linux-kernel - Re: [PATCH v3 8/9] PCI: imx6: Add i.MX6SX PCIe EP support

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Message-ID: <20230810035314.GB4860@thinkpad>
Date:   Thu, 10 Aug 2023 09:23:14 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Richard Zhu <hongxing.zhu@....com>
Cc:     frank.li@....com, l.stach@...gutronix.de, shawnguo@...nel.org,
        lpieralisi@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        linux-imx@....com
Subject: Re: [PATCH v3 8/9] PCI: imx6: Add i.MX6SX PCIe EP support

On Tue, Aug 08, 2023 at 01:34:17PM +0800, Richard Zhu wrote:
> Add the i.MX6SX PCIe EP support.
> 
> Signed-off-by: Richard Zhu <hongxing.zhu@....com>

Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

- Mani

> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 9a6531ddfef2..43c5251f5160 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -48,6 +48,7 @@ enum imx6_pcie_variants {
>  	IMX6Q,
>  	IMX6Q_EP,
>  	IMX6SX,
> +	IMX6SX_EP,
>  	IMX6QP,
>  	IMX6QP_EP,
>  	IMX7D,
> @@ -362,6 +363,7 @@ static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
>  				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0);
>  		break;
>  	case IMX6SX:
> +	case IMX6SX_EP:
>  		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
>  				   IMX6SX_GPR12_PCIE_RX_EQ_MASK,
>  				   IMX6SX_GPR12_PCIE_RX_EQ_2);
> @@ -560,6 +562,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
>  
>  	switch (imx6_pcie->drvdata->variant) {
>  	case IMX6SX:
> +	case IMX6SX_EP:
>  		ret = clk_prepare_enable(imx6_pcie->pcie_inbound_axi);
>  		if (ret) {
>  			dev_err(dev, "unable to enable pcie_axi clock\n");
> @@ -621,6 +624,7 @@ static void imx6_pcie_disable_ref_clk(struct imx6_pcie *imx6_pcie)
>  {
>  	switch (imx6_pcie->drvdata->variant) {
>  	case IMX6SX:
> +	case IMX6SX_EP:
>  		clk_disable_unprepare(imx6_pcie->pcie_inbound_axi);
>  		break;
>  	case IMX6QP:
> @@ -718,6 +722,7 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
>  		reset_control_assert(imx6_pcie->apps_reset);
>  		break;
>  	case IMX6SX:
> +	case IMX6SX_EP:
>  		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
>  				   IMX6SX_GPR12_PCIE_TEST_POWERDOWN,
>  				   IMX6SX_GPR12_PCIE_TEST_POWERDOWN);
> @@ -782,6 +787,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
>  		imx7d_pcie_wait_for_phy_pll_lock(imx6_pcie);
>  		break;
>  	case IMX6SX:
> +	case IMX6SX_EP:
>  		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR5,
>  				   IMX6SX_GPR5_PCIE_BTNRST_RESET, 0);
>  		break;
> @@ -840,6 +846,7 @@ static void imx6_pcie_ltssm_enable(struct device *dev)
>  	case IMX6Q:
>  	case IMX6Q_EP:
>  	case IMX6SX:
> +	case IMX6SX_EP:
>  	case IMX6QP:
>  	case IMX6QP_EP:
>  		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
> @@ -866,6 +873,7 @@ static void imx6_pcie_ltssm_disable(struct device *dev)
>  	case IMX6Q:
>  	case IMX6Q_EP:
>  	case IMX6SX:
> +	case IMX6SX_EP:
>  	case IMX6QP:
>  	case IMX6QP_EP:
>  		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
> @@ -1198,6 +1206,7 @@ static void imx6_pcie_pm_turnoff(struct imx6_pcie *imx6_pcie)
>  	/* Others poke directly at IOMUXC registers */
>  	switch (imx6_pcie->drvdata->variant) {
>  	case IMX6SX:
> +	case IMX6SX_EP:
>  	case IMX6QP:
>  	case IMX6QP_EP:
>  		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
> @@ -1361,6 +1370,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
>  
>  	switch (imx6_pcie->drvdata->variant) {
>  	case IMX6SX:
> +	case IMX6SX_EP:
>  		imx6_pcie->pcie_inbound_axi = devm_clk_get(dev,
>  							   "pcie_inbound_axi");
>  		if (IS_ERR(imx6_pcie->pcie_inbound_axi))
> @@ -1535,6 +1545,13 @@ static const struct imx6_pcie_drvdata drvdata[] = {
>  			 IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
>  		.gpr = "fsl,imx6q-iomuxc-gpr",
>  	},
> +	[IMX6SX_EP] = {
> +		.variant = IMX6SX_EP,
> +		.mode = DW_PCIE_EP_TYPE,
> +		.flags = IMX6_PCIE_FLAG_IMX6_PHY,
> +		.gpr = "fsl,imx6q-iomuxc-gpr",
> +		.epc_features = &imx6q_pcie_epc_features,
> +	},
>  	[IMX6QP] = {
>  		.variant = IMX6QP,
>  		.flags = IMX6_PCIE_FLAG_IMX6_PHY |
> @@ -1590,6 +1607,7 @@ static const struct of_device_id imx6_pcie_of_match[] = {
>  	{ .compatible = "fsl,imx6q-pcie",  .data = &drvdata[IMX6Q],  },
>  	{ .compatible = "fsl,imx6q-pcie-ep", .data = &drvdata[IMX6Q_EP], },
>  	{ .compatible = "fsl,imx6sx-pcie", .data = &drvdata[IMX6SX], },
> +	{ .compatible = "fsl,imx6sx-pcie-ep", .data = &drvdata[IMX6SX_EP], },
>  	{ .compatible = "fsl,imx6qp-pcie", .data = &drvdata[IMX6QP], },
>  	{ .compatible = "fsl,imx6qp-pcie-ep", .data = &drvdata[IMX6QP_EP], },
>  	{ .compatible = "fsl,imx7d-pcie",  .data = &drvdata[IMX7D],  },
> -- 
> 2.34.1
> 

-- 
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