diff options
Diffstat (limited to 'recipes/linux/linux-omap2-git/beagleboard/09-omappm-vdd2-scaling.eml')
| -rw-r--r-- | recipes/linux/linux-omap2-git/beagleboard/09-omappm-vdd2-scaling.eml | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap2-git/beagleboard/09-omappm-vdd2-scaling.eml b/recipes/linux/linux-omap2-git/beagleboard/09-omappm-vdd2-scaling.eml new file mode 100644 index 0000000000..532a9f7975 --- /dev/null +++ b/recipes/linux/linux-omap2-git/beagleboard/09-omappm-vdd2-scaling.eml @@ -0,0 +1,102 @@ +Adds VDD2 scaling support + +Signed-off-by: Rajendra Nayak <rnayak@ti.com> +--- + arch/arm/mach-omap2/resource34xx.c | 35 +++++++++++++++++++++++++++++++++-- + arch/arm/plat-omap/omap-pm-srf.c | 15 +++++---------- + 2 files changed, 38 insertions(+), 12 deletions(-) + +Index: linux-omap-2.6/arch/arm/mach-omap2/resource34xx.c +=================================================================== +--- linux-omap-2.6.orig/arch/arm/mach-omap2/resource34xx.c 2008-07-21 +12:10:22.032527379 +0530 ++++ linux-omap-2.6/arch/arm/mach-omap2/resource34xx.c 2008-07-21 +12:10:22.479513287 +0530 +@@ -174,7 +174,9 @@ void init_opp(struct shared_resource *re + int set_opp(struct shared_resource *resp, u32 target_level) + { + #ifdef CONFIG_MACH_OMAP_3430SDP +- unsigned long mpu_freq; ++ unsigned long mpu_freq, l3_freq, tput; ++ int ind; ++ struct bus_throughput_db *tput_db; + + if (resp->curr_level == target_level) + return 0; +@@ -195,7 +197,36 @@ int set_opp(struct shared_resource *resp + } + resp->curr_level = curr_vdd1_prcm_set->opp; + } else if (strcmp(resp->name, "vdd2_opp") == 0) { +- /* Not supported yet */ ++ tput_db = resp->resource_data; ++ tput = target_level; ++ /* using the throughput db map to the appropriate L3 Freq */ ++ for (ind = 1; ind < MAX_VDD2_OPP; ind++) ++ if (tput_db->throughput[ind] > tput) ++ target_level = ind; ++ ++ /* Set the highest OPP possible */ ++ if (ind == MAX_VDD2_OPP) ++ target_level = ind-1; ++ ++ if (resp->curr_level == target_level) ++ return 0; ++ ++ resp->curr_level = target_level; ++ ++ l3_freq = get_freq(vdd2_rate_table + MAX_VDD2_OPP, ++ target_level); ++ if (resp->curr_level > target_level) { ++ /* Scale Frequency and then voltage */ ++ clk_set_rate(vdd2_clk, l3_freq); ++ sr_voltagescale_vcbypass(PRCM_VDD2, ++ vdd2_volts[target_level-1]); ++ } else { ++ /* Scale Voltage and then frequency */ ++ sr_voltagescale_vcbypass(PRCM_VDD2, ++ vdd2_volts[target_level-1]); ++ clk_set_rate(vdd1_clk, l3_freq); ++ } ++ resp->curr_level = curr_vdd2_prcm_set->opp; + } + #endif + return 0; +Index: linux-omap-2.6/arch/arm/plat-omap/omap-pm-srf.c +=================================================================== +--- linux-omap-2.6.orig/arch/arm/plat-omap/omap-pm-srf.c 2008-07-21 +12:10:21.626540178 +0530 ++++ linux-omap-2.6/arch/arm/plat-omap/omap-pm-srf.c 2008-07-21 +12:10:22.479513287 +0530 +@@ -95,21 +95,16 @@ void omap_pm_set_min_bus_tput(struct dev + return; + }; + +- if (r == 0) ++ if (r == 0) { + pr_debug("OMAP PM: remove min bus tput constraint: " + "dev %s for agent_id %d\n", dev_name(dev), agent_id); +- else ++ resource_release("vdd2_opp", r); ++ } else { + pr_debug("OMAP PM: add min bus tput constraint: " + "dev %s for agent_id %d: rate %ld KiB\n", + dev_name(dev), agent_id, r); +- +- /* +- * This code should model the interconnect and compute the +- * required clock frequency, convert that to a VDD2 OPP ID, then +- * set the VDD2 OPP appropriately. +- * +- * TI CDP code can call constraint_set here on the VDD2 OPP. +- */ ++ resource_request("vdd2_opp", dev, r); ++ } + } + + void omap_pm_set_max_dev_wakeup_lat(struct device *dev, long t) + + +-- +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 |