[PATCH 3.16.y-ckt 117/118] mmc: sdhci: Fix FSL ESDHC reset handling quirk

From: Luis Henriques
Date: Wed Aug 12 2015 - 05:02:29 EST

3.16.7-ckt16 -stable review patch. If anyone has any objections, please let me know.


From: Alessio Igor Bogani <alessio.bogani@xxxxxxxxxx>

commit 304f0a98d168563b5f69c53a7544c36e6d221ac4 upstream.

The commit 0718e59ae259 ("mmc: sdhci: move FSL ESDHC reset handling quirk into
esdhc code") states that Freescale esdhc is the only controller which needs
the interrupt registers restored after a reset. So it moves
SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET quirk handling code into the
esdhc-imx driver only. Unfortunately the same controller is used in
other boards which use the of-esdhc driver instead (like powerpc P2020).

Restore interrupts after reset in the sdhci-of-esdhc driver also.

Signed-off-by: Alessio Igor Bogani <alessio.bogani@xxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Cc: Jakub Kicinski <kubakici@xxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
drivers/mmc/host/sdhci-of-esdhc.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 8be4dcfb49a0..fdc27327aece 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -276,6 +276,14 @@ static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)

+static void esdhc_reset(struct sdhci_host *host, u8 mask)
+ sdhci_reset(host, mask);
+ sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
+ sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
static const struct sdhci_ops sdhci_esdhc_ops = {
.read_l = esdhc_readl,
.read_w = esdhc_readw,
@@ -290,7 +298,7 @@ static const struct sdhci_ops sdhci_esdhc_ops = {
.platform_init = esdhc_of_platform_init,
.adma_workaround = esdhci_of_adma_workaround,
.set_bus_width = esdhc_pltfm_set_bus_width,
- .reset = sdhci_reset,
+ .reset = esdhc_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,

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