2018-08-03 05:08:14 -06:00
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// SPDX-License-Identifier: GPL-2.0-or-later
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//
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// Copyright (C) 2018 ROHM Semiconductors
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//
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2018-09-14 02:32:26 -06:00
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// ROHM BD71837MWV and BD71847MWV PMIC driver
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2018-08-03 05:08:14 -06:00
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//
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2018-09-14 02:32:26 -06:00
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// Datasheet for BD71837MWV available from
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2018-08-03 05:08:14 -06:00
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// https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e
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2018-09-14 02:27:46 -06:00
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#include <linux/gpio_keys.h>
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2018-08-03 05:08:14 -06:00
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/rohm-bd718x7.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/types.h>
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static struct gpio_keys_button button = {
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.code = KEY_POWER,
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.gpio = -1,
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.type = EV_KEY,
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};
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static struct gpio_keys_platform_data bd718xx_powerkey_data = {
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.buttons = &button,
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.nbuttons = 1,
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.name = "bd718xx-pwrkey",
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};
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static struct mfd_cell bd718xx_mfd_cells[] = {
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{
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.name = "gpio-keys",
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.platform_data = &bd718xx_powerkey_data,
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.pdata_size = sizeof(bd718xx_powerkey_data),
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},
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{ .name = "bd718xx-clk", },
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{ .name = "bd718xx-pmic", },
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};
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2018-09-14 02:32:26 -06:00
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static const struct regmap_irq bd718xx_irqs[] = {
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REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK),
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REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK),
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REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK),
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REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK),
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REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK),
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REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK),
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REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK),
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};
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static struct regmap_irq_chip bd718xx_irq_chip = {
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.name = "bd718xx-irq",
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.irqs = bd718xx_irqs,
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.num_irqs = ARRAY_SIZE(bd718xx_irqs),
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.num_regs = 1,
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.irq_reg_stride = 1,
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.status_base = BD718XX_REG_IRQ,
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.mask_base = BD718XX_REG_MIRQ,
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.ack_base = BD718XX_REG_IRQ,
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.init_ack_masked = true,
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.mask_invert = false,
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};
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static const struct regmap_range pmic_status_range = {
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.range_min = BD718XX_REG_IRQ,
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.range_max = BD718XX_REG_POW_STATE,
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};
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static const struct regmap_access_table volatile_regs = {
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.yes_ranges = &pmic_status_range,
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.n_yes_ranges = 1,
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};
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static const struct regmap_config bd718xx_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.volatile_table = &volatile_regs,
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.max_register = BD718XX_MAX_REGISTER - 1,
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.cache_type = REGCACHE_RBTREE,
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};
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2019-05-21 14:41:14 -06:00
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static int bd718xx_init_press_duration(struct bd718xx *bd718xx)
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{
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struct device* dev = bd718xx->chip.dev;
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u32 short_press_ms, long_press_ms;
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u32 short_press_value, long_press_value;
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int ret;
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ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms",
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&short_press_ms);
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if (!ret) {
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short_press_value = min(15u, (short_press_ms + 250) / 500);
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ret = regmap_update_bits(bd718xx->chip.regmap,
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BD718XX_REG_PWRONCONFIG0,
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BD718XX_PWRBTN_PRESS_DURATION_MASK,
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short_press_value);
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if (ret) {
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dev_err(dev, "Failed to init pwron short press\n");
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return ret;
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}
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}
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ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms",
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&long_press_ms);
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if (!ret) {
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long_press_value = min(15u, (long_press_ms + 500) / 1000);
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ret = regmap_update_bits(bd718xx->chip.regmap,
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BD718XX_REG_PWRONCONFIG1,
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BD718XX_PWRBTN_PRESS_DURATION_MASK,
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long_press_value);
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if (ret) {
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dev_err(dev, "Failed to init pwron long press\n");
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return ret;
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}
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}
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return 0;
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}
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static int bd718xx_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 bd718xx *bd718xx;
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int ret;
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if (!i2c->irq) {
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dev_err(&i2c->dev, "No IRQ configured\n");
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return -EINVAL;
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}
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bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL);
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if (!bd718xx)
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return -ENOMEM;
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2018-09-14 02:32:26 -06:00
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bd718xx->chip_irq = i2c->irq;
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bd718xx->chip.chip_type = (unsigned int)(uintptr_t)
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of_device_get_match_data(&i2c->dev);
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bd718xx->chip.dev = &i2c->dev;
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dev_set_drvdata(&i2c->dev, bd718xx);
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2019-06-03 01:24:32 -06:00
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bd718xx->chip.regmap = devm_regmap_init_i2c(i2c,
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&bd718xx_regmap_config);
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if (IS_ERR(bd718xx->chip.regmap)) {
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dev_err(&i2c->dev, "regmap initialization failed\n");
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return PTR_ERR(bd718xx->chip.regmap);
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}
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2019-06-03 01:24:32 -06:00
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ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap,
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bd718xx->chip_irq, IRQF_ONESHOT, 0,
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&bd718xx_irq_chip, &bd718xx->irq_data);
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if (ret) {
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dev_err(&i2c->dev, "Failed to add irq_chip\n");
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return ret;
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}
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2019-05-21 14:41:14 -06:00
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ret = bd718xx_init_press_duration(bd718xx);
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if (ret)
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return ret;
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2018-09-14 02:32:26 -06:00
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ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S);
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if (ret < 0) {
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dev_err(&i2c->dev, "Failed to get the IRQ\n");
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return ret;
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}
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button.irq = ret;
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2019-06-03 01:24:32 -06:00
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ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO,
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bd718xx_mfd_cells,
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ARRAY_SIZE(bd718xx_mfd_cells), NULL, 0,
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regmap_irq_get_domain(bd718xx->irq_data));
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if (ret)
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dev_err(&i2c->dev, "Failed to create subdevices\n");
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return ret;
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}
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static const struct of_device_id bd718xx_of_match[] = {
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{
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.compatible = "rohm,bd71837",
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.data = (void *)ROHM_CHIP_TYPE_BD71837,
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},
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{
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.compatible = "rohm,bd71847",
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.data = (void *)ROHM_CHIP_TYPE_BD71847,
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},
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{ }
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};
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MODULE_DEVICE_TABLE(of, bd718xx_of_match);
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static struct i2c_driver bd718xx_i2c_driver = {
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.driver = {
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.name = "rohm-bd718x7",
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.of_match_table = bd718xx_of_match,
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},
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.probe = bd718xx_i2c_probe,
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};
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static int __init bd718xx_i2c_init(void)
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{
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return i2c_add_driver(&bd718xx_i2c_driver);
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}
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/* Initialise early so consumer devices can complete system boot */
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subsys_initcall(bd718xx_i2c_init);
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static void __exit bd718xx_i2c_exit(void)
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{
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i2c_del_driver(&bd718xx_i2c_driver);
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}
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module_exit(bd718xx_i2c_exit);
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MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
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MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver");
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MODULE_LICENSE("GPL");
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