linux-kernel - [PATCH 5/6] phy: phy-pxa-28nm-hsic: convert to readl_poll

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Message-ID: <1598320987-25518-5-git-send-email-chunfeng.yun@mediatek.com>
Date:   Tue, 25 Aug 2020 10:03:06 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Kishon Vijay Abraham I <kishon@...com>
CC:     Vinod Koul <vkoul@...nel.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Rikard Falkeborn <rikard.falkeborn@...il.com>,
        Bharat Gooty <bharat.gooty@...adcom.com>,
        Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [PATCH 5/6] phy: phy-pxa-28nm-hsic: convert to readl_poll_timeout()

Use readl_poll_timeout() to simplify code

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
 drivers/phy/marvell/phy-pxa-28nm-hsic.c | 40 ++++++++++++++++-----------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/drivers/phy/marvell/phy-pxa-28nm-hsic.c b/drivers/phy/marvell/phy-pxa-28nm-hsic.c
index ae8370a..31b43d2 100644
--- a/drivers/phy/marvell/phy-pxa-28nm-hsic.c
+++ b/drivers/phy/marvell/phy-pxa-28nm-hsic.c
@@ -12,6 +12,7 @@
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/io.h>
+#include <linux/iopoll.h>
 #include <linux/err.h>
 #include <linux/clk.h>
 #include <linux/module.h>
@@ -44,15 +45,12 @@ struct mv_hsic_phy {
 	struct clk		*clk;
 };
 
-static bool wait_for_reg(void __iomem *reg, u32 mask, unsigned long timeout)
+static int wait_for_reg(void __iomem *reg, u32 mask, u32 ms)
 {
-	timeout += jiffies;
-	while (time_is_after_eq_jiffies(timeout)) {
-		if ((readl(reg) & mask) == mask)
-			return true;
-		msleep(1);
-	}
-	return false;
+	u32 val;
+
+	return readl_poll_timeout(reg, val, ((val & mask) == mask),
+				  1000, 1000 * ms);
 }
 
 static int mv_hsic_phy_init(struct phy *phy)
@@ -60,6 +58,7 @@ static int mv_hsic_phy_init(struct phy *phy)
 	struct mv_hsic_phy *mv_phy = phy_get_drvdata(phy);
 	struct platform_device *pdev = mv_phy->pdev;
 	void __iomem *base = mv_phy->base;
+	int ret;
 
 	clk_prepare_enable(mv_phy->clk);
 
@@ -75,14 +74,14 @@ static int mv_hsic_phy_init(struct phy *phy)
 		base + PHY_28NM_HSIC_PLL_CTRL2);
 
 	/* Make sure PHY PLL is locked */
-	if (!wait_for_reg(base + PHY_28NM_HSIC_PLL_CTRL2,
-	    PHY_28NM_HSIC_H2S_PLL_LOCK, HZ / 10)) {
+	ret = wait_for_reg(base + PHY_28NM_HSIC_PLL_CTRL2,
+			   PHY_28NM_HSIC_H2S_PLL_LOCK, 100);
+	if (ret) {
 		dev_err(&pdev->dev, "HSIC PHY PLL not locked after 100mS.");
 		clk_disable_unprepare(mv_phy->clk);
-		return -ETIMEDOUT;
 	}
 
-	return 0;
+	return ret;
 }
 
 static int mv_hsic_phy_power_on(struct phy *phy)
@@ -91,6 +90,7 @@ static int mv_hsic_phy_power_on(struct phy *phy)
 	struct platform_device *pdev = mv_phy->pdev;
 	void __iomem *base = mv_phy->base;
 	u32 reg;
+	int ret;
 
 	reg = readl(base + PHY_28NM_HSIC_CTRL);
 	/* Avoid SE0 state when resume for some device will take it as reset */
@@ -108,20 +108,20 @@ static int mv_hsic_phy_power_on(struct phy *phy)
 	 */
 
 	/* Make sure PHY Calibration is ready */
-	if (!wait_for_reg(base + PHY_28NM_HSIC_IMPCAL_CAL,
-	    PHY_28NM_HSIC_H2S_IMPCAL_DONE, HZ / 10)) {
+	ret = wait_for_reg(base + PHY_28NM_HSIC_IMPCAL_CAL,
+			   PHY_28NM_HSIC_H2S_IMPCAL_DONE, 100);
+	if (ret) {
 		dev_warn(&pdev->dev, "HSIC PHY READY not set after 100mS.");
-		return -ETIMEDOUT;
+		return ret;
 	}
 
 	/* Waiting for HSIC connect int*/
-	if (!wait_for_reg(base + PHY_28NM_HSIC_INT,
-	    PHY_28NM_HSIC_CONNECT_INT, HZ / 5)) {
+	ret = wait_for_reg(base + PHY_28NM_HSIC_INT,
+			   PHY_28NM_HSIC_CONNECT_INT, 200);
+	if (ret)
 		dev_warn(&pdev->dev, "HSIC wait for connect interrupt timeout.");
-		return -ETIMEDOUT;
-	}
 
-	return 0;
+	return ret;
 }
 
 static int mv_hsic_phy_power_off(struct phy *phy)
-- 
1.9.1