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ARM: at91: pm: Use ULP0 naming instead of slow clock

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Switch to use ULP0 naming instead of slow clock naming for power modes, to
be as closed as possible to datasheet. This commit does the necessary
renaming and macro addition to be as close as possible to the namings
from [1].

[1] https://lore.kernel.org/lkml/1470650705-31418-3-git-send-email-wenyou.yang@atmel.com

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Claudiu Beznea 2018-07-17 11:26:54 +03:00 committed by Alexandre Belloni
parent 1e1d5b6939
commit 514e2a294a
3 changed files with 17 additions and 16 deletions
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18
arch/arm/mach-at91/pm.c
View File

@ -40,15 +40,15 @@ extern void at91_pinctrl_gpio_resume(void);
#endif
static const match_table_t pm_modes __initconst = {
{ 0, "standby" },
{ AT91_PM_SLOW_CLOCK, "ulp0" },
{ AT91_PM_STANDBY, "standby" },
{ AT91_PM_ULP0, "ulp0" },
{ AT91_PM_BACKUP, "backup" },
{ -1, NULL },
};
static struct at91_pm_data pm_data = {
.standby_mode = 0,
.suspend_mode = AT91_PM_SLOW_CLOCK,
.standby_mode = AT91_PM_STANDBY,
.suspend_mode = AT91_PM_ULP0,
};
#define at91_ramc_read(id, field) \
@ -145,7 +145,7 @@ static int at91_pm_verify_clocks(void)
*/
int at91_suspend_entering_slow_clock(void)
{
return (pm_data.mode >= AT91_PM_SLOW_CLOCK);
return (pm_data.mode >= AT91_PM_ULP0);
}
EXPORT_SYMBOL(at91_suspend_entering_slow_clock);
@ -186,7 +186,7 @@ static void at91_pm_suspend(suspend_state_t state)
* event sources; and reduces DRAM power. But otherwise it's identical to
* PM_SUSPEND_ON: cpu idle, and nothing fancy done with main or cpu clocks.
*
* AT91_PM_SLOW_CLOCK is like STANDBY plus slow clock mode, so drivers must
* AT91_PM_ULP0 is like STANDBY plus slow clock mode, so drivers must
* suspend more deeply, the master clock switches to the clk32k and turns off
* the main oscillator
*
@ -204,7 +204,7 @@ static int at91_pm_enter(suspend_state_t state)
/*
* Ensure that clocks are in a valid state.
*/
if ((pm_data.mode >= AT91_PM_SLOW_CLOCK) &&
if (pm_data.mode >= AT91_PM_ULP0 &&
!at91_pm_verify_clocks())
goto error;
@ -546,9 +546,9 @@ securam_fail:
pm_data.sfrbu = NULL;
if (pm_data.standby_mode == AT91_PM_BACKUP)
pm_data.standby_mode = AT91_PM_SLOW_CLOCK;
pm_data.standby_mode = AT91_PM_ULP0;
if (pm_data.suspend_mode == AT91_PM_BACKUP)
pm_data.suspend_mode = AT91_PM_SLOW_CLOCK;
pm_data.suspend_mode = AT91_PM_ULP0;
}
struct pmc_info {

3
arch/arm/mach-at91/pm.h
View File

@ -21,7 +21,8 @@
#define AT91_MEMCTRL_SDRAMC 1
#define AT91_MEMCTRL_DDRSDR 2
#define AT91_PM_SLOW_CLOCK 0x01
#define AT91_PM_STANDBY 0x00
#define AT91_PM_ULP0 0x01
#define AT91_PM_BACKUP 0x02
#ifndef __ASSEMBLY__

12
arch/arm/mach-at91/pm_suspend.S
View File

@ -112,8 +112,8 @@ ENTRY(at91_pm_suspend_in_sram)
bl at91_sramc_self_refresh
ldr r0, .pm_mode
cmp r0, #AT91_PM_SLOW_CLOCK
beq slow_clock
cmp r0, #AT91_PM_ULP0
beq ulp0_mode
cmp r0, #AT91_PM_BACKUP
beq backup_mode
@ -122,8 +122,8 @@ ENTRY(at91_pm_suspend_in_sram)
at91_cpu_idle
b exit_suspend
slow_clock:
bl at91_slowck_mode
ulp0_mode:
bl at91_ulp0_mode
b exit_suspend
backup_mode:
bl at91_backup_mode
@ -151,7 +151,7 @@ ENTRY(at91_backup_mode)
str tmp1, [r0, #0]
ENDPROC(at91_backup_mode)
ENTRY(at91_slowck_mode)
ENTRY(at91_ulp0_mode)
ldr pmc, .pmc_base
/* Save Master clock setting */
@ -212,7 +212,7 @@ ENTRY(at91_slowck_mode)
wait_mckrdy
mov pc, lr
ENDPROC(at91_slowck_mode)
ENDPROC(at91_ulp0_mode)
/*
* void at91_sramc_self_refresh(unsigned int is_active)