[PATCH 6/6] mmc: sdhci-omap: Configure optional wakeirq

Tony Lindgren
2021-10-15T10:47:44Z

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>
---
drivers/mmc/host/sdhci-omap.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
--- 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 */
--
2.33.0