linux-kernel - [PATCH] mmc: sdhci-sprd: disable polling scan for sdio card

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Message-ID: <20221219084754.11070-1-wenchao.chen@unisoc.com>
Date:   Mon, 19 Dec 2022 16:47:54 +0800
From:   Wenchao Chen <wenchao.chen@...soc.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>,
        <zhenxiong.lai@...soc.com>, <yuelin.tang@...soc.com>,
        <wenchao.chen666@...il.com>
Subject: [PATCH] mmc: sdhci-sprd: disable polling scan for sdio card

Enable polling will increase the power consumption of the host.

Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Signed-off-by: Wenchao Chen <wenchao.chen@...soc.com>
---
 drivers/mmc/host/sdhci-sprd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
index 525f979e2a97..113a5c77578f 100644
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -696,6 +696,10 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_cleanup_host;
 
+	if ((host->mmc->caps2 & MMC_CAP2_NO_SD) &&
+			(host->mmc->caps2 & MMC_CAP2_NO_MMC))
+		host->mmc->caps &= ~MMC_CAP_NEEDS_POLL;
+
 	pm_runtime_mark_last_busy(&pdev->dev);
 	pm_runtime_put_autosuspend(&pdev->dev);
 
-- 
2.17.1