This patch introduces preliminary support for the X-Powers AXP221 PMIC.
The AXP221 is typically used on boards using Allwinner's A31 SoC.
At the moment, this driver only exposes regulator devices, but other
subdevices.
Signed-off-by: Boris BREZILLON <boris.brezil...@free-electrons.com>
---
drivers/mfd/Kconfig | 12 +++
drivers/mfd/Makefile | 1 +
drivers/mfd/axp22x.c | 237 +++++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/axp22x.h | 149 ++++++++++++++++++++++++++++
4 files changed, 399 insertions(+)
create mode 100644 drivers/mfd/axp22x.c
create mode 100644 include/linux/mfd/axp22x.h
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.brezil...@free-electrons.com>
+ *
+ * Derived from drivers/mfd/axp20x.c:
+ * Author: Carlo Caione <ca...@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.brezil...@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 <ca...@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 */
--
1.8.3.2
--
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