[ARM] OMAP3: move USBHOST SAR handling from clock framework to powerdomain layer

Remove usbhost_sar_fclk from the OMAP3 clock framework.  The bit that
the clock was tweaking doesn't actually enable or disable a clock; it
controls whether the hardware will save and restore USBHOST state
when the powerdomain changes state.  (That happens to coincidentally
enable a clock for the duration of the operation, hence the earlier
confusion.)

In place of the clock, mark the USBHOST powerdomain as supporting
hardware save-and-restore functionality.

linux-omap source commit is f3ceac86a9d425d101d606d87a5af44afef27179.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/powerdomains34xx.h b/arch/arm/mach-omap2/powerdomains34xx.h
index f573f7108398..3a8e4fbea5f2 100644
--- a/arch/arm/mach-omap2/powerdomains34xx.h
+++ b/arch/arm/mach-omap2/powerdomains34xx.h
@@ -312,6 +312,7 @@ static struct powerdomain usbhost_pwrdm = {
         .sleepdep_srcs    = dss_per_usbhost_sleepdeps,
         .pwrsts           = PWRSTS_OFF_RET_ON,
         .pwrsts_logic_ret = PWRDM_POWER_RET,
+        .flags            = PWRDM_HAS_HDWR_SAR, /* for USBHOST ctrlr only */
         .banks            = 1,
         .pwrsts_mem_ret   = {
                 [0] = PWRDM_POWER_RET, /* MEMRETSTATE */