ARM: shmobile: Specify device latencies for SH7372 devices directly

The results of adaptive latency computations in
GENPD_DEV_TIMED_CALLBACK() show that the start/stop and save/restore
state latencies of all devices on SH7372 I have tried are a little
below 250 us.  Therefore, if the 250 us is used as the common initial
value of the latency fields in struct gpd_timing_data for all devices
on SH7372, the latency values will never have to change at run time
and there won't be any overhead related to re-computation of the
corresponding PM QoS data.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>

diff --git a/arch/arm/mach-shmobile/setup-sh7372.c b/arch/arm/mach-shmobile/setup-sh7372.c
index c1f698f2b4699962a56110774e36098916ad0c0f..5bcde8a79c53641911b637a0ca885d91b12cbd1f 100644 (file)
--- a/arch/arm/mach-shmobile/setup-sh7372.c
+++ b/arch/arm/mach-shmobile/setup-sh7372.c
@@ -999,8 +999,17 @@ static struct platform_device *sh7372_late_devices[] __initdata = {
        &spu1_device,
 };
 
+#define DEV_LATENCY_NS 250000
+
 void __init sh7372_add_standard_devices(void)
 {
+       struct gpd_timing_data latencies = {
+               .stop_latency_ns = DEV_LATENCY_NS,
+               .start_latency_ns = DEV_LATENCY_NS,
+               .save_state_latency_ns = DEV_LATENCY_NS,
+               .restore_state_latency_ns = DEV_LATENCY_NS,
+       };
+
        sh7372_init_pm_domains();
 
        platform_add_devices(sh7372_early_devices,
@@ -1009,30 +1018,30 @@ void __init sh7372_add_standard_devices(void)
        platform_add_devices(sh7372_late_devices,
                            ARRAY_SIZE(sh7372_late_devices));
 
-       rmobile_add_device_to_domain("A3RV", &vpu_device);
-       rmobile_add_device_to_domain("A4MP", &spu0_device);
-       rmobile_add_device_to_domain("A4MP", &spu1_device);
-       rmobile_add_device_to_domain("A3SP", &scif0_device);
-       rmobile_add_device_to_domain("A3SP", &scif1_device);
-       rmobile_add_device_to_domain("A3SP", &scif2_device);
-       rmobile_add_device_to_domain("A3SP", &scif3_device);
-       rmobile_add_device_to_domain("A3SP", &scif4_device);
-       rmobile_add_device_to_domain("A3SP", &scif5_device);
-       rmobile_add_device_to_domain("A3SP", &scif6_device);
-       rmobile_add_device_to_domain("A3SP", &iic1_device);
-       rmobile_add_device_to_domain("A3SP", &dma0_device);
-       rmobile_add_device_to_domain("A3SP", &dma1_device);
-       rmobile_add_device_to_domain("A3SP", &dma2_device);
-       rmobile_add_device_to_domain("A3SP", &usb_dma0_device);
-       rmobile_add_device_to_domain("A3SP", &usb_dma1_device);
-       rmobile_add_device_to_domain("A4R", &iic0_device);
-       rmobile_add_device_to_domain("A4R", &veu0_device);
-       rmobile_add_device_to_domain("A4R", &veu1_device);
-       rmobile_add_device_to_domain("A4R", &veu2_device);
-       rmobile_add_device_to_domain("A4R", &veu3_device);
-       rmobile_add_device_to_domain("A4R", &jpu_device);
-       rmobile_add_device_to_domain("A4R", &tmu00_device);
-       rmobile_add_device_to_domain("A4R", &tmu01_device);
+       rmobile_add_device_to_domain_td("A3RV", &vpu_device, &latencies);
+       rmobile_add_device_to_domain_td("A4MP", &spu0_device, &latencies);
+       rmobile_add_device_to_domain_td("A4MP", &spu1_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &scif0_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &scif1_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &scif2_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &scif3_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &scif4_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &scif5_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &scif6_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &iic1_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &dma0_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &dma1_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &dma2_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &usb_dma0_device, &latencies);
+       rmobile_add_device_to_domain_td("A3SP", &usb_dma1_device, &latencies);
+       rmobile_add_device_to_domain_td("A4R", &iic0_device, &latencies);
+       rmobile_add_device_to_domain_td("A4R", &veu0_device, &latencies);
+       rmobile_add_device_to_domain_td("A4R", &veu1_device, &latencies);
+       rmobile_add_device_to_domain_td("A4R", &veu2_device, &latencies);
+       rmobile_add_device_to_domain_td("A4R", &veu3_device, &latencies);
+       rmobile_add_device_to_domain_td("A4R", &jpu_device, &latencies);
+       rmobile_add_device_to_domain_td("A4R", &tmu00_device, &latencies);
+       rmobile_add_device_to_domain_td("A4R", &tmu01_device, &latencies);
 }
 
 static void __init sh7372_earlytimer_init(void)