Hi, on BCM2835 (Raspberry Pi) the firmware on the VideoCore and Linux on the ARM core share a common pin "space". Depending on the board revision the VideoCore needs to controls some pins, which shouldn't be claimed by Linux on the ARM. What is the right way to exclude control on Linux for those pins in order to avoid possible harmful operations? I tought of this [1] but only for pins. [1] - http://lxr.free-electrons.com/source/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt Regards Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
Excluding pins from Linux control
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
- Subject: Excluding pins from Linux control
- From: Stefan Wahren <stefan.wahren@xxxxxxxx>
- Date: Mon, 27 Feb 2017 19:02:01 +0100 (CET)
- Importance: Medium
- Follow-Ups:
- Re: Excluding pins from Linux control
- From: Linus Walleij
- Re: Excluding pins from Linux control
- Prev by Date: Re: [PATCH 2/7] Documentation: devicetree: bindings: Add RZ/A1 pinctrl binding documentation
- Next by Date: [PATCH fixes v2] pinctrl: Really force states during suspend/resume
- Previous by thread: [PATCH RFT] gpio: exar: Set proper output level in exar_direction_output
- Next by thread: Re: Excluding pins from Linux control
- Index(es):
 |