[RFC,1/3] mfd: AXP22x: add support for APX221 PMIC

Message ID	1400176305-22737-2-git-send-email-boris.brezillon@free-electrons.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org> From: Boris BREZILLON <boris.brezillon@free-electrons.com> To: Lee Jones <lee.jones@linaro.org>, Mark Brown <broonie@kernel.org>, Liam Girdwood <lgirdwood@gmail.com>, Samuel Ortiz <sameo@linux.intel.com> Subject: [RFC PATCH 1/3] mfd: AXP22x: add support for APX221 PMIC Date: Thu, 15 May 2014 19:51:43 +0200 Message-Id: <1400176305-22737-2-git-send-email-boris.brezillon@free-electrons.com> In-Reply-To: <1400176305-22737-1-git-send-email-boris.brezillon@free-electrons.com> References: <1400176305-22737-1-git-send-email-boris.brezillon@free-electrons.com> Cc: Boris BREZILLON <boris.brezillon@free-electrons.com>, Hans de Goede <hdegoede@redhat.com>, dev@linux-sunxi.org, linux-kernel@vger.kernel.org, Shuge <shuge@allwinnertech.com>, Carlo Caione <carlo@caione.org>, Maxime Ripard <maxime.ripard@free-electrons.com>, kevin@allwinnertech.com, linux-arm-kernel@lists.infradead.org Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 34d246f..2ee31b41 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -79,6 +79,18 @@ config MFD_AXP20X components like regulators or the PEK (Power Enable Key) under the corresponding menus. +config MFD_AXP22X + bool "X-Powers AXP22X" + 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 AXP221. + 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 df7823c..8b7d2e5 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -104,6 +104,7 @@ 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-$(CONFIG_MFD_AXP22X) += axp22x.o obj-$(CONFIG_MFD_LP3943) += lp3943.o obj-$(CONFIG_MFD_LP8788) += lp8788.o lp8788-irq.o diff --git a/drivers/mfd/axp22x.c b/drivers/mfd/axp22x.c new file mode 100644 index 0000000..c530c9b --- /dev/null +++ b/drivers/mfd/axp22x.c @@ -0,0 +1,237 @@ +/* + * axp22x.c - MFD core driver for the X-Powers AXP221 + * + * AXP22x comprises an adaptive USB-Compatible PWM charger, 5 BUCK DC-DC + * converters, 14 LDOs, multiple 12-bit ADCs of voltage, current and temperature + * as well as 2 configurable GPIOs. + * + * Author: Boris Brezillon <boris.brezillon@free-electrons.com> + * + * Derived from drivers/mfd/axp20x.c: + * 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/axp22x.h> +#include <linux/mfd/core.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> + +#define AXP22X_OFF 0x80 + +static const struct regmap_range axp22x_writeable_ranges[] = { + regmap_reg_range(AXP22X_DATACACHE(0), AXP22X_IRQ5_STATE), + regmap_reg_range(AXP22X_DCDC_MODE, AXP22X_BATLOW_THRES1), +}; + +static const struct regmap_range axp22x_volatile_ranges[] = { + regmap_reg_range(AXP22X_IRQ1_EN, AXP22X_IRQ5_STATE), +}; + +static const struct regmap_access_table axp22x_writeable_table = { + .yes_ranges = axp22x_writeable_ranges, + .n_yes_ranges = ARRAY_SIZE(axp22x_writeable_ranges), +}; + +static const struct regmap_access_table axp22x_volatile_table = { + .yes_ranges = axp22x_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(axp22x_volatile_ranges), +}; + +static const struct regmap_config axp22x_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .wr_table = &axp22x_writeable_table, + .volatile_table = &axp22x_volatile_table, + .max_register = AXP22X_BATLOW_THRES1, + .cache_type = REGCACHE_RBTREE, +}; + +#define AXP22X_IRQ(_irq, _off, _mask) \ + [AXP22X_IRQ_##_irq] = { .reg_offset = (_off), .mask = BIT(_mask) } + +static const struct regmap_irq axp22x_regmap_irqs[] = { + AXP22X_IRQ(ACIN_OVER_V, 0, 7), + AXP22X_IRQ(ACIN_PLUGIN, 0, 6), + AXP22X_IRQ(ACIN_REMOVAL, 0, 5), + AXP22X_IRQ(VBUS_OVER_V, 0, 4), + AXP22X_IRQ(VBUS_PLUGIN, 0, 3), + AXP22X_IRQ(VBUS_REMOVAL, 0, 2), + AXP22X_IRQ(VBUS_V_LOW, 0, 1), + AXP22X_IRQ(BATT_PLUGIN, 1, 7), + AXP22X_IRQ(BATT_REMOVAL, 1, 6), + AXP22X_IRQ(BATT_ENT_ACT_MODE, 1, 5), + AXP22X_IRQ(BATT_EXIT_ACT_MODE, 1, 4), + AXP22X_IRQ(CHARG, 1, 3), + AXP22X_IRQ(CHARG_DONE, 1, 2), + AXP22X_IRQ(BATT_TEMP_HIGH, 1, 1), + AXP22X_IRQ(BATT_TEMP_LOW, 1, 0), + AXP22X_IRQ(DIE_TEMP_HIGH, 2, 7), + AXP22X_IRQ(CHARG_I_LOW, 2, 6), + AXP22X_IRQ(PEK_SHORT, 2, 1), + AXP22X_IRQ(PEK_LONG, 2, 0), + AXP22X_IRQ(LOW_PWR_LVL1, 3, 1), + AXP22X_IRQ(LOW_PWR_LVL2, 3, 0), + AXP22X_IRQ(TIMER, 4, 7), + AXP22X_IRQ(PEK_RIS_EDGE, 4, 6), + AXP22X_IRQ(PEK_FAL_EDGE, 4, 5), + AXP22X_IRQ(GPIO1_INPUT, 4, 1), + AXP22X_IRQ(GPIO0_INPUT, 4, 0), +}; + +static const struct of_device_id axp22x_of_match[] = { + { .compatible = "x-powers,axp221", .data = (void *) AXP221_ID }, + { }, +}; +MODULE_DEVICE_TABLE(of, axp22x_of_match); + +/* + * This is useless for OF-enabled devices, but it is needed by I2C subsystem + */ +static const struct i2c_device_id axp22x_i2c_id[] = { + { }, +}; +MODULE_DEVICE_TABLE(i2c, axp22x_i2c_id); + +static const struct regmap_irq_chip axp22x_regmap_irq_chip = { + .name = "axp22x_irq_chip", + .status_base = AXP22X_IRQ1_STATE, + .ack_base = AXP22X_IRQ1_STATE, + .mask_base = AXP22X_IRQ1_EN, + .num_regs = 5, + .irqs = axp22x_regmap_irqs, + .num_irqs = ARRAY_SIZE(axp22x_regmap_irqs), + .mask_invert = true, + .init_ack_masked = true, +}; + +static const char * const axp22x_supplies[] = { + "vbus", + "acin", + "vin1", + "vin2", + "vin3", + "vin4", + "vin5", + "aldoin", + "dldoin", + "eldoin", + "ldoioin", + "rtcldoin", +}; + +static struct mfd_cell axp22x_cells[] = { + { + .name = "axp22x-regulator", + .parent_supplies = axp22x_supplies, + .num_parent_supplies = ARRAY_SIZE(axp22x_supplies), + }, +}; + +static struct axp22x_dev *axp22x_pm_power_off; +static void axp22x_power_off(void) +{ + regmap_write(axp22x_pm_power_off->regmap, AXP22X_OFF_CTRL, + AXP22X_OFF); +} + +static int axp22x_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct