From: Jerry Huang <chang-ming.hu...@freescale.com>
In order to check whether the card has been removed, the function
mmc_send_status() will send command CMD13 to card and ask the card
to send its status register to sdhc driver, which will generate
many interrupts repeatedly and make the system performance bad.
Therefore, add callback function get_cd() to check whether
the card has been removed when the driver has this callback function.
Signed-off-by: Jerry Huang <chang-ming.hu...@freescale.com>
---
drivers/mmc/core/mmc.c | 5 ++++-
drivers/mmc/core/sd.c | 5 ++++-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index dbf421a..7ab404c 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1115,7 +1115,10 @@ static void mmc_detect(struct mmc_host *host)
/*
* Just check if our card has been removed.
*/
- err = mmc_send_status(host->card, NULL);
+ if (host->ops->get_cd)
+ err = !host->ops->get_cd(host);
+ else
+ err = mmc_send_status(host->card, NULL);
mmc_release_host(host);
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index f2a05ea..c652883 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -1033,7 +1033,10 @@ static void mmc_sd_detect(struct mmc_host *host)
/*
* Just check if our card has been removed.
*/
- err = mmc_send_status(host->card, NULL);
+ if (host->ops->get_cd)
+ err = !host->ops->get_cd(host);
+ else
+ err = mmc_send_status(host->card, NULL);
mmc_release_host(host);
--
1.7.5.4
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