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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: Haibo Chen <haibo.chen@nxp.com>
Link: https://lore.kernel.org/r/1590547175-15070-1-git-send-email-haibo.chen@nxp.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Haibo Chen 2020-05-27 10:39:35 +08:00 committed by Ulf Hansson
parent 942d5e7bae
commit f614046261
1 changed files with 15 additions and 2 deletions
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17
drivers/mmc/host/sdhci-esdhc-imx.c
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@ -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