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authorClaudiu Beznea <claudiu.beznea@microchip.com>2019-02-14 16:55:06 +0100
committerLudovic Desroches <ludovic.desroches@microchip.com>2019-03-28 11:05:53 +0100
commit2725d70aa5138284ba2cebf0ef51dd23e0c9ea21 (patch)
treeaba90a9ed8dee88ca94f61dc92a521ef89f6aa83 /arch/arm/mach-at91
parentARM: at91: pm: disable RC oscillator in ULP0 (diff)
downloadlinux-2725d70aa5138284ba2cebf0ef51dd23e0c9ea21.tar.xz
linux-2725d70aa5138284ba2cebf0ef51dd23e0c9ea21.zip
ARM: at91: pm: do not disable/enable PLLA for ULP modes
There is no need to disable/enable PLLA when switching to one of the ULP modes. The PLLA consumers should take care of this. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Diffstat (limited to 'arch/arm/mach-at91')
-rw-r--r--arch/arm/mach-at91/pm_suspend.S31
1 files changed, 0 insertions, 31 deletions
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 5c33023f9129..77e29309cc6e 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -51,15 +51,6 @@ tmp2 .req r5
.endm
/*
- * Wait until PLLA has locked.
- */
- .macro wait_pllalock
-1: ldr tmp1, [pmc, #AT91_PMC_SR]
- tst tmp1, #AT91_PMC_LOCKA
- beq 1b
- .endm
-
-/*
* Put the processor to enter the idle state
*/
.macro at91_cpu_idle
@@ -351,14 +342,6 @@ ENTRY(at91_ulp_mode)
wait_mckrdy
- /* Save PLLA setting and disable it */
- ldr tmp1, [pmc, #AT91_CKGR_PLLAR]
- str tmp1, .saved_pllar
-
- mov tmp1, #AT91_PMC_PLLCOUNT
- orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
- str tmp1, [pmc, #AT91_CKGR_PLLAR]
-
ldr r0, .pm_mode
cmp r0, #AT91_PM_ULP1
beq ulp1_mode
@@ -373,18 +356,6 @@ ulp1_mode:
ulp_exit:
ldr pmc, .pmc_base
- /* Restore PLLA setting */
- ldr tmp1, .saved_pllar
- str tmp1, [pmc, #AT91_CKGR_PLLAR]
-
- tst tmp1, #(AT91_PMC_MUL & 0xff0000)
- bne 3f
- tst tmp1, #(AT91_PMC_MUL & ~0xff0000)
- beq 4f
-3:
- wait_pllalock
-4:
-
/*
* Restore master clock setting
*/
@@ -537,8 +508,6 @@ ENDPROC(at91_sramc_self_refresh)
.word 0
.saved_mckr:
.word 0
-.saved_pllar:
- .word 0
.saved_sam9_lpr:
.word 0
.saved_sam9_lpr1: