diff options
Diffstat (limited to 'recipes/linux/linux-omap-2.6.26/beagleboard/08-omappm-voltagescaling.eml')
| -rw-r--r-- | recipes/linux/linux-omap-2.6.26/beagleboard/08-omappm-voltagescaling.eml | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap-2.6.26/beagleboard/08-omappm-voltagescaling.eml b/recipes/linux/linux-omap-2.6.26/beagleboard/08-omappm-voltagescaling.eml new file mode 100644 index 0000000000..a7885774f4 --- /dev/null +++ b/recipes/linux/linux-omap-2.6.26/beagleboard/08-omappm-voltagescaling.eml @@ -0,0 +1,96 @@ +Adds Voltage scaling support + +Signed-off-by: Rajendra Nayak <rnayak@ti.com> +--- + 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. + */ + + +-- +To unsubscribe from this list: send the line "unsubscribe linux-omap" in +the body of a message to majordomo@vger.kernel.org +More majordomo info at http://vger.kernel.org/majordomo-info.html |