lkml.org 
[lkml]   [2019]   [Nov]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/4] gpio: sifive: Add DT documentation for SiFive GPIO
Date
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
\
 
 \ /
  Last update: 2019-11-12 13:13    [W:0.110 / U:0.136 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site