[openwrt/openwrt] realtek: dsa: support active-high LEDs

[LEDE Commits]

svanheule pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/bec9e79a99adee64dcc9559e6f008a2ffd5b3f4e

commit bec9e79a99adee64dcc9559e6f008a2ffd5b3f4e
Author: Lorenz Brun <lorenz at brun.one>
AuthorDate: Wed Dec 28 20:54:21 2022 +0100

    realtek: dsa: support active-high LEDs
    
    The TP-LINK TL-ST1008F has active-high LEDs, so we need a device tree
    property to express this.
    
    Signed-off-by: Lorenz Brun <lorenz at brun.one>
    [Tidy up code, restrict changes to 5.15]
    Signed-off-by: Sander Vanheule <sander at svanheule.net>
---
 target/linux/realtek/dts-5.15/rtl9302_zyxel_xgs1250-12.dts        | 2 ++
 target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/rtl930x.c | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/target/linux/realtek/dts-5.15/rtl9302_zyxel_xgs1250-12.dts b/target/linux/realtek/dts-5.15/rtl9302_zyxel_xgs1250-12.dts
index a57fc00c6e..a9821b2cc6 100644
--- a/target/linux/realtek/dts-5.15/rtl9302_zyxel_xgs1250-12.dts
+++ b/target/linux/realtek/dts-5.15/rtl9302_zyxel_xgs1250-12.dts
@@ -64,6 +64,8 @@
 
 	led_set: led_set at 0 {
 		compatible = "realtek,rtl9300-leds";
+		active-low;
+
 		led_set0 = <0x0000 0xffff 0x0a20 0x0b80>; // LED set 0: 1000Mbps,  10/100Mbps
 		led_set1 = <0x0a0b 0x0a28 0x0a82 0x0a0b>; // LED set 1: (10G, 5G, 2.5G) (2.5G, 1G)
 							  // (5G, 10/100) (10G, 5G, 2.5G)
diff --git a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/rtl930x.c b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/rtl930x.c
index 7e4f13fbad..5a899f32ba 100644
--- a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/rtl930x.c
+++ b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/rtl930x.c
@@ -21,6 +21,8 @@
 #define RTL930X_VLAN_PORT_TAG_STS_CTRL_IGR_P_OTAG_KEEP_MASK	GENMASK(1,1)
 #define RTL930X_VLAN_PORT_TAG_STS_CTRL_IGR_P_ITAG_KEEP_MASK	GENMASK(0,0)
 
+#define RTL930X_LED_GLB_ACTIVE_LOW				BIT(22)
+
 extern struct mutex smi_lock;
 extern struct rtl83xx_soc_info soc_info;
 
@@ -2431,6 +2433,12 @@ static void rtl930x_led_init(struct rtl838x_switch_priv *priv)
 	/* Set LED mode to serial (0x1) */
 	sw_w32_mask(0x3, 0x1, RTL930X_LED_GLB_CTRL);
 
+	/* Set LED active state */
+	if (of_property_read_bool(node, "active-low"))
+		sw_w32_mask(RTL930X_LED_GLB_ACTIVE_LOW, 0, RTL930X_LED_GLB_CTRL);
+	else
+		sw_w32_mask(0, RTL930X_LED_GLB_ACTIVE_LOW, RTL930X_LED_GLB_CTRL);
+
 	/* Set port type masks */
 	sw_w32(pm, RTL930X_LED_PORT_COPR_MASK_CTRL);
 	sw_w32(pm, RTL930X_LED_PORT_FIB_MASK_CTRL);