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-rw-r--r--drivers/leds/Kconfig6
-rw-r--r--drivers/leds/Makefile1
-rw-r--r--drivers/leds/leds-max77650.c147
-rw-r--r--drivers/leds/leds-pca9532.c8
-rw-r--r--drivers/leds/trigger/ledtrig-netdev.c16
5 files changed, 167 insertions, 11 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index da00b9ed5a5c..45914c66c852 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -618,6 +618,12 @@ config LEDS_TLC591XX
This option enables support for Texas Instruments TLC59108
and TLC59116 LED controllers.
+config LEDS_MAX77650
+ tristate "LED support for Maxim MAX77650 PMIC"
+ depends on LEDS_CLASS && MFD_MAX77650
+ help
+ LEDs driver for MAX77650 family of PMICs from Maxim Integrated.
+
config LEDS_MAX77693
tristate "LED support for MAX77693 Flash"
depends on LEDS_CLASS_FLASH
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 7a8b1f55d459..1e9702ebffee 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -62,6 +62,7 @@ obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o
obj-$(CONFIG_LEDS_NS2) += leds-ns2.o
obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o
obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o
+obj-$(CONFIG_LEDS_MAX77650) += leds-max77650.o
obj-$(CONFIG_LEDS_MAX77693) += leds-max77693.o
obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o
obj-$(CONFIG_LEDS_LM355x) += leds-lm355x.o
diff --git a/drivers/leds/leds-max77650.c b/drivers/leds/leds-max77650.c
new file mode 100644
index 000000000000..6b74ce9cac12
--- /dev/null
+++ b/drivers/leds/leds-max77650.c
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 BayLibre SAS
+// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+//
+// LED driver for MAXIM 77650/77651 charger/power-supply.
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/mfd/max77650.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MAX77650_LED_NUM_LEDS 3
+
+#define MAX77650_LED_A_BASE 0x40
+#define MAX77650_LED_B_BASE 0x43
+
+#define MAX77650_LED_BR_MASK GENMASK(4, 0)
+#define MAX77650_LED_EN_MASK GENMASK(7, 6)
+
+#define MAX77650_LED_MAX_BRIGHTNESS MAX77650_LED_BR_MASK
+
+/* Enable EN_LED_MSTR. */
+#define MAX77650_LED_TOP_DEFAULT BIT(0)
+
+#define MAX77650_LED_ENABLE GENMASK(7, 6)
+#define MAX77650_LED_DISABLE 0x00
+
+#define MAX77650_LED_A_DEFAULT MAX77650_LED_DISABLE
+/* 100% on duty */
+#define MAX77650_LED_B_DEFAULT GENMASK(3, 0)
+
+struct max77650_led {
+ struct led_classdev cdev;
+ struct regmap *map;
+ unsigned int regA;
+ unsigned int regB;
+};
+
+static struct max77650_led *max77650_to_led(struct led_classdev *cdev)
+{
+ return container_of(cdev, struct max77650_led, cdev);
+}
+
+static int max77650_led_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct max77650_led *led = max77650_to_led(cdev);
+ int val, mask;
+
+ mask = MAX77650_LED_BR_MASK | MAX77650_LED_EN_MASK;
+
+ if (brightness == LED_OFF)
+ val = MAX77650_LED_DISABLE;
+ else
+ val = MAX77650_LED_ENABLE | brightness;
+
+ return regmap_update_bits(led->map, led->regA, mask, val);
+}
+
+static int max77650_led_probe(struct platform_device *pdev)
+{
+ struct device_node *of_node, *child;
+ struct max77650_led *leds, *led;
+ struct device *parent;
+ struct device *dev;
+ struct regmap *map;
+ const char *label;
+ int rv, num_leds;
+ u32 reg;
+
+ dev = &pdev->dev;
+ parent = dev->parent;
+ of_node = dev->of_node;
+
+ if (!of_node)
+ return -ENODEV;
+
+ leds = devm_kcalloc(dev, sizeof(*leds),
+ MAX77650_LED_NUM_LEDS, GFP_KERNEL);
+ if (!leds)
+ return -ENOMEM;
+
+ map = dev_get_regmap(dev->parent, NULL);
+ if (!map)
+ return -ENODEV;
+
+ num_leds = of_get_child_count(of_node);
+ if (!num_leds || num_leds > MAX77650_LED_NUM_LEDS)
+ return -ENODEV;
