linux-kernel - Re: [PATCH v6 06/10] PCI: imx6: Improve comment for workaround ERR010728

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Message-ID: <20240630161325.GC5264@thinkpad>
Date: Sun, 30 Jun 2024 21:43:25 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Frank Li <Frank.Li@....com>
Cc: Richard Zhu <hongxing.zhu@....com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	NXP Linux Team <linux-imx@....com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-pci@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v6 06/10] PCI: imx6: Improve comment for workaround
 ERR010728

On Mon, Jun 17, 2024 at 04:16:42PM -0400, Frank Li wrote:
> Improve comment about workaround ERR010727 by using official errata
> document content.
> 

It is useful to provide a link to the errata document in the commit message.

> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 22 +++++++++++++++++++---
>  1 file changed, 19 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 6f68bee111029..6e3ac3fc33745 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -715,9 +715,25 @@ static int imx7d_pcie_core_reset(struct imx_pcie *imx_pcie, bool assert)
>  		return 0;
>  
>  	/*
> -	 * Workaround for ERR010728, failure of PCI-e PLL VCO to
> -	 * oscillate, especially when cold. This turns off "Duty-cycle
> -	 * Corrector" and other mysterious undocumented things.
> +	 * Workaround for ERR010728 (IMX7DS_2N09P, Rev. 1.1, 4/2023):
> +	 *
> +	 * PCIe: PLL may fail to lock under corner conditions Initial VCO

Missing full stop after 'conditions'?

- Mani

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