[PATCH 4/6] mmc: sdhci-esdhc-imx: set the correct max timeout value for uSDHC

[Dong Aisheng]

The default sdhci driver write 0xE into timeout counter register to
set the maximum timeout. The value is not correct for uSDHC since the
max counter value for uSDHC is 0xF.
Instead of using common timeout code in sdhci, we implement esdhc_set_timeout
to handle the difference between eSDHC and uSDHC.

Signed-off-by: Dong Aisheng <b29396 at freescale.com>
---
 drivers/mmc/host/sdhci-esdhc-imx.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 97b35e1..c24cb23 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -868,6 +868,16 @@ unsigned int esdhc_get_max_timeout(struct sdhci_host *host)
 	return max_to / (esdhc_pltfm_get_max_clock(host) / 1000);
 }
 
+void esdhc_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+
+	/* use maximum timeout counter */
+	sdhci_writeb(host, esdhc_is_usdhc(imx_data) ? 0xF : 0xE,
+			SDHCI_TIMEOUT_CONTROL);
+}
+
 static struct sdhci_ops sdhci_esdhc_ops = {
 	.read_l = esdhc_readl_le,
 	.read_w = esdhc_readw_le,
@@ -881,6 +891,7 @@ static struct sdhci_ops sdhci_esdhc_ops = {
 	.platform_bus_width = esdhc_pltfm_bus_width,
 	.set_uhs_signaling = esdhc_set_uhs_signaling,
 	.get_max_timeout = esdhc_get_max_timeout,
+	.set_timeout = esdhc_set_timeout,
 };
 
 static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
-- 
1.7.2.rc3