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authorTony Lindgren <tony@atomide.com>2021-05-18 10:44:49 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-05-21 15:07:16 +0300
commit62d472d8ad886d3e3fe2da20ba0965f8628513db (patch)
tree30abb35c2f7f2d5b770d66548b5ebb3ca46226d2 /drivers/usb/musb
parentc5c7489dc98296841fdf4fc4bfc52727a2057f24 (diff)
downloadlinux-62d472d8ad886d3e3fe2da20ba0965f8628513db.tar.xz
usb: musb: Add missing PM suspend and resume functions for 2430 glue
Looks like we are missing suspend and resume functions for pm_ops that are needed to idle the hardware for system suspend for 2430 glue layer. We can rely on the driver internal PM runtime state, and call driver functions to idle the hardware on suspend if needed. There is no need to add a dependency to PM runtime for system suspend here. Signed-off-by: Tony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/20210518074449.17070-1-tony@atomide.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb')
-rw-r--r--drivers/usb/musb/omap2430.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 4232f1ce3fbf..640a46f0d118 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -33,6 +33,8 @@ struct omap2430_glue {
enum musb_vbus_id_status status;
struct work_struct omap_musb_mailbox_work;
struct device *control_otghs;
+ unsigned int is_runtime_suspended:1;
+ unsigned int needs_resume:1;
};
#define glue_to_musb(g) platform_get_drvdata(g->musb)
@@ -459,6 +461,8 @@ static int omap2430_runtime_suspend(struct device *dev)
phy_power_off(musb->phy);
phy_exit(musb->phy);
+ glue->is_runtime_suspended = 1;
+
return 0;
}
@@ -480,12 +484,40 @@ static int omap2430_runtime_resume(struct device *dev)
/* Wait for musb to get oriented. Otherwise we can get babble */
usleep_range(200000, 250000);
+ glue->is_runtime_suspended = 0;
+
return 0;
}
+static int omap2430_suspend(struct device *dev)
+{
+ struct omap2430_glue *glue = dev_get_drvdata(dev);
+
+ if (glue->is_runtime_suspended)
+ return 0;
+
+ glue->needs_resume = 1;
+
+ return omap2430_runtime_suspend(dev);
+}
+
+static int omap2430_resume(struct device *dev)
+{
+ struct omap2430_glue *glue = dev_get_drvdata(dev);
+
+ if (!glue->needs_resume)
+ return 0;
+
+ glue->needs_resume = 0;
+
+ return omap2430_runtime_resume(dev);
+}
+
static const struct dev_pm_ops omap2430_pm_ops = {
.runtime_suspend = omap2430_runtime_suspend,
.runtime_resume = omap2430_runtime_resume,
+ .suspend = omap2430_suspend,
+ .resume = omap2430_resume,
};
#define DEV_PM_OPS (&omap2430_pm_ops)