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linux-sg2042/drivers/mfd/axp20x.c

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/*
* 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 struct mfd_cell axp20x_cells[] = {
{
.name = "axp20x-pek",
.num_resources = ARRAY_SIZE(axp20x_pek_resources),
.resources = axp20x_pek_resources,
}, {
.name = "axp20x-regulator",
},
};
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");
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