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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)
--
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