Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 248 insertions, 0 deletions

diff --git a/drivers/mfd/rohm-bd718x7.c b/drivers/mfd/rohm-bd718x7.c
new file mode 100644
index 000000000..c32c1b6c9
--- /dev/null
+++ b/drivers/mfd/rohm-bd718x7.c
@@ -0,0 +1,248 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// Copyright (C) 2018 ROHM Semiconductors
+//
+// ROHM BD71837MWV and BD71847MWV PMIC driver
+//
+// Datasheet for BD71837MWV available from
+// https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e
+
+#include <linux/gpio_keys.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/rohm-bd718x7.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+static struct gpio_keys_button button = {
+	.code = KEY_POWER,
+	.gpio = -1,
+	.type = EV_KEY,
+};
+
+static struct gpio_keys_platform_data bd718xx_powerkey_data = {
+	.buttons = &button,
+	.nbuttons = 1,
+	.name = "bd718xx-pwrkey",
+};
+
+static struct mfd_cell bd71837_mfd_cells[] = {
+	{
+		.name = "gpio-keys",
+		.platform_data = &bd718xx_powerkey_data,
+		.pdata_size = sizeof(bd718xx_powerkey_data),
+	},
+	{ .name = "bd71837-clk", },
+	{ .name = "bd71837-pmic", },
+};
+
+static struct mfd_cell bd71847_mfd_cells[] = {
+	{
+		.name = "gpio-keys",
+		.platform_data = &bd718xx_powerkey_data,
+		.pdata_size = sizeof(bd718xx_powerkey_data),
+	},
+	{ .name = "bd71847-clk", },
+	{ .name = "bd71847-pmic", },
+};
+
+static const struct regmap_irq bd718xx_irqs[] = {
+	REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK),
+	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK),
+	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK),
+	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK),
+	REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK),
+	REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK),
+	REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK),
+};
+
+static struct regmap_irq_chip bd718xx_irq_chip = {
+	.name = "bd718xx-irq",
+	.irqs = bd718xx_irqs,
+	.num_irqs = ARRAY_SIZE(bd718xx_irqs),
+	.num_regs = 1,
+	.irq_reg_stride = 1,
+	.status_base = BD718XX_REG_IRQ,
+	.mask_base = BD718XX_REG_MIRQ,
+	.ack_base = BD718XX_REG_IRQ,
+	.init_ack_masked = true,
+	.mask_invert = false,
+};
+
+static const struct regmap_range pmic_status_range = {
+	.range_min = BD718XX_REG_IRQ,
+	.range_max = BD718XX_REG_POW_STATE,
+};
+
+static const struct regmap_access_table volatile_regs = {
+	.yes_ranges = &pmic_status_range,
+	.n_yes_ranges = 1,
+};
+
+static const struct regmap_config bd718xx_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.volatile_table = &volatile_regs,
+	.max_register = BD718XX_MAX_REGISTER - 1,
+	.cache_type = REGCACHE_RBTREE,
+};
+
+static int bd718xx_init_press_duration(struct bd718xx *bd718xx)
+{
+	struct device* dev = bd718xx->chip.dev;
+	u32 short_press_ms, long_press_ms;
+	u32 short_press_value, long_press_value;
+	int ret;
+
+	ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms",
+				   &short_press_ms);
+	if (!ret) {
+		short_press_value = min(15u, (short_press_ms + 250) / 500);
+		ret = regmap_update_bits(bd718xx->chip.regmap,
+					 BD718XX_REG_PWRONCONFIG0,
+					 BD718XX_PWRBTN_PRESS_DURATION_MASK,
+					 short_press_value);
+		if (ret) {
+			dev_err(dev, "Failed to init pwron short press\n");
+			return ret;
+		}
+	}
