| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20191119154611.29625-4-TheSven73@gmail.com>
Date: Tue, 19 Nov 2019 10:46:10 -0500
From: Sven Van Asbroeck <thesven73@...il.com>
To: Lee Jones <lee.jones@...aro.org>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Jacek Anaszewski <jacek.anaszewski@...il.com>,
Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>
Cc: Linus Walleij <linus.walleij@...aro.org>,
Grigoryev Denis <grigoryev@...twel.ru>,
Axel Lin <axel.lin@...ics.com>, Dan Murphy <dmurphy@...com>,
Mark Rutland <mark.rutland@....com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-leds@...r.kernel.org
Subject: [PATCH v2 3/4] leds: tps6105x: add driver for mfd chip led mode
This driver adds support for the led operational mode of the
tps6105x mfd device.
Example usage, devicetree:
i2c0 {
tps61052@33 {
compatible = "ti,tps61052";
reg = <0x33>;
led {
label = "tps-led";
};
};
};
Example usage, platform data in machine layer:
#include <linux/mfd/tps6105x.h>
struct tps6105x_platform_data pdata = {
.mode = TPS6105X_MODE_TORCH,
.led_label = "tps-led",
};
Tree: next-20191118
Signed-off-by: Sven Van Asbroeck <TheSven73@...il.com>
---
drivers/leds/Kconfig | 10 +++++
drivers/leds/Makefile | 1 +
drivers/leds/leds-tps6105x.c | 87 ++++++++++++++++++++++++++++++++++++
include/linux/mfd/tps6105x.h | 1 +
4 files changed, 99 insertions(+)
create mode 100644 drivers/leds/leds-tps6105x.c
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 4b68520ac251..7c7ceaa824a2 100644
--- 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 2da39e896ce8..d7e1107753fb 100644
--- 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
index 000000000000..87dbe4846df6
--- /dev/null
+++ b/drivers/leds/leds-tps6105x.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#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;
+};
+
+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 const char *label_from_dt(struct device *dev)
+{
+ struct device_node *led =
+ of_get_child_by_name(dev->parent->of_node, "led");
+ const char *label;
+
+ if (!led) {
+ dev_err(dev, "led node not found");
+ return NULL;
+ }
+ if (of_property_read_string(led, "label", &label))
+ label = NULL;
+ of_node_put(led);
+
+ return label;
+}
+
+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 tps6105x_priv *priv;
+ const char *label;
+ 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;
+ }
+
+ label = pdata->led_label ?: label_from_dt(&pdev->dev);
+ label = label ?: "tps6105x";
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ priv->regmap = tps6105x->regmap;
+ priv->cdev.name = label;
+ priv->cdev.brightness_set_blocking = tps6105x_brightness_set;
+ priv->cdev.max_brightness = 7;
+
+ 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(&pdev->dev, &priv->cdev);
+}
+
+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@...il.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/tps6105x.h b/include/linux/mfd/tps6105x.h
index b1313411ef09..287a67e004f8 100644
--- a/include/linux/mfd/tps6105x.h
+++ b/include/linux/mfd/tps6105x.h
@@ -78,6 +78,7 @@ enum tps6105x_mode {
struct tps6105x_platform_data {
enum tps6105x_mode mode;
struct regulator_init_data *regulator_data;
+ const char *led_label;
};
/**
--
2.17.1
Powered by blists - more mailing lists