linux-kernel - [PATCH 2/2] drivers: phy: qcom: ipq806x-usb: conver latch function to pool macro

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Date:   Mon, 17 Jan 2022 01:26:41 +0100
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Ansuel Smith <ansuelsmth@...il.com>
Subject: [PATCH 2/2] drivers: phy: qcom: ipq806x-usb: conver latch function to pool macro

Convert latch function to readl pool macro to tidy things up.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
---
 drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c b/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
index 6788e0e8272a..ab2d1431546d 100644
--- a/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
+++ b/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
@@ -112,6 +112,9 @@
 #define SS_CR_READ_REG				BIT(0)
 #define SS_CR_WRITE_REG				BIT(0)
 
+#define LATCH_SLEEP				40
+#define LATCH_TIMEOUT				100
+
 struct usb_phy {
 	void __iomem		*base;
 	struct device		*dev;
@@ -156,19 +159,9 @@ static inline void usb_phy_write_readback(struct usb_phy *phy_dwc3,
 
 static int wait_for_latch(void __iomem *addr)
 {
-	u32 retry = 10;
-
-	while (true) {
-		if (!readl(addr))
-			break;
-
-		if (--retry == 0)
-			return -ETIMEDOUT;
-
-		usleep_range(10, 20);
-	}
+	u32 val;
 
-	return 0;
+	return readl_poll_timeout(addr, val, !val, LATCH_SLEEP, LATCH_TIMEOUT);
 }
 
 /**
-- 
2.33.1