Adds Voltage scaling support
Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
---
arch/arm/mach-omap2/board-3430sdp.c | 12 ++++++++++++
arch/arm/mach-omap2/resource34xx.c | 17 ++++++++++++++++-
arch/arm/mach-omap2/resource34xx.h | 3 +++
3 files changed, 31 insertions(+), 1 deletion(-)
Index: linux-omap-2.6/arch/arm/mach-omap2/board-3430sdp.c
===================================================================
--- linux-omap-2.6.orig/arch/arm/mach-omap2/board-3430sdp.c 2008-08-11
17:16:07.000000000 +0530
+++ linux-omap-2.6/arch/arm/mach-omap2/board-3430sdp.c 2008-08-11
17:17:58.000000000 +0530
@@ -94,6 +94,18 @@ struct vdd_prcm_config iva2_rate_table[]
#define TWL4030_MSECURE_GPIO 22
+u8 vdd1_volts[MAX_VDD1_OPP] = {
+ /* Vsel corresponding to 0.9V (OPP1), 1.00V (OPP2),
+ * 1.20V (OPP3), 1.27V (OPP4), 1.35 (OPP5)
+ */
+ 0x18, 0x20, 0x30, 0x36, 0x3C
+};
+
+u8 vdd2_volts[MAX_VDD2_OPP] = {
+ /* Vsel corresponding to 0.9V (OPP1), 1.00V (OPP2), 1.15 (OPP3) */
+ 0x18, 0x20, 0x2C
+};
+
static struct resource sdp3430_smc91x_resources[] = {
[0] = {
.start = OMAP34XX_ETHR_START,
Index: linux-omap-2.6/arch/arm/mach-omap2/resource34xx.c
===================================================================
--- linux-omap-2.6.orig/arch/arm/mach-omap2/resource34xx.c 2008-08-11
17:17:23.000000000 +0530
+++ linux-omap-2.6/arch/arm/mach-omap2/resource34xx.c 2008-08-11
17:22:02.000000000 +0530
@@ -19,6 +19,7 @@
#include <linux/pm_qos_params.h>
#include <asm/arch/powerdomain.h>
#include <asm/arch/clockdomain.h>
+#include "smartreflex.h"
#include "resource34xx.h"
/**
@@ -174,10 +175,24 @@ int set_opp(struct shared_resource *resp
{
#ifdef CONFIG_MACH_OMAP_3430SDP
unsigned long mpu_freq;
+
+ if (resp->curr_level == target_level)
+ return 0;
+
if (strcmp(resp->name, "vdd1_opp") == 0) {
mpu_freq = get_freq(vdd1_rate_table + MAX_VDD1_OPP,
target_level);
- clk_set_rate(vdd1_clk, mpu_freq);
+ if (resp->curr_level > target_level) {
+ /* Scale Frequency and then voltage */
+ clk_set_rate(vdd1_clk, mpu_freq);
+ sr_voltagescale_vcbypass(PRCM_VDD1,
+ vdd1_volts[target_level-1]);
+ } else {
+ /* Scale Voltage and then frequency */
+ sr_voltagescale_vcbypass(PRCM_VDD1,
+ vdd1_volts[target_level-1]);
+ clk_set_rate(vdd1_clk, mpu_freq);
+ }
resp->curr_level = curr_vdd1_prcm_set->opp;
} else if (strcmp(resp->name, "vdd2_opp") == 0) {
/* Not supported yet */
Index: linux-omap-2.6/arch/arm/mach-omap2/resource34xx.h
===================================================================
--- linux-omap-2.6.orig/arch/arm/mach-omap2/resource34xx.h 2008-08-11
17:17:23.000000000 +0530
+++ linux-omap-2.6/arch/arm/mach-omap2/resource34xx.h 2008-08-11
17:17:58.000000000 +0530
@@ -33,6 +33,9 @@ extern unsigned int get_opp(struct vdd_p
extern struct vdd_prcm_config vdd1_rate_table[];
extern struct vdd_prcm_config vdd2_rate_table[];
extern struct vdd_prcm_config iva2_rate_table[];
+extern u8 vdd1_volts[];
+extern u8 vdd2_volts[];
+extern int sr_voltagescale_vcbypass(u32 target_opp, u8 vsel);
/**
* mpu_latency/core_latency are used to control the cpuidle C state.
*/
--
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