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Subject[PATCH V2] usb: ehci-platform: use helper variables in probe function
Date
Probing function was using &dev->dev and dev->dev.of_node over 20 times
so I believe it made sense to use helper variables for both of them.
To avoid some uncommon variable name for struct device I first replaced
existing dev variable with pdev.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
---
V2: Use 2 extra tabs after line break to match one of already used
coding styles.
---
drivers/usb/host/ehci-platform.c | 65 +++++++++++++++++++---------------------
1 file changed, 31 insertions(+), 34 deletions(-)

diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 6816b8c..d67dd92 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -143,11 +143,13 @@ static struct usb_ehci_pdata ehci_platform_defaults = {
.power_off = ehci_platform_power_off,
};

-static int ehci_platform_probe(struct platform_device *dev)
+static int ehci_platform_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
struct usb_hcd *hcd;
struct resource *res_mem;
- struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
+ struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
struct ehci_platform_priv *priv;
struct ehci_hcd *ehci;
int err, irq, phy_num, clk = 0, rst;
@@ -162,52 +164,49 @@ static int ehci_platform_probe(struct platform_device *dev)
if (!pdata)
pdata = &ehci_platform_defaults;

- err = dma_coerce_mask_and_coherent(&dev->dev,
+ err = dma_coerce_mask_and_coherent(dev,
pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
if (err) {
- dev_err(&dev->dev, "Error: DMA mask configuration failed\n");
+ dev_err(dev, "Error: DMA mask configuration failed\n");
return err;
}

- irq = platform_get_irq(dev, 0);
+ irq = platform_get_irq(pdev, 0);
if (irq < 0) {
- dev_err(&dev->dev, "no irq provided");
+ dev_err(dev, "no irq provided");
return irq;
}

- hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
- dev_name(&dev->dev));
+ hcd = usb_create_hcd(&ehci_platform_hc_driver, dev, dev_name(dev));
if (!hcd)
return -ENOMEM;

- platform_set_drvdata(dev, hcd);
- dev->dev.platform_data = pdata;
+ platform_set_drvdata(pdev, hcd);
+ dev->platform_data = pdata;
priv = hcd_to_ehci_priv(hcd);
ehci = hcd_to_ehci(hcd);

- if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
- if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
+ if (pdata == &ehci_platform_defaults && np) {
+ if (of_property_read_bool(np, "big-endian-regs"))
ehci->big_endian_mmio = 1;

- if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
+ if (of_property_read_bool(np, "big-endian-desc"))
ehci->big_endian_desc = 1;

- if (of_property_read_bool(dev->dev.of_node, "big-endian"))
+ if (of_property_read_bool(np, "big-endian"))
ehci->big_endian_mmio = ehci->big_endian_desc = 1;

- if (of_property_read_bool(dev->dev.of_node,
- "needs-reset-on-resume"))
+ if (of_property_read_bool(np, "needs-reset-on-resume"))
priv->reset_on_resume = true;

- if (of_property_read_bool(dev->dev.of_node,
- "has-transaction-translator"))
+ if (of_property_read_bool(np, "has-transaction-translator"))
hcd->has_tt = 1;

- priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
- "phys", "#phy-cells");
+ priv->num_phys = of_count_phandle_with_args(np, "phys",
+ "#phy-cells");

if (priv->num_phys > 0) {
- priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
+ priv->phys = devm_kcalloc(dev, priv->num_phys,
sizeof(struct phy *), GFP_KERNEL);
if (!priv->phys)
return -ENOMEM;
@@ -216,7 +215,7 @@ static int ehci_platform_probe(struct platform_device *dev)

for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
priv->phys[phy_num] = devm_of_phy_get_by_index(
- &dev->dev, dev->dev.of_node, phy_num);
+ dev, np, phy_num);
if (IS_ERR(priv->phys[phy_num])) {
err = PTR_ERR(priv->phys[phy_num]);
goto err_put_hcd;
@@ -224,7 +223,7 @@ static int ehci_platform_probe(struct platform_device *dev)
}

for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
- priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
+ priv->clks[clk] = of_clk_get(np, clk);
if (IS_ERR(priv->clks[clk])) {
err = PTR_ERR(priv->clks[clk]);
if (err == -EPROBE_DEFER)
@@ -237,7 +236,7 @@ static int ehci_platform_probe(struct platform_device *dev)

for (rst = 0; rst < EHCI_MAX_RSTS; rst++) {
priv->rsts[rst] = devm_reset_control_get_shared_by_index(
- &dev->dev, rst);
+ dev, rst);
if (IS_ERR(priv->rsts[rst])) {
err = PTR_ERR(priv->rsts[rst]);
if (err == -EPROBE_DEFER)
@@ -262,29 +261,27 @@ static int ehci_platform_probe(struct platform_device *dev)

#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
if (ehci->big_endian_mmio) {
- dev_err(&dev->dev,
- "Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
+ dev_err(dev, "Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
err = -EINVAL;
goto err_reset;
}
#endif
#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
if (ehci->big_endian_desc) {
- dev_err(&dev->dev,
- "Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
+ dev_err(dev, "Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
err = -EINVAL;
goto err_reset;
}
#endif

if (pdata->power_on) {
- err = pdata->power_on(dev);
+ err = pdata->power_on(pdev);
if (err < 0)
goto err_reset;
}

- res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
- hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hcd->regs = devm_ioremap_resource(dev, res_mem);
if (IS_ERR(hcd->regs)) {
err = PTR_ERR(hcd->regs);
goto err_power;
@@ -297,13 +294,13 @@ static int ehci_platform_probe(struct platform_device *dev)
goto err_power;

device_wakeup_enable(hcd->self.controller);
- platform_set_drvdata(dev, hcd);
+ platform_set_drvdata(pdev, hcd);

return err;

err_power:
if (pdata->power_off)
- pdata->power_off(dev);
+ pdata->power_off(pdev);
err_reset:
while (--rst >= 0)
reset_control_assert(priv->rsts[rst]);
@@ -312,7 +309,7 @@ err_put_clks:
clk_put(priv->clks[clk]);
err_put_hcd:
if (pdata == &ehci_platform_defaults)
- dev->dev.platform_data = NULL;
+ dev->platform_data = NULL;

usb_put_hcd(hcd);

--
1.8.4.5
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