lkml.org 
[lkml]   [2019]   [Jan]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v5 1/4] PCI: imx6: introduce drvdata
Date
Introduce driver data struct. This will simplify handling of device
specific differences.

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>
Cc: linux-imx@nxp.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
[andrew.smirnov@gmail.com reformatted drvdata, to simplify future diffs]
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
drivers/pci/controller/dwc/pci-imx6.c | 56 ++++++++++++++++++---------
1 file changed, 37 insertions(+), 19 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 25a2b7683e55..efff3d5e9162 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 +1085,26 @@ 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], },
{},
};

--
2.20.1
\
 
 \ /
  Last update: 2019-01-12 22:57    [W:0.034 / U:0.336 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site