[PATCH 6.6 019/122] mmc: omap: restore original power up/down steps

Greg Kroah-Hartman
2024-04-15T14:33:03Z

From: Aaro Koskinen <aaro.koskinen@iki.fi>

[ Upstream commit 894ad61b85d6ba8efd4274aa8719d9ff1c89ea54 ]

Commit e519f0bb64ef ("ARM/mmc: Convert old mmci-omap to GPIO descriptors")
moved Nokia N810 MMC power up/down from the board file into the MMC driver.

The change removed some delays, and ordering without a valid reason.
Restore power up/down to match the original code. This matters only on N810
where the 2nd GPIO is in use. Other boards will see an additional delay but
that should be a lesser concern than omitting delays altogether.

Fixes: e519f0bb64ef ("ARM/mmc: Convert old mmci-omap to GPIO descriptors")
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Message-ID: <20240223181439.1099750-6-aaro.koskinen@iki.fi>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mmc/host/omap.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 50408771ae01c..13fa8588e38c1 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -1119,10 +1119,25 @@ static void mmc_omap_set_power(struct mmc_omap_slot *slot, int power_on,

host = slot->host;

- if (slot->vsd)
- gpiod_set_value(slot->vsd, power_on);
- if (slot->vio)
- gpiod_set_value(slot->vio, power_on);
+ if (power_on) {
+ if (slot->vsd) {
+ gpiod_set_value(slot->vsd, power_on);
+ msleep(1);
+ }
+ if (slot->vio) {
+ gpiod_set_value(slot->vio, power_on);
+ msleep(1);
+ }
+ } else {
+ if (slot->vio) {
+ gpiod_set_value(slot->vio, power_on);
+ msleep(50);
+ }
+ if (slot->vsd) {
+ gpiod_set_value(slot->vsd, power_on);
+ msleep(50);
+ }
+ }

if (slot->pdata->set_power != NULL)
slot->pdata->set_power(mmc_dev(slot->mmc), slot->id, power_on,
--
2.43.0