linux-kernel - Re: [PATCH v7 3/7] dt-bindings: PCI: qcom,pcie-x1e80100: Add 'global' interrupt

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Message-ID: <a6yxt4o5alnu5oa5t4guvjq4x37xa6t664ae3palhmumztawlv@n3r3mnrnui2f>
Date: Thu, 17 Oct 2024 09:58:00 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Qiang Yu <quic_qianyu@...cinc.com>
Cc: manivannan.sadhasivam@...aro.org, vkoul@...nel.org, kishon@...nel.org, 
	robh@...nel.org, andersson@...nel.org, konradybcio@...nel.org, krzk+dt@...nel.org, 
	conor+dt@...nel.org, mturquette@...libre.com, sboyd@...nel.org, abel.vesa@...aro.org, 
	quic_msarkar@...cinc.com, quic_devipriy@...cinc.com, dmitry.baryshkov@...aro.org, 
	kw@...ux.com, lpieralisi@...nel.org, neil.armstrong@...aro.org, 
	linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-pci@...r.kernel.org, devicetree@...r.kernel.org, linux-clk@...r.kernel.org, 
	johan+linaro@...nel.org
Subject: Re: [PATCH v7 3/7] dt-bindings: PCI: qcom,pcie-x1e80100: Add
 'global' interrupt

On Wed, Oct 16, 2024 at 08:04:08PM -0700, Qiang Yu wrote:
> Qcom PCIe RC controllers are capable of generating 'global' SPI interrupt
> to the host CPU. This interrupt can be used by the device driver to handle
> PCIe link specific events such as Link up and Link down, which give the
> driver a chance to start bus enumeration on its own when link is up and
> initiate link training if link goes to a bad state. The PCIe driver can
> still work without this interrupt but it will provide a nice user
> experience when device gets plugged and removed.
> 
> Hence, document it in the binding along with the existing MSI interrupts.
> Global interrupt is parsed as optional in driver, so adding it in bindings
> will not break the ABI.
> 
> Signed-off-by: Qiang Yu <quic_qianyu@...cinc.com>
> ---
>  .../devicetree/bindings/pci/qcom,pcie-x1e80100.yaml      | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof