On OMAP2+ devices, standardize and clean up WFI entry and WFI blocking.

Basic test logs are available here:
 
    http://www.pwsan.com/omap/testlogs/wfi_devel_a_3.9/20130208085027/
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Merge tag 'omap-devel-b-for-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v3.9/pm-wfi-take2

On OMAP2+ devices, standardize and clean up WFI entry and WFI blocking.

Basic test logs are available here:

   http://www.pwsan.com/omap/testlogs/wfi_devel_a_3.9/20130208085027/

Conflicts:
	arch/arm/mach-omap2/pm24xx.c
This commit is contained in:
Tony Lindgren 2013-02-11 09:20:50 -08:00
Родитель 8d61d7f945 814a18a5d0
Коммит 58a656b77a
3 изменённых файлов: 12 добавлений и 26 удалений

Просмотреть файл

@ -3493,7 +3493,12 @@ static struct omap_hwmod am35xx_emac_hwmod = {
.name = "davinci_emac", .name = "davinci_emac",
.mpu_irqs = am35xx_emac_mpu_irqs, .mpu_irqs = am35xx_emac_mpu_irqs,
.class = &am35xx_emac_class, .class = &am35xx_emac_class,
.flags = HWMOD_NO_IDLEST, /*
* According to Mark Greer, the MPU will not return from WFI
* when the EMAC signals an interrupt.
* http://www.spinics.net/lists/arm-kernel/msg174734.html
*/
.flags = (HWMOD_NO_IDLEST | HWMOD_BLOCK_WFI),
}; };
/* l3_core -> davinci emac interface */ /* l3_core -> davinci emac interface */

Просмотреть файл

@ -54,7 +54,6 @@
#include "powerdomain.h" #include "powerdomain.h"
#include "clockdomain.h" #include "clockdomain.h"
static void (*omap2_sram_idle)(void);
static void (*omap2_sram_suspend)(u32 dllctrl, void __iomem *sdrc_dlla_ctrl, static void (*omap2_sram_suspend)(u32 dllctrl, void __iomem *sdrc_dlla_ctrl,
void __iomem *sdrc_power); void __iomem *sdrc_power);
@ -163,6 +162,8 @@ static int omap2_allow_mpu_retention(void)
static void omap2_enter_mpu_retention(void) static void omap2_enter_mpu_retention(void)
{ {
const int zero = 0;
/* The peripherals seem not to be able to wake up the MPU when /* The peripherals seem not to be able to wake up the MPU when
* it is in retention mode. */ * it is in retention mode. */
if (omap2_allow_mpu_retention()) { if (omap2_allow_mpu_retention()) {
@ -179,7 +180,8 @@ static void omap2_enter_mpu_retention(void)
pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_ON); pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_ON);
} }
omap2_sram_idle(); /* WFI */
asm("mcr p15, 0, %0, c7, c0, 4" : : "r" (zero) : "memory", "cc");
pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_ON); pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_ON);
} }
@ -333,11 +335,9 @@ int __init omap2_pm_init(void)
/* /*
* We copy the assembler sleep/wakeup routines to SRAM. * We copy the assembler sleep/wakeup routines to SRAM.
* These routines need to be in SRAM as that's the only * These routines need to be in SRAM as that's the only
* memory the MPU can see when it wakes up. * memory the MPU can see when it wakes up after the entire
* chip enters idle.
*/ */
omap2_sram_idle = omap_sram_push(omap24xx_idle_loop_suspend,
omap24xx_idle_loop_suspend_sz);
omap2_sram_suspend = omap_sram_push(omap24xx_cpu_suspend, omap2_sram_suspend = omap_sram_push(omap24xx_cpu_suspend,
omap24xx_cpu_suspend_sz); omap24xx_cpu_suspend_sz);

Просмотреть файл

@ -36,25 +36,6 @@
.text .text
/*
* Forces OMAP into idle state
*
* omap24xx_idle_loop_suspend() - This bit of code just executes the WFI
* for normal idles.
*
* Note: This code get's copied to internal SRAM at boot. When the OMAP
* wakes up it continues execution at the point it went to sleep.
*/
.align 3
ENTRY(omap24xx_idle_loop_suspend)
stmfd sp!, {r0, lr} @ save registers on stack
mov r0, #0 @ clear for mcr setup
mcr p15, 0, r0, c7, c0, 4 @ wait for interrupt
ldmfd sp!, {r0, pc} @ restore regs and return
ENTRY(omap24xx_idle_loop_suspend_sz)
.word . - omap24xx_idle_loop_suspend
/* /*
* omap24xx_cpu_suspend() - Forces OMAP into deep sleep state by completing * omap24xx_cpu_suspend() - Forces OMAP into deep sleep state by completing
* SDRC shutdown then ARM shutdown. Upon wake MPU is back on so just restore * SDRC shutdown then ARM shutdown. Upon wake MPU is back on so just restore