linux-kernel - [PATCH v2 2/2] mmc: sdhci-of-at91: replace while loop with read_poll

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Message-ID: <20210924082851.2132068-3-claudiu.beznea@microchip.com>
Date:   Fri, 24 Sep 2021 11:28:51 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <eugen.hristev@...rochip.com>, <adrian.hunter@...el.com>,
        <ulf.hansson@...aro.org>, <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <ludovic.desroches@...rochip.com>
CC:     <linux-mmc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH v2 2/2] mmc: sdhci-of-at91: replace while loop with read_poll_timeout

Replace while loop with read_poll_timeout().

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 drivers/mmc/host/sdhci-of-at91.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/mmc/host/sdhci-of-at91.c b/drivers/mmc/host/sdhci-of-at91.c
index 134ba01d3063..d1a1c548c515 100644
--- a/drivers/mmc/host/sdhci-of-at91.c
+++ b/drivers/mmc/host/sdhci-of-at91.c
@@ -62,7 +62,6 @@ static void sdhci_at91_set_force_card_detect(struct sdhci_host *host)
 static void sdhci_at91_set_clock(struct sdhci_host *host, unsigned int clock)
 {
 	u16 clk;
-	unsigned long timeout;
 
 	host->mmc->actual_clock = 0;
 
@@ -87,16 +86,11 @@ static void sdhci_at91_set_clock(struct sdhci_host *host, unsigned int clock)
 	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
 
 	/* Wait max 20 ms */
-	timeout = 20;
-	while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
-		& SDHCI_CLOCK_INT_STABLE)) {
-		if (timeout == 0) {
-			pr_err("%s: Internal clock never stabilised.\n",
-			       mmc_hostname(host->mmc));
-			return;
-		}
-		timeout--;
-		mdelay(1);
+	if (read_poll_timeout(sdhci_readw, clk, (clk & SDHCI_CLOCK_INT_STABLE),
+			      1000, 20000, false, host, SDHCI_CLOCK_CONTROL)) {
+		pr_err("%s: Internal clock never stabilised.\n",
+		       mmc_hostname(host->mmc));
+		return;
 	}
 
 	clk |= SDHCI_CLOCK_CARD_EN;
-- 
2.25.1