From: Tero Kristo <tero.kristo@xxxxxxxxx>
This patch will allow device to enter sleep mode while a USB cable is
connected and USB is either disabled or built as a module from kernel
config.
Applies on top of PM branch.
Signed-off-by: Tero Kristo <tero.kristo@xxxxxxxxx>
---
arch/arm/mach-omap2/usb-musb.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
index 12a9b0a..dd51d2f 100644
--- a/arch/arm/mach-omap2/usb-musb.c
+++ b/arch/arm/mach-omap2/usb-musb.c
@@ -32,7 +32,9 @@
#include <mach/usb.h>
#define AUTOIDLE (1 << 0)
+#define FORCESTDBY (1 << 0)
#define OTG_SYSCONFIG (OMAP34XX_HSUSB_OTG_BASE + 0x404)
+#define OTG_FORCESTDBY (OMAP34XX_HSUSB_OTG_BASE + 0x414)
static struct resource musb_resources[] = {
[0] = { /* start and end set dynamically */
@@ -185,7 +187,11 @@ void __init usb_musb_init(void)
return;
}
- /* Enable smartidle on MUSB to improve C1 wakeup latency */
- if (cpu_is_omap34xx())
+#if !defined(CONFIG_USB) || defined(CONFIG_USB_MODULE)
+ /* Force MUSB to standby if not used */
+ if (cpu_is_omap34xx()) {
omap_writel(AUTOIDLE, OTG_SYSCONFIG);
+ omap_writel(FORCESTDBY, OTG_FORCESTDBY);
+ }
+#endif
}
--
1.5.4.3
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