From: Christian Marangi <ansuelsmth@gmail.com>
To: Pavel Machek <pavel@ucw.cz>, Lee Jones <lee@kernel.org>,
Jonathan Corbet <corbet@lwn.net>, Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Christian Marangi <ansuelsmth@gmail.com>,
linux-leds@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: [net-next PATCH v2 08/13] leds: trigger: netdev: add support for LED hw control
Date: Thu, 25 May 2023 16:53:56 +0200 [thread overview]
Message-ID: <20230525145401.27007-9-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20230525145401.27007-1-ansuelsmth@gmail.com>
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.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/leds/trigger/ledtrig-netdev.c | 39 ++++++++++++++++++++++++++-
1 file changed, 38 insertions(+), 1 deletion(-)
diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
index cb2ec33abc4e..8d6381415208 100644
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -68,6 +68,13 @@ static void set_baseline_state(struct led_netdev_data *trigger_data)
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 +110,42 @@ static bool supports_hw_control(struct led_classdev *led_cdev)
static bool can_hw_control(struct led_netdev_data *trigger_data)
{
+ unsigned int interval = atomic_read(&trigger_data->interval);
struct led_classdev *led_cdev = trigger_data->led_cdev;
+ unsigned long default_interval = msecs_to_jiffies(50);
+ 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,
--
2.39.2
next prev parent reply other threads:[~2023-05-25 14:55 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-25 14:53 [net-next PATCH v2 00/13] leds: introduce new LED hw control APIs Christian Marangi
2023-05-25 14:53 ` [net-next PATCH v2 01/13] leds: add APIs for LEDs hw control Christian Marangi
2023-05-25 14:53 ` [net-next PATCH v2 02/13] leds: add API to get attached device for LED " Christian Marangi
2023-05-25 14:53 ` [net-next PATCH v2 03/13] Documentation: leds: leds-class: Document new Hardware driven LEDs APIs Christian Marangi
2023-05-25 14:53 ` [net-next PATCH v2 04/13] leds: trigger: netdev: refactor code setting device name Christian Marangi
2023-05-25 14:53 ` [net-next PATCH v2 05/13] leds: trigger: netdev: introduce check for possible hw control Christian Marangi
2023-05-25 14:53 ` [net-next PATCH v2 06/13] leds: trigger: netdev: add basic check for hw control support Christian Marangi
2023-05-25 14:53 ` [net-next PATCH v2 07/13] leds: trigger: netdev: reject interval store for hw_control Christian Marangi
2023-05-25 14:53 ` Christian Marangi [this message]
2023-05-25 14:53 ` [net-next PATCH v2 09/13] leds: trigger: netdev: validate configured netdev Christian Marangi
2023-05-25 14:53 ` [net-next PATCH v2 10/13] leds: trigger: netdev: init mode if hw control already active Christian Marangi
2023-05-25 14:53 ` [net-next PATCH v2 11/13] leds: trigger: netdev: expose netdev trigger modes in linux include Christian Marangi
2023-05-25 14:54 ` [net-next PATCH v2 12/13] net: dsa: qca8k: implement hw_control ops Christian Marangi
2023-05-25 14:54 ` [net-next PATCH v2 13/13] net: dsa: qca8k: add op to get ports netdev Christian Marangi
2023-05-26 3:43 ` [net-next PATCH v2 00/13] leds: introduce new LED hw control APIs Jakub Kicinski
2023-05-27 11:31 ` Christian Marangi
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