diff mbox

[03/06] OMAP3: PM: VDD2 dvfs at higher VDD1 opp

Message ID 1243514587-5323-3-git-send-email-rnayak@ti.com (mailing list archive)
State Accepted
Delegated to: Kevin Hilman
Headers show

Commit Message

Rajendra Nayak May 28, 2009, 12:43 p.m. UTC 
This patch makes sure that VDD2 dvfs always happens at
a higher VDD1 OPP, hence bringing down the VDD2 DVFS latency
to a large extent.
Having a smaller VDD2 dvfs latency helps drivers which are sensitive
to the time during which SDRAM is inaccessible due to SDRC iclk being
disabled.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
---
 arch/arm/mach-omap2/resource34xx.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/arch/arm/mach-omap2/resource34xx.c b/arch/arm/mach-omap2/resource34xx.c
index 9908e52..4c87436 100644
--- a/arch/arm/mach-omap2/resource34xx.c
+++ b/arch/arm/mach-omap2/resource34xx.c
@@ -353,6 +353,9 @@  int set_opp(struct shared_resource *resp, u32 target_level)
 	int ind;
 
 	if (resp == vdd1_resp) {
+		if (target_level < 3)
+			resource_release("vdd2_opp", &vdd2_dev);
+
 		resource_set_opp_level(VDD1_OPP, target_level, 0);
 		/*
 		 * For VDD1 OPP3 and above, make sure the interconnect
@@ -361,8 +364,6 @@  int set_opp(struct shared_resource *resp, u32 target_level)
 		 */
 		if (target_level >= 3)
 			resource_request("vdd2_opp", &vdd2_dev, 400000);
-		else
-			resource_release("vdd2_opp", &vdd2_dev);
 
 	} else if (resp == vdd2_resp) {
 		tput = target_level;