axp22x_dev *axp22x; + const struct of_device_id *of_id; + int ret; + + axp22x = devm_kzalloc(&i2c->dev, sizeof(*axp22x), GFP_KERNEL); + if (!axp22x) + return -ENOMEM; + + of_id = of_match_device(axp22x_of_match, &i2c->dev); + if (!of_id) { + dev_err(&i2c->dev, "Unable to setup AXP22X data\n"); + return -ENODEV; + } + axp22x->variant = (long) of_id->data; + + axp22x->i2c_client = i2c; + axp22x->dev = &i2c->dev; + dev_set_drvdata(axp22x->dev, axp22x); + + axp22x->regmap = devm_regmap_init_i2c(i2c, &axp22x_regmap_config); + if (IS_ERR(axp22x->regmap)) { + ret = PTR_ERR(axp22x->regmap); + dev_err(&i2c->dev, "regmap init failed: %d\n", ret); + return ret; + } + + ret = regmap_add_irq_chip(axp22x->regmap, i2c->irq, + IRQF_ONESHOT | IRQF_SHARED, -1, + &axp22x_regmap_irq_chip, + &axp22x->regmap_irqc); + if (ret) { + dev_err(&i2c->dev, "failed to add irq chip: %d\n", ret); + return ret; + } + + ret = mfd_add_devices(axp22x->dev, -1, axp22x_cells, + ARRAY_SIZE(axp22x_cells), NULL, 0, NULL); + + if (ret) { + dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret); + regmap_del_irq_chip(i2c->irq, axp22x->regmap_irqc); + return ret; + } + + if (!pm_power_off) { + axp22x_pm_power_off = axp22x; + pm_power_off = axp22x_power_off; + } + + dev_info(&i2c->dev, "AXP22X driver loaded\n"); + + return 0; +} + +static int axp22x_i2c_remove(struct i2c_client *i2c) +{ + struct axp22x_dev *axp22x = i2c_get_clientdata(i2c); + + if (axp22x == axp22x_pm_power_off) { + axp22x_pm_power_off = NULL; + pm_power_off = NULL; + } + + mfd_remove_devices(axp22x->dev); + regmap_del_irq_chip(axp22x->i2c_client->irq, axp22x->regmap_irqc); + + return 0; +} + +static struct i2c_driver axp22x_i2c_driver = { + .driver = { + .name = "axp22x", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(axp22x_of_match), + }, + .probe = axp22x_i2c_probe, + .remove = axp22x_i2c_remove, + .id_table = axp22x_i2c_id, +}; + +module_i2c_driver(axp22x_i2c_driver); + +MODULE_DESCRIPTION("PMIC MFD core driver for AXP22X"); +MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/axp22x.h b/include/linux/mfd/axp22x.h new file mode 100644 index 0000000..c75fc35 --- /dev/null +++ b/include/linux/mfd/axp22x.h @@ -0,0 +1,149 @@ +/* + * 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_AXP22X_H +#define __LINUX_MFD_AXP22X_H + +enum { + AXP221_ID, +}; + +#define AXP22X_DATACACHE(m) (0x04 + (m)) + +/* Power supply */ +#define AXP22X_PWR_INPUT_STATUS 0x00 +#define AXP22X_PWR_OP +#define AXP22X_PWR_OUT_CTRL1 0x10 +#define AXP22X_PWR_OUT_CTRL2 0x12 +#define AXP22X_PWR_OUT_CTRL3 0x13 +#define AXP22X_DLDO1_V_OUT 0x15 +#define AXP22X_DLDO2_V_OUT 0x16 +#define AXP22X_DLDO3_V_OUT 0x17 +#define AXP22X_DLDO4_V_OUT 0x18 +#define AXP22X_ELDO1_V_OUT 0x19 +#define AXP22X_ELDO2_V_OUT 0x1a +#define AXP22X_ELDO3_V_OUT 0x1b +#define AXP22X_DC5LDO_V_OUT 0x1c +#define AXP22X_DCDC1_V_OUT 