From: Jonas Karlman <jonas@kwiboo.se>
Date: Wed, 19 Jul 2023 21:21:00 +0000 (+0000)
Subject: mmc: dw_mmc: Keep vqmmc-supply enable count in balance
X-Git-Tag: accepted/tizen/unified/20241101.174134~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fe5771dcbbf151887e13eac07d00db67376429d2;p=platform%2Fkernel%2Fu-boot.git

mmc: dw_mmc: Keep vqmmc-supply enable count in balance

With the commit 4fcba5d556b4 ("regulator: implement basic reference
counter"), keeping regulator enablement in balance become more important.

Disable vqmmc-supply before signal voltage is changed to keep regulator
enable counter in balance.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
[backport of the commit 01b2917a1973b804338d3edbbd46198c540ba9f5 from mainline]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Change-Id: Ibd99b3b236906554c5ed17d5b1564f1fd0fc00fe
---

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index c93f002210..68bf0a6bb0 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -509,6 +509,10 @@ static int dwmci_set_ios(struct mmc *mmc)
 	if (mmc->vqmmc_supply) {
 		int ret;
 
+		ret = regulator_set_enable_if_allowed(mmc->vqmmc_supply, false);
+		if (ret)
+			return ret;
+
 		if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
 			regulator_set_value(mmc->vqmmc_supply, 1800000);
 		else