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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: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
This commit is contained in:
Sven Van Asbroeck 2019-12-16 09:32:58 -05:00 committed by Pavel
parent b0ff986084
commit b3b42b4a38
3 changed files with 100 additions and 0 deletions
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10
drivers/leds/Kconfig
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@ -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"

1
drivers/leds/Makefile
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@ -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

89
drivers/leds/leds-tps6105x.c Normal file
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@ -0,0 +1,89 @@
// 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");