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usb: musb: dsps: add dt support 

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

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Santhapuri, Damodar <damodar.santhapuri@ti.com>
Signed-off-by: Ravi Babu <ravibabu@ti.com>
[afzal@ti.com: use '-' instead of '_' for dt properties]
Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Ajay Kumar Gupta 2012-08-31 11:09:53 +00:00 committed by Felipe Balbi
parent db4a93202e
commit 65145677a6
2 changed files with 65 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
Documentation/devicetree/bindings/usb/am33xx-usb.txt Normal file
View File

@ -0,0 +1,14 @@
AM33XX MUSB GLUE
- compatible : Should be "ti,musb-am33xx"
- 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"
- port0_mode : Should be "3" to represent OTG. "1" signifies HOST and "2"
represents PERIPHERAL.
- port1_mode : Should be "1" to represent HOST. "3" signifies OTG and "2"
represents PERIPHERAL.
- power : Should be "250". This signifies the controller can supply upto
500mA when operating in host mode.

60
drivers/usb/musb/musb_dsps.c
View File

@ -31,6 +31,7 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
@ -45,6 +46,10 @@
#include "musb_core.h"
#ifdef CONFIG_OF
static const struct of_device_id musb_dsps_of_match[];
#endif
/**
* avoid using musb_readx()/musb_writex() as glue layer should not be
* dependent on musb core layer symbols.
@ -448,6 +453,8 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
struct device *dev = glue->dev;
struct platform_device *pdev = to_platform_device(dev);
struct musb_hdrc_platform_data *pdata = dev->platform_data;
struct device_node *np = pdev->dev.of_node;
struct musb_hdrc_config *config;
struct platform_device *musb;
struct resource *res;
struct resource resources[2];
@ -499,14 +506,40 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
glue->musb[id] = musb;
pdata->platform_ops = &dsps_ops;
ret = platform_device_add_resources(musb, resources, 2);
if (ret) {
dev_err(dev, "failed to add resources\n");
goto err2;
}
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 err2;
}
config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
if (!config) {
dev_err(&pdev->dev,
"failed to allocate musb hdrc config\n");
goto err2;
}
of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
sprintf(res_name, "port%d-mode", id);
of_property_read_u32(np, res_name, (u32 *)&pdata->mode);
of_property_read_u32(np, "power", (u32 *)&pdata->power);
config->multipoint = of_property_read_bool(np, "multipoint");
pdata->config = config;
}
pdata->platform_ops = &dsps_ops;
ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
if (ret) {
dev_err(dev, "failed to add platform_data\n");
@ -538,13 +571,21 @@ static void dsps_delete_musb_pdev(struct dsps_glue *glue, u8 id)
static int __devinit dsps_probe(struct platform_device *pdev)
{
const struct platform_device_id *id = platform_get_device_id(pdev);
const struct dsps_musb_wrapper *wrp =
(struct dsps_musb_wrapper *)id->driver_data;
struct device_node *np = pdev->dev.of_node;
const struct of_device_id *match;
const struct dsps_musb_wrapper *wrp;
struct dsps_glue *glue;
struct resource *iomem;
int ret, i;
match = of_match_node(musb_dsps_of_match, np);
if (!match) {
dev_err(&pdev->dev, "fail to get matching of_match struct\n");
ret = -EINVAL;
goto err0;
}
wrp = match->data;
/* allocate glue */
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
if (!glue) {
@ -693,13 +734,14 @@ static const struct platform_device_id musb_dsps_id_table[] __devinitconst = {
};
MODULE_DEVICE_TABLE(platform, musb_dsps_id_table);
#ifdef CONFIG_OF
static const struct of_device_id musb_dsps_of_match[] __devinitconst = {
{ .compatible = "musb-ti81xx", },
{ .compatible = "ti,ti81xx-musb", },
{ .compatible = "ti,am335x-musb", },
{ .compatible = "ti,musb-am33xx",
.data = (void *) &ti81xx_driver_data, },
{ },
};
MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
#endif
static struct platform_driver dsps_usbss_driver = {
.probe = dsps_probe,
@ -707,7 +749,7 @@ static struct platform_driver dsps_usbss_driver = {
.driver = {
.name = "musb-dsps",
.pm = &dsps_pm_ops,
.of_match_table = musb_dsps_of_match,
.of_match_table = of_match_ptr(musb_dsps_of_match),
},
.id_table = musb_dsps_id_table,
};