[PATCH v4 2/3] PCI: imx6: introduce drvdata
From: Stefan Agner
Date: Tue Dec 04 2018 - 11:55:40 EST
Introduce driver data struct. This will simplify handling of device
specific differences.
Signed-off-by: Stefan Agner <stefan@xxxxxxxx>
Reviewed-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
---
Changes in v2:
- Split drvdata introduction in a separate patch
- Use an array instead of individual struct imx6_pcie_drvdata declarations
Changes in v3:
- Rebase on pci/dwc
Changes in v4:
- Rebase on pci/dwc
drivers/pci/controller/dwc/pci-imx6.c | 48 ++++++++++++++++-----------
1 file changed, 29 insertions(+), 19 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 26087b3da590..45cbdf2ccf80 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -41,6 +41,10 @@ enum imx6_pcie_variants {
IMX7D,
};
+struct imx6_pcie_drvdata {
+ enum imx6_pcie_variants variant;
+};
+
struct imx6_pcie {
struct dw_pcie *pci;
int reset_gpio;
@@ -53,7 +57,6 @@ struct imx6_pcie {
struct reset_control *pciephy_reset;
struct reset_control *apps_reset;
struct reset_control *turnoff_reset;
- enum imx6_pcie_variants variant;
u32 tx_deemph_gen1;
u32 tx_deemph_gen2_3p5db;
u32 tx_deemph_gen2_6db;
@@ -66,6 +69,7 @@ struct imx6_pcie {
struct device *pd_pcie;
/* power domain for pcie phy */
struct device *pd_pcie_phy;
+ const struct imx6_pcie_drvdata *drvdata;
};
/* Parameters for the waiting for PCIe PHY PLL to lock on i.MX7 */
@@ -340,7 +344,7 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
{
struct device *dev = imx6_pcie->pci->dev;
- switch (imx6_pcie->variant) {
+ switch (imx6_pcie->drvdata->variant) {
case IMX7D:
reset_control_assert(imx6_pcie->pciephy_reset);
reset_control_assert(imx6_pcie->apps_reset);
@@ -382,7 +386,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
struct device *dev = pci->dev;
int ret = 0;
- switch (imx6_pcie->variant) {
+ switch (imx6_pcie->drvdata->variant) {
case IMX6SX:
ret = clk_prepare_enable(imx6_pcie->pcie_inbound_axi);
if (ret) {
@@ -485,7 +489,7 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
!imx6_pcie->gpio_active_high);
}
- switch (imx6_pcie->variant) {
+ switch (imx6_pcie->drvdata->variant) {
case IMX7D:
reset_control_deassert(imx6_pcie->pciephy_reset);
imx7d_pcie_wait_for_phy_pll_lock(imx6_pcie);
@@ -523,7 +527,7 @@ static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
{
- switch (imx6_pcie->variant) {
+ switch (imx6_pcie->drvdata->variant) {
case IMX7D:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0);
@@ -645,7 +649,7 @@ static void imx6_pcie_ltssm_enable(struct device *dev)
{
struct imx6_pcie *imx6_pcie = dev_get_drvdata(dev);
- switch (imx6_pcie->variant) {
+ switch (imx6_pcie->drvdata->variant) {
case IMX6Q:
case IMX6SX:
case IMX6QP:
@@ -698,7 +702,7 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
tmp |= PORT_LOGIC_SPEED_CHANGE;
dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, tmp);
- if (imx6_pcie->variant != IMX7D) {
+ if (imx6_pcie->drvdata->variant != IMX7D) {
/*
* On i.MX7, DIRECT_SPEED_CHANGE behaves differently
* from i.MX6 family when no link speed transition
@@ -801,7 +805,7 @@ static void imx6_pcie_ltssm_disable(struct device *dev)
{
struct imx6_pcie *imx6_pcie = dev_get_drvdata(dev);
- switch (imx6_pcie->variant) {
+ switch (imx6_pcie->drvdata->variant) {
case IMX6SX:
case IMX6QP:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
@@ -827,7 +831,7 @@ static void imx6_pcie_pm_turnoff(struct imx6_pcie *imx6_pcie)
}
/* Others poke directly at IOMUXC registers */
- switch (imx6_pcie->variant) {
+ switch (imx6_pcie->drvdata->variant) {
case IMX6SX:
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
IMX6SX_GPR12_PCIE_PM_TURN_OFF,
@@ -857,7 +861,7 @@ static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie)
clk_disable_unprepare(imx6_pcie->pcie_phy);
clk_disable_unprepare(imx6_pcie->pcie_bus);
- switch (imx6_pcie->variant) {
+ switch (imx6_pcie->drvdata->variant) {
case IMX6SX:
clk_disable_unprepare(imx6_pcie->pcie_inbound_axi);
break;
@@ -873,8 +877,8 @@ static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie)
static inline bool imx6_pcie_supports_suspend(struct imx6_pcie *imx6_pcie)
{
- return (imx6_pcie->variant == IMX7D ||
- imx6_pcie->variant == IMX6SX);
+ return (imx6_pcie->drvdata->variant == IMX7D ||
+ imx6_pcie->drvdata->variant == IMX6SX);
}
static int imx6_pcie_suspend_noirq(struct device *dev)
@@ -939,8 +943,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
pci->ops = &dw_pcie_ops;
imx6_pcie->pci = pci;
- imx6_pcie->variant =
- (enum imx6_pcie_variants)of_device_get_match_data(dev);
+ imx6_pcie->drvdata = of_device_get_match_data(dev);
dbi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pci->dbi_base = devm_ioremap_resource(dev, dbi_base);
@@ -984,7 +987,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
return PTR_ERR(imx6_pcie->pcie);
}
- switch (imx6_pcie->variant) {
+ switch (imx6_pcie->drvdata->variant) {
case IMX6SX:
imx6_pcie->pcie_inbound_axi = devm_clk_get(dev,
"pcie_inbound_axi");
@@ -1082,11 +1085,18 @@ static void imx6_pcie_shutdown(struct platform_device *pdev)
imx6_pcie_assert_core_reset(imx6_pcie);
}
+static const struct imx6_pcie_drvdata drvdata[] = {
+ [IMX6Q] = { .variant = IMX6Q },
+ [IMX6SX] = { .variant = IMX6SX },
+ [IMX6QP] = { .variant = IMX6QP },
+ [IMX7D] = { .variant = IMX7D },
+};
+
static const struct of_device_id imx6_pcie_of_match[] = {
- { .compatible = "fsl,imx6q-pcie", .data = (void *)IMX6Q, },
- { .compatible = "fsl,imx6sx-pcie", .data = (void *)IMX6SX, },
- { .compatible = "fsl,imx6qp-pcie", .data = (void *)IMX6QP, },
- { .compatible = "fsl,imx7d-pcie", .data = (void *)IMX7D, },
+ { .compatible = "fsl,imx6q-pcie", .data = &drvdata[IMX6Q], },
+ { .compatible = "fsl,imx6sx-pcie", .data = &drvdata[IMX6SX], },
+ { .compatible = "fsl,imx6qp-pcie", .data = &drvdata[IMX6QP], },
+ { .compatible = "fsl,imx7d-pcie", .data = &drvdata[IMX7D], },
{},
};
--
2.19.1