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(fwnode: 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(map: priv->regmap, TPS6105X_REG_0, |
32 | TPS6105X_REG0_TORCHC_MASK, |
33 | val: 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(dev: &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(dev: &pdev->dev, size: 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(dev: 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(map: 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(parent: &pdev->dev, led_cdev: &priv->cdev, |
75 | init_data: &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" ); |
90 | |