0x21 +#define AXP22X_DCDC2_V_OUT 0x22 +#define AXP22X_DCDC3_V_OUT 0x23 +#define AXP22X_DCDC4_V_OUT 0x24 +#define AXP22X_DCDC5_V_OUT 0x25 +#define AXP22X_DCDC23_V_RAMP_CTRL 0x27 +#define AXP22X_ALDO1_V_OUT 0x28 +#define AXP22X_ALDO2_V_OUT 0x29 +#define AXP22X_ALDO3_V_OUT 0x2a +#define AXP22X_WAKE_UP_V_OFF 0x31 +#define AXP22X_OFF_CTRL 0x32 +#define AXP22X_CHRG_CTRL1 0x33 +#define AXP22X_CHRG_CTRL2 0x34 +#define AXP22X_CHRG_CTRL3 0x35 +#define AXP22X_PEK_KEY 0x36 +#define AXP22X_DCDC_FREQ 0x37 +#define AXP22X_V_LTF_CHRG 0x38 +#define AXP22X_V_HTF_CHRG 0x39 +#define AXP22X_V_LTF_DISCHRG 0x3c +#define AXP22X_V_HTF_DISCHRG 0x3d + +/* Interrupt */ +#define AXP22X_IRQ1_EN 0x40 +#define AXP22X_IRQ2_EN 0x41 +#define AXP22X_IRQ3_EN 0x42 +#define AXP22X_IRQ4_EN 0x43 +#define AXP22X_IRQ5_EN 0x44 +#define AXP22X_IRQ1_STATE 0x48 +#define AXP22X_IRQ2_STATE 0x49 +#define AXP22X_IRQ3_STATE 0x4a +#define AXP22X_IRQ4_STATE 0x4b +#define AXP22X_IRQ5_STATE 0x4c + +/* Power supply */ +#define AXP22X_DCDC_MODE 0x80 +#define AXP22X_ADC_EN1 0x82 +#define AXP22X_ADC_RATE 0x84 +#define AXP22X_TIMER_CTRL 0x8a +#define AXP22X_PWREN_CTRL1 0x8c +#define AXP22X_PWREN_CTRL2 0x8d +#define AXP22X_OVER_TMP 0x8f + +/* GPIO */ +#define AXP22X_GPIO0_CTRL 0x90 +#define AXP22X_LDO_IO0_V_OUT 0x91 +#define AXP22X_GPIO1_CTRL 0x90 +#define AXP22X_LDO_IO1_V_OUT 0x93 +#define AXP22X_GPIO_STATE 0x94 +#define AXP22X_GPIO_PULL_DOWN 0x94 + +/* Battery */ +#define AXP22X_BATLOW_THRES1 0xe6 + +/* Regulators IDs */ +enum { + AXP22X_DCDC1 = 0, + AXP22X_DCDC2, + AXP22X_DCDC3, + AXP22X_DCDC4, + AXP22X_DCDC5, + AXP22X_DC5LDO, + AXP22X_ALDO1, + AXP22X_ALDO2, + AXP22X_ALDO3, + AXP22X_ELDO1, + AXP22X_ELDO2, + AXP22X_ELDO3, + AXP22X_DLDO1, + AXP22X_DLDO2, + AXP22X_DLDO3, + AXP22X_DLDO4, + AXP22X_RTC_LDO, + AXP22X_LDO_IO0, + AXP22X_LDO_IO1, + AXP22X_REG_ID_MAX, +}; + +/* IRQs */ +enum { + AXP22X_IRQ_ACIN_OVER_V = 1, + AXP22X_IRQ_ACIN_PLUGIN, + AXP22X_IRQ_ACIN_REMOVAL, + AXP22X_IRQ_VBUS_OVER_V, + AXP22X_IRQ_VBUS_PLUGIN, + AXP22X_IRQ_VBUS_REMOVAL, + AXP22X_IRQ_VBUS_V_LOW, + AXP22X_IRQ_BATT_PLUGIN, + AXP22X_IRQ_BATT_REMOVAL, + AXP22X_IRQ_BATT_ENT_ACT_MODE, + AXP22X_IRQ_BATT_EXIT_ACT_MODE, + AXP22X_IRQ_CHARG, + AXP22X_IRQ_CHARG_DONE, + AXP22X_IRQ_BATT_TEMP_HIGH, + AXP22X_IRQ_BATT_TEMP_LOW, + AXP22X_IRQ_DIE_TEMP_HIGH, + AXP22X_IRQ_CHARG_I_LOW, + AXP22X_IRQ_PEK_SHORT, + AXP22X_IRQ_PEK_LONG, + AXP22X_IRQ_LOW_PWR_LVL1, + AXP22X_IRQ_LOW_PWR_LVL2, + AXP22X_IRQ_TIMER, + AXP22X_IRQ_PEK_RIS_EDGE, + AXP22X_IRQ_PEK_FAL_EDGE, + AXP22X_IRQ_GPIO1_INPUT, + AXP22X_IRQ_GPIO0_INPUT, +}; + +struct axp22x_dev { + struct device *dev; + struct i2c_client *i2c_client; + struct regmap *regmap; + struct regmap_irq_chip_data *regmap_irqc; + long variant; +}; + +#endif /* __LINUX_MFD_AXP22X_H */

[RFC,1/3] mfd: AXP22x: add support for APX221 PMIC

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