranges = axp288_writeable_ranges,
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.n_yes_ranges = ARRAY_SIZE(axp288_writeable_ranges),
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};
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static const struct regmap_access_table axp288_volatile_table = {
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.yes_ranges = axp288_volatile_ranges,
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.n_yes_ranges = ARRAY_SIZE(axp288_volatile_ranges),
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};
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static struct resource axp20x_pek_resources[] = {
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{
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.name = "PEK_DBR",
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.start = AXP20X_IRQ_PEK_RIS_EDGE,
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.end = AXP20X_IRQ_PEK_RIS_EDGE,
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.flags = IORESOURCE_IRQ,
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}, {
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.name = "PEK_DBF",
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.start = AXP20X_IRQ_PEK_FAL_EDGE,
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.end = AXP20X_IRQ_PEK_FAL_EDGE,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource axp288_battery_resources[] = {
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{
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.start = AXP288_IRQ_QWBTU,
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.end = AXP288_IRQ_QWBTU,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_WBTU,
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.end = AXP288_IRQ_WBTU,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_QWBTO,
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.end = AXP288_IRQ_QWBTO,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_WBTO,
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.end = AXP288_IRQ_WBTO,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_WL2,
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.end = AXP288_IRQ_WL2,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_WL1,
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.end = AXP288_IRQ_WL1,
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.flags = IORESOURCE_IRQ,
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},
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};
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static const struct regmap_config axp20x_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.wr_table = &axp20x_writeable_table,
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.volatile_table = &axp20x_volatile_table,
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.max_register = AXP20X_FG_RES,
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.cache_type = REGCACHE_RBTREE,
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};
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static const struct regmap_config axp288_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.wr_table = &axp288_writeable_table,
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.volatile_table = &axp288_volatile_table,
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.max_register = AXP288_FG_TUNE5,
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.cache_type = REGCACHE_RBTREE,
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};
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#define INIT_REGMAP_IRQ(_variant, _irq, _off, _mask) \
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[_variant##_IRQ_##_irq] = { .reg_offset = (_off), .mask = BIT(_mask) }
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static const struct regmap_irq axp20x_regmap_irqs[] = {
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INIT_REGMAP_IRQ(AXP20X, ACIN_OVER_V, 0, 7),
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INIT_REGMAP_IRQ(AXP20X, ACIN_PLUGIN, 0, 6),
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INIT_REGMAP_IRQ(AXP20X, ACIN_REMOVAL, 0, 5),
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INIT_REGMAP_IRQ(AXP20X, VBUS_OVER_V, 0, 4),
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INIT_REGMAP_IRQ(AXP20X, VBUS_PLUGIN, 0, 3),
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INIT_REGMAP_IRQ(AXP20X, VBUS_REMOVAL, 0, 2),
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INIT_REGMAP_IRQ(AXP20X, VBUS_V_LOW, 0, 1),
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INIT_REGMAP_IRQ(AXP20X, BATT_PLUGIN, 1, 7),
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INIT_REGMAP_IRQ(AXP20X, BATT_REMOVAL, 1, 6),
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INIT_REGMAP_IRQ(AXP20X, BATT_ENT_ACT_MODE, 1, 5),
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INIT_REGMAP_IRQ(AXP20X, BATT_EXIT_ACT_MODE, 1, 4),
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INIT_REGMAP_IRQ(AXP20X, CHARG, 1, 3),
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INIT_REGMAP_IRQ(AXP20X, CHARG_DONE, 1, 2),
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INIT_REGMAP_IRQ(AXP20X, BATT_TEMP_HIGH, 1, 1),
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INIT_REGMAP_IRQ(AXP20X, BATT_TEMP_LOW, 1, 0),
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INIT_REGMAP_IRQ(AXP20X, DIE_TEMP_HIGH, 2, 7),
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INIT_REGMAP_IRQ(AXP20X, CHARG_I_LOW, 2, 6),
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INIT_REGMAP_IRQ(AXP20X, DCDC1_V_LONG, 2, 5),
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INIT_REGMAP_IRQ(AXP20X, DCDC2_V_LONG, 2, 4),
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INIT_REGMAP_IRQ(AXP20X, DCDC3_V_LONG, 2, 3),
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INIT_REGMAP_IRQ(AXP20X, PEK_SHORT, 2, 1),
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INIT_REGMAP_IRQ(AXP20X, PEK_LONG, 2, 0),
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INIT_REGMAP_IRQ(AXP20X, N_OE_PWR_ON, 3, 7),
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INIT_REGMAP_IRQ(AXP20X, N_OE_PWR_OFF, 3, 6),
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INIT_REGMAP_IRQ(AXP20X, VBUS_VALID, 3, 5),
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INIT_REGMAP_IRQ(AXP20X, VBUS_NOT_VALID, 3, 4),
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INIT_REGMAP_IRQ(AXP20X, VBUS_SESS_VALID, 3, 3),
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INIT_REGMAP_IRQ(AXP20X, VBUS_SESS_END, 3, 2),
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INIT_REGMAP_IRQ(AXP20X, LOW_PWR_LVL1, 3, 1),
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INIT_REGMAP_IRQ(AXP20X, LOW_PWR_LVL2, 3, 0),
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INIT_REGMAP_IRQ(AXP20X, TIMER, 4, 7),
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INIT_REGMAP_IRQ(AXP20X, PEK_RIS_EDGE, 4, 6),
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INIT_REGMAP_IRQ(AXP20X, PEK_FAL_EDGE, 4, 5),
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INIT_REGMAP_IRQ(AXP20X, GPIO3_INPUT, 4, 3),
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INIT_REGMAP_IRQ(AXP20X, GPIO2_INPUT, 4, 2),
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INIT_REGMAP_IRQ(AXP20X, GPIO1_INPUT, 4, 1),
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INIT_REGMAP_IRQ(AXP20X, GPIO0_INPUT, 4, 0),
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};
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/* some IRQs are compatible with axp20x models */