+
+ for_each_child_of_node(of_node, child) {
+ rv = of_property_read_u32(child, "reg", &reg);
+ if (rv || reg >= MAX77650_LED_NUM_LEDS)
+ return -EINVAL;
+
+ led = &leds[reg];
+ led->map = map;
+ led->regA = MAX77650_LED_A_BASE + reg;
+ led->regB = MAX77650_LED_B_BASE + reg;
+ led->cdev.brightness_set_blocking = max77650_led_brightness_set;
+ led->cdev.max_brightness = MAX77650_LED_MAX_BRIGHTNESS;
+
+ label = of_get_property(child, "label", NULL);
+ if (!label) {
+ led->cdev.name = "max77650::";
+ } else {
+ led->cdev.name = devm_kasprintf(dev, GFP_KERNEL,
+ "max77650:%s", label);
+ if (!led->cdev.name)
+ return -ENOMEM;
+ }
+
+ of_property_read_string(child, "linux,default-trigger",
+ &led->cdev.default_trigger);
+
+ rv = devm_of_led_classdev_register(dev, child, &led->cdev);
+ if (rv)
+ return rv;
+
+ rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT);
+ if (rv)
+ return rv;
+
+ rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT);
+ if (rv)
+ return rv;
+ }
+
+ return regmap_write(map,
+ MAX77650_REG_CNFG_LED_TOP,
+ MAX77650_LED_TOP_DEFAULT);
+}
+
+static struct platform_driver max77650_led_driver = {
+ .driver = {
+ .name = "max77650-led",
+ },
+ .probe = max77650_led_probe,
+};
+module_platform_driver(max77650_led_driver);
+
+MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver");
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index 7fea18b0c15d..7cb4d685a1f1 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -513,6 +513,7 @@ static int pca9532_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int devid;
+ const struct of_device_id *of_id;
struct pca9532_data *data = i2c_get_clientdata(client);
struct pca9532_platform_data *pca9532_pdata =
dev_get_platdata(&client->dev);
@@ -528,8 +529,11 @@ static int pca9532_probe(struct i2c_client *client,
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
- devid = (int)(uintptr_t)of_match_device(
- of_pca9532_leds_match, &client->dev)->data;
+ of_id = of_match_device(of_pca9532_leds_match,
+ &client->dev);
+ if (unlikely(!of_id))
+ return -EINVAL;
+ devid = (int)(uintptr_t) of_id->data;
} else {
devid = id->driver_data;
}
diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
index 3dd3ed46d473..136f86a1627d 100644
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -122,7 +122,8 @@ static ssize_t device_name_store(struct device *dev,
trigger_data->net_dev = NULL;
}
- strncpy(trigger_data->device_name, buf, size);
+ memcpy(trigger_data->device_name, buf, size);
+ trigger_data->device_name[size] = 0;
if (size > 0 && trigger_data->device_name[size - 1] == '\n')
trigger_data->device_name[size - 1] = 0;
@@ -301,11 +302,11 @@ static int netdev_trig_notify(struct notifier_block *nb,
container_of(nb, struct led_netdev_data, notifier);
if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE
- && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER
- && evt != NETDEV_CHANGENAME)
+ && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER)
return NOTIFY_DONE;
- if (strcmp(dev->name, trigger_data->device_name))
+ if (!(dev == trigger_data->net_dev ||
+ (evt == NETDEV_REGISTER && !strcmp(dev->name, trigger_data->device_name))))
return NOTIFY_DONE;
cancel_delayed_work_sync(&trigger_data->work);
@@ -320,12 +321,9 @@ static int netdev_trig_notify(struct notifier_block *nb,
dev_hold(dev);
trigger_data->net_dev = dev;
break;
- case NETDEV_CHANGENAME:
case NETDEV_UNREGISTER:
- if (trigger_data->net_dev) {
- dev_put(trigger_data->net_dev);
- trigger_data->net_dev = NULL;
- }
+ dev_put(trigger_data->net_dev);
+ trigger_data->net_dev = NULL;
break;
case NETDEV_UP:
case NETDEV_CHANGE:
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-02 16:26:34 +0200