mmc: sh_mmcif: support aggressive clock gating
To support MMC aggressive clock gating the driver has to stop the
interface clock when the .set_ios() method is called with .clock == 0.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index aea8626..af97015 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -844,15 +844,15 @@
struct sh_mmcif_host *host = mmc_priv(mmc);
struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
- if (ios->power_mode == MMC_POWER_OFF) {
- /* clock stop */
- sh_mmcif_clock_control(host, 0);
- if (p->down_pwr)
- p->down_pwr(host->pd);
- return;
- } else if (ios->power_mode == MMC_POWER_UP) {
+ if (ios->power_mode == MMC_POWER_UP) {
if (p->set_pwr)
p->set_pwr(host->pd, ios->power_mode);
+ } else if (ios->power_mode == MMC_POWER_OFF || !ios->clock) {
+ /* clock stop */
+ sh_mmcif_clock_control(host, 0);
+ if (ios->power_mode == MMC_POWER_OFF && p->down_pwr)
+ p->down_pwr(host->pd);
+ return;
}
if (ios->clock)