linux-kernel - Re: [PATCH v2] arm64: dts: ti: k3-am642-evm-pcie0-ep: Add boot phase tag to "pcie0

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Message-ID: <b24a97fc-8dac-443b-aec7-317b9e393f2d@ti.com>
Date: Wed, 11 Jun 2025 14:17:49 +0530
From: Hrushikesh Salunke <h-salunke@...com>
To: Vignesh Raghavendra <vigneshr@...com>, <nm@...com>, <kristo@...nel.org>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>
CC: <s-vadapalli@...com>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <danishanwar@...com>, Hrushikesh Salunke <h-salunke@...com>
Subject: Re: [PATCH v2] arm64: dts: ti: k3-am642-evm-pcie0-ep: Add boot phase
 tag to "pcie0_ep"



On 11/06/25 14:14, Vignesh Raghavendra wrote:
> 
> 
> On 10/06/25 11:19, Hrushikesh Salunke wrote:
>> AM64X SoC has one instance of PCIe which is PCIe0. To support PCIe boot
>> on AM64X SoC, PCIe0 needs to be in endpoint mode and it needs to be
>> functional at all stages of PCIe boot process. Thus add the
>> "bootph-all" boot phase tag to "pcie0_ep" device tree node.
>>
>> Signed-off-by: Hrushikesh Salunke <h-salunke@...com>
>> ---
>> This patch is based on commit
>> 475c850a7fdd Add linux-next specific files for 20250606
>>
>> Changes since v1
>> As per feedback from Nishanth, changed the position of "bootph-all"
>> tag, according to ordering rules for device tree properties.
>>
>> v1 : https://lore.kernel.org/all/20250609115930.w2s6jzg7xii55dlu@speckled/
>>
>>   arch/arm64/boot/dts/ti/k3-am642-evm-pcie0-ep.dtso | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm-pcie0-ep.dtso b/arch/arm64/boot/dts/ti/k3-am642-evm-pcie0-ep.dtso
>> index 432751774853..a7e8d4ea98ac 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am642-evm-pcie0-ep.dtso
>> +++ b/arch/arm64/boot/dts/ti/k3-am642-evm-pcie0-ep.dtso
>> @@ -46,6 +46,7 @@ pcie0_ep: pcie-ep@...2000 {
>>   		max-functions = /bits/ 8 <1>;
>>   		phys = <&serdes0_pcie_link>;
>>   		phy-names = "pcie-phy";
>> +		bootph-all;
>>   		ti,syscon-pcie-ctrl = <&pcie0_ctrl 0x0>;
>>   	};
>>   };
> 
> Are the patches for PCIe boot support merged to U-Boot or such other
> bootloader repo?
> No, they are not in the U-Boot yet. I will be posting patches for PCIe
boot support for U-Boot this week.

Regards,
Hrushikesh