linux-kernel - [PATCH 2/3] phy: rockchip-snps-pcie3: fix clearing PHP_GRF_PCIESEL

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Date: Thu, 04 Apr 2024 19:11:27 +0200
From: Sebastian Reichel <sre@...nel.org>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 
 Heiko Stuebner <heiko@...ech.de>
Cc: Shawn Lin <shawn.lin@...k-chips.com>, Michal Tomek <mtdev79b@...il.com>, 
 linux-phy@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, 
 Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: [PATCH 2/3] phy: rockchip-snps-pcie3: fix clearing
 PHP_GRF_PCIESEL_CON bits

From: Sebastian Reichel <sebastian.reichel@...labora.com>

Currently the PCIe v3 PHY driver only sets the pcie1ln_sel bits, but
does not clear them because of an incorrect write mask. This fixes up
the issue by using a newly introduced constant for the write mask.

While at it also introduces a proper GENMASK based constant for the
PCIE30_PHY_MODE.

Fixes: 2e9bffc4f713 ("phy: rockchip: Support PCIe v3")
Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
---
 drivers/phy/rockchip/phy-rockchip-snps-pcie3.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c b/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c
index d5bcc9c42b28..9857ee45b89e 100644
--- a/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c
+++ b/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c
@@ -40,6 +40,8 @@
 #define RK3588_BIFURCATION_LANE_0_1		BIT(0)
 #define RK3588_BIFURCATION_LANE_2_3		BIT(1)
 #define RK3588_LANE_AGGREGATION		BIT(2)
+#define RK3588_PCIE1LN_SEL_EN			(GENMASK(1, 0) << 16)
+#define RK3588_PCIE30_PHY_MODE_EN		(GENMASK(2, 0) << 16)
 
 struct rockchip_p3phy_ops;
 
@@ -149,14 +151,15 @@ static int rockchip_p3phy_rk3588_init(struct rockchip_p3phy_priv *priv)
 	}
 
 	reg = mode;
-	regmap_write(priv->phy_grf, RK3588_PCIE3PHY_GRF_CMN_CON0, (0x7<<16) | reg);
+	regmap_write(priv->phy_grf, RK3588_PCIE3PHY_GRF_CMN_CON0,
+		     RK3588_PCIE30_PHY_MODE_EN | reg);
 
 	/* Set pcie1ln_sel in PHP_GRF_PCIESEL_CON */
 	if (!IS_ERR(priv->pipe_grf)) {
-		reg = mode & 3;
+		reg = mode & (RK3588_BIFURCATION_LANE_0_1 | RK3588_BIFURCATION_LANE_2_3);
 		if (reg)
 			regmap_write(priv->pipe_grf, PHP_GRF_PCIESEL_CON,
-				     (reg << 16) | reg);
+				     RK3588_PCIE1LN_SEL_EN | reg);
 	}
 
 	reset_control_deassert(priv->p30phy);

-- 
2.43.0