From: Ben Chuang <benchuanggli@gmail.com>
To: adrian.hunter@intel.com, ulf.hansson@linaro.org
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
johnsonm@danlj.org, ben.chuang@genesyslogic.com.tw,
Ben Chuang <benchuanggli@gmail.com>
Subject: [PATCH V5 1/4] mmc: sdhci: Change timeout of loop for checking internal clock stable
Date: Tue, 20 Aug 2019 10:06:25 +0800 [thread overview]
Message-ID: <20190820020625.8230-1-benchuanggli@gmail.com> (raw)
From: Ben Chuang <ben.chuang@genesyslogic.com.tw>
According to section 3.2.1 internal clock setup in SD Host Controller
Simplified Specifications 4.20, the timeout of loop for checking
internal clock stable is defined as 150ms.
Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Co-developed-by: Michael K Johnson <johnsonm@danlj.org>
Signed-off-by: Michael K Johnson <johnsonm@danlj.org>
---
drivers/mmc/host/sdhci.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 59acf8e3331e..bed0760a6c2a 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1636,8 +1636,8 @@ void sdhci_enable_clk(struct sdhci_host *host, u16 clk)
clk |= SDHCI_CLOCK_INT_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
- /* Wait max 20 ms */
- timeout = ktime_add_ms(ktime_get(), 20);
+ /* Wait max 150 ms */
+ timeout = ktime_add_ms(ktime_get(), 150);
while (1) {
bool timedout = ktime_after(ktime_get(), timeout);
--
2.22.1
next reply other threads:[~2019-08-20 2:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-20 2:06 Ben Chuang [this message]
2019-08-21 12:04 ` [PATCH V5 1/4] mmc: sdhci: Change timeout of loop for checking internal clock stable Adrian Hunter
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