Sven Van Asbroeck | b3b42b4 | 2019-12-16 09:32:58 -0500 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * Copyright (C) 2019 Sven Van Asbroeck |
| 4 | */ |
| 5 | |
| 6 | #include <linux/leds.h> |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/platform_device.h> |
| 9 | #include <linux/mfd/tps6105x.h> |
| 10 | #include <linux/regmap.h> |
| 11 | |
| 12 | struct tps6105x_priv { |
| 13 | struct regmap *regmap; |
| 14 | struct led_classdev cdev; |
| 15 | struct fwnode_handle *fwnode; |
| 16 | }; |
| 17 | |
| 18 | static void tps6105x_handle_put(void *data) |
| 19 | { |
| 20 | struct tps6105x_priv *priv = data; |
| 21 | |
| 22 | fwnode_handle_put(priv->fwnode); |
| 23 | } |
| 24 | |
| 25 | static int tps6105x_brightness_set(struct led_classdev *cdev, |
| 26 | enum led_brightness brightness) |
| 27 | { |
| 28 | struct tps6105x_priv *priv = container_of(cdev, struct tps6105x_priv, |
| 29 | cdev); |
| 30 | |
| 31 | return regmap_update_bits(priv->regmap, TPS6105X_REG_0, |
| 32 | TPS6105X_REG0_TORCHC_MASK, |
| 33 | brightness << TPS6105X_REG0_TORCHC_SHIFT); |
| 34 | } |
| 35 | |
| 36 | static int tps6105x_led_probe(struct platform_device *pdev) |
| 37 | { |
| 38 | struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev); |
| 39 | struct tps6105x_platform_data *pdata = tps6105x->pdata; |
| 40 | struct led_init_data init_data = { }; |
| 41 | struct tps6105x_priv *priv; |
| 42 | int ret; |
| 43 | |
| 44 | /* This instance is not set for torch mode so bail out */ |
| 45 | if (pdata->mode != TPS6105X_MODE_TORCH) { |
| 46 | dev_info(&pdev->dev, |
| 47 | "chip not in torch mode, exit probe"); |
| 48 | return -EINVAL; |
| 49 | } |
| 50 | |
| 51 | priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); |
| 52 | if (!priv) |
| 53 | return -ENOMEM; |
| 54 | /* fwnode/devicetree is optional. NULL is allowed for priv->fwnode */ |
| 55 | priv->fwnode = device_get_next_child_node(pdev->dev.parent, NULL); |
| 56 | ret = devm_add_action_or_reset(&pdev->dev, tps6105x_handle_put, priv); |
| 57 | if (ret) |
| 58 | return ret; |
| 59 | priv->regmap = tps6105x->regmap; |
| 60 | priv->cdev.brightness_set_blocking = tps6105x_brightness_set; |
| 61 | priv->cdev.max_brightness = 7; |
| 62 | init_data.devicename = "tps6105x"; |
| 63 | init_data.default_label = ":torch"; |
| 64 | init_data.fwnode = priv->fwnode; |
| 65 | |
| 66 | ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0, |
| 67 | TPS6105X_REG0_MODE_MASK | |
| 68 | TPS6105X_REG0_TORCHC_MASK, |
| 69 | TPS6105X_REG0_MODE_TORCH << |
| 70 | TPS6105X_REG0_MODE_SHIFT); |
| 71 | if (ret) |
| 72 | return ret; |
| 73 | |
| 74 | return devm_led_classdev_register_ext(&pdev->dev, &priv->cdev, |
| 75 | &init_data); |
| 76 | } |
| 77 | |
| 78 | static struct platform_driver led_driver = { |
| 79 | .probe = tps6105x_led_probe, |
| 80 | .driver = { |
| 81 | .name = "tps6105x-leds", |
| 82 | }, |
| 83 | }; |
| 84 | |
| 85 | module_platform_driver(led_driver); |
| 86 | |
| 87 | MODULE_DESCRIPTION("TPS6105x LED driver"); |
| 88 | MODULE_AUTHOR("Sven Van Asbroeck <TheSven73@gmail.com>"); |
| 89 | MODULE_LICENSE("GPL v2"); |