From: sudeep.holla@arm•com (Sudeep Holla)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH RFT 1/2] drivers: bus: check cci device tree node status
Date: Wed, 10 Dec 2014 09:44:15 +0530 [thread overview]
Message-ID: <5487C897.9050405@arm.com> (raw)
In-Reply-To: <CAM4voakjWgnEXoXT1LH2ZFBy=U4vfXFXS1Su8VB7Cd3s3wqmSA@mail.gmail.com>
Hi Abhilash,
On Wednesday 10 December 2014 09:31 AM, Abhilash Kesavan wrote:
> Hi,
>
> On Fri, Nov 28, 2014 at 8:20 PM, Abhilash Kesavan <a.kesavan@samsung•com> wrote:
>> The arm-cci driver completes the probe sequence even if the cci node is
>> marked as disabled. Add a check in the driver to honour the cci status
>> in the device tree.
>>
>> Signed-off-by: Abhilash Kesavan <a.kesavan@samsung•com>
>
> This patch helps disable CCI on the Arndale Octa board thus resolving
> some imprecise aborts seen on that board. Kindly review.
>
> Regards,
> Abhilash
>> ---
>> drivers/bus/arm-cci.c | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
>> index 860da40..0ce5e2d 100644
>> --- a/drivers/bus/arm-cci.c
>> +++ b/drivers/bus/arm-cci.c
>> @@ -1312,6 +1312,9 @@ static int cci_probe(void)
>> if (!np)
>> return -ENODEV;
>>
>> + if (!of_device_is_available(np))
>> + return -ENODEV;
>> +
IIUC, by this change you are disabling the MCPM boot protocol here.
Is there any alternative boot protocol that works on this platform
to boot all 8 cores ? Sorry by quick grep couldn't find one, hence
so I am asking.
Regards,
Sudeep
next prev parent reply other threads:[~2014-12-10 4:14 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-28 14:50 [PATCH RFT 1/2] drivers: bus: check cci device tree node status Abhilash Kesavan
2014-11-28 14:50 ` [PATCH RFT 2/2] arm: dts: disable CCI on exynos420 based arndale-octa Abhilash Kesavan
2014-11-28 15:19 ` Krzysztof Kozlowski
2014-11-28 15:39 ` Abhilash Kesavan
2014-12-01 9:03 ` Krzysztof Kozlowski
2014-12-01 11:09 ` Russell King - ARM Linux
2014-12-01 11:19 ` Krzysztof Kozlowski
2014-12-01 18:50 ` Kevin Hilman
2014-12-01 19:52 ` Tyler Baker
2014-12-10 4:01 ` [PATCH RFT 1/2] drivers: bus: check cci device tree node status Abhilash Kesavan
2014-12-10 4:14 ` Sudeep Holla [this message]
2014-12-10 4:25 ` Abhilash Kesavan
2014-12-10 5:16 ` Sudeep Holla
2015-01-08 6:45 ` Sudeep Holla
2015-01-08 15:27 ` Abhilash Kesavan
2015-01-09 5:10 ` Sudeep Holla
2015-01-09 16:28 ` Abhilash Kesavan
2015-01-09 21:09 ` Kevin Hilman
2015-01-10 3:21 ` Abhilash Kesavan
2014-12-10 18:29 ` Nicolas Pitre
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