Messages in this thread | | | Subject | Re: [PATCH 3/3] ARM: at91: pm: fallback to slowclock when backup mode fails | From | "Yang, Wenyou" <> | Date | Fri, 28 Apr 2017 09:34:12 +0800 |
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On 2017/4/27 0:04, Alexandre Belloni wrote: > If the backup sram allocation fails, ensure we can suspend by falling back > to the usual slow clock mode. > > Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
> --- > arch/arm/mach-at91/pm.c | 12 +++++++++--- > 1 file changed, 9 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c > index d08f032f9d94..02823d8f3ada 100644 > --- a/arch/arm/mach-at91/pm.c > +++ b/arch/arm/mach-at91/pm.c > @@ -519,24 +519,30 @@ static void __init at91_pm_bu_sram_init(void) > > if (!pdev) { > pr_warn("%s: failed to find securam device!\n", __func__); > - return; > + goto fallback; > } > > sram_pool = gen_pool_get(&pdev->dev, NULL); > if (!sram_pool) { > pr_warn("%s: securam pool unavailable!\n", __func__); > - return; > + goto fallback; > } > > pm_bu = (void *)gen_pool_alloc(sram_pool, sizeof(struct at91_pm_bu)); > if (!pm_bu) { > pr_warn("%s: unable to alloc securam!\n", __func__); > - return; > + goto fallback; > } > > pm_bu->suspended = 0; > pm_bu->canary = virt_to_phys(&canary); > pm_bu->resume = virt_to_phys(cpu_resume); > + > +fallback: > + if (pm_data.standby_mode == AT91_PM_BACKUP) > + pm_data.standby_mode = AT91_PM_SLOW_CLOCK; > + if (pm_data.suspend_mode != AT91_PM_BACKUP) > + pm_data.suspend_mode = AT91_PM_SLOW_CLOCK; > } > > struct pmc_info { Best Regards, Wenyou Yang
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