linux-kernel - Re: [PATCH v1 1/4] ARM: tegra: Fix missed EMC registers latching on resume from LP1 on Tegra30+

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Date:   Mon, 19 Nov 2018 21:51:26 +0000
From:   Jon Hunter <jonathanh@...dia.com>
To:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>
CC:     <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/4] ARM: tegra: Fix missed EMC registers latching on
 resume from LP1 on Tegra30+


On 19/11/2018 21:27, Jon Hunter wrote:
> 
> On 30/08/2018 19:54, Dmitry Osipenko wrote:
>> The memory interface configuration and re-calibration interval are left
>> unassigned on resume from LP1 because these registers are shadowed and
>> require latching after being adjusted.
>>
>> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
>> ---
>>  arch/arm/mach-tegra/sleep-tegra30.S | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S
>> index 127fc78365fe..801fe58978ae 100644
>> --- a/arch/arm/mach-tegra/sleep-tegra30.S
>> +++ b/arch/arm/mach-tegra/sleep-tegra30.S
>> @@ -521,6 +521,8 @@ zcal_done:
>>  	ldr	r1, [r5, #0x0]		@ restore EMC_CFG
>>  	str	r1, [r0, #EMC_CFG]
>>  
>> +	emc_timing_update r1, r0
>> +
>>  	/* Tegra114 had dual EMC channel, now config the other one */
>>  	cmp	r10, #TEGRA114
>>  	bne	__no_dual_emc_chanl
>>
> 
> This is stated in the TRM as what needs to be done. So ...
> 
> Reviewed-by: Jon Hunter <jonathanh@...dia.com>

Also ...

Tested-by: Jon Hunter <jonathanh@...dia.com>

Jon

-- 
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