linux-kernel - [PATCH 5.15 293/317] net: mtk_eth_soc: move MAC_MCR setting to mac

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Date: Sun, 24 Mar 2024 19:34:33 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
	Jakub Kicinski <kuba@...nel.org>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 293/317] net: mtk_eth_soc: move MAC_MCR setting to mac_finish()

From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>

[ Upstream commit 0e37ad71b2ff772009595002da2860999e98e14e ]

Move the setting of the MTK_MAC_MCR register from the end of mac_config
into the phylink mac_finish() method, to keep it as the very last write
that is done during configuration.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Stable-dep-of: f1b85ef15a99 ("net: mediatek: mtk_eth_soc: clear MAC_MCR_FORCE_LINK only when MAC is up")
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 33 ++++++++++++++-------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 139dfdb1e58bd..c9d9a082c9f83 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -223,8 +223,8 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 	struct mtk_mac *mac = container_of(config, struct mtk_mac,
 					   phylink_config);
 	struct mtk_eth *eth = mac->hw;
-	u32 mcr_cur, mcr_new, sid, i;
 	int val, ge_mode, err = 0;
+	u32 sid, i;
 
 	/* MT76x8 has no hardware settings between for the MAC */
 	if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628) &&
@@ -359,6 +359,25 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 		return;
 	}
 
+	return;
+
+err_phy:
+	dev_err(eth->dev, "%s: GMAC%d mode %s not supported!\n", __func__,
+		mac->id, phy_modes(state->interface));
+	return;
+
+init_err:
+	dev_err(eth->dev, "%s: GMAC%d mode %s err: %d!\n", __func__,
+		mac->id, phy_modes(state->interface), err);
+}
+
+static int mtk_mac_finish(struct phylink_config *config, unsigned int mode,
+			  phy_interface_t interface)
+{
+	struct mtk_mac *mac = container_of(config, struct mtk_mac,
+					   phylink_config);
+	u32 mcr_cur, mcr_new;
+
 	/* Setup gmac */
 	mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
 	mcr_new = mcr_cur;
@@ -370,16 +389,7 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 	if (mcr_new != mcr_cur)
 		mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id));
 
-	return;
-
-err_phy:
-	dev_err(eth->dev, "%s: GMAC%d mode %s not supported!\n", __func__,
-		mac->id, phy_modes(state->interface));
-	return;
-
-init_err:
-	dev_err(eth->dev, "%s: GMAC%d mode %s err: %d!\n", __func__,
-		mac->id, phy_modes(state->interface), err);
+	return 0;
 }
 
 static void mtk_mac_pcs_get_state(struct phylink_config *config,
@@ -562,6 +572,7 @@ static const struct phylink_mac_ops mtk_phylink_ops = {
 	.mac_pcs_get_state = mtk_mac_pcs_get_state,
 	.mac_an_restart = mtk_mac_an_restart,
 	.mac_config = mtk_mac_config,
+	.mac_finish = mtk_mac_finish,
 	.mac_link_down = mtk_mac_link_down,
 	.mac_link_up = mtk_mac_link_up,
 };
-- 
2.43.0