Commit 00a0b1d5 authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I Committed by Felipe Balbi
Browse files

usb: musb: omap: Add device tree support for omap musb glue 



Added device tree support for omap musb driver and updated the
Documentation with device tree binding information.

Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 5ec40590

Documentation/devicetree/bindings/usb/omap-usb.txt

0 → 100644
+33 −0
Original line number Diff line number Diff line 
OMAP GLUE



OMAP MUSB GLUE

 - compatible : Should be "ti,omap4-musb" or "ti,omap3-musb"

 - ti,hwmods : must be "usb_otg_hs"

 - multipoint : Should be "1" indicating the musb controller supports

   multipoint. This is a MUSB configuration-specific setting.

 - num_eps : Specifies the number of endpoints. This is also a

   MUSB configuration-specific setting. Should be set to "16"

 - ram_bits : Specifies the ram address size. Should be set to "12"

 - interface_type : This is a board specific setting to describe the type of

   interface between the controller and the phy. It should be "0" or "1"

   specifying ULPI and UTMI respectively.

 - mode : Should be "3" to represent OTG. "1" signifies HOST and "2"

   represents PERIPHERAL.

 - power : Should be "50". This signifies the controller can supply upto

   100mA when operating in host mode.



SOC specific device node entry

usb_otg_hs: usb_otg_hs@4a0ab000 {

	compatible = "ti,omap4-musb";

	ti,hwmods = "usb_otg_hs";

	multipoint = <1>;

	num_eps = <16>;

	ram_bits = <12>;

};



Board specific device node entry

&usb_otg_hs {

	interface_type = <1>;

	mode = <3>;

	power = <50>;

};

drivers/usb/musb/omap2430.c

+54 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include <linux/init.h>

#include <linux/list.h>

#include <linux/io.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/dma-mapping.h>

#include <linux/pm_runtime.h>
@@ -470,8 +471,11 @@ static u64 omap2430_dmamask = DMA_BIT_MASK(32); 
static int __devinit omap2430_probe(struct platform_device *pdev)

{

	struct musb_hdrc_platform_data	*pdata = pdev->dev.platform_data;

	struct omap_musb_board_data	*data;

	struct platform_device		*musb;

	struct omap2430_glue		*glue;

	struct device_node		*np = pdev->dev.of_node;

	struct musb_hdrc_config		*config;

	struct resource			*res;

	int				ret = -ENOMEM;
@@ -501,6 +505,42 @@ static int __devinit omap2430_probe(struct platform_device *pdev) 
	if (glue->control_otghs == NULL)

		dev_dbg(&pdev->dev, "Failed to obtain control memory\n");



	if (np) {

		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);

		if (!pdata) {

			dev_err(&pdev->dev,

				"failed to allocate musb platfrom data\n");

			ret = -ENOMEM;

			goto err1;

		}



		data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);

		if (!data) {

			dev_err(&pdev->dev,

					"failed to allocate musb board data\n");

			ret = -ENOMEM;

			goto err1;

		}



		config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);

		if (!data) {

			dev_err(&pdev->dev,

				"failed to allocate musb hdrc config\n");

			goto err1;

		}



		of_property_read_u32(np, "mode", (u32 *)&pdata->mode);

		of_property_read_u32(np, "interface_type",

						(u32 *)&data->interface_type);

		of_property_read_u32(np, "num_eps", (u32 *)&config->num_eps);

		of_property_read_u32(np, "ram_bits", (u32 *)&config->ram_bits);

		of_property_read_u32(np, "power", (u32 *)&pdata->power);

		config->multipoint = of_property_read_bool(np, "multipoint");



		pdata->board_data	= data;

		pdata->config		= config;

	}



	pdata->platform_ops		= &omap2430_ops;



	platform_set_drvdata(pdev, glue);
@@ -597,12 +637,26 @@ static struct dev_pm_ops omap2430_pm_ops = { 
#define DEV_PM_OPS	NULL

#endif



#ifdef CONFIG_OF

static const struct of_device_id omap2430_id_table[] = {

	{

		.compatible = "ti,omap4-musb"

	},

	{

		.compatible = "ti,omap3-musb"

	},

	{},

};

MODULE_DEVICE_TABLE(of, omap2430_id_table);

#endif



static struct platform_driver omap2430_driver = {

	.probe		= omap2430_probe,

	.remove		= __devexit_p(omap2430_remove),

	.driver		= {

		.name	= "musb-omap2430",

		.pm	= DEV_PM_OPS,

		.of_match_table = of_match_ptr(omap2430_id_table),

	},

};