diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/818-v6.5-08-leds-trigger-netdev-add-support-for-LED-hw-control.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/818-v6.5-08-leds-trigger-netdev-add-support-for-LED-hw-control.patch | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/818-v6.5-08-leds-trigger-netdev-add-support-for-LED-hw-control.patch b/target/linux/generic/backport-5.15/818-v6.5-08-leds-trigger-netdev-add-support-for-LED-hw-control.patch new file mode 100644 index 0000000000..52faa4809b --- /dev/null +++ b/target/linux/generic/backport-5.15/818-v6.5-08-leds-trigger-netdev-add-support-for-LED-hw-control.patch @@ -0,0 +1,107 @@ +From 7c145a34ba6e380616af93262fcab9fc7261d851 Mon Sep 17 00:00:00 2001 +From: Christian Marangi <ansuelsmth@gmail.com> +Date: Mon, 29 May 2023 18:32:38 +0200 +Subject: [PATCH 08/13] leds: trigger: netdev: add support for LED hw control + +Add support for LED hw control for the netdev trigger. + +The trigger on calling set_baseline_state to configure a new mode, will +do various check to verify if hw control can be used for the requested +mode in can_hw_control() function. + +It will first check if the LED driver supports hw control for the netdev +trigger, then will use hw_control_is_supported() and finally will call +hw_control_set() to apply the requested mode. + +To use such mode, interval MUST be set to the default value and net_dev +MUST be set. If one of these 2 value are not valid, hw control will +never be used and normal software fallback is used. + +The default interval value is moved to a define to make sure they are +always synced. + +Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> +Reviewed-by: Andrew Lunn <andrew@lunn.ch> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/leds/trigger/ledtrig-netdev.c | 43 +++++++++++++++++++++++++-- + 1 file changed, 41 insertions(+), 2 deletions(-) + +--- a/drivers/leds/trigger/ledtrig-netdev.c ++++ b/drivers/leds/trigger/ledtrig-netdev.c +@@ -24,6 +24,8 @@ + #include <linux/timer.h> + #include "../leds.h" + ++#define NETDEV_LED_DEFAULT_INTERVAL 50 ++ + /* + * Configurable sysfs attributes: + * +@@ -68,6 +70,13 @@ static void set_baseline_state(struct le + int current_brightness; + struct led_classdev *led_cdev = trigger_data->led_cdev; + ++ /* Already validated, hw control is possible with the requested mode */ ++ if (trigger_data->hw_control) { ++ led_cdev->hw_control_set(led_cdev, trigger_data->mode); ++ ++ return; ++ } ++ + current_brightness = led_cdev->brightness; + if (current_brightness) + led_cdev->blink_brightness = current_brightness; +@@ -103,12 +112,42 @@ static bool supports_hw_control(struct l + + static bool can_hw_control(struct led_netdev_data *trigger_data) + { ++ unsigned long default_interval = msecs_to_jiffies(NETDEV_LED_DEFAULT_INTERVAL); ++ unsigned int interval = atomic_read(&trigger_data->interval); + struct led_classdev *led_cdev = trigger_data->led_cdev; ++ int ret; + + if (!supports_hw_control(led_cdev)) + return false; + +- return false; ++ /* ++ * Interval must be set to the default ++ * value. Any different value is rejected if in hw ++ * control. ++ */ ++ if (interval != default_interval) ++ return false; ++ ++ /* ++ * net_dev must be set with hw control, otherwise no ++ * blinking can be happening and there is nothing to ++ * offloaded. ++ */ ++ if (!trigger_data->net_dev) ++ return false; ++ ++ /* Check if the requested mode is supported */ ++ ret = led_cdev->hw_control_is_supported(led_cdev, trigger_data->mode); ++ /* Fall back to software blinking if not supported */ ++ if (ret == -EOPNOTSUPP) ++ return false; ++ if (ret) { ++ dev_warn(led_cdev->dev, ++ "Current mode check failed with error %d\n", ret); ++ return false; ++ } ++ ++ return true; + } + + static ssize_t device_name_show(struct device *dev, +@@ -413,7 +452,7 @@ static int netdev_trig_activate(struct l + trigger_data->device_name[0] = 0; + + trigger_data->mode = 0; +- atomic_set(&trigger_data->interval, msecs_to_jiffies(50)); ++ atomic_set(&trigger_data->interval, msecs_to_jiffies(NETDEV_LED_DEFAULT_INTERVAL)); + trigger_data->last_activity = 0; + + led_set_trigger_data(led_cdev, trigger_data); |