Commit b3b42b4a authored by Sven Van Asbroeck's avatar Sven Van Asbroeck Committed by Pavel
Browse files

leds: tps6105x: add driver for MFD chip LED mode 



This driver adds support for the LED operational mode of the
tps6105x MFD device.

Acked-by: default avatarJacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: default avatarSven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: default avatarPavel Machek <pavel@ucw.cz>
parent b0ff9860

drivers/leds/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -836,6 +836,16 @@ config LEDS_LM36274 
	  Say Y to enable the LM36274 LED driver for TI LMU devices.

	  This supports the LED device LM36274.



config LEDS_TPS6105X

	tristate "LED support for TI TPS6105X"

	depends on LEDS_CLASS

	depends on TPS6105X

	default y if TPS6105X

	help

	  This driver supports TPS61050/TPS61052 LED chips.

	  It is a single boost converter primarily for white LEDs and

	  audio amplifiers.



comment "LED Triggers"

source "drivers/leds/trigger/Kconfig"

drivers/leds/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ obj-$(CONFIG_LEDS_LM3601X) += leds-lm3601x.o 
obj-$(CONFIG_LEDS_TI_LMU_COMMON)	+= leds-ti-lmu-common.o

obj-$(CONFIG_LEDS_LM3697)		+= leds-lm3697.o

obj-$(CONFIG_LEDS_LM36274)		+= leds-lm36274.o

obj-$(CONFIG_LEDS_TPS6105X)		+= leds-tps6105x.o



# LED SPI Drivers

obj-$(CONFIG_LEDS_CR0014114)		+= leds-cr0014114.o

drivers/leds/leds-tps6105x.c

0 → 100644
+89 −0
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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 <TheSven73@gmail.com>");

MODULE_LICENSE("GPL v2");