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Code Issues Releases Wiki Activity

PCI: imx6: Introduce drvdata

Browse source 
Introduce driver data struct. This will simplify handling of device
specific differences.

Signed-off-by: Stefan Agner <stefan@agner.ch>
[andrew.smirnov@gmail.com reformatted drvdata, to simplify future diffs]
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: "A.s. Dong" <aisheng.dong@nxp.com>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
This commit is contained in:
Andrey Smirnov 2019-02-01 16:15:20 -08:00 committed by Lorenzo Pieralisi
parent 657722570a
commit e8e4d4e957
1 changed files with 37 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

56
drivers/pci/controller/dwc/pci-imx6.c
View file

@ -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 */
@ -339,7 +343,7 @@ 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);
@ -381,7 +385,7 @@ 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) {
@ -484,7 +488,7 @@ 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);
@ -522,7 +526,7 @@ 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);
@ -644,7 +648,7 @@ 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:
@ -697,7 +701,7 @@ 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
@ -794,7 +798,7 @@ 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,
@ -820,7 +824,7 @@ 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,
@ -850,7 +854,7 @@ 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;
@ -866,8 +870,8 @@ 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)
@ -933,8 +937,7 @@ 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);
@ -978,7 +981,7 @@ 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");
@ -1084,11 +1087,26 @@ 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], },
{},
};