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authorTony Lindgren <tony@atomide.com>2021-10-15 13:47:20 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2021-10-19 14:01:46 +0300
commita1e97bd2e0773fd8459f9f78ab923f69d5647571 (patch)
tree9bdf4e253eff52cbe823a25acbfca6d9d2359916 /drivers/mmc
parent3edf588e7fe00e90d1dc7fb9e599861b2c2cf442 (diff)
downloadlinux-a1e97bd2e0773fd8459f9f78ab923f69d5647571.tar.xz
mmc: sdhci-omap: Configure optional wakeirq
Configure optional wakeirq. This may be optionally configured for SDIO dat1 pin for wake-up events for SoCs that support deeper idle states. Signed-off-by: Tony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/20211015104720.52240-7-tony@atomide.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-omap.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
index 660f4d4c27a4..0dec2f849b81 100644
--- a/drivers/mmc/host/sdhci-omap.c
+++ b/drivers/mmc/host/sdhci-omap.c
@@ -12,8 +12,10 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
+#include <linux/pm_wakeirq.h>
#include <linux/regulator/consumer.h>
#include <linux/pinctrl/consumer.h>
#include <linux/sys_soc.h>
@@ -117,6 +119,7 @@ struct sdhci_omap_host {
struct pinctrl *pinctrl;
struct pinctrl_state **pinctrl_state;
+ int wakeirq;
bool is_tuning;
/* Offset for omap specific registers from base */
@@ -1358,6 +1361,25 @@ static int sdhci_omap_probe(struct platform_device *pdev)
if (ret)
goto err_cleanup_host;
+ /*
+ * SDIO devices can use the dat1 pin as a wake-up interrupt. Some
+ * devices like wl1xxx, use an out-of-band GPIO interrupt instead.
+ */
+ omap_host->wakeirq = of_irq_get_byname(dev->of_node, "wakeup");
+ if (omap_host->wakeirq == -EPROBE_DEFER) {
+ ret = -EPROBE_DEFER;
+ goto err_cleanup_host;
+ }
+ if (omap_host->wakeirq > 0) {
+ device_init_wakeup(dev, true);
+ ret = dev_pm_set_dedicated_wake_irq(dev, omap_host->wakeirq);
+ if (ret) {
+ device_init_wakeup(dev, false);
+ goto err_cleanup_host;
+ }
+ host->mmc->pm_caps |= MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
+ }
+
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
@@ -1385,6 +1407,8 @@ static int sdhci_omap_remove(struct platform_device *pdev)
pm_runtime_get_sync(dev);
sdhci_remove_host(host, true);
+ device_init_wakeup(dev, false);
+ dev_pm_clear_wake_irq(dev);
pm_runtime_dont_use_autosuspend(dev);
pm_runtime_put_sync(dev);
/* Ensure device gets disabled despite userspace sysfs config */