From: "Andrew Jeffery" <andrew@aj.id.au>
To: Hongwei Zhang <hongweiz@ami.com>,
Linus Walleij <linus.walleij@linaro.org>,
Joel Stanley <joel@jms.id.au>,
devicetree@vger.kernel.org
Cc: Rob Herring <robh+dt@kernel.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org
Subject: Re: [v6 1/2] dt-bindings: gpio: aspeed: Add SGPIO support
Date: Wed, 31 Jul 2019 09:28:49 +0930 [thread overview]
Message-ID: <f22b671a-2968-41cb-b158-372663fa6843@www.fastmail.com> (raw)
In-Reply-To: <1564500268-2627-2-git-send-email-hongweiz@ami.com>
On Wed, 31 Jul 2019, at 00:55, Hongwei Zhang wrote:
> Add bindings to support SGPIO on AST2400 or AST2500.
>
> Signed-off-by: Hongwei Zhang <hongweiz@ami.com>
> ---
> .../devicetree/bindings/gpio/sgpio-aspeed.txt | 55 ++++++++++++++++++++++
> 1 file changed, 55 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/gpio/sgpio-aspeed.txt
>
> diff --git a/Documentation/devicetree/bindings/gpio/sgpio-aspeed.txt
> b/Documentation/devicetree/bindings/gpio/sgpio-aspeed.txt
> new file mode 100644
> index 0000000..f9ed438
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/sgpio-aspeed.txt
> @@ -0,0 +1,55 @@
> +Aspeed SGPIO controller Device Tree Bindings
> +-------------------------------------------
> +
> +This SGPIO controller is for ASPEED AST2500 SoC, it supports up to 80
> full
> +featured Serial GPIOs. Each of the Serial GPIO pins can be programmed
> to
> +support the following options:
> +- Support interrupt option for each input port and various interrupt
> + sensitivity option (level-high, level-low, edge-high, edge-low)
> +- Support reset tolerance option for each output port
> +- Directly connected to APB bus and its shift clock is from APB bus
> clock
> + divided by a programmable value.
> +- Co-work with external signal-chained TTL components (74LV165/74LV595)
> +
> +
> +Required properties:
> +
> +- compatible : Either "aspeed,ast2400-sgpio" or "aspeed,ast2500-sgpio"
> +
> +- #gpio-cells : Should be two
> + - First cell is the GPIO line number
> + - Second cell is used to specify optional
> + parameters (unused)
> +
> +- reg : Address and length of the register set for the device
> +- gpio-controller : Marks the device node as a GPIO controller
> +- interrupts : Interrupt specifier (see interrupt bindings for
> + details)
> +
> +- interrupt-controller : Mark the GPIO controller as an
> interrupt-controller
> +
> +- ngpios : number of GPIO pins to serialise.
> + (should be multiple of 8, up to 80 pins)
> +
> +- clocks : A phandle to the APB clock for SGPM clock
> division
> +
> +- bus-frequency : SGPM CLK frequency
> +
> +
> +The sgpio and interrupt properties are further described in their
> respective bindings documentation:
> +
> +- Documentation/devicetree/bindings/sgpio/gpio.txt
This isn't a file? This one is (s/sgpio/gpio/):
Documentation/devicetree/bindings/gpio/gpio.txt
I assume this was the result of a stray search/replace?
With that fixed you can add: Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Andrew
> +- Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
> +
> + Example:
> + sgpio: sgpio@1e780200 {
> + #gpio-cells = <2>;
> + compatible = "aspeed,ast2500-sgpio";
> + gpio-controller;
> + interrupts = <40>;
> + reg = <0x1e780200 0x0100>;
> + clocks = <&syscon ASPEED_CLK_APB>;
> + interrupt-controller;
> + ngpios = <8>;
> + bus-frequency = <12000000>;
> + };
> --
> 2.7.4
>
>
prev parent reply other threads:[~2019-07-30 23:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 15:24 [v6 0/2] gpio: aspeed: Add SGPIO driver Hongwei Zhang
2019-07-30 15:24 ` [v6 1/2] dt-bindings: gpio: aspeed: Add SGPIO support Hongwei Zhang
2019-07-30 23:58 ` Andrew Jeffery [this message]
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