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b3b42b4a SVA |
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"); |