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Subject[RFC 7/7] PCI: imx6: Add the iMX8MP PCIe support
Date
Add the i.MX8MP PCIe support.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
---
drivers/pci/controller/dwc/pci-imx6.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index bb662f90d4f3..fcf7638d5071 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -51,6 +51,7 @@ enum imx6_pcie_variants {
IMX7D,
IMX8MQ,
IMX8MM,
+ IMX8MP,
};

#define IMX6_PCIE_FLAG_IMX6_PHY BIT(0)
@@ -379,6 +380,7 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
reset_control_assert(imx6_pcie->pciephy_reset);
fallthrough;
case IMX8MM:
+ case IMX8MP:
reset_control_assert(imx6_pcie->apps_reset);
break;
case IMX6SX:
@@ -407,7 +409,8 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
static unsigned int imx6_pcie_grp_offset(const struct imx6_pcie *imx6_pcie)
{
WARN_ON(imx6_pcie->drvdata->variant != IMX8MQ &&
- imx6_pcie->drvdata->variant != IMX8MM);
+ imx6_pcie->drvdata->variant != IMX8MM &&
+ imx6_pcie->drvdata->variant != IMX8MP);
return imx6_pcie->controller_id == 1 ? IOMUXC_GPR16 : IOMUXC_GPR14;
}

@@ -448,6 +451,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
break;
case IMX8MM:
case IMX8MQ:
+ case IMX8MP:
ret = clk_prepare_enable(imx6_pcie->pcie_aux);
if (ret) {
dev_err(dev, "unable to enable pcie_aux clock\n");
@@ -503,6 +507,7 @@ static int imx6_pcie_clk_enable(struct imx6_pcie *imx6_pcie)

switch (imx6_pcie->drvdata->variant) {
case IMX8MM:
+ case IMX8MP:
if (phy_power_on(imx6_pcie->phy))
dev_err(dev, "unable to power on PHY\n");
break;
@@ -603,8 +608,10 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
reset_control_deassert(imx6_pcie->pciephy_reset);
break;
case IMX8MM:
+ case IMX8MP:
if (phy_init(imx6_pcie->phy))
dev_err(dev, "waiting for phy ready timeout!\n");
+ return -ENODEV;
break;
case IMX7D:
reset_control_deassert(imx6_pcie->pciephy_reset);
@@ -678,6 +685,7 @@ static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
{
switch (imx6_pcie->drvdata->variant) {
case IMX8MM:
+ case IMX8MP:
/*
* The PHY initialization had been done in the PHY
* driver, break here directly.
@@ -823,6 +831,7 @@ static void imx6_pcie_ltssm_enable(struct device *dev)
case IMX7D:
case IMX8MQ:
case IMX8MM:
+ case IMX8MP:
reset_control_deassert(imx6_pcie->apps_reset);
break;
}
@@ -938,6 +947,7 @@ static void imx6_pcie_host_exit(struct pcie_port *pp)
imx6_pcie_clk_disable(imx6_pcie);
switch (imx6_pcie->drvdata->variant) {
case IMX8MM:
+ case IMX8MP:
if (phy_power_off(imx6_pcie->phy))
dev_err(dev, "unable to power off phy\n");
phy_exit(imx6_pcie->phy);
@@ -972,6 +982,7 @@ static void imx6_pcie_ltssm_disable(struct device *dev)
break;
case IMX7D:
case IMX8MM:
+ case IMX8MP:
reset_control_assert(imx6_pcie->apps_reset);
break;
default:
@@ -1028,6 +1039,7 @@ static int imx6_pcie_suspend_noirq(struct device *dev)
imx6_pcie_clk_disable(imx6_pcie);
switch (imx6_pcie->drvdata->variant) {
case IMX8MM:
+ case IMX8MP:
if (phy_power_off(imx6_pcie->phy))
dev_err(dev, "unable to power off PHY\n");
phy_exit(imx6_pcie->phy);
@@ -1177,6 +1189,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
}
break;
case IMX8MM:
+ case IMX8MP:
imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux");
if (IS_ERR(imx6_pcie->pcie_aux))
return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_aux),
@@ -1327,6 +1340,10 @@ static const struct imx6_pcie_drvdata drvdata[] = {
.variant = IMX8MM,
.flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
},
+ [IMX8MP] = {
+ .variant = IMX8MP,
+ .flags = IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
+ },
};

static const struct of_device_id imx6_pcie_of_match[] = {
@@ -1336,6 +1353,7 @@ static const struct of_device_id imx6_pcie_of_match[] = {
{ .compatible = "fsl,imx7d-pcie", .data = &drvdata[IMX7D], },
{ .compatible = "fsl,imx8mq-pcie", .data = &drvdata[IMX8MQ], },
{ .compatible = "fsl,imx8mm-pcie", .data = &drvdata[IMX8MM], },
+ { .compatible = "fsl,imx8mp-pcie", .data = &drvdata[IMX8MP], },
{},
};

--
2.25.1
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