linux-kernel - [PATCH v2 1/9] soundwire: intel: reuse code for wait loops to set/clear bits

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Date:   Thu, 16 Jul 2020 23:09:39 +0800
From:   Bard Liao <yung-chuan.liao@...ux.intel.com>
To:     alsa-devel@...a-project.org, vkoul@...nel.org
Cc:     vinod.koul@...aro.org, linux-kernel@...r.kernel.org, tiwai@...e.de,
        broonie@...nel.org, gregkh@...uxfoundation.org, jank@...ence.com,
        srinivas.kandagatla@...aro.org, rander.wang@...ux.intel.com,
        ranjani.sridharan@...ux.intel.com, hui.wang@...onical.com,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        slawomir.blauciak@...el.com, mengdong.lin@...el.com,
        bard.liao@...el.com
Subject: [PATCH v2 1/9] soundwire: intel: reuse code for wait loops to set/clear bits

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

Refactor code and use same routines on set/clear

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
 drivers/soundwire/intel.c | 45 +++++++++++++++++----------------------
 1 file changed, 19 insertions(+), 26 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 7a65414e5714..8c7ae07c0fe1 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -123,40 +123,33 @@ static inline void intel_writew(void __iomem *base, int offset, u16 value)
 	writew(value, base + offset);
 }
 
+static int intel_wait_bit(void __iomem *base, int offset, u32 mask, u32 target)
+{
+	int timeout = 10;
+	u32 reg_read;
+
+	do {
+		reg_read = readl(base + offset);
+		if ((reg_read & mask) == target)
+			return 0;
+
+		timeout--;
+		usleep_range(50, 100);
+	} while (timeout != 0);
+
+	return -EAGAIN;
+}
+
 static int intel_clear_bit(void __iomem *base, int offset, u32 value, u32 mask)
 {
-	int timeout = 10;
-	u32 reg_read;
-
 	writel(value, base + offset);
-	do {
-		reg_read = readl(base + offset);
-		if (!(reg_read & mask))
-			return 0;
-
-		timeout--;
-		udelay(50);
-	} while (timeout != 0);
-
-	return -EAGAIN;
+	return intel_wait_bit(base, offset, mask, 0);
 }
 
 static int intel_set_bit(void __iomem *base, int offset, u32 value, u32 mask)
 {
-	int timeout = 10;
-	u32 reg_read;
-
 	writel(value, base + offset);
-	do {
-		reg_read = readl(base + offset);
-		if (reg_read & mask)
-			return 0;
-
-		timeout--;
-		udelay(50);
-	} while (timeout != 0);
-
-	return -EAGAIN;
+	return intel_wait_bit(base, offset, mask, mask);
 }
 
 /*
-- 
2.17.1