104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* I2C driver for the X-Powers' Power Management ICs
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*
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* AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
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* converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
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* as well as configurable GPIOs.
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*
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* This driver supports the I2C variants.
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*
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* Copyright (C) 2014 Carlo Caione
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*
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* Author: Carlo Caione <carlo@caione.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/acpi.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/mfd/axp20x.h>
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#include <linux/of.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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static int axp20x_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct axp20x_dev *axp20x;
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int ret;
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axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL);
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if (!axp20x)
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return -ENOMEM;
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axp20x->dev = &i2c->dev;
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axp20x->irq = i2c->irq;
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dev_set_drvdata(axp20x->dev, axp20x);
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ret = axp20x_match_device(axp20x);
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if (ret)
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return ret;
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axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg);
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if (IS_ERR(axp20x->regmap)) {
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ret = PTR_ERR(axp20x->regmap);
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dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
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return ret;
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}
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return axp20x_device_probe(axp20x);
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}
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static int axp20x_i2c_remove(struct i2c_client *i2c)
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{
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struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
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return axp20x_device_remove(axp20x);
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}
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static const struct of_device_id axp20x_i2c_of_match[] = {
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{ .compatible = "x-powers,axp152", .data = (void *)AXP152_ID },
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{ .compatible = "x-powers,axp202", .data = (void *)AXP202_ID },
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{ .compatible = "x-powers,axp209", .data = (void *)AXP209_ID },
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{ .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
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{ },
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};
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MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
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/*
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* This is useless for OF-enabled devices, but it is needed by I2C subsystem
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*/
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static const struct i2c_device_id axp20x_i2c_id[] = {
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
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static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
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{
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.id = "INT33F4",
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.driver_data = AXP288_ID,
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},
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
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static struct i2c_driver axp20x_i2c_driver = {
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.driver = {
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.name = "axp20x-i2c",
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.of_match_table = of_match_ptr(axp20x_i2c_of_match),
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.acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
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},
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.probe = axp20x_i2c_probe,
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.remove = axp20x_i2c_remove,
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.id_table = axp20x_i2c_id,
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};
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module_i2c_driver(axp20x_i2c_driver);
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MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
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MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
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MODULE_LICENSE("GPL");
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