From: Prasad Sodagudi <quic_psodagud@quicinc.com>
To: Konrad Dybcio <konrad.dybcio@linaro.org>,
Eric Chanudet <echanude@redhat.com>,
Andy Gross <agross@kernel.org>,
Bjorn Andersson <andersson@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: <linux-arm-msm@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: sa8775p: add symbols to dtb
Date: Mon, 13 Mar 2023 21:48:39 -0700 [thread overview]
Message-ID: <1bd61fa7-cd0e-e198-9cee-7485eacbe685@quicinc.com> (raw)
In-Reply-To: <43c11038-91d5-cbfd-7349-06fcd61a0661@linaro.org>
On 3/9/2023 3:47 PM, Konrad Dybcio wrote:
>
>
> On 10.03.2023 00:39, Eric Chanudet wrote:
>> ABL uses the __symbols__ section to process the DTB before passing it
>> forward. Without it, the bootstrap is interrupted.
>>
>> Signed-off-by: Eric Chanudet <echanude@redhat.com>
>> ---
> Fix your ABL.
Hi Konrad,
Apps boot-loader need __symbols__ for dynamic overlay operation.
Qualcomm firmware passes an overlay file to apps boot-loader to overlay
some of the nodes based on firmware configuration. Without __symbols__
apps boot-loader is not able to overlay.
Qualcomm hypervisor/gunyah would like to overlay arch timer node with
always-on property, So adding __symbols__ helps boot-loader to overlay.
I think, commit text is misleading here and I will request Eric to fix
the commit text.
-Thanks, Prasad
>
> Konrad
>> Depends on initial sa8775p-ride.dts:
>> https://lore.kernel.org/all/20230214092713.211054-3-brgl@bgdev.pl/
>>
>> arch/arm64/boot/dts/qcom/Makefile | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
>> index b63cd1861e68..72e85ab31d74 100644
>> --- a/arch/arm64/boot/dts/qcom/Makefile
>> +++ b/arch/arm64/boot/dts/qcom/Makefile
>> @@ -1,4 +1,8 @@
>> # SPDX-License-Identifier: GPL-2.0
>> +
>> +# Enable support for device-tree overlays required on sa8775p-ride.
>> +DTC_FLAGS_sa8775p-ride := -@
>> +
>> dtb-$(CONFIG_ARCH_QCOM) += apq8016-sbc.dtb
>> dtb-$(CONFIG_ARCH_QCOM) += apq8094-sony-xperia-kitakami-karin_windy.dtb
>> dtb-$(CONFIG_ARCH_QCOM) += apq8096-db820c.dtb
>
>
next prev parent reply other threads:[~2023-03-14 4:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-09 23:39 [PATCH] arm64: dts: qcom: sa8775p: add symbols to dtb Eric Chanudet
2023-03-09 23:47 ` Konrad Dybcio
2023-03-14 4:48 ` Prasad Sodagudi [this message]
2023-03-14 9:59 ` Konrad Dybcio
2023-03-16 6:55 ` Krzysztof Kozlowski
2023-03-13 12:49 ` Bjorn Andersson
2023-03-14 15:14 ` Rob Herring
2023-03-22 2:55 ` Bjorn Andersson
2023-03-24 17:19 ` Eric Chanudet
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