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Date: Thu, 19 Jul 2012 13:21:12 +0000
From: "Gupta, Ajay Kumar" <ajay.gupta@...com>
To: "ABRAHAM, KISHON VIJAY" <kishon@...com>,
"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
"rob@...dley.net" <rob@...dley.net>,
"linux@....linux.org.uk" <linux@....linux.org.uk>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"Cousson, Benoit" <b-cousson@...com>,
"Nayak, Rajendra" <rnayak@...com>,
"tony@...mide.com" <tony@...mide.com>,
"devicetree-discuss@...ts.ozlabs.org"
<devicetree-discuss@...ts.ozlabs.org>,
"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"Balbi, Felipe" <balbi@...com>,
"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: RE: [PATCH v4 09/11] drivers: usb: musb: Add device tree support
for omap musb glue
Hi,
> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> ---
> Documentation/devicetree/bindings/usb/omap-usb.txt | 34 ++++++++++++-
> drivers/usb/musb/omap2430.c | 55
> ++++++++++++++++++++
> 2 files changed, 88 insertions(+), 1 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/usb/omap-usb.txt
> b/Documentation/devicetree/bindings/usb/omap-usb.txt
> index 80a28c9..39cdffb 100644
> --- a/Documentation/devicetree/bindings/usb/omap-usb.txt
> +++ b/Documentation/devicetree/bindings/usb/omap-usb.txt
> @@ -1,4 +1,4 @@
> -OMAP USB PHY
> +OMAP USB PHY AND GLUE
>
> OMAP USB2 PHY
>
> @@ -14,3 +14,35 @@ usb2phy@...a0ad080 {
> compatible = "ti,omap-usb2";
> reg = <0x4a0ad080 0x58>;
> };
> +
> +OMAP MUSB GLUE
> + - compatible : Should be "ti,musb-omap2430"
> + - 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@...ab000 {
> + compatible = "ti,musb-omap2430";
> + 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 addbebf..331e477 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>
> @@ -469,8 +470,11 @@ 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;
>
> @@ -500,6 +504,43 @@ 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, "mode", (u32 *)&pdata->mode);
pdata->mode is already read so above should be removed.
Ajay
> + 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 +638,26 @@ 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),
> },
> };
>
> --
> 1.7.5.4
>
> --
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