[PATCH 5.12 457/677] net: dsa: bcm_sf2: fix BCM4908 RGMII reg(s)

[Greg Kroah-Hartman]

From: Rafał Miłecki <rafal@xxxxxxxxxx>

[ Upstream commit 6859d91549341c2ad769d482de58129f080c0f04 ]

BCM4908 has only 1 RGMII reg for controlling port 7.

Fixes: 73b7a6047971 ("net: dsa: bcm_sf2: support BCM4908's integrated switch")
Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
Acked-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/dsa/bcm_sf2.c      | 11 +++++++----
 drivers/net/dsa/bcm_sf2_regs.h |  1 +
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index cd64b7f471b5..9c86cacc4a72 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -36,7 +36,12 @@ static u16 bcm_sf2_reg_rgmii_cntrl(struct bcm_sf2_priv *priv, int port)
 {
 	switch (priv->type) {
 	case BCM4908_DEVICE_ID:
-		/* TODO */
+		switch (port) {
+		case 7:
+			return REG_RGMII_11_CNTRL;
+		default:
+			break;
+		}
 		break;
 	default:
 		switch (port) {
@@ -1179,9 +1184,7 @@ static const u16 bcm_sf2_4908_reg_offsets[] = {
 	[REG_PHY_REVISION]	= 0x14,
 	[REG_SPHY_CNTRL]	= 0x24,
 	[REG_CROSSBAR]		= 0xc8,
-	[REG_RGMII_0_CNTRL]	= 0xe0,
-	[REG_RGMII_1_CNTRL]	= 0xec,
-	[REG_RGMII_2_CNTRL]	= 0xf8,
+	[REG_RGMII_11_CNTRL]	= 0x014c,
 	[REG_LED_0_CNTRL]	= 0x40,
 	[REG_LED_1_CNTRL]	= 0x4c,
 	[REG_LED_2_CNTRL]	= 0x58,
diff --git a/drivers/net/dsa/bcm_sf2_regs.h b/drivers/net/dsa/bcm_sf2_regs.h
index c7783cb45845..9e141d1a0b07 100644
--- a/drivers/net/dsa/bcm_sf2_regs.h
+++ b/drivers/net/dsa/bcm_sf2_regs.h
@@ -21,6 +21,7 @@ enum bcm_sf2_reg_offs {
 	REG_RGMII_0_CNTRL,
 	REG_RGMII_1_CNTRL,
 	REG_RGMII_2_CNTRL,
+	REG_RGMII_11_CNTRL,
 	REG_LED_0_CNTRL,
 	REG_LED_1_CNTRL,
 	REG_LED_2_CNTRL,
-- 
2.30.2