4895e493f9
The I2C core always reports the MODALIAS uevent as "i2c:<client name" regardless if the driver was matched using the I2C id_table or the of_match_table. So technically there's no need for a driver to export the OF table since currently it's not used. In fact, the I2C device ID table is mandatory for I2C drivers since a i2c_device_id is passed to the driver's probe function even if the I2C core used the OF table to match the driver. And since the I2C core uses different tables, OF-only drivers needs to have duplicated data that has to be kept in sync and also the dev node compatible manufacturer prefix is stripped when reporting the MODALIAS. To avoid the above, the I2C core behavior may be changed in the future to not require an I2C device table for OF-only drivers and report the OF module alias. So, it's better to also export the OF table to prevent breaking module autoloading if that happens. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
144 lines
3.6 KiB
C
144 lines
3.6 KiB
C
/*
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* MFD core driver for the Richtek RT5033.
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*
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* RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
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* flash LED, current source, LDO and BUCK regulators.
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*
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* Copyright (C) 2014 Samsung Electronics, Co., Ltd.
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* Author: Beomho Seo <beomho.seo@samsung.com>
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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 bythe Free Software Foundation.
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/of_device.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/rt5033.h>
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#include <linux/mfd/rt5033-private.h>
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static const struct regmap_irq rt5033_irqs[] = {
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{ .mask = RT5033_PMIC_IRQ_BUCKOCP, },
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{ .mask = RT5033_PMIC_IRQ_BUCKLV, },
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{ .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
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{ .mask = RT5033_PMIC_IRQ_LDOLV, },
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{ .mask = RT5033_PMIC_IRQ_OT, },
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{ .mask = RT5033_PMIC_IRQ_VDDA_UV, },
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};
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static const struct regmap_irq_chip rt5033_irq_chip = {
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.name = "rt5033",
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.status_base = RT5033_REG_PMIC_IRQ_STAT,
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.mask_base = RT5033_REG_PMIC_IRQ_CTRL,
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.mask_invert = true,
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.num_regs = 1,
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.irqs = rt5033_irqs,
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.num_irqs = ARRAY_SIZE(rt5033_irqs),
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};
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static const struct mfd_cell rt5033_devs[] = {
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{ .name = "rt5033-regulator", },
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{
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.name = "rt5033-charger",
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.of_compatible = "richtek,rt5033-charger",
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}, {
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.name = "rt5033-battery",
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.of_compatible = "richtek,rt5033-battery",
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},
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};
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static const struct regmap_config rt5033_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = RT5033_REG_END,
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};
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static int rt5033_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 rt5033_dev *rt5033;
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unsigned int dev_id;
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int ret;
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rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
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if (!rt5033)
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return -ENOMEM;
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i2c_set_clientdata(i2c, rt5033);
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rt5033->dev = &i2c->dev;
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rt5033->irq = i2c->irq;
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rt5033->wakeup = true;
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rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
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if (IS_ERR(rt5033->regmap)) {
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dev_err(&i2c->dev, "Failed to allocate register map.\n");
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return PTR_ERR(rt5033->regmap);
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}
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ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
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if (ret) {
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dev_err(&i2c->dev, "Device not found\n");
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return -ENODEV;
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}
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dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
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ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
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IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
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0, &rt5033_irq_chip, &rt5033->irq_data);
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if (ret) {
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dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
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rt5033->irq, ret);
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return ret;
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}
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ret = mfd_add_devices(rt5033->dev, -1, rt5033_devs,
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ARRAY_SIZE(rt5033_devs), NULL, 0,
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regmap_irq_get_domain(rt5033->irq_data));
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if (ret < 0) {
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dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
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return ret;
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}
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device_init_wakeup(rt5033->dev, rt5033->wakeup);
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return 0;
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}
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static int rt5033_i2c_remove(struct i2c_client *i2c)
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{
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mfd_remove_devices(&i2c->dev);
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return 0;
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}
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static const struct i2c_device_id rt5033_i2c_id[] = {
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{ "rt5033", },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
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static const struct of_device_id rt5033_dt_match[] = {
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{ .compatible = "richtek,rt5033", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, rt5033_dt_match);
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static struct i2c_driver rt5033_driver = {
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.driver = {
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.name = "rt5033",
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.of_match_table = of_match_ptr(rt5033_dt_match),
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},
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.probe = rt5033_i2c_probe,
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.remove = rt5033_i2c_remove,
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.id_table = rt5033_i2c_id,
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};
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module_i2c_driver(rt5033_driver);
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MODULE_ALIAS("i2c:rt5033");
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MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
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MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
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MODULE_LICENSE("GPL");
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