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![Leonard Crestez](/assets/img/avatar_default.png)
Allow overwriting the values in BD718XX_REG_PWRONCONFIG0 and BD718XX_REG_PWRONCONFIG1 via devicetree. Read values in milliseconds and attempt to round them to something supported by the hardware. Keep existing values (from bootloader or OTP) if property is not present. Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-By: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> [Lee: Fixed-up merge/API conflict] Signed-off-by: Lee Jones <lee.jones@linaro.org>
219 lines
5.6 KiB
C
219 lines
5.6 KiB
C
// 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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// ROHM BD71837MWV and BD71847MWV PMIC driver
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//
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// Datasheet for BD71837MWV available from
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// https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e
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#include <linux/gpio_keys.h>
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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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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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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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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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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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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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ret = bd718xx_init_press_duration(bd718xx);
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if (ret)
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return ret;
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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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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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