mirror of https://gitee.com/openkylin/linux.git
90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2019 Sven Van Asbroeck
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*/
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/tps6105x.h>
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#include <linux/regmap.h>
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struct tps6105x_priv {
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struct regmap *regmap;
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struct led_classdev cdev;
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struct fwnode_handle *fwnode;
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};
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static void tps6105x_handle_put(void *data)
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{
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struct tps6105x_priv *priv = data;
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fwnode_handle_put(priv->fwnode);
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}
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static int tps6105x_brightness_set(struct led_classdev *cdev,
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enum led_brightness brightness)
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{
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struct tps6105x_priv *priv = container_of(cdev, struct tps6105x_priv,
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cdev);
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return regmap_update_bits(priv->regmap, TPS6105X_REG_0,
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TPS6105X_REG0_TORCHC_MASK,
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brightness << TPS6105X_REG0_TORCHC_SHIFT);
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}
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static int tps6105x_led_probe(struct platform_device *pdev)
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{
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struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
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struct tps6105x_platform_data *pdata = tps6105x->pdata;
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struct led_init_data init_data = { };
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struct tps6105x_priv *priv;
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int ret;
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/* This instance is not set for torch mode so bail out */
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if (pdata->mode != TPS6105X_MODE_TORCH) {
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dev_info(&pdev->dev,
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"chip not in torch mode, exit probe");
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return -EINVAL;
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}
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priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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/* fwnode/devicetree is optional. NULL is allowed for priv->fwnode */
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priv->fwnode = device_get_next_child_node(pdev->dev.parent, NULL);
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ret = devm_add_action_or_reset(&pdev->dev, tps6105x_handle_put, priv);
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if (ret)
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return ret;
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priv->regmap = tps6105x->regmap;
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priv->cdev.brightness_set_blocking = tps6105x_brightness_set;
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priv->cdev.max_brightness = 7;
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init_data.devicename = "tps6105x";
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init_data.default_label = ":torch";
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init_data.fwnode = priv->fwnode;
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ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
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TPS6105X_REG0_MODE_MASK |
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TPS6105X_REG0_TORCHC_MASK,
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TPS6105X_REG0_MODE_TORCH <<
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TPS6105X_REG0_MODE_SHIFT);
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if (ret)
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return ret;
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return devm_led_classdev_register_ext(&pdev->dev, &priv->cdev,
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&init_data);
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}
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static struct platform_driver led_driver = {
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.probe = tps6105x_led_probe,
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.driver = {
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.name = "tps6105x-leds",
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},
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};
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module_platform_driver(led_driver);
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MODULE_DESCRIPTION("TPS6105x LED driver");
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MODULE_AUTHOR("Sven Van Asbroeck <TheSven73@gmail.com>");
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MODULE_LICENSE("GPL v2");
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