diff options
| author | Peter 'p2' De Schrijver <peter.de-schrijver@nokia.com> | 2009-01-19 20:09:22 +0300 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-05-28 21:59:09 +0400 |
| commit | 94a3ef6f2888ae995a8d112e277ed8465a9457fb (patch) | |
| tree | e5ffaac8e9da9200faeae481f052b06e41ae8b99 /arch/arm/mach-omap2/usb-musb.c | |
| parent | 01cbd4d11558e2e4c10f14bb8aecd799b22bca35 (diff) | |
| download | linux-94a3ef6f2888ae995a8d112e277ed8465a9457fb.tar.xz | |
OMAP3: PM: Ensure MUSB block can idle when driver not loaded
Otherwise, bootloaders may leave MUSB in a state which prevents
retention.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-omap2/usb-musb.c')
| -rw-r--r-- | arch/arm/mach-omap2/usb-musb.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c index 215d463b70e3..d85296dc896c 100644 --- a/arch/arm/mach-omap2/usb-musb.c +++ b/arch/arm/mach-omap2/usb-musb.c @@ -31,6 +31,17 @@ #include <mach/mux.h> #include <mach/usb.h> +#define OTG_SYSCONFIG (OMAP34XX_HSUSB_OTG_BASE + 0x404) + +static void __init usb_musb_pm_init(void) +{ + /* Ensure force-idle mode for OTG controller */ + if (cpu_is_omap34xx()) + omap_writel(0, OTG_SYSCONFIG); +} + +#ifdef CONFIG_USB_MUSB_SOC + static struct resource musb_resources[] = { [0] = { /* start and end set dynamically */ .flags = IORESOURCE_MEM, @@ -183,4 +194,13 @@ void __init usb_musb_init(void) printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n"); return; } + + usb_musb_pm_init(); +} + +#else +void __init usb_musb_init(void) +{ + usb_musb_pm_init(); } +#endif /* CONFIG_USB_MUSB_SOC */ |