[linux-sunxi] Re: [PATCH 12/15] ARM: dts: sun4i: Enable USB DRC on Chuwi V7 CW0825

[Maxime Ripard]

On Tue, Mar 10, 2015 at 04:23:09PM +0100, Hans de Goede wrote:
> Hi,
> 
> On 03/10/2015 04:07 PM, Maxime Ripard wrote:
> >Hi Hans,
> >
> >On Mon, Mar 09, 2015 at 09:40:25PM +0100, Hans de Goede wrote:
> >>Enable the otg/drc usb controller on the Chuwi V7 CW0825 tablet.
> >>
> >>Signed-off-by: Hans de Goede <hdego...@redhat.com>
> >>---
> >>  arch/arm/boot/dts/sun4i-a10-chuwi-v7-cw0825.dts | 31 
> >> +++++++++++++++++++++++++
> >>  1 file changed, 31 insertions(+)
> >>
> >>diff --git a/arch/arm/boot/dts/sun4i-a10-chuwi-v7-cw0825.dts 
> >>b/arch/arm/boot/dts/sun4i-a10-chuwi-v7-cw0825.dts
> >>index 97fca89..034396c 100644
> >>--- a/arch/arm/boot/dts/sun4i-a10-chuwi-v7-cw0825.dts
> >>+++ b/arch/arm/boot/dts/sun4i-a10-chuwi-v7-cw0825.dts
> >>@@ -111,6 +111,26 @@
> >>    status = "okay";
> >>  };
> >>
> >>+&pio {
> >>+   usb0_id_detect_pin: usb0_id_detect_pin@0 {
> >>+           allwinner,pins = "PH4";
> >>+           allwinner,function = "gpio_in";
> >>+           allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> >>+           allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
> >>+   };
> >>+
> >>+   usb0_vbus_detect_pin: usb0_vbus_detect_pin@0 {
> >>+           allwinner,pins = "PH5";
> >>+           allwinner,function = "gpio_in";
> >>+           allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> >>+           allwinner,pull = <SUN4I_PINCTRL_PULL_DOWN>;
> >>+   };
> >>+};
> >>+
> >>+&reg_usb0_vbus {
> >>+   status = "okay";
> >>+};
> >>+
> >>  &reg_usb2_vbus {
> >>    status = "okay";
> >>  };
> >>@@ -121,7 +141,18 @@
> >>    status = "okay";
> >>  };
> >>
> >>+&usb_otg {
> >>+   pinctrl-names = "default";
> >>+   pinctrl-0 = <&usb0_id_detect_pin
> >>+                &usb0_vbus_detect_pin>;
> >>+   id_det-gpio = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */
> >>+   vbus_det-gpio = <&pio 7 5 GPIO_ACTIVE_HIGH>; /* PH5 */
> >>+   dr_mode = "otg";
> >
> >Is there a reason to not put that in the DTSI?
> 
> This is not in the dtsi because it is board specific.
> 
> >All the users seem to be wiring it as OTG.
> 
> Sofar I've only enabled the otg on a handful of boards,
> the otg on the Mele-M9 for example is connected to a usb->sata
> bridge and as such should be brought up in host only mode.
> 
> And on the wobo-i5 (which I still need to create a dts file for)
> the otg is connected to an usb wifi module.

Ok, that seems like a good reason :)

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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