mmc: Implement card detection.
Check for card detect each time an MMC/SD device is initialized. If card
detection is not implemented, this code behaves as before and continues
assuming a card is present. If no card is detected, has_init is reset
for the MMC/SD device (to force initialization next time) and an error
is returned.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Jason Liu <jason.hui@linaro.org>
diff --git a/drivers/mmc/mxcmmc.c b/drivers/mmc/mxcmmc.c
index ab1fc82..8afb221 100644
--- a/drivers/mmc/mxcmmc.c
+++ b/drivers/mmc/mxcmmc.c
@@ -500,6 +500,7 @@
mmc->send_cmd = mxcmci_request;
mmc->set_ios = mxcmci_set_ios;
mmc->init = mxcmci_init;
+ mmc->getcd = NULL;
mmc->host_caps = MMC_MODE_4BIT;
host->base = (struct mxcmci_regs *)CONFIG_MXC_MCI_REGS_BASE;