mmc: host: sdhci-esdhc-imx: add wakeup feature for GPIO CD pin

Message ID 1590481839-28603-1-git-send-email-haibo.chen@nxp.com
State New
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Series
  • mmc: host: sdhci-esdhc-imx: add wakeup feature for GPIO CD pin
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Commit Message

BOUGH CHEN May 26, 2020, 8:30 a.m.
From: Haibo Chen <haibo.chen@nxp.com>

When use the specific GPIO to detect the card insert/remove, we can
also add the GPIO as a wakeup source. When system suspend, insert or
remove the card can wakeup the system.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
 drivers/mmc/host/sdhci-esdhc-imx.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 5398af4824c3..7af9d87d4245 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -1599,6 +1599,11 @@  static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
 	if (esdhc_is_usdhc(imx_data)) {
 		host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
 		host->mmc->caps |= MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR;
+
+		/* GPIO CD can be set as a wakeup source */
+		host->mmc->caps |= MMC_CAP_CD_WAKE;
+		device_init_wakeup(&pdev->dev, true);
+
 		if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200))
 			host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
 
@@ -1734,8 +1739,15 @@  static int sdhci_esdhc_suspend(struct device *dev)
 		mmc_retune_needed(host->mmc);
 
 	ret = sdhci_suspend_host(host);
-	if (!ret)
-		return pinctrl_pm_select_sleep_state(dev);
+	if (ret)
+		return ret;
+
+	ret = pinctrl_pm_select_sleep_state(dev);
+	if (ret)
+		return ret;
+
+	if (device_may_wakeup(dev))
+		ret = mmc_gpio_set_cd_wake(host->mmc, true);
 
 	return ret;
 }
@@ -1759,6 +1771,9 @@  static int sdhci_esdhc_resume(struct device *dev)
 	if (host->mmc->caps2 & MMC_CAP2_CQE)
 		ret = cqhci_resume(host->mmc);
 
+	if (!ret && device_may_wakeup(dev))
+		ret = mmc_gpio_set_cd_wake(host->mmc, false);
+
 	return ret;
 }
 #endif