[PATCH v5 2/4] mmc: core: Add card_busy to host_ops

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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@xxxxxxxxxxxxxx>
---
 include/linux/mmc/host.h |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 61a10c1..3b56ef2 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -131,6 +131,9 @@ struct mmc_host_ops {
 
 	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);
-- 
1.7.10

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