linux-kernel - [PATCH v4 5/8] scsi: ufs-mediatek: replace all delay places by common delay function

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Message-ID: <20200313090103.15390-6-stanley.chu@mediatek.com>
Date:   Fri, 13 Mar 2020 17:01:00 +0800
From:   Stanley Chu <stanley.chu@...iatek.com>
To:     <linux-scsi@...r.kernel.org>, <martin.petersen@...cle.com>,
        <avri.altman@....com>, <alim.akhtar@...sung.com>,
        <jejb@...ux.ibm.com>
CC:     <beanhuo@...ron.com>, <asutoshd@...eaurora.org>,
        <cang@...eaurora.org>, <matthias.bgg@...il.com>,
        <bvanassche@....org>, <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <kuohong.wang@...iatek.com>,
        <peter.wang@...iatek.com>, <chun-hung.wu@...iatek.com>,
        <andy.teng@...iatek.com>, Stanley Chu <stanley.chu@...iatek.com>
Subject: [PATCH v4 5/8] scsi: ufs-mediatek: replace all delay places by common delay function

A common delay function is introduced in UFS core driver, thus
ufs-mediatek can use it to replace all delay codes.

Signed-off-by: Stanley Chu <stanley.chu@...iatek.com>
---
 drivers/scsi/ufs/ufs-mediatek.c | 21 +++++----------------
 1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
index 3b0e575d7460..0ff6781654fd 100644
--- a/drivers/scsi/ufs/ufs-mediatek.c
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -100,17 +100,6 @@ static int ufs_mtk_bind_mphy(struct ufs_hba *hba)
 	return err;
 }
 
-static void ufs_mtk_udelay(unsigned long us)
-{
-	if (!us)
-		return;
-
-	if (us < 10)
-		udelay(us);
-	else
-		usleep_range(us, us + 10);
-}
-
 static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
 {
 	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
@@ -123,7 +112,7 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
 
 	if (on) {
 		ufs_mtk_ref_clk_notify(on, res);
-		ufs_mtk_udelay(host->ref_clk_ungating_wait_us);
+		ufshcd_wait_us(host->ref_clk_ungating_wait_us, 10, true);
 		ufshcd_writel(hba, REFCLK_REQUEST, REG_UFS_REFCLK_CTRL);
 	} else {
 		ufshcd_writel(hba, REFCLK_RELEASE, REG_UFS_REFCLK_CTRL);
@@ -138,7 +127,7 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
 		if (((value & REFCLK_ACK) >> 1) == (value & REFCLK_REQUEST))
 			goto out;
 
-		usleep_range(100, 200);
+		ufshcd_wait_us(100, 100, true);
 	} while (time_before(jiffies, timeout));
 
 	dev_err(hba->dev, "missing ack of refclk req, reg: 0x%x\n", value);
@@ -150,7 +139,7 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
 out:
 	host->ref_clk_enabled = on;
 	if (!on) {
-		ufs_mtk_udelay(host->ref_clk_gating_wait_us);
+		ufshcd_wait_us(host->ref_clk_gating_wait_us, 10, true);
 		ufs_mtk_ref_clk_notify(on, res);
 	}
 
@@ -430,12 +419,12 @@ static void ufs_mtk_device_reset(struct ufs_hba *hba)
 	 *
 	 * To be on safe side, keep the reset low for at least 10us.
 	 */
-	usleep_range(10, 15);
+	ufshcd_wait_us(10, 5, true);
 
 	ufs_mtk_device_reset_ctrl(1, res);
 
 	/* Some devices may need time to respond to rst_n */
-	usleep_range(10000, 15000);
+	ufshcd_wait_us(10000, 5000, true);
 
 	dev_info(hba->dev, "device reset done\n");
 }
-- 
2.18.0