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>

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 4b68520..d82f1de 100644 (file)
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -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"
 

diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 2da39e8..d7e1107 100644 (file)
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -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

diff --git a/drivers/leds/leds-tps6105x.c b/drivers/leds/leds-tps6105x.c
new file mode 100644 (file)
index 0000000..09fd88a
--- /dev/null
+++ b/drivers/leds/leds-tps6105x.c
@@ -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");