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authorRoman Peniaev <r.peniaev@gmail.com>2014-06-10 23:57:02 +0900
committerUlf Hansson <ulf.hansson@linaro.org>2014-07-09 11:26:12 +0200
commit6f726f495f2d5247e1614a70f9093d9f4d6380e4 (patch)
treeccf90b2d548aaab928faa989a74caa715cf4789f /drivers/mmc
parentd222c4c0ce170cd81a74988fd2eb99230519f9ae (diff)
mmc: mxs: fix card detection in case of 'broken-cd' flag set
In case of reboot my olinuxino imx23 board does not see mmc card any more. mmc_rescan is being called by delayed work in loop, but mxs_mmc_get_cd always returns 0, so we will never pass the card detection check and will not do further card inition. This patch is just an attempt to partially revert the patch a91fe279ae of Sascha Hauer, where it is claimed that upper layer will handle broken card detection using the polling logic and MMC_CAP_NEEDS_POLL capability, but seems it is not true, because upper logic still expects 1 from 'get_cd'. So, here we always return 1 (card present) in case of MMC_CAP_NEEDS_POLL capability set. Signed-off-by: Roman Pen <r.peniaev@gmail.com> CC: Chris Ball <chris@printf.net> CC: Sascha Hauer <s.hauer@pengutronix.de> CC: Fabio Estevam <fabio.estevam@freescale.com> CC: Shawn Guo <shawn.guo@linaro.org> CC: Ulf Hansson <ulf.hansson@linaro.org> CC: linux-mmc@vger.kernel.org CC: linux-kernel@vger.kernel.org Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/mxs-mmc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index babfea03ba8a..140885a5a4e7 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -86,7 +86,8 @@ static int mxs_mmc_get_cd(struct mmc_host *mmc)
if (ret >= 0)
return ret;
- present = !(readl(ssp->base + HW_SSP_STATUS(ssp)) &
+ present = mmc->caps & MMC_CAP_NEEDS_POLL ||
+ !(readl(ssp->base + HW_SSP_STATUS(ssp)) &
BM_SSP_STATUS_CARD_DETECT);
if (mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH)