From: andrew@lunn•ch (Andrew Lunn)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 3/7] drivers: gpio: Add support for GPIOs over Moxtet bus
Date: Thu, 9 Aug 2018 04:57:48 +0200 [thread overview]
Message-ID: <20180809025748.GD6884@lunn.ch> (raw)
In-Reply-To: <20180809022037.12001-4-marek.behun@nic.cz>
> +++ b/Documentation/devicetree/bindings/gpio/gpio-moxtet.txt
> @@ -0,0 +1,31 @@
> +Turris Mox Moxtet GPIO expander
> +
> +Required properties:
> + - compatible : Should be "cznic,moxtet-gpio".
> + - gpio-controller : Marks the device node as a GPIO controller.
> + - #gpio-cells : Should be two. For consumer use see gpio.txt.
> + - moxtet,input-mask : Bitmask. Those bits which correspond to input GPIOs
> + when read from Moxtet bus should be set here.
> + For example if bit 0 and bit 3 are input GPIO bits,
> + this should be set to 0x9.
> + Since there are only 4 input bits, 0xf is max value.
> + - moxtet,output-mask : Bitmask. Those bits which correspond to output GPIOs
> + when written to Moxtet bus should be set here.
> + For example if bit 1 and bit 6 are output GPIO bits,
> + this should be set to 0x41.
> + Since there are at most 8 output bits, 0xff is max
> + value.
Lets see what Rob says, but i don't know if it should be so generic.
The SFP module probably has GPO's for tx-disable and rate-select, and
GPI for mod-def0, LOS. So you can have a compatible for this, and have
the bit masks associated to the compatible string. Don't put the masks
in the device tree.
Andrew
next prev parent reply other threads:[~2018-08-09 2:57 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-09 2:20 [PATCH v2 0/7] Add support for the Turris Mox router Marek Behún
2018-08-09 2:20 ` [PATCH v2 1/7] pinctrl: armada-37xx: Correct mpp definitions Marek Behún
2018-08-09 2:20 ` [PATCH v2 2/7] drivers: mfd: Add support for Moxtet bus Marek Behún
2018-08-09 2:20 ` [PATCH v2 3/7] drivers: gpio: Add support for GPIOs over " Marek Behún
2018-08-09 2:49 ` Andrew Lunn
2018-08-09 2:57 ` Andrew Lunn [this message]
2018-08-09 2:20 ` [PATCH v2 4/7] watchdog: Add support for Armada 37xx CPU watchdog Marek Behún
2018-08-10 8:53 ` Miquel Raynal
2018-08-09 2:20 ` [PATCH v2 5/7] arm64: dts: marvell: armada-37xx: add nodes to support watchdog Marek Behún
2018-08-10 9:02 ` Miquel Raynal
2018-08-09 2:20 ` [PATCH v2 6/7] net: mvneta: Don't use GRO on Armada 3720 Marek Behún
2018-08-09 2:20 ` [PATCH v2 7/7] ARM64: dts: marvell: Add DTS file for Turris Mox Marek Behún
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