1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2019 Sven Van Asbroeck
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/leds.h>
7*4882a593Smuzhiyun #include <linux/module.h>
8*4882a593Smuzhiyun #include <linux/platform_device.h>
9*4882a593Smuzhiyun #include <linux/mfd/tps6105x.h>
10*4882a593Smuzhiyun #include <linux/regmap.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun struct tps6105x_priv {
13*4882a593Smuzhiyun struct regmap *regmap;
14*4882a593Smuzhiyun struct led_classdev cdev;
15*4882a593Smuzhiyun struct fwnode_handle *fwnode;
16*4882a593Smuzhiyun };
17*4882a593Smuzhiyun
tps6105x_handle_put(void * data)18*4882a593Smuzhiyun static void tps6105x_handle_put(void *data)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun struct tps6105x_priv *priv = data;
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun fwnode_handle_put(priv->fwnode);
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
tps6105x_brightness_set(struct led_classdev * cdev,enum led_brightness brightness)25*4882a593Smuzhiyun static int tps6105x_brightness_set(struct led_classdev *cdev,
26*4882a593Smuzhiyun enum led_brightness brightness)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun struct tps6105x_priv *priv = container_of(cdev, struct tps6105x_priv,
29*4882a593Smuzhiyun cdev);
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun return regmap_update_bits(priv->regmap, TPS6105X_REG_0,
32*4882a593Smuzhiyun TPS6105X_REG0_TORCHC_MASK,
33*4882a593Smuzhiyun brightness << TPS6105X_REG0_TORCHC_SHIFT);
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
tps6105x_led_probe(struct platform_device * pdev)36*4882a593Smuzhiyun static int tps6105x_led_probe(struct platform_device *pdev)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
39*4882a593Smuzhiyun struct tps6105x_platform_data *pdata = tps6105x->pdata;
40*4882a593Smuzhiyun struct led_init_data init_data = { };
41*4882a593Smuzhiyun struct tps6105x_priv *priv;
42*4882a593Smuzhiyun int ret;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun /* This instance is not set for torch mode so bail out */
45*4882a593Smuzhiyun if (pdata->mode != TPS6105X_MODE_TORCH) {
46*4882a593Smuzhiyun dev_info(&pdev->dev,
47*4882a593Smuzhiyun "chip not in torch mode, exit probe");
48*4882a593Smuzhiyun return -EINVAL;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
52*4882a593Smuzhiyun if (!priv)
53*4882a593Smuzhiyun return -ENOMEM;
54*4882a593Smuzhiyun /* fwnode/devicetree is optional. NULL is allowed for priv->fwnode */
55*4882a593Smuzhiyun priv->fwnode = device_get_next_child_node(pdev->dev.parent, NULL);
56*4882a593Smuzhiyun ret = devm_add_action_or_reset(&pdev->dev, tps6105x_handle_put, priv);
57*4882a593Smuzhiyun if (ret)
58*4882a593Smuzhiyun return ret;
59*4882a593Smuzhiyun priv->regmap = tps6105x->regmap;
60*4882a593Smuzhiyun priv->cdev.brightness_set_blocking = tps6105x_brightness_set;
61*4882a593Smuzhiyun priv->cdev.max_brightness = 7;
62*4882a593Smuzhiyun init_data.devicename = "tps6105x";
63*4882a593Smuzhiyun init_data.default_label = ":torch";
64*4882a593Smuzhiyun init_data.fwnode = priv->fwnode;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
67*4882a593Smuzhiyun TPS6105X_REG0_MODE_MASK |
68*4882a593Smuzhiyun TPS6105X_REG0_TORCHC_MASK,
69*4882a593Smuzhiyun TPS6105X_REG0_MODE_TORCH <<
70*4882a593Smuzhiyun TPS6105X_REG0_MODE_SHIFT);
71*4882a593Smuzhiyun if (ret)
72*4882a593Smuzhiyun return ret;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun return devm_led_classdev_register_ext(&pdev->dev, &priv->cdev,
75*4882a593Smuzhiyun &init_data);
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun static struct platform_driver led_driver = {
79*4882a593Smuzhiyun .probe = tps6105x_led_probe,
80*4882a593Smuzhiyun .driver = {
81*4882a593Smuzhiyun .name = "tps6105x-leds",
82*4882a593Smuzhiyun },
83*4882a593Smuzhiyun };
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun module_platform_driver(led_driver);
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun MODULE_DESCRIPTION("TPS6105x LED driver");
88*4882a593Smuzhiyun MODULE_AUTHOR("Sven Van Asbroeck <TheSven73@gmail.com>");
89*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
90