From mboxrd@z Thu Jan 1 00:00:00 1970 From: Icenowy Zheng Subject: Re: [linux-sunxi] Re: [PATCH] ARM: sun8i: h2+: add support for Banana Pi M2 Zero board Date: Fri, 03 Nov 2017 07:53:17 +0800 Message-ID: References: <20171101093814.19177-1-icenowy@aosc.io> <20171102090248.wnvj7dpphn5uqsut@flea> <8327eaeaa12b99f9962a53c9f02ddd6d@aosc.io> <20171102155003.vp7uve4ypyn4sb6j@flea> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20171102155003.vp7uve4ypyn4sb6j@flea> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Maxime Ripard Cc: Chen-Yu Tsai , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org List-Id: devicetree@vger.kernel.org 在 2017-11-02 23:50，Maxime Ripard 写道： > On Thu, Nov 02, 2017 at 05:07:30PM +0800, Icenowy Zheng wrote: >> > > +&mmc0 { >> > > + pinctrl-names = "default"; >> > > + pinctrl-0 = <&mmc0_pins_a>; >> > > + vmmc-supply = <®_vcc3v3>; >> > > + bus-width = <4>; >> > > + /* >> > > + * In different revisions the board have different card detect >> > > + * configuration. >> > > + */ >> > >> > Which ones? >> >> In the sample batch (1.2V fixed voltage) the card detect is normal >> (PF6 low as inserted), however in the final batch (1.1V/1.3V >> switchable) it's inverted at PF6 (high as inserted). > > Then just use the final version's. > >> > > +&usbphy { >> > > + usb0_id_det-gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */ >> > > + /* USB OTG VBUS is directly connected to 5V without any regulators >> > > */ >> > >> > So it cannot operate in OTG, but it's host only? >> >> It can operate in OTG -- you can power the board via the OTG port, >> as the VBUS is not gated from 5V at all, so 5V power at VBUS will >> power up the board. Yes, it's a bit unsafe, but the board designer >> did it. > > What will provide the 5v in the first place then if a USB device is > connected to the micro-USB connector? There're two micro-USB connectors, one is power-only and another is OTG. The Vbus of these two connectors are connected together, so the external USB device will be powered just by the power input from the power-only USB port. > > Maxime -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html