[PATCH v2] USB: ohci-pxa27x: add DT bindings

[Daniel Mack]

(Cc Greg)

On 30.07.2012 09:29, Daniel Mack wrote:
> Add DT bindings to the ohci-pxa27x driver and some documentation.
> 
> Successfully tested on a PXA3xx board.
> 
> Signed-off-by: Daniel Mack <zonque at gmail.com>
> ---
> Changes from v1:
>  - renamed "mrvl" to "marvell"
> 
> Greg, I think that would best go through your usb tree. Is that ok?
> 
> 
>  Documentation/devicetree/bindings/usb/pxa-usb.txt | 31 +++++++++++
>  drivers/usb/host/ohci-pxa27x.c                    | 68 +++++++++++++++++++++++
>  2 files changed, 99 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/pxa-usb.txt
> 
> diff --git a/Documentation/devicetree/bindings/usb/pxa-usb.txt b/Documentation/devicetree/bindings/usb/pxa-usb.txt
> new file mode 100644
> index 0000000..79729a9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/pxa-usb.txt
> @@ -0,0 +1,31 @@
> +PXA USB controllers
> +
> +OHCI
> +
> +Required properties:
> + - compatible: Should be "marvell,pxa-ohci" for USB controllers
> +   used in host mode.
> +
> +Optional properties:
> + - "marvell,enable-port1", "marvell,enable-port2", "marvell,enable-port3"
> +   If present, enables the appropriate USB port of the controller.
> + - "marvell,port-mode" selects the mode of the ports:
> +	1 = PMM_NPS_MODE
> +	2 = PMM_GLOBAL_MODE
> +	3 = PMM_PERPORT_MODE
> + - "marvell,power-sense-low" - power sense pin is low-active.
> + - "marvell,power-control-low" - power control pin is low-active.
> + - "marvell,no-oc-protection" - disable over-current protection.
> + - "marvell,oc-mode-perport" - enable per-port over-current protection.
> + - "marvell,power_on_delay" Power On to Power Good time - in ms.
> +
> +Example:
> +
> +	usb0: ohci at 4c000000 {
> +		compatible = "marvell,pxa-ohci", "usb-ohci";
> +		reg = <0x4c000000 0x100000>;
> +		interrupts = <18>;
> +		marvell,enable-port1;
> +		marvell,port-mode = <2>; /* PMM_GLOBAL_MODE */
> +	};
> +
> diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
> index e1a3cc6..77f4402 100644
> --- a/drivers/usb/host/ohci-pxa27x.c
> +++ b/drivers/usb/host/ohci-pxa27x.c
> @@ -23,6 +23,8 @@
>  #include <linux/signal.h>
>  #include <linux/platform_device.h>
>  #include <linux/clk.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_gpio.h>
>  #include <mach/hardware.h>
>  #include <mach/ohci.h>
>  #include <mach/pxa3xx-u2d.h>
> @@ -272,6 +274,67 @@ static void pxa27x_stop_hc(struct pxa27x_ohci *ohci, struct device *dev)
>  	clk_disable_unprepare(ohci->clk);
>  }
>  
> +#ifdef CONFIG_OF
> +static const struct of_device_id pxa_ohci_dt_ids[] = {
> +	{ .compatible = "marvell,pxa-ohci" },
> +	{ }
> +};
> +
> +MODULE_DEVICE_TABLE(of, pxa_ohci_dt_ids);
> +
> +static u64 pxa_ohci_dma_mask = DMA_BIT_MASK(32);
> +
> +static int __devinit ohci_pxa_of_init(struct platform_device *pdev)
> +{
> +	struct device_node *np = pdev->dev.of_node;
> +	struct pxaohci_platform_data *pdata;
> +	u32 tmp;
> +
> +	if (!np)
> +		return 0;
> +
> +	/* Right now device-tree probed devices don't get dma_mask set.
> +	 * Since shared usb code relies on it, set it here for now.
> +	 * Once we have dma capability bindings this can go away.
> +	 */
> +	if (!pdev->dev.dma_mask)
> +		pdev->dev.dma_mask = &pxa_ohci_dma_mask;
> +
> +	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
> +	if (!pdata)
> +		return -ENOMEM;
> +
> +	if (of_get_property(np, "marvell,enable-port1", NULL))
> +		pdata->flags |= ENABLE_PORT1;
> +	if (of_get_property(np, "marvell,enable-port2", NULL))
> +		pdata->flags |= ENABLE_PORT2;
> +	if (of_get_property(np, "marvell,enable-port3", NULL))
> +		pdata->flags |= ENABLE_PORT3;
> +	if (of_get_property(np, "marvell,port-sense-low", NULL))
> +		pdata->flags |= POWER_SENSE_LOW;
> +	if (of_get_property(np, "marvell,power-control-low", NULL))
> +		pdata->flags |= POWER_CONTROL_LOW;
> +	if (of_get_property(np, "marvell,no-oc-protection", NULL))
> +		pdata->flags |= NO_OC_PROTECTION;
> +	if (of_get_property(np, "marvell,oc-mode-perport", NULL))
> +		pdata->flags |= OC_MODE_PERPORT;
> +	if (!of_property_read_u32(np, "marvell,power-on-delay", &tmp))
> +		pdata->power_on_delay = tmp;
> +	if (!of_property_read_u32(np, "marvell,port-mode", &tmp))
> +		pdata->port_mode = tmp;
> +	if (!of_property_read_u32(np, "marvell,power-budget", &tmp))
> +		pdata->power_budget = tmp;
> +
> +	pdev->dev.platform_data = pdata;
> +
> +	return 0;
> +}
> +#else
> +static int __devinit ohci_pxa_of_init(struct platform_device *pdev)
> +{
> +	return 0;
> +}
> +#endif
>  
>  /*-------------------------------------------------------------------------*/
>  
> @@ -297,6 +360,10 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
>  	struct resource *r;
>  	struct clk *usb_clk;
>  
> +	retval = ohci_pxa_of_init(pdev);
> +	if (retval)
> +		return retval;
> +
>  	inf = pdev->dev.platform_data;
>  
>  	if (!inf)
> @@ -544,6 +611,7 @@ static struct platform_driver ohci_hcd_pxa27x_driver = {
>  	.driver		= {
>  		.name	= "pxa27x-ohci",
>  		.owner	= THIS_MODULE,
> +		.of_match_table = of_match_ptr(pxa_ohci_dt_ids),
>  #ifdef CONFIG_PM
>  		.pm	= &ohci_hcd_pxa27x_pm_ops,
>  #endif
>