diff options
| author |   Claudiu Beznea <claudiu.beznea@microchip.com> | 2019-02-14 15:55:06 +0000 |
|---|---|---|
| committer |   Ludovic Desroches <ludovic.desroches@microchip.com> | 2019-03-28 11:05:53 +0100 |
| commit | 2725d70aa5138284ba2cebf0ef51dd23e0c9ea21 (patch) | |
| tree | aba90a9ed8dee88ca94f61dc92a521ef89f6aa83 | |
| parent | ARM: at91: pm: disable RC oscillator in ULP0 (diff) | |
| download | linux-dev-2725d70aa5138284ba2cebf0ef51dd23e0c9ea21.tar.xz linux-dev-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>
| -rw-r--r-- | arch/arm/mach-at91/pm_suspend.S | 31 |
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: |