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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2012-08-08 00:29:16 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-09-04 01:44:59 +0200 |
| commit | b42879e2e9b130e9ea0df3f076a0742df46e143a (patch) | |
| tree | f42037c60bcf561e42223b0d9ad19b0770b36aa0 /arch | |
| parent | c37b7a7b3454ea6e6b457ab458c694fe4d81cf9e (diff) | |
| download | linux-b42879e2e9b130e9ea0df3f076a0742df46e143a.tar.gz linux-b42879e2e9b130e9ea0df3f076a0742df46e143a.tar.bz2 linux-b42879e2e9b130e9ea0df3f076a0742df46e143a.zip | |
ARM: shmobile: Specify device latencies for Mackerel 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 the Mackerel board 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 Mackerel, 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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-shmobile/board-mackerel.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c index 954b02e3bb18..c64fc40351da 100644 --- a/arch/arm/mach-shmobile/board-mackerel.c +++ b/arch/arm/mach-shmobile/board-mackerel.c @@ -1407,8 +1407,15 @@ static struct i2c_board_info i2c1_devices[] = { #define GPIO_PORT168CR 0xE60520A8 #define SRCR4 0xe61580bc #define USCCR1 0xE6058144 +#define DEV_LATENCY_NS 250000 static void __init mackerel_init(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, + }; u32 srcr4; struct clk *clk; @@ -1623,20 +1630,20 @@ static void __init mackerel_init(void) platform_add_devices(mackerel_devices, ARRAY_SIZE(mackerel_devices)); - rmobile_add_device_to_domain("A4LC", &lcdc_device); - rmobile_add_device_to_domain("A4LC", &hdmi_lcdc_device); - rmobile_add_device_to_domain("A4LC", &meram_device); - rmobile_add_device_to_domain("A4MP", &fsi_device); - rmobile_add_device_to_domain("A3SP", &usbhs0_device); - rmobile_add_device_to_domain("A3SP", &usbhs1_device); - rmobile_add_device_to_domain("A3SP", &nand_flash_device); - rmobile_add_device_to_domain("A3SP", &sh_mmcif_device); - rmobile_add_device_to_domain("A3SP", &sdhi0_device); + rmobile_add_device_to_domain_td("A4LC", &lcdc_device, &latencies); + rmobile_add_device_to_domain_td("A4LC", &hdmi_lcdc_device, &latencies); + rmobile_add_device_to_domain_td("A4LC", &meram_device, &latencies); + rmobile_add_device_to_domain_td("A4MP", &fsi_device, &latencies); + rmobile_add_device_to_domain_td("A3SP", &usbhs0_device, &latencies); + rmobile_add_device_to_domain_td("A3SP", &usbhs1_device, &latencies); + rmobile_add_device_to_domain_td("A3SP", &nand_flash_device, &latencies); + rmobile_add_device_to_domain_td("A3SP", &sh_mmcif_device, &latencies); + rmobile_add_device_to_domain_td("A3SP", &sdhi0_device, &latencies); #if !defined(CONFIG_MMC_SH_MMCIF) && !defined(CONFIG_MMC_SH_MMCIF_MODULE) - rmobile_add_device_to_domain("A3SP", &sdhi1_device); + rmobile_add_device_to_domain_td("A3SP", &sdhi1_device, &latencies); #endif - rmobile_add_device_to_domain("A3SP", &sdhi2_device); - rmobile_add_device_to_domain("A4R", &ceu_device); + rmobile_add_device_to_domain_td("A3SP", &sdhi2_device, &latencies); + rmobile_add_device_to_domain_td("A4R", &ceu_device, &latencies); hdmi_init_pm_clock(); sh7372_pm_init(); |