The CPUidle C state latencies and thresholds are dependent
on various board specific details.
This patch makes it possible to configure these values from the
respective board files.
omap3_pm_init_cpuidle() can now be optionally called from board
files to pass board specific cpuidle parameters.
If the board files do not use this function to pass the params
default values are used which might cause higher consumption
dur to wrong state selection by the governor.
This patch only updates the 3430sdp board files to use
omap3_pm_init_cpuidle().
Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
---
arch/arm/mach-omap2/board-3430sdp.c | 19 +++++++++++++++
arch/arm/mach-omap2/cpuidle34xx.c | 42 +++++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/pm.h | 8 ++++++
3 files changed, 69 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-3430sdp.c b/arch/arm/mach-omap2/board-3430sdp.c
index 0f1975c..d2b2f8f 100644
--- a/arch/arm/mach-omap2/board-3430sdp.c
+++ b/arch/arm/mach-omap2/board-3430sdp.c
@@ -73,6 +73,24 @@ static struct prm_setup_vc omap3_setuptime_table = {
.vdd1_off = 0x00,
};
+/* FIXME: These values need to be updated based on more profiling on 3430sdp*/
+static struct cpuidle_params omap3_cpuidle_params_table[] = {
+ /* C1 */
+ {2, 2, 5},
+ /* C2 */
+ {10, 10, 30},
+ /* C3 */
+ {50, 50, 300},
+ /* C4 */
+ {1500, 1800, 4000},
+ /* C5 */
+ {2500, 7500, 12000},
+ /* C6 */
+ {3000, 8500, 15000},
+ /* C7 */
+ {10000, 30000, 300000},
+};
+
static int board_keymap[] = {
KEY(0, 0, KEY_LEFT),
KEY(0, 1, KEY_RIGHT),
@@ -203,6 +221,7 @@ static void __init omap_3430sdp_init_irq(void)
omap_board_config = sdp3430_config;
omap_board_config_size = ARRAY_SIZE(sdp3430_config);
omap3_pm_init_vc(&omap3_setuptime_table);
+ omap3_pm_init_cpuidle(omap3_cpuidle_params_table);
omap2_init_common_hw(hyb18m512160af6_sdrc_params, NULL, omap3_mpu_rate_table,
omap3_dsp_rate_table, omap3_l3_rate_table);
omap_init_irq();
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index c44a942..f5d8f55 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -60,6 +60,30 @@ struct omap3_processor_cx omap3_power_states[OMAP3_MAX_STATES];
struct omap3_processor_cx current_cx_state;
struct powerdomain *mpu_pd, *core_pd, *per_pd;
+/*
+ * The latencies/thresholds for various C states have
+ * to be configured from the respective board files.
+ * These are some default values (which might not provide
+ * the best power savings) used on boards which do not
+ * pass these details from the board file.
+ */
+static struct cpuidle_params cpuidle_params_table[] = {
+ /* C1 */
+ {2, 2, 5},
+ /* C2 */
+ {10, 10, 30},
+ /* C3 */
+ {50, 50, 300},
+ /* C4 */
+ {1500, 1800, 4000},
+ /* C5 */
+ {2500, 7500, 12000},
+ /* C6 */
+ {3000, 8500, 15000},
+ /* C7 */
+ {10000, 30000, 300000},
+};
+
static int omap3_idle_bm_check(void)
{
if (!omap3_can_sleep())
@@ -165,6 +189,24 @@ static int omap3_enter_idle_bm(struct cpuidle_device *dev,
DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev);
+void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params)
+{
+ int i;
+
+ if (!cpuidle_board_params)
+ return;
+
+ for (i = OMAP3_STATE_C1; i < OMAP3_MAX_STATES; i++) {
+ cpuidle_params_table[i].sleep_latency =
+ cpuidle_board_params[i].sleep_latency;
+ cpuidle_params_table[i].wake_latency =
+ cpuidle_board_params[i].wake_latency;
+ cpuidle_params_table[i].threshold =
+ cpuidle_board_params[i].threshold;
+ }
+ return;
+}
+
/* omap3_init_power_states - Initialises the OMAP3 specific C states.
*
* Below is the desciption of each C state.
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index ca673c5..0b814ab 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -41,7 +41,15 @@ struct prm_setup_vc {
u16 vdd1_ret;
u16 vdd1_off;
};
+
+struct cpuidle_params {
+ u32 sleep_latency;
+ u32 wake_latency;
+ u32 threshold;
+};
+
extern void omap3_pm_init_vc(struct prm_setup_vc *setup_vc);
+extern void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params);
extern int resource_set_opp_level(int res, u32 target_level, int flags);
extern int resource_access_opp_lock(int res, int delta);
--
1.5.4.7
--
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