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static const struct regmap_irq axp288_regmap_irqs[] = {
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INIT_REGMAP_IRQ(AXP288, VBUS_FALL, 0, 2),
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INIT_REGMAP_IRQ(AXP288, VBUS_RISE, 0, 3),
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INIT_REGMAP_IRQ(AXP288, OV, 0, 4),
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INIT_REGMAP_IRQ(AXP288, DONE, 1, 2),
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INIT_REGMAP_IRQ(AXP288, CHARGING, 1, 3),
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INIT_REGMAP_IRQ(AXP288, SAFE_QUIT, 1, 4),
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INIT_REGMAP_IRQ(AXP288, SAFE_ENTER, 1, 5),
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INIT_REGMAP_IRQ(AXP288, ABSENT, 1, 6),
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INIT_REGMAP_IRQ(AXP288, APPEND, 1, 7),
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INIT_REGMAP_IRQ(AXP288, QWBTU, 2, 0),
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INIT_REGMAP_IRQ(AXP288, WBTU, 2, 1),
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INIT_REGMAP_IRQ(AXP288, QWBTO, 2, 2),
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INIT_REGMAP_IRQ(AXP288, WBTO, 2, 3),
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INIT_REGMAP_IRQ(AXP288, QCBTU, 2, 4),
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INIT_REGMAP_IRQ(AXP288, CBTU, 2, 5),
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INIT_REGMAP_IRQ(AXP288, QCBTO, 2, 6),
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INIT_REGMAP_IRQ(AXP288, CBTO, 2, 7),
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INIT_REGMAP_IRQ(AXP288, WL2, 3, 0),
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INIT_REGMAP_IRQ(AXP288, WL1, 3, 1),
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INIT_REGMAP_IRQ(AXP288, GPADC, 3, 2),
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INIT_REGMAP_IRQ(AXP288, OT, 3, 7),
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INIT_REGMAP_IRQ(AXP288, GPIO0, 4, 0),
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INIT_REGMAP_IRQ(AXP288, GPIO1, 4, 1),
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INIT_REGMAP_IRQ(AXP288, POKO, 4, 2),
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INIT_REGMAP_IRQ(AXP288, POKL, 4, 3),
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INIT_REGMAP_IRQ(AXP288, POKS, 4, 4),
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INIT_REGMAP_IRQ(AXP288, POKN, 4, 5),
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INIT_REGMAP_IRQ(AXP288, POKP, 4, 6),
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INIT_REGMAP_IRQ(AXP288, TIMER, 4, 7),
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INIT_REGMAP_IRQ(AXP288, MV_CHNG, 5, 0),
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INIT_REGMAP_IRQ(AXP288, BC_USB_CHNG, 5, 1),
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};
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static const struct of_device_id axp20x_of_match[] = {
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{ .compatible = "x-powers,axp202", .data = (void *) AXP202_ID },
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{ .compatible = "x-powers,axp209", .data = (void *) AXP209_ID },
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{ },
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};
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MODULE_DEVICE_TABLE(of, axp20x_of_match);
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/*
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* This is useless for OF-enabled devices, but it is needed by I2C subsystem
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*/
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static const struct i2c_device_id axp20x_i2c_id[] = {
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
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static const struct acpi_device_id axp20x_acpi_match[] = {
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{
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.id = "INT33F4",
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.driver_data = AXP288_ID,
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},
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, axp20x_acpi_match);
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static const struct regmap_irq_chip axp20x_regmap_irq_chip = {
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.name = "axp20x_irq_chip",
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.status_base = AXP20X_IRQ1_STATE,
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.ack_base = AXP20X_IRQ1_STATE,
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.mask_base = AXP20X_IRQ1_EN,
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.mask_invert = true,
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.init_ack_masked = true,
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.irqs = axp20x_regmap_irqs,
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.num_irqs = ARRAY_SIZE(axp20x_regmap_irqs),
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.num_regs = 5,
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};
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static const struct regmap_irq_chip axp288_regmap_irq_chip = {
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.name = "axp288_irq_chip",
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.status_base = AXP20X_IRQ1_STATE,
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.ack_base = AXP20X_IRQ1_STATE,
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.mask_base = AXP20X_IRQ1_EN,
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.mask_invert = true,
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.init_ack_masked = true,
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.irqs = axp288_regmap_irqs,
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.num_irqs = ARRAY_SIZE(axp288_regmap_irqs),
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.num_regs = 6,
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};
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static struct mfd_cell axp20x_cells[] = {
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{
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.name = "axp20x-pek",
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.num_resources = ARRAY_SIZE(axp20x_pek_resources),
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.resources = axp20x_pek_resources,
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}, {
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.name = "axp20x-regulator",
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},
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};
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static struct resource axp288_adc_resources[] = {
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{
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.name = "GPADC",
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.start = AXP288_IRQ_GPADC,
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.end = AXP288_IRQ_GPADC,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource axp288_charger_resources[] = {
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{
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.start = AXP288_IRQ_OV,
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.end = AXP288_IRQ_OV,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_DONE,
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.end = AXP288_IRQ_DONE,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_CHARGING,
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.end = AXP288_IRQ_CHARGING,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_SAFE_QUIT,
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.end = AXP288_IRQ_SAFE_QUIT,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_SAFE_ENTER,
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.end = AXP288_IRQ_SAFE_ENTER,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_QCBTU,
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.end = AXP288_IRQ_QCBTU,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_CBTU,
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.end = AXP288_IRQ_CBTU,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_QCBTO,
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.end = AXP288_IRQ_QCBTO,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = AXP288_IRQ_CBTO,
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.end = AXP288_IRQ_CBTO,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct mfd_cell axp288_cells[] = {
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{
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.name = "axp288_adc",
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.num_resources = ARRAY_SIZE(axp288_adc_resources),
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.resources = axp288_adc_resources,
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},
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{
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.name = "axp288_charger",
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.num_resources = ARRAY_SIZE(axp288_charger_resources),
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.resources = axp288_charger_resources,
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},
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{
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.name = "axp288_battery",
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.num_resources = ARRAY_SIZE(axp288_battery_resources),
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.resources = axp288_battery_resources,
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},
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{
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.name = "axp288_pmic_acpi",
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},
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};
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static struct axp20x_dev *axp20x_pm_power_off;
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static void axp20x_power_off(void)
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{
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if (axp20x_pm_power_off->variant == AXP288_ID)
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return;
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regmap_write(axp20x_pm_power_off->regmap, AXP20X_OFF_CTRL,
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AXP20X_OFF);
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}
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static int axp20x_match_device(struct axp20x_dev *axp20x, struct device *dev)
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{
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const struct acpi_device_id *acpi_id;
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const struct of_device_id *of_id;
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if (dev->of_node) {
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of_id = of_match_device(axp20x_of_match, dev);
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if (!of_id) {
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dev_err(dev, "Unable to match OF ID\n");
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return -ENODEV;
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}
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axp20x->variant = (long) of_id->data;
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} else {
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acpi_id = acpi_match_device(dev->driver->acpi_match_table, dev);
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if (!acpi_id || !acpi_id->driver_data) {
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dev_err(dev, "Unable to match ACPI ID and data\n");
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return -ENODEV;
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}
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axp20x->variant = (long) acpi_id->driver_data;
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}
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switch (axp20x->variant) {
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case AXP202_ID:
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case AXP209_ID:
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axp20x->nr_cells = ARRAY_SIZE(axp20x_cells);
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axp20x->cells = axp20x_cells;
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axp20x->regmap_cfg = &axp20x_regmap_config;
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axp20x->regmap_irq_chip = &axp20x_regmap_irq_chip;
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break;
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case AXP288_ID:
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axp20x->cells = axp288_cells;
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axp20x->nr_cells = ARRAY_SIZE(axp288_cells);
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axp20x->regmap_cfg = &axp288_regmap_config;
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axp20x->regmap_irq_chip = &axp288_regmap_irq_chip;
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break;
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default:
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dev_err(dev, "unsupported AXP20X ID %lu\n", axp20x->variant);
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return -EINVAL;
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}
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dev_info(dev, "AXP20x variant %s found\n",
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axp20x_model_names[axp20x->variant]);
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return 0;
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}
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static int axp20x_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct axp20x_dev *axp20x;
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int ret;
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axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL);
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if (!axp20x)
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return -ENOMEM;
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ret = axp20x_match_device(axp20x, &i2c->dev);
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if (ret)
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return ret;
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axp20x->i2c_client = i2c;
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axp20x->dev = &i2c->dev;
|
|
dev_set_drvdata(axp20x->dev, axp20x);
|
|
|
|
axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg);
|
|
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,
|
|
axp20x->nr_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),
|
|
.acpi_match_table = ACPI_PTR(axp20x_acpi_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");
|