linux-kernel - [PATCH V2] mmc: sdhci-sprd: Fix minimum clock limit

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Message-Id: <20221011104935.10980-1-wenchao.chen666@gmail.com>
Date:   Tue, 11 Oct 2022 18:49:35 +0800
From:   Wenchao Chen <wenchao.chen666@...il.com>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org,
        orsonzhai@...il.com, baolin.wang@...ux.alibaba.com,
        zhang.lyra@...il.com
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        megoo.tang@...il.com, lzx.stg@...il.com
Subject: [PATCH V2] mmc: sdhci-sprd: Fix minimum clock limit

From: Wenchao Chen <wenchao.chen@...soc.com>

v1 -> v2:
 - Address Adrian's suggestions

Our controller supports 100K. During the test, it was found that mmc_rescan
failed to scan the card at 400K, and did not try 300K, 200K, and 100K. After
modifying the minimum clock limit to 100K, the card scan was successful

Signed-off-by: Wenchao Chen <wenchao.chen@...soc.com>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
---
 drivers/mmc/host/sdhci-sprd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
index 46c55ab4884c..b92a408f138d 100644
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -309,7 +309,7 @@ static unsigned int sdhci_sprd_get_max_clock(struct sdhci_host *host)
 
 static unsigned int sdhci_sprd_get_min_clock(struct sdhci_host *host)
 {
-	return 400000;
+	return 100000;
 }
 
 static void sdhci_sprd_set_uhs_signaling(struct sdhci_host *host,
-- 
2.17.1