linux-kernel - Re: [PATCH v4 6/9] PCI: imx6: Make *_enable_ref

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Message-ID: <20241022170514.s6ejwj2w64nivqui@thinkpad>
Date: Tue, 22 Oct 2024 22:35:14 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Richard Zhu <hongxing.zhu@....com>
Cc: kw@...ux.com, bhelgaas@...gle.com, lpieralisi@...nel.org,
	frank.li@....com, l.stach@...gutronix.de, robh+dt@...nel.org,
	conor+dt@...nel.org, shawnguo@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, festevam@...il.com,
	s.hauer@...gutronix.de, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, kernel@...gutronix.de,
	imx@...ts.linux.dev
Subject: Re: [PATCH v4 6/9] PCI: imx6: Make *_enable_ref_clk() function
 symmetric

On Tue, Oct 15, 2024 at 04:33:30PM +0800, Richard Zhu wrote:
> Ensure the *_enable_ref_clk() function is symmetric by addressing missing
> disable parts on some platforms.

This warrants a Fixes tag. And the patch subject should be something like,

"PCI: imx6: Fix the missing reference clock disable logic"

> Also, remove the duplicate
> imx7d_pcie_init_phy() function as it is the same as
> imx7d_pcie_enable_ref_clk().
> 

This is a cleanup, so should be a separate patch.

> Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> Reviewed-by: Frank Li <Frank.Li@....com>
> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 33 +++++++++++----------------
>  1 file changed, 13 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 93e2bcf9aa0a..161daad34a94 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -388,13 +388,6 @@ static int imx8mq_pcie_init_phy(struct imx_pcie *imx_pcie)
>  	return 0;
>  }
>  
> -static int imx7d_pcie_init_phy(struct imx_pcie *imx_pcie)
> -{
> -	regmap_update_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0);
> -
> -	return 0;
> -}
> -
>  static int imx_pcie_init_phy(struct imx_pcie *imx_pcie)
>  {
>  	regmap_update_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12,
> @@ -593,13 +586,13 @@ static int imx_pcie_attach_pd(struct device *dev)
>  
>  static int imx6sx_pcie_enable_ref_clk(struct imx_pcie *imx_pcie, bool enable)
>  {
> -	if (enable)
> -		regmap_clear_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12,
> -				  IMX6SX_GPR12_PCIE_TEST_POWERDOWN);
> -
> +	regmap_update_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12,
> +			   IMX6SX_GPR12_PCIE_TEST_POWERDOWN,
> +			   enable ? 0 : IMX6SX_GPR12_PCIE_TEST_POWERDOWN);
>  	return 0;
>  }
>  
> +

Spurious change.

- Mani

-- 
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