[PATCH 01/13] usb: phy: nop: Add device tree support and binding information

[Felipe Balbi]

On Tue, Feb 05, 2013 at 10:30:49AM +0200, Roger Quadros wrote:
> On 02/05/2013 09:26 AM, Felipe Balbi wrote:
> > Hi,
> > 
> > On Mon, Feb 04, 2013 at 05:58:48PM +0200, Roger Quadros wrote:
> >> The PHY clock, clock rate, VCC regulator and RESET regulator
> >> can now be provided via device tree.
> >>
> >> Signed-off-by: Roger Quadros <rogerq at ti.com>
> >> ---
> >>  .../devicetree/bindings/usb/usb-nop-xceiv.txt      |   34 ++++++++++++++++++++
> >>  drivers/usb/otg/nop-usb-xceiv.c                    |   31 ++++++++++++++++++
> >>  2 files changed, 65 insertions(+), 0 deletions(-)
> >>  create mode 100644 Documentation/devicetree/bindings/usb/usb-nop-xceiv.txt
> >>
> >> diff --git a/Documentation/devicetree/bindings/usb/usb-nop-xceiv.txt b/Documentation/devicetree/bindings/usb/usb-nop-xceiv.txt
> >> new file mode 100644
> >> index 0000000..d7e2726
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/usb/usb-nop-xceiv.txt
> >> @@ -0,0 +1,34 @@
> >> +USB NOP PHY
> >> +
> >> +Required properties:
> >> +- compatible: should be usb-nop-xceiv
> >> +
> >> +Optional properties:
> >> +- clocks: phandle to the PHY clock. Use as per Documentation/devicetree
> >> +  /bindings/clock/clock-bindings.txt
> >> +  This property is required if clock-frequency is specified.
> >> +
> >> +- clock-names: Should be "main_clk"
> >> +
> >> +- clock-frequency: the clock frequency (in Hz) that the PHY clock must
> >> +  be configured to.
> >> +
> >> +- vcc-supply: phandle to the regulator that provides RESET to the PHY.
> >> +
> >> +- reset-supply: phandle to the regulator that provides power to the PHY.
> >> +
> >> +Example:
> >> +
> >> +	hsusb1_phy {
> >> +		compatible = "usb-nop-xceiv";
> >> +		clock-frequency = <19200000>;
> >> +		clocks = <&osc 0>;
> >> +		clock-names = "main_clk";
> >> +		vcc-supply = <&hsusb1_vcc_regulator>;
> >> +		reset-supply = <&hsusb1_reset_regulator>;
> >> +	};
> >> +
> >> +hsusb1_phy is a NOP USB PHY device that gets its clock from an oscillator
> >> +and expects that clock to be configured to 19.2MHz by the NOP PHY driver.
> >> +hsusb1_vcc_regulator provides power to the PHY and hsusb1_reset_regulator
> >> +controls RESET.
> >> diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
> >> index ac027a1..adbb7ab 100644
> >> --- a/drivers/usb/otg/nop-usb-xceiv.c
> >> +++ b/drivers/usb/otg/nop-usb-xceiv.c
> >> @@ -34,6 +34,7 @@
> >>  #include <linux/slab.h>
> >>  #include <linux/clk.h>
> >>  #include <linux/regulator/consumer.h>
> >> +#include <linux/of.h>
> >>  
> >>  struct nop_usb_xceiv {
> >>  	struct usb_phy		phy;
> >> @@ -138,8 +139,19 @@ static int nop_set_host(struct usb_otg *otg, struct usb_bus *host)
> >>  	return 0;
> >>  }
> >>  
> >> +static void nop_xeiv_get_dt_pdata(struct device *dev,
> > 
> > asking to remove, but xeiv != xceiv :-)
> > 
> >> +				struct nop_usb_xceiv_platform_data *pdata)
> >> +{
> >> +	struct device_node *node = dev->of_node;
> >> +	u32 clk_rate;
> >> +
> >> +	if (!of_property_read_u32(node, "clock-frequency", &clk_rate))
> >> +		pdata->clk_rate = clk_rate;
> >> +}
> >> +
> >>  static int nop_usb_xceiv_probe(struct platform_device *pdev)
> >>  {
> >> +	struct device *dev = &pdev->dev;
> >>  	struct nop_usb_xceiv_platform_data *pdata = pdev->dev.platform_data;
> >>  	struct nop_usb_xceiv	*nop;
> >>  	enum usb_phy_type	type = USB_PHY_TYPE_USB2;
> >> @@ -153,6 +165,17 @@ static int nop_usb_xceiv_probe(struct platform_device *pdev)
> >>  	if (!nop->phy.otg)
> >>  		return -ENOMEM;
> >>  
> >> +	if (dev->of_node) {
> >> +		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
> >> +		if (!pdata) {
> >> +			dev_err(dev, "Memory allocation failure\n");
> >> +			return -ENOMEM;
> >> +		}
> >> +		nop_xeiv_get_dt_pdata(dev, pdata);
> > 
> > actually, I would prefer to not create pdata at all. I mean, ideally
> > pdata would be used to initialize fields in your own structure, so first
> > move clk_rate to your own private structure, copy pdata's clk_rate value
> > to that, then you don't need this hackery when using DT.
> > 
> OK, got it. Will revise.

Cool, after that you can add my:

Acked-by: Felipe Balbi <balbi at ti.com>

-- 
balbi
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