linux-kernel - [PATCH v3 3/6] phy: rockchip-pcie: Use regmap_read_poll_timeout() for PCIe reference clk PLL status

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Message-ID: <20241012071919.3726-4-linux.amoon@gmail.com>
Date: Sat, 12 Oct 2024 12:49:05 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	linux-phy@...ts.infradead.org (open list:GENERIC PHY FRAMEWORK),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Rockchip SoC support),
	linux-rockchip@...ts.infradead.org (open list:ARM/Rockchip SoC support),
	linux-kernel@...r.kernel.org (open list)
Cc: Anand Moon <linux.amoon@...il.com>,
	Dan Carpenter <dan.carpenter@...aro.org>
Subject: [PATCH v3 3/6] phy: rockchip-pcie: Use regmap_read_poll_timeout() for PCIe reference clk PLL status

Replace open-coded phy PCIe reference clk PLL status polling with
regmap_read_poll_timeout API. This change simplifies the code without
altering functionality.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
v3: None.
v2: Fix the subject, add the missing () in the function name,
    Fix the typo reference
v1: None.
---
 drivers/phy/rockchip/phy-rockchip-pcie.c | 56 +++++++-----------------
 1 file changed, 15 insertions(+), 41 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-pcie.c b/drivers/phy/rockchip/phy-rockchip-pcie.c
index b5b1b1a667b2..e60f24b0b363 100644
--- a/drivers/phy/rockchip/phy-rockchip-pcie.c
+++ b/drivers/phy/rockchip/phy-rockchip-pcie.c
@@ -162,7 +162,6 @@ static int rockchip_pcie_phy_power_on(struct phy *phy)
 	struct rockchip_pcie_phy *rk_phy = to_pcie_phy(inst);
 	int err = 0;
 	u32 status;
-	unsigned long timeout;
 
 	mutex_lock(&rk_phy->pcie_mutex);
 
@@ -191,21 +190,11 @@ static int rockchip_pcie_phy_power_on(struct phy *phy)
 	 * so we make it large enough here. And we use loop-break
 	 * method which should not be harmful.
 	 */
-	timeout = jiffies + msecs_to_jiffies(1000);
-
-	err = -EINVAL;
-	while (time_before(jiffies, timeout)) {
-		regmap_read(rk_phy->reg_base,
-			    rk_phy->phy_data->pcie_status,
-			    &status);
-		if (status & PHY_PLL_LOCKED) {
-			dev_dbg(&phy->dev, "pll locked!\n");
-			err = 0;
-			break;
-		}
-		msleep(20);
-	}
-
+	err = regmap_read_poll_timeout(rk_phy->reg_base,
+				       rk_phy->phy_data->pcie_status,
+				       status,
+				       status & PHY_PLL_LOCKED,
+				       200, 100000);
 	if (err) {
 		dev_err(&phy->dev, "pll lock timeout!\n");
 		goto err_pll_lock;
@@ -214,19 +203,11 @@ static int rockchip_pcie_phy_power_on(struct phy *phy)
 	phy_wr_cfg(rk_phy, PHY_CFG_CLK_TEST, PHY_CFG_SEPE_RATE);
 	phy_wr_cfg(rk_phy, PHY_CFG_CLK_SCC, PHY_CFG_PLL_100M);
 
-	err = -ETIMEDOUT;
-	while (time_before(jiffies, timeout)) {
-		regmap_read(rk_phy->reg_base,
-			    rk_phy->phy_data->pcie_status,
-			    &status);
-		if (!(status & PHY_PLL_OUTPUT)) {
-			dev_dbg(&phy->dev, "pll output enable done!\n");
-			err = 0;
-			break;
-		}
-		msleep(20);
-	}
-
+	err = regmap_read_poll_timeout(rk_phy->reg_base,
+				       rk_phy->phy_data->pcie_status,
+				       status,
+				       !(status & PHY_PLL_OUTPUT),
+				       200, 100000);
 	if (err) {
 		dev_err(&phy->dev, "pll output enable timeout!\n");
 		goto err_pll_lock;
@@ -236,19 +217,12 @@ static int rockchip_pcie_phy_power_on(struct phy *phy)
 		     HIWORD_UPDATE(PHY_CFG_PLL_LOCK,
 				   PHY_CFG_ADDR_MASK,
 				   PHY_CFG_ADDR_SHIFT));
-	err = -EINVAL;
-	while (time_before(jiffies, timeout)) {
-		regmap_read(rk_phy->reg_base,
-			    rk_phy->phy_data->pcie_status,
-			    &status);
-		if (status & PHY_PLL_LOCKED) {
-			dev_dbg(&phy->dev, "pll relocked!\n");
-			err = 0;
-			break;
-		}
-		msleep(20);
-	}
 
+	err = regmap_read_poll_timeout(rk_phy->reg_base,
+				       rk_phy->phy_data->pcie_status,
+				       status,
+				       status & PHY_PLL_LOCKED,
+				       200, 100000);
 	if (err) {
 		dev_err(&phy->dev, "pll relock timeout!\n");
 		goto err_pll_lock;
-- 
2.44.0