linux-kernel - [RFC PATCH V3 14/21] mmc: sdhci: UHS-II support, handle vdd2 in case of power-off

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Date:   Fri, 10 Jul 2020 19:11:21 +0800
From:   Ben Chuang <benchuanggli@...il.com>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        ben.chuang@...esyslogic.com.tw, takahiro.akashi@...aro.org,
        greg.tu@...esyslogic.com.tw, Ben Chuang <benchuanggli@...il.com>
Subject: [RFC PATCH V3 14/21] mmc: sdhci: UHS-II support, handle vdd2 in case of power-off

From: AKASHI Takahiro <takahiro.akashi@...aro.org>

Configure a regulator for VDD2 in case of power-off.

Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
---
 drivers/mmc/host/sdhci.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 7f2537648a08..d38d734ec83f 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2333,6 +2333,11 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		if (!IS_ERR(mmc->supply.vmmc) &&
 		    ios->power_mode == MMC_POWER_OFF)
 			mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
+		if (IS_ENABLED(CONFIG_MMC_SDHCI_UHS2) &&
+		    host->mmc->caps & MMC_CAP_UHS2 &&
+		    !IS_ERR(mmc->supply.vmmc2) &&
+		    ios->power_mode == MMC_POWER_OFF)
+			mmc_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0);
 		return;
 	}
 
-- 
2.27.0