Commit f6140462 authored by Haibo Chen's avatar Haibo Chen Committed by Ulf Hansson
Browse files

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



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: default avatarHaibo Chen <haibo.chen@nxp.com>
Link: https://lore.kernel.org/r/1590547175-15070-1-git-send-email-haibo.chen@nxp.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 942d5e7b

drivers/mmc/host/sdhci-esdhc-imx.c

+15 −2
Original line number Diff line number Diff line
@@ -1599,6 +1599,10 @@ 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;



		if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200))

			host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
@@ -1734,8 +1738,14 @@ 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;



	ret = mmc_gpio_set_cd_wake(host->mmc, true);



	return ret;

}
@@ -1759,6 +1769,9 @@ static int sdhci_esdhc_resume(struct device *dev) 
	if (host->mmc->caps2 & MMC_CAP2_CQE)

		ret = cqhci_resume(host->mmc);



	if (!ret)

		ret = mmc_gpio_set_cd_wake(host->mmc, false);



	return ret;

}

#endif

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