add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mfd/tps6105x.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Core driver for TPS61050/61052 boost converters, used for while LED
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  * driving, audio power amplification, white LED flash, and generic
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@@ -9,8 +10,6 @@
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  * Written on behalf of Linaro for ST-Ericsson
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  *
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  * Author: Linus Walleij <linus.walleij@linaro.org>
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- *
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- * License terms: GNU General Public License (GPL) version 2
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  */
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 #include <linux/module.h>
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@@ -92,6 +91,32 @@
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 			       PLATFORM_DEVID_AUTO, cell, 1, NULL, 0, NULL);
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 }
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+static struct tps6105x_platform_data *tps6105x_parse_dt(struct device *dev)
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+{
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+	struct device_node *np = dev->of_node;
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+	struct tps6105x_platform_data *pdata;
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+	struct device_node *child;
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+
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+	if (!np)
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+		return ERR_PTR(-EINVAL);
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+	if (of_get_available_child_count(np) > 1) {
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+		dev_err(dev, "cannot support multiple operational modes");
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+		return ERR_PTR(-EINVAL);
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+	}
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+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
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+	if (!pdata)
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+		return ERR_PTR(-ENOMEM);
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+	pdata->mode = TPS6105X_MODE_SHUTDOWN;
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+	for_each_available_child_of_node(np, child) {
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+		if (child->name && !of_node_cmp(child->name, "regulator"))
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+			pdata->mode = TPS6105X_MODE_VOLTAGE;
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+		else if (child->name && !of_node_cmp(child->name, "led"))
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+			pdata->mode = TPS6105X_MODE_TORCH;
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+	}
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+
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+	return pdata;
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+}
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+
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 static int tps6105x_probe(struct i2c_client *client,
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 			const struct i2c_device_id *id)
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 {
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@@ -100,9 +125,11 @@
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 	int ret;
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 	pdata = dev_get_platdata(&client->dev);
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-	if (!pdata) {
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-		dev_err(&client->dev, "missing platform data\n");
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-		return -ENODEV;
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+	if (!pdata)
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+		pdata = tps6105x_parse_dt(&client->dev);
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+	if (IS_ERR(pdata)) {
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+		dev_err(&client->dev, "No platform data or DT found");
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+		return PTR_ERR(pdata);
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 	}
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 	tps6105x = devm_kmalloc(&client->dev, sizeof(*tps6105x), GFP_KERNEL);