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Message-Id: <20180221124538.908072794@linuxfoundation.org>
Date: Wed, 21 Feb 2018 13:49:52 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, "yinbo.zhu" <yinbo.zhu@....com>,
Yangbo Lu <yangbo.lu@....com>,
Adrian Hunter <adrian.hunter@...el.com>,
Ulf Hansson <ulf.hansson@...aro.org>,
Rasmus Villemoes <rasmus.villemoes@...vas.dk>
Subject: [PATCH 4.15 163/163] mmc: sdhci-of-esdhc: fix the mmc error after sleep on ls1046ardb
4.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: yinbo.zhu <yinbo.zhu@....com>
commit f2bc600008bd6f7f5d0b6b56238d14f95cd454d2 upstream.
When system wakes up from sleep on ls1046ardb, the SD operation fails
with mmc error messages since ESDHC_TB_EN bit couldn't be cleaned by
eSDHC_SYSCTL[RSTA]. It's proper to clean this bit in esdhc_reset()
rather than in probe.
Signed-off-by: yinbo.zhu <yinbo.zhu@....com>
Acked-by: Yangbo Lu <yangbo.lu@....com>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Cc: Rasmus Villemoes <rasmus.villemoes@...vas.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/mmc/host/sdhci-of-esdhc.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -589,10 +589,18 @@ static void esdhc_pltfm_set_bus_width(st
static void esdhc_reset(struct sdhci_host *host, u8 mask)
{
+ u32 val;
+
sdhci_reset(host, mask);
sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+
+ if (mask & SDHCI_RESET_ALL) {
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_TB_EN;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+ }
}
/* The SCFG, Supplemental Configuration Unit, provides SoC specific
@@ -785,10 +793,6 @@ static void esdhc_init(struct platform_d
pltfm_host = sdhci_priv(host);
esdhc = sdhci_pltfm_priv(pltfm_host);
- val = sdhci_readl(host, ESDHC_TBCTL);
- val &= ~ESDHC_TB_EN;
- sdhci_writel(host, val, ESDHC_TBCTL);
-
host_ver = sdhci_readw(host, SDHCI_HOST_VERSION);
esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >>
SDHCI_VENDOR_VER_SHIFT;
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