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authorHaibo Chen <haibo.chen@nxp.com>2020-05-27 05:39:35 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2020-05-29 13:38:00 +0300
commitf61404626113080863c904a459576ba0c03a49ba (patch)
treea9062a0802f2cd5364b372639a6f0b327b0b5946 /drivers/mmc
parent942d5e7bae36153a232102809bdf8b0a5ab110dc (diff)
downloadlinux-f61404626113080863c904a459576ba0c03a49ba.tar.xz
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>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-esdhc-imx.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 5398af4824c3..5a27511438c8 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -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