linux-kernel - [PATCH V1] mmc: sdhci-msm: Add system suspend/resume callbacks

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Message-Id: <1579617022-13031-1-git-send-email-sbhanu@codeaurora.org>
Date:   Tue, 21 Jan 2020 20:00:22 +0530
From:   Shaik Sajida Bhanu <sbhanu@...eaurora.org>
To:     ulf.hansson@...aro.org, adrian.hunter@...el.com
Cc:     asutoshd@...eaurora.org, stummala@...eaurora.org,
        vbadigan@...eaurora.org, sayalil@...eaurora.org,
        cang@...eaurora.org, rampraka@...eaurora.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, agross@...nel.org,
        bjorn.andersson@...aro.org,
        Shaik Sajida Bhanu <sbhanu@...eaurora.org>
Subject: [PATCH V1] mmc: sdhci-msm: Add system suspend/resume callbacks

Add system suspend/resume callbacks to sdhci-msm platform driver.

Signed-off-by: Shaik Sajida Bhanu <sbhanu@...eaurora.org>
---
 drivers/mmc/host/sdhci-msm.c | 47 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 45 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 71f29ba..4984857 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -2028,9 +2028,52 @@ static __maybe_unused int sdhci_msm_runtime_resume(struct device *dev)
 	return 0;
 }
 
+static int sdhci_msm_suspend(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+	int ret = 0;
+
+	if (host->mmc->caps2 & MMC_CAP2_CQE) {
+		ret = cqhci_suspend(host->mmc);
+		if (ret)
+			return ret;
+	}
+
+	disable_irq(msm_host->pwr_irq);
+	ret = sdhci_suspend_host(host);
+	if (ret)
+		return ret;
+
+	return sdhci_msm_runtime_suspend(dev);
+}
+
+static int sdhci_msm_resume(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+	int ret = 0;
+
+	ret = sdhci_msm_runtime_resume(dev);
+	if (ret)
+		return ret;
+
+	ret = sdhci_resume_host(host);
+	if (ret < 0)
+		return ret;
+	enable_irq(msm_host->pwr_irq);
+
+	if (host->mmc->caps2 & MMC_CAP2_CQE)
+		ret = cqhci_resume(host->mmc);
+
+	return ret;
+}
+
 static const struct dev_pm_ops sdhci_msm_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
-				pm_runtime_force_resume)
+	SET_SYSTEM_SLEEP_PM_OPS(sdhci_msm_suspend,
+				sdhci_msm_resume)
 	SET_RUNTIME_PM_OPS(sdhci_msm_runtime_suspend,
 			   sdhci_msm_runtime_resume,
 			   NULL)
-- 
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