diff options
| author | Nicolas Ferre <nicolas.ferre@microchip.com> | 2025-08-27 16:54:27 +0200 |
|---|---|---|
| committer | Claudiu Beznea <claudiu.beznea@tuxon.dev> | 2025-08-30 11:38:55 +0300 |
| commit | 3cae7d18392feacf04354feac994c1b48eed91af (patch) | |
| tree | f1d7eadba6f3e07a49a2ec5c1a96ccecc76bc51c | |
| parent | 296302d3d81360e09fa956e9be9edc8223b69a12 (diff) | |
ARM: at91: pm: save and restore ACR during PLL disable/enable
Add a new word in assembly to store ACR value during the calls
to at91_plla_disable/at91_plla_enable macros and use it.
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
[cristian.birsan@microchip.com: remove ACR_DEFAULT_PLLA loading]
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Link: https://lore.kernel.org/r/20250827145427.46819-4-nicolas.ferre@microchip.com
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
| -rw-r--r-- | arch/arm/mach-at91/pm_suspend.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S index 7e6c94f8edee..aad53ec9e957 100644 --- a/arch/arm/mach-at91/pm_suspend.S +++ b/arch/arm/mach-at91/pm_suspend.S @@ -689,6 +689,10 @@ sr_dis_exit: bic tmp2, tmp2, #AT91_PMC_PLL_UPDT_ID str tmp2, [pmc, #AT91_PMC_PLL_UPDT] + /* save acr */ + ldr tmp2, [pmc, #AT91_PMC_PLL_ACR] + str tmp2, .saved_acr + /* save div. */ mov tmp1, #0 ldr tmp2, [pmc, #AT91_PMC_PLL_CTRL0] @@ -758,7 +762,7 @@ sr_dis_exit: str tmp1, [pmc, #AT91_PMC_PLL_UPDT] /* step 2. */ - ldr tmp1, =AT91_PMC_PLL_ACR_DEFAULT_PLLA + ldr tmp1, .saved_acr str tmp1, [pmc, #AT91_PMC_PLL_ACR] /* step 3. */ @@ -1207,6 +1211,8 @@ ENDPROC(at91_pm_suspend_in_sram) #endif .saved_mckr: .word 0 +.saved_acr: + .word 0 .saved_pllar: .word 0 .saved_sam9_lpr: |