/* * 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");