===================================================================
@@ -999,8 +999,17 @@ static struct platform_device *sh7372_la
&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(
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)
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> --- arch/arm/mach-shmobile/setup-sh7372.c | 57 +++++++++++++++++++--------------- 1 file changed, 33 insertions(+), 24 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html