From: Paul Walmsley Date: Thu, 26 Jun 2008 00:09:41 +0000 (-0600) Subject: OMAP3 PM: enable hardware SAR for USBHOST, USBTLL modules X-Git-Tag: v2.6.26-omap1~97 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=0901f90f3a669f567e9c7230bbb9797b46887a98;p=linux-2.6-omap-h63xx.git OMAP3 PM: enable hardware SAR for USBHOST, USBTLL modules Enable hardware save-and-restore for the CORE and USBHOST powerdomains during PM layer initialization. On OMAP3, this only affects the USBTLL and USBHOST modules. There is probably a sleep and wakeup latency penalty with these enabled. No one seems to have quantified it yet. If the added latency is measurable, an alternate approach would be to only enable hardware save-and-restore if there are USB devices attached. Signed-off-by: Paul Walmsley Signed-off-by: Tony Lindgren --- diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index c7493f5828e..202c269568a 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -357,6 +357,10 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm) pwrst->pwrdm = pwrdm; pwrst->next_state = PWRDM_POWER_RET; list_add(&pwrst->node, &pwrst_list); + + if (pwrdm_has_hdwr_sar(pwrdm)) + pwrdm_enable_hdwr_sar(pwrdm); + return set_pwrdm_state(pwrst->pwrdm, pwrst->next_state); }