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Commit b42879e2 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

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: default avatarRafael J. Wysocki <rjw@sisk.pl>
Acked-by: default avatarMagnus Damm <damm@opensource.se>
parent c37b7a7b

arch/arm/mach-shmobile/board-mackerel.c

+19 −12
Original line number Diff line number Diff line
@@ -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();