+
+	ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms",
+				   &long_press_ms);
+	if (!ret) {
+		long_press_value = min(15u, (long_press_ms + 500) / 1000);
+		ret = regmap_update_bits(bd718xx->chip.regmap,
+					 BD718XX_REG_PWRONCONFIG1,
+					 BD718XX_PWRBTN_PRESS_DURATION_MASK,
+					 long_press_value);
+		if (ret) {
+			dev_err(dev, "Failed to init pwron long press\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int bd718xx_i2c_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *id)
+{
+	struct bd718xx *bd718xx;
+	int ret;
+	unsigned int chip_type;
+	struct mfd_cell *mfd;
+	int cells;
+
+	if (!i2c->irq) {
+		dev_err(&i2c->dev, "No IRQ configured\n");
+		return -EINVAL;
+	}
+
+	bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL);
+
+	if (!bd718xx)
+		return -ENOMEM;
+
+	bd718xx->chip_irq = i2c->irq;
+	chip_type = (unsigned int)(uintptr_t)
+		    of_device_get_match_data(&i2c->dev);
+	switch (chip_type) {
+	case ROHM_CHIP_TYPE_BD71837:
+		mfd = bd71837_mfd_cells;
+		cells = ARRAY_SIZE(bd71837_mfd_cells);
+		break;
+	case ROHM_CHIP_TYPE_BD71847:
+		mfd = bd71847_mfd_cells;
+		cells = ARRAY_SIZE(bd71847_mfd_cells);
+		break;
+	default:
+		dev_err(&i2c->dev, "Unknown device type");
+		return -EINVAL;
+	}
+	bd718xx->chip.dev = &i2c->dev;
+	dev_set_drvdata(&i2c->dev, bd718xx);
+
+	bd718xx->chip.regmap = devm_regmap_init_i2c(i2c,
+						    &bd718xx_regmap_config);
+	if (IS_ERR(bd718xx->chip.regmap)) {
+		dev_err(&i2c->dev, "regmap initialization failed\n");
+		return PTR_ERR(bd718xx->chip.regmap);
+	}
+
+	ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap,
+				       bd718xx->chip_irq, IRQF_ONESHOT, 0,
+				       &bd718xx_irq_chip, &bd718xx->irq_data);
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to add irq_chip\n");
+		return ret;
+	}
+
+	ret = bd718xx_init_press_duration(bd718xx);
+	if (ret)
+		return ret;
+
+	ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S);
+
+	if (ret < 0) {
+		dev_err(&i2c->dev, "Failed to get the IRQ\n");
+		return ret;
+	}
+
+	button.irq = ret;
+
+	ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO,
+				   mfd, cells, NULL, 0,
+				   regmap_irq_get_domain(bd718xx->irq_data));
+	if (ret)
+		dev_err(&i2c->dev, "Failed to create subdevices\n");
+
+	return ret;
+}
+
+static const struct of_device_id bd718xx_of_match[] = {
+	{
+		.compatible = "rohm,bd71837",
+		.data = (void *)ROHM_CHIP_TYPE_BD71837,
+	},
+	{
+		.compatible = "rohm,bd71847",
+		.data = (void *)ROHM_CHIP_TYPE_BD71847,
+	},
+	{
+		.compatible = "rohm,bd71850",
+		.data = (void *)ROHM_CHIP_TYPE_BD71847,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bd718xx_of_match);
+
+static struct i2c_driver bd718xx_i2c_driver = {
+	.driver = {
+		.name = "rohm-bd718x7",
+		.of_match_table = bd718xx_of_match,
+	},
+	.probe = bd718xx_i2c_probe,
+};
+
+static int __init bd718xx_i2c_init(void)
+{
+	return i2c_add_driver(&bd718xx_i2c_driver);
+}
+
+/* Initialise early so consumer devices can complete system boot */
+subsys_initcall(bd718xx_i2c_init);
+
+static void __exit bd718xx_i2c_exit(void)
+{
+	i2c_del_driver(&bd718xx_i2c_driver);
+}
+module_exit(bd718xx_i2c_exit);
+
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
+MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver");
+MODULE_LICENSE("GPL");