Added device tree support for omap musb driver and updated the
Documentation with device tree binding information.
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
---
Documentation/devicetree/bindings/usb/omap-usb.txt | 33 ++++++++++++
drivers/usb/musb/omap2430.c | 54 ++++++++++++++++++++
2 files changed, 87 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/omap-usb.txt
diff --git a/Documentation/devicetree/bindings/usb/omap-usb.txt b/Documentation/devicetree/bindings/usb/omap-usb.txt
new file mode 100644
index 0000000..29a043e
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/omap-usb.txt
@@ -0,0 +1,33 @@
+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>;
+};
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index f4d9503..d96873b 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -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),
},
};
--
1.7.9.5
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