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ARM: at91/pm_slowclock: remove clocks which are already stopped when entering slow clock mode 

Assume USB PLL and PLL B are already stopped before entering sleep mode.

Removed PLL B from slow clock code, all drivers are supposed to properly
unprepare clocks.

Signed-off-by: Sylvain Rochet <sylvain.rochet@finsecur.com>
Acked-by: Wenyou.Yang <wenyou.yang@atmel.com>
[nicolas.ferre@atmel.com: remove the warning printed in pm.c]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Sylvain Rochet 2015-02-05 14:01:23 +08:00 committed by Nicolas Ferre
parent 09fc78a601
commit d18c570ef3
1 changed files with 0 additions and 31 deletions
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31
arch/arm/mach-at91/pm_slowclock.S
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@ -50,15 +50,6 @@ tmp2 .req r5
beq 1b beq 1b
.endm .endm
/*
* Wait until PLLB has locked.
*/
.macro wait_pllblock
1: ldr tmp1, [pmc, #AT91_PMC_SR]
tst tmp1, #AT91_PMC_LOCKB
beq 1b
.endm
.text .text
.arm .arm
@ -176,13 +167,6 @@ sdr_sr_done:
orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */ orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
str tmp1, [pmc, #AT91_CKGR_PLLAR] str tmp1, [pmc, #AT91_CKGR_PLLAR]
/* Save PLLB setting and disable it */
ldr tmp1, [pmc, #AT91_CKGR_PLLBR]
str tmp1, .saved_pllbr
mov tmp1, #AT91_PMC_PLLCOUNT
str tmp1, [pmc, #AT91_CKGR_PLLBR]
/* Turn off the main oscillator */ /* Turn off the main oscillator */
ldr tmp1, [pmc, #AT91_CKGR_MOR] ldr tmp1, [pmc, #AT91_CKGR_MOR]
bic tmp1, tmp1, #AT91_PMC_MOSCEN bic tmp1, tmp1, #AT91_PMC_MOSCEN
@ -200,18 +184,6 @@ sdr_sr_done:
wait_moscrdy wait_moscrdy
/* Restore PLLB setting */
ldr tmp1, .saved_pllbr
str tmp1, [pmc, #AT91_CKGR_PLLBR]
tst tmp1, #(AT91_PMC_MUL & 0xff0000)
bne 1f
tst tmp1, #(AT91_PMC_MUL & ~0xff0000)
beq 2f
1:
wait_pllblock
2:
/* Restore PLLA setting */ /* Restore PLLA setting */
ldr tmp1, .saved_pllar ldr tmp1, .saved_pllar
str tmp1, [pmc, #AT91_CKGR_PLLAR] str tmp1, [pmc, #AT91_CKGR_PLLAR]
@ -279,9 +251,6 @@ ram_restored:
.saved_pllar: .saved_pllar:
.word 0 .word 0
.saved_pllbr:
.word 0
.saved_sam9_lpr: .saved_sam9_lpr:
.word 0 .word 0