mmc: core: Add card_busy to host_ops
This host_ops member is used to test if the card is signaling busy by
pulling dat[0:3] low.
Signed-off-by: Johan Rudholm <johan.rudholm@stericsson.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Wei WANG <wei_wang@realsil.com.cn>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 523d570..0373b0a 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -131,6 +131,9 @@
int (*start_signal_voltage_switch)(struct mmc_host *host, struct mmc_ios *ios);
+ /* Check if the card is pulling dat[0:3] low */
+ int (*card_busy)(struct mmc_host *host);
+
/* The tuning command opcode value is different for SD and eMMC cards */
int (*execute_tuning)(struct mmc_host *host, u32 opcode);
void (*enable_preset_value)(struct mmc_host *host, bool enable);