From: Yash Shah <yash.shah@sifive.com>
To: "linus.walleij@linaro.org" <linus.walleij@linaro.org>,
"bgolaszewski@baylibre.com" <bgolaszewski@baylibre.com>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"palmer@dabbelt.com" <palmer@dabbelt.com>,
"Paul Walmsley ( Sifive)" <paul.walmsley@sifive.com>
Cc: "aou@eecs.berkeley.edu" <aou@eecs.berkeley.edu>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"jason@lakedaemon.net" <jason@lakedaemon.net>,
"maz@kernel.org" <maz@kernel.org>,
"bmeng.cn@gmail.com" <bmeng.cn@gmail.com>,
"atish.patra@wdc.com" <atish.patra@wdc.com>,
Sagar Kadam <sagar.kadam@sifive.com>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-riscv@lists.infradead.org"
<linux-riscv@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Sachin Ghadi <sachin.ghadi@sifive.com>,
Yash Shah <yash.shah@sifive.com>
Subject: [PATCH 2/4] gpio: sifive: Add DT documentation for SiFive GPIO
Date: Tue, 12 Nov 2019 12:12:06 +0000 [thread overview]
Message-ID: <1573560684-48104-3-git-send-email-yash.shah@sifive.com> (raw)
In-Reply-To: <1573560684-48104-1-git-send-email-yash.shah@sifive.com>
DT documentation for GPIO controller added.
Signed-off-by: Wesley W. Terpstra <wesley@sifive.com>
[Atish: Compatible string update]
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Yash Shah <yash.shah@sifive.com>
---
.../devicetree/bindings/gpio/gpio-sifive.txt | 33 ++++++++++++++++++++++
1 file changed, 33 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-sifive.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-sifive.txt b/Documentation/devicetree/bindings/gpio/gpio-sifive.txt
new file mode 100644
index 0000000..d3416d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-sifive.txt
@@ -0,0 +1,33 @@
+SiFive GPIO controller bindings
+
+Required properties:
+- compatible: Should be "sifive,<chip>-gpio" and "sifive,gpio<version>".
+ Supported compatible strings are: "sifive,fu540-c000-gpio" for the SiFive
+ GPIO v0 as integrated onto the SiFive FU540 chip, and "sifive,gpio0" for the
+ SiFive GPIO v0 IP block with no chip integration tweaks.
+ Please refer to sifive-blocks-ip-versioning.txt for details.
+- reg: Physical base address and length of the controller's registers.
+- clocks: Should contain a clock identifier for the GPIO's parent clock.
+- #gpio-cells : Should be 2
+ - The first cell is the GPIO offset number.
+ - The second cell indicates the polarity of the GPIO
+- gpio-controller : Marks the device node as a GPIO controller.
+- interrupt-controller: Marks the device node as an interrupt controller.
+- #interrupt-cells : Should be 2.
+ - The first cell is the GPIO offset number within the GPIO controller.
+ - The second cell is the edge/level to use for interrupt generation.
+- interrupts: Specify the interrupts, one per GPIO
+
+Example:
+
+gpio: gpio@10060000 {
+ compatible = "sifive,fu540-c000-gpio","sifive,gpio0";
+ interrupt-parent = <&plic>;
+ interrupts = <7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22>;
+ reg = <0x0 0x10060000 0x0 0x1000>;
+ clocks = <&tlclk>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+};
--
2.7.4
next prev parent reply other threads:[~2019-11-12 12:12 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-12 12:11 [PATCH 0/4] GPIO & Hierarchy IRQ support for HiFive Unleashed Yash Shah
2019-11-12 12:11 ` [PATCH 1/4] irqchip: sifive: Support hierarchy irq domain Yash Shah
2019-11-12 12:43 ` Marc Zyngier
2019-11-18 7:14 ` Yash Shah
2019-11-12 12:12 ` Yash Shah [this message]
2019-11-18 16:53 ` [PATCH 2/4] gpio: sifive: Add DT documentation for SiFive GPIO Rob Herring
2019-11-12 12:12 ` [PATCH 3/4] gpio: sifive: Add GPIO driver for SiFive SoCs Yash Shah
2019-11-12 12:58 ` Marc Zyngier
2019-11-18 7:50 ` Yash Shah
2019-11-13 13:10 ` Bartosz Golaszewski
2019-11-18 10:03 ` Yash Shah
2019-11-18 10:15 ` Bartosz Golaszewski
2019-11-19 15:02 ` Linus Walleij
2019-11-19 16:41 ` Bartosz Golaszewski
2019-11-22 12:28 ` Linus Walleij
2019-11-22 12:39 ` Bartosz Golaszewski
2019-11-25 4:54 ` Yash Shah
2019-11-12 12:12 ` [PATCH 4/4] riscv: dts: Add DT support for SiFive FU540 GPIO driver Yash Shah
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