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