Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 207 insertions, 0 deletions

diff --git a/drivers/mfd/tps6105x.c b/drivers/mfd/tps6105x.c
new file mode 100644
index 000000000..187848c93
--- /dev/null
+++ b/drivers/mfd/tps6105x.c
@@ -0,0 +1,207 @@
+/*
+ * Core driver for TPS61050/61052 boost converters, used for while LED
+ * driving, audio power amplification, white LED flash, and generic
+ * boost conversion. Additionally it provides a 1-bit GPIO pin (out or in)
+ * and a flash synchronization pin to synchronize flash events when used as
+ * flashgun.
+ *
+ * Copyright (C) 2011 ST-Ericsson SA
+ * Written on behalf of Linaro for ST-Ericsson
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/gpio.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps6105x.h>
+
+static struct regmap_config tps6105x_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = TPS6105X_REG_3,
+};
+
+static int tps6105x_startup(struct tps6105x *tps6105x)
+{
+	int ret;
+	unsigned int regval;
+
+	ret = regmap_read(tps6105x->regmap, TPS6105X_REG_0, &regval);
+	if (ret)
+		return ret;
+	switch (regval >> TPS6105X_REG0_MODE_SHIFT) {
+	case TPS6105X_REG0_MODE_SHUTDOWN:
+		dev_info(&tps6105x->client->dev,
+			 "TPS6105x found in SHUTDOWN mode\n");
+		break;
+	case TPS6105X_REG0_MODE_TORCH:
+		dev_info(&tps6105x->client->dev,
+			 "TPS6105x found in TORCH mode\n");
+		break;
+	case TPS6105X_REG0_MODE_TORCH_FLASH:
+		dev_info(&tps6105x->client->dev,
+			 "TPS6105x found in FLASH mode\n");
+		break;
+	case TPS6105X_REG0_MODE_VOLTAGE:
+		dev_info(&tps6105x->client->dev,
+			 "TPS6105x found in VOLTAGE mode\n");
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+/*
+ * MFD cells - we always have a GPIO cell and we have one cell
+ * which is selected operation mode.
+ */
+static struct mfd_cell tps6105x_gpio_cell = {
+	.name = "tps6105x-gpio",
+};
+
+static struct mfd_cell tps6105x_leds_cell = {
+	.name = "tps6105x-leds",
+};
+
+static struct mfd_cell tps6105x_flash_cell = {
+	.name = "tps6105x-flash",
+};
+
+static struct mfd_cell tps6105x_regulator_cell = {
+	.name = "tps6105x-regulator",
+};
+
+static int tps6105x_add_device(struct tps6105x *tps6105x,
+			       struct mfd_cell *cell)
+{
+	cell->platform_data = tps6105x;
+	cell->pdata_size = sizeof(*tps6105x);
+
+	return mfd_add_devices(&tps6105x->client->dev,
+			       PLATFORM_DEVID_AUTO, cell, 1, NULL, 0, NULL);
+}
+
+static int tps6105x_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	struct tps6105x			*tps6105x;
+	struct tps6105x_platform_data	*pdata;
+	int ret;
+
+	pdata = dev_get_platdata(&client->dev);
+	if (!pdata) {
+		dev_err(&client->dev, "missing platform data\n");
+		return -ENODEV;
+	}
+
+	tps6105x = devm_kmalloc(&client->dev, sizeof(*tps6105x), GFP_KERNEL);
+	if (!tps6105x)
+		return -ENOMEM;
+
+	tps6105x->regmap = devm_regmap_init_i2c(client, &tps6105x_regmap_config);
+	if (IS_ERR(tps6105x->regmap))
+		return PTR_ERR(tps6105x->regmap);
+
+	i2c_set_clientdata(client, tps6105x);
+	tps6105x->client = client;
+	tps6105x->pdata = pdata;
+
+	ret = tps6105x_startup(tps6105x);
+	if (ret) {
+		dev_err(&client->dev, "chip initialization failed\n");
+		return ret;
+	}
+
+	ret = tps6105x_add_device(tps6105x, &tps6105x_gpio_cell);
+	if (ret)
+		return ret;
+
+	switch (pdata->mode) {
+	case TPS6105X_MODE_SHUTDOWN:
+		dev_info(&client->dev,
+			 "present, not used for anything, only GPIO\n");
+		break;
+	case TPS6105X_MODE_TORCH:
+		ret = tps6105x_add_device(tps6105x, &tps6105x_leds_cell);
+		break;
+	case TPS6105X_MODE_TORCH_FLASH:
+		ret = tps6105x_add_device(tps6105x, &tps6105x_flash_cell);
+		break;
+	case TPS6105X_MODE_VOLTAGE:
+		ret = tps6105x_add_device(tps6105x, &tps6105x_regulator_cell);
+		break;
+	default:
+		dev_warn(&client->dev, "invalid mode: %d\n", pdata->mode);
+		break;
+	}
+
+	if (ret)
+		mfd_remove_devices(&client->dev);
+
+	return ret;
+}
+
+static int tps6105x_remove(struct i2c_client *client)
+{
+	struct tps6105x *tps6105x = i2c_get_clientdata(client);
+
+	mfd_remove_devices(&client->dev);
+
+	/* Put chip in shutdown mode */
+	regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
+		TPS6105X_REG0_MODE_MASK,
+		TPS6105X_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
+
+	return 0;
+}
+
+static const struct i2c_device_id tps6105x_id[] = {
+	{ "tps61050", 0 },
+	{ "tps61052", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, tps6105x_id);
+
+static const struct of_device_id tps6105x_of_match[] = {
+	{ .compatible = "ti,tps61050" },
+	{ .compatible = "ti,tps61052" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, tps6105x_of_match);
+
+static struct i2c_driver tps6105x_driver = {
+	.driver = {
+		.name	= "tps6105x",
+		.of_match_table = tps6105x_of_match,
+	},
+	.probe		= tps6105x_probe,
+	.remove		= tps6105x_remove,
+	.id_table	= tps6105x_id,
+};
+
+static int __init tps6105x_init(void)
+{
+	return i2c_add_driver(&tps6105x_driver);
+}
+subsys_initcall(tps6105x_init);
+
+static void __exit tps6105x_exit(void)
+{
+	i2c_del_driver(&tps6105x_driver);
+}
+module_exit(tps6105x_exit);
+
+MODULE_AUTHOR("Linus Walleij");
+MODULE_DESCRIPTION("TPS6105x White LED Boost Converter Driver");
+MODULE_LICENSE("GPL v2");