linux-kernel - Re: [PATCH V2] PCI: qcom: Use PARF_SLV_ADDR_SPACE_SIZE for ops_2_3

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Date:   Wed, 5 Jul 2023 14:14:54 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Sricharan Ramabadhran <quic_srichara@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, sboyd@...nel.org, mturquette@...libre.com,
        lpieralisi@...nel.org, bhelgaas@...gle.com,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-pci@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH V2] PCI: qcom: Use PARF_SLV_ADDR_SPACE_SIZE for ops_2_3_3

On Mon, Jul 03, 2023 at 11:27:57PM +0530, Sricharan Ramabadhran wrote:
> PARF_SLV_ADDR_SPACE_SIZE_2_3_3 macro is used for IPQ8074
> 2_3_3 post_init ops. pcie slave addr size was initially set

PCIe

> to 0x358, but was wrongly changed to 0x168 as a part of

commit 39171b33f652 ("PCI: qcom: Remove PCIE20_ prefix from register definitions")

> "PCI: qcom: Remove PCIE20_ prefix from register definitions"
> Fixing it, by using the right macro PARF_SLV_ADDR_SPACE_SIZE
> and removing the unused PARF_SLV_ADDR_SPACE_SIZE_2_3_3.
> 

Commit message should be imperative.

> Without this pcie bring up on IPQ8074 is broken now.
> 
> Fixes: 39171b33f652 ("PCI: qcom: Remove PCIE20_ prefix from register definitions")
> Signed-off-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
> ---
>  [V2] Fixed the 'fixes tag' correctly, subject, right macro usage
> 
>  drivers/pci/controller/dwc/pcie-qcom.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 4ab30892f6ef..1689d072fe86 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -43,7 +43,6 @@
>  #define PARF_PHY_REFCLK				0x4c
>  #define PARF_CONFIG_BITS			0x50
>  #define PARF_DBI_BASE_ADDR			0x168
> -#define PARF_SLV_ADDR_SPACE_SIZE_2_3_3		0x16c /* Register offset specific to IP ver 2.3.3 */
>  #define PARF_MHI_CLOCK_RESET_CTRL		0x174
>  #define PARF_AXI_MSTR_WR_ADDR_HALT		0x178
>  #define PARF_AXI_MSTR_WR_ADDR_HALT_V2		0x1a8
> @@ -811,7 +810,7 @@ static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie)
>  	u32 val;
>  
>  	writel(SLV_ADDR_SPACE_SZ,
> -		pcie->parf + PARF_SLV_ADDR_SPACE_SIZE_2_3_3);
> +		pcie->parf + PARF_SLV_ADDR_SPACE_SIZE);

This could be wrapped in the above line itself.

- Mani

>  
>  	val = readl(pcie->parf + PARF_PHY_CTRL);
>  	val &= ~PHY_TEST_PWR_DOWN;
> -- 
> 2.34.1
> 

-- 
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