[PATCH 1/2] net: phy: motorcomm: add led_brightness_set for YT8521

[PATCH 1/2] net: phy: motorcomm: add led_brightness_set for YT8521

[Chukun Pan]

Add support for manual brightness setting on YT8521/YT8531 PHY.

Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
---
 drivers/net/phy/motorcomm.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/net/phy/motorcomm.c b/drivers/net/phy/motorcomm.c
index 463e1ea3efc9..bcd3afef0d49 100644
--- a/drivers/net/phy/motorcomm.c
+++ b/drivers/net/phy/motorcomm.c
@@ -258,6 +258,10 @@
 #define YTPHY_WCR_INTR_SEL			BIT(6)
 #define YTPHY_WCR_ENABLE			BIT(3)
 
+#define YTPHY_LED_GENERAL_CFG_REG		0xA00B
+#define YTPHY_LED_FORCE_MODE(x)			BIT((x) * 3)
+#define YTPHY_LED_FORCE_EN(x)			BIT((x) * 3 + 2)
+
 /* 2b00 84ms
  * 2b01 168ms  *default*
  * 2b10 336ms
@@ -1775,6 +1779,31 @@ static int yt8531s_config_init(struct phy_device *phydev)
 	return phy_restore_page(phydev, old_page, ret);
 }
 
+static int yt8521_led_brightness_set(struct phy_device *phydev, u8 index,
+				     enum led_brightness value)
+{
+	u16 regs;
+	int ret;
+
+	if (index >= YT8521_MAX_LEDS)
+		return -EINVAL;
+
+	/* clear HW LED setup */
+	ret = ytphy_write_ext(phydev, YT8521_LED0_CFG_REG + index, 0);
+	if (ret < 0)
+		return ret;
+
+	regs = ytphy_read_ext(phydev, YTPHY_LED_GENERAL_CFG_REG);
+	if (value != LED_OFF)
+		regs |= YTPHY_LED_FORCE_EN(index) |
+			YTPHY_LED_FORCE_MODE(index);
+	else
+		regs &= ~(YTPHY_LED_FORCE_EN(index) |
+			  YTPHY_LED_FORCE_MODE(index));
+
+	return ytphy_write_ext(phydev, YTPHY_LED_GENERAL_CFG_REG, regs);
+}
+
 static const unsigned long supported_trgs = (BIT(TRIGGER_NETDEV_FULL_DUPLEX) |
 					     BIT(TRIGGER_NETDEV_HALF_DUPLEX) |
 					     BIT(TRIGGER_NETDEV_LINK)        |
@@ -3266,6 +3295,7 @@ static struct phy_driver motorcomm_phy_drvs[] = {
 		.soft_reset	= yt8521_soft_reset,
 		.suspend	= yt8521_suspend,
 		.resume		= yt8521_resume,
+		.led_brightness_set = yt8521_led_brightness_set,
 		.led_hw_is_supported = yt8521_led_hw_is_supported,
 		.led_hw_control_set = yt8521_led_hw_control_set,
 		.led_hw_control_get = yt8521_led_hw_control_get,
@@ -3288,6 +3318,7 @@ static struct phy_driver motorcomm_phy_drvs[] = {
 		.get_wol	= ytphy_get_wol,
 		.set_wol	= yt8531_set_wol,
 		.link_change_notify = yt8531_link_change_notify,
+		.led_brightness_set = yt8521_led_brightness_set,
 		.led_hw_is_supported = yt8521_led_hw_is_supported,
 		.led_hw_control_set = yt8521_led_hw_control_set,
 		.led_hw_control_get = yt8521_led_hw_control_get,
-- 
2.34.1

[PATCH 2/2] net: phy: motorcomm: add missing trigger link for YT8521

[Chukun Pan]

TRIGGER_NETDEV_LINK is available in led_hw_control_set,
but missing in led_hw_control_get. Add it.

Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
---
 drivers/net/phy/motorcomm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/phy/motorcomm.c b/drivers/net/phy/motorcomm.c
index bcd3afef0d49..5b1d17bd231a 100644
--- a/drivers/net/phy/motorcomm.c
+++ b/drivers/net/phy/motorcomm.c
@@ -1901,6 +1901,11 @@ static int yt8521_led_hw_control_get(struct phy_device *phydev, u8 index,
 	if (val & YT8521_LED_10_ON_EN)
 		__set_bit(TRIGGER_NETDEV_LINK_10, rules);
 
+	if ((val & YT8521_LED_10_ON_EN) &&
+	    (val & YT8521_LED_100_ON_EN) &&
+	    (val & YT8521_LED_1000_ON_EN))
+		__set_bit(TRIGGER_NETDEV_LINK, rules);
+
 	return 0;
 }
 
-- 
2.34.1

Re: [PATCH 1/2] net: phy: motorcomm: add led_brightness_set for YT8521

[Andrew Lunn]

On Tue, Nov 10, 2026 at 06:00:00PM +0800, Chukun Pan wrote:
> Add support for manual brightness setting on YT8521/YT8531 PHY.

Has this been tested on real hardware? Have you had it blinking the
heartbeat? Shift-lock etc.

> --- a/drivers/net/phy/motorcomm.c
> +++ b/drivers/net/phy/motorcomm.c
> @@ -258,6 +258,10 @@
>  #define YTPHY_WCR_INTR_SEL			BIT(6)
>  #define YTPHY_WCR_ENABLE			BIT(3)
>  
> +#define YTPHY_LED_GENERAL_CFG_REG		0xA00B
> +#define YTPHY_LED_FORCE_MODE(x)			BIT((x) * 3)
> +#define YTPHY_LED_FORCE_EN(x)			BIT((x) * 3 + 2)
> +
>  /* 2b00 84ms
>   * 2b01 168ms  *default*
>   * 2b10 336ms

I _think_ this is the wrong place to insert these. 2b00 84ms refers to
YTPHY_WCR_PULSE_WIDTH_MASK which is used with YTPHY_WOL_CONFIG_REG? So
you insert these in the middle of WOL bits.

The sorting of registers is a bit messed up in this driver, but i
think you need to insert before:

#define YTPHY_PAD_DRIVE_STRENGTH_REG		0xA010

    Andrew

---
pw-bot: cr

Re: [PATCH 2/2] net: phy: motorcomm: add missing trigger link for YT8521

[Andrew Lunn]

On Tue, Nov 10, 2026 at 06:00:01PM +0800, Chukun Pan wrote:
> TRIGGER_NETDEV_LINK is available in led_hw_control_set,
> but missing in led_hw_control_get. Add it.
> 
> Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

Re: [PATCH 1/2] net: phy: motorcomm: add led_brightness_set for YT8521

[Chukun Pan]

Hi,

> Has this been tested on real hardware?

I tested yt8531 on some SBCs and will add this to the commit message.

> Have you had it blinking the heartbeat? Shift-lock etc.

Only supports forced LED on/off. Forced blink is disabled by default.
Do I need to implement heartbeat?

> I _think_ this is the wrong place to insert these.
>
> The sorting of registers is a bit messed up in this driver, but i
> think you need to insert before:
>
> #define YTPHY_PAD_DRIVE_STRENGTH_REG		0xA010

Indeed, I will correct this.

Thanks,
Chukun

Re: [PATCH 1/2] net: phy: motorcomm: add led_brightness_set for YT8521

[Andrew Lunn]

> Only supports forced LED on/off. Forced blink is disabled by default.
> Do I need to implement heartbeat?

drivers/leds/trigger/ledtrig-heartbeat.c

You can enable it just like any other trigger.

I find it useful to know when my bugs have caused a deadlock, etc.

    Andrew