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After reading the data from the DEVICE_ID register, mask 0x0f needs to be applied to extract the revision of the chip [1]. The other part of the DEVICE_ID register, mask 0xf0, is a vendor identification code. That's how it is set up at similar products of Richtek, e.g. RT9455 [2] page 21 top. [1] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/mfd/rt5033_core.c#L484 [2] https://www.richtek.com/assets/product_file/RT9455/DS9455-00.pdf Signed-off-by: Jakob Hauser <jahau@rocketmail.com> Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/9a98521ffdf76851d5d344afa6ce65f692ecc024.1684182964.git.jahau@rocketmail.com
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#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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.unmask_base = RT5033_REG_PMIC_IRQ_CTRL,
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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-led",
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.of_compatible = "richtek,rt5033-led",
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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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{
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struct rt5033_dev *rt5033;
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unsigned int dev_id, chip_rev;
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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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chip_rev = dev_id & RT5033_CHIP_REV_MASK;
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dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev);
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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 = devm_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 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 = rt5033_dt_match,
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},
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.probe_new = rt5033_i2c_probe,
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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_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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