The host limits are only one limit we must honor when changing the transmission frequency.
The SD cards have their own limits, so take them also into account.
Signed-off-by: Juergen Beisert <jbe@xxxxxxxxxxxxxx>
---
drivers/mci/mci-core.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index 9aeaa4d..42e3d4b 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -605,13 +605,17 @@ static void mci_set_clock(struct mci *mci, unsigned clock)
{
struct mci_host *host = mci->host;
- /* check against any given limits */
+ /* check against any given limits at the host's side */
if (clock > host->f_max)
clock = host->f_max;
if (clock < host->f_min)
clock = host->f_min;
+ /* check against the limit at the card's side */
+ if (mci->tran_speed != 0 && clock > mci->tran_speed)
+ clock = mci->tran_speed;
+
host->clock = clock; /* the new target frequency */
mci_set_ios(mci);
}
--
1.8.2.rc2
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