--- /dev/null
+From 509326e0138b762067904c0c60f818e9bdba4cd4 Mon Sep 17 00:00:00 2001
+From: Carlo Caione <carlo@caione.org>
+Date: Sat, 1 Mar 2014 17:45:46 +0100
+Subject: [PATCH] mfd: AXP20x: Add mfd driver for AXP20x PMIC
+
+This patch introduces the preliminary support for PMICs X-Powers AXP202
+and AXP209. The AXP209 and AXP202 are the PMUs (Power Management Unit)
+used by A10, A13 and A20 SoCs and developed by X-Powers, a sister company
+of Allwinner.
+
+The core enables support for two subsystems:
+- PEK (Power Enable Key)
+- Regulators
+
+Signed-off-by: Carlo Caione <carlo@caione.org>
+---
+ arch/arm/configs/sunxi_defconfig | 1 +
+ drivers/mfd/Kconfig | 12 ++
+ drivers/mfd/Makefile | 1 +
+ drivers/mfd/axp20x.c | 250 +++++++++++++++++++++++++++++++++++++++
+ include/linux/mfd/axp20x.h | 180 ++++++++++++++++++++++++++++
+ 5 files changed, 444 insertions(+)
+ create mode 100644 drivers/mfd/axp20x.c
+ create mode 100644 include/linux/mfd/axp20x.h
+
+diff --git a/arch/arm/configs/sunxi_defconfig b/arch/arm/configs/sunxi_defconfig
+index b5df4a5..d25660d 100644
+--- a/arch/arm/configs/sunxi_defconfig
++++ b/arch/arm/configs/sunxi_defconfig
+@@ -55,6 +55,7 @@ CONFIG_GPIO_SYSFS=y
+ # CONFIG_HWMON is not set
+ CONFIG_WATCHDOG=y
+ CONFIG_SUNXI_WATCHDOG=y
++CONFIG_MFD_AXP20X=y
+ # CONFIG_USB_SUPPORT is not set
+ CONFIG_NEW_LEDS=y
+ CONFIG_LEDS_CLASS=y
+diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
+index 49bb445..24ba61a 100644
+--- a/drivers/mfd/Kconfig
++++ b/drivers/mfd/Kconfig
+@@ -59,6 +59,18 @@ config MFD_AAT2870_CORE
+ additional drivers must be enabled in order to use the
+ functionality of the device.
+
++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 AXP20X.
++ This driver provides common support for accessing the device,
++ additional drivers must be enabled in order to use the
++ functionality of the device.
++
+ config MFD_CROS_EC
+ tristate "ChromeOS Embedded Controller"
+ select MFD_CORE
+diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
+index 5aea5ef..fb773b5 100644
+--- a/drivers/mfd/Makefile
++++ b/drivers/mfd/Makefile
+@@ -101,6 +101,7 @@ 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 0000000..92e5b0f
+--- /dev/null
++++ b/drivers/mfd/axp20x.c
+@@ -0,0 +1,250 @@
++/*
++ * axp20x.c - mfd core driver for the X-Powers AXP202 and AXP209
++ *
++ * 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 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 struct mfd_cell axp20x_cells[] = {
++ {
++ .name = "axp20x-pek",
++ .of_compatible = "x-powers,axp20x-pek",
++ .num_resources = ARRAY_SIZE(axp20x_pek_resources),
++ .resources = axp20x_pek_resources,
++ }, {
++ .name = "axp20x-regulator",
++ },
++};
++
++const struct of_device_id axp20x_of_match[] = {
++ { .compatible = "x-powers,axp202", .data = (void *) AXP202_ID },
++ { .compatible = "x-powers,axp209", .data = (void *) AXP209_ID },
++ { },
++};
++
++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;
++ struct device_node *node = i2c->dev.of_node;
++ 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 = (int) 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;
++ }
++
++ axp20x->irq = i2c->irq;
++ ret = regmap_add_irq_chip(axp20x->regmap, axp20x->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);
++ goto mfd_err;
++ }
++
++ axp20x->pm_off = of_property_read_bool(node, "axp,system-power-controller");
++
++ if (axp20x->pm_off && !pm_power_off) {
++ axp20x_pm_power_off = axp20x;
++ pm_power_off = axp20x_power_off;
++ }
++
++ dev_info(&i2c->dev, "AXP20X driver loaded\n");
++
++ return 0;
++
++mfd_err:
++ regmap_del_irq_chip(axp20x->irq, axp20x->regmap_irqc);
++
++ return ret;
++}
++
++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 const struct i2c_device_id axp20x_i2c_id[] = {
++ { "axp202", AXP202_ID },
++ { "axp209", AXP209_ID },
++ { }
++};
++MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
++
++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 0000000..fcef32c
+--- /dev/null
++++ b/include/linux/mfd/axp20x.h
+@@ -0,0 +1,180 @@
++/*
++ * Functions 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
++
++#define AXP202_ID 0
++#define AXP209_ID 1
++
++#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;
++ int variant;
++ int irq;
++ bool pm_off;
++};
++
++#endif /* __LINUX_MFD_AXP20X_H */
+--
+2.0.3
+
projects / openwrt / openwrt.git / blobdiff