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Date: Thu, 19 Jul 2012 20:18:27 +0530
From: "ABRAHAM, KISHON VIJAY" <kishon@...com>
To: "Gupta, Ajay Kumar" <ajay.gupta@...com>
Cc: "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,
On Thu, Jul 19, 2012 at 6:51 PM, Gupta, Ajay Kumar <ajay.gupta@...com> wrote:
> 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.
Ok.
Thanks
Kishon
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