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From: Baolin Wang <baolin.wang7@gmail.com>
To: adrian.hunter@intel.com, ulf.hansson@linaro.org
Cc: orsonzhai@gmail.com, zhang.lyra@gmail.com,
	baolin.wang7@gmail.com, linux-mmc@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] mmc: host: sdhci-sprd: Set the missing MMC_CAP_WAIT_WHILE_BUSY flag
Date: Mon, 24 Feb 2020 17:08:49 +0800	[thread overview]
Message-ID: <96f16647f6a6e8cb058c44e46c61b122df027059.1582535202.git.baolin.wang7@gmail.com> (raw)

The Spreadtrum host controller supports HW busy detection for I/O
operations, which means when the host gets a transfer complete event,
that always indicates the busy signal is released. Thus we can set
the MMC_CAP_WAIT_WHILE_BUSY flag to remove some redundant software
busy polling.

Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
---
 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 d346223..2ab42c5 100644
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -556,7 +556,7 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
 		sdhci_sprd_voltage_switch;
 
 	host->mmc->caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED |
-		MMC_CAP_ERASE | MMC_CAP_CMD23;
+		MMC_CAP_ERASE | MMC_CAP_CMD23 | MMC_CAP_WAIT_WHILE_BUSY;
 	ret = mmc_of_parse(host->mmc);
 	if (ret)
 		goto pltfm_free;
-- 
1.9.1


             reply	other threads:[~2020-02-24  9:09 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-24  9:08 Baolin Wang [this message]
2020-02-27 13:19 ` [PATCH] mmc: host: sdhci-sprd: Set the missing MMC_CAP_WAIT_WHILE_BUSY flag Adrian Hunter
2020-03-04 15:34 ` Ulf Hansson
2020-03-05  1:16   ` Baolin Wang

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