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authorJohan Rudholm <johan.rudholm@stericsson.com>2013-01-28 15:08:25 +0100
committerChris Ball <cjb@laptop.org>2013-02-24 14:37:06 -0500
commit276e090f9217b69e46d8255132d2667ac5eec51b (patch)
tree88bdee868736daed897cde6b498e2d51abd28091 /drivers/mmc/core/core.c
parent3f8a7fabd60e83eb2fb7add00d353d455c0e7a78 (diff)
mmc: core: Add mmc_power_cycle
Add mmc_power_cycle which can be used to power cycle for instance SD-cards. 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>
Diffstat (limited to 'drivers/mmc/core/core.c')
-rw-r--r--drivers/mmc/core/core.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 39f28af34cb6..789056fbfc93 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1470,6 +1470,14 @@ void mmc_power_off(struct mmc_host *host)
mmc_host_clk_release(host);
}
+void mmc_power_cycle(struct mmc_host *host)
+{
+ mmc_power_off(host);
+ /* Wait at least 1 ms according to SD spec */
+ mmc_delay(1);
+ mmc_power_up(host);
+}
+
/*
* Cleanup when the last reference to the bus operator is dropped.
*/