From: Fengping yu <fengping.yu@mediatek.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: "fengping.yu" <fengping.yu@mediatek.com>,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
wsd_upstream@mediatek.com
Subject: [PATCH v3 1/2] add dt-binding document for MediaTek Keypad
Date: Sun, 5 Apr 2020 10:01:16 +0800 [thread overview]
Message-ID: <20200405020114.14787-2-fengping.yu@mediatek.com> (raw)
In-Reply-To: <20200405020114.14787-1-fengping.yu@mediatek.com>
From: "fengping.yu" <fengping.yu@mediatek.com>
Signed-off-by: fengping.yu <fengping.yu@mediatek.com>
---
.../devicetree/bindings/input/mtk-kpd.txt | 61 +++++++++++++++++++
1 file changed, 61 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.txt
diff --git a/Documentation/devicetree/bindings/input/mtk-kpd.txt b/Documentation/devicetree/bindings/input/mtk-kpd.txt
new file mode 100644
index 000000000000..8b154a5e2f7d
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/mtk-kpd.txt
@@ -0,0 +1,61 @@
+* Mediatek's Keypad Controller device tree binding
+
+Mediatek's Keypad controller is used to interface a SoC with a matrix-type
+keypad device. The keypad controller supports multiple row and column lines.
+A key can be placed at each intersection of a unique row and a unique column.
+The keypad controller can sense a key-press and key-release and report the
+event using a interrupt to the cpu.
+
+Required properties:
+- compatible should contain:
+ * "mediatek,kp" for common keypad
+ * "mediatek,mt6779-keypad" for specific keypad chip
+
+- reg: The base address of the Keypad register bank.
+
+- interrupts: A single interrupt specifier.
+
+- mediatek,debounce-us: Debounce interval in microseconds, maximum value
+ is 256000 microseconds.
+
+- keypad,num-rows: Number of row lines connected to the keypad controller, it is
+ not equal to PCB rows number, instead you should add required value for each IC.
+
+- keypad,num-columns: Number of column lines connected to the keypad controller,
+ it is not equal to PCB columns number, instead you should add required value
+ for each IC.
+
+- linux,keymap: The keymap for keys as described in the binding document
+ devicetree/bindings/input/matrix-keymap.txt.
+
+- pinctrl: Should specify pin control groups used for this controller.
+ See ../pinctrl/pinctrl-bindings.txt for details.
+
+- clocks: Must contain one entry, for the module clock.
+ See ../clocks/clock-bindings.txt for details.
+
+- clock-names: Names of the clocks listed in clocks property in the same order.
+
+Optional Properties:
+- wakeup-source: use any event on keypad as wakeup event.
+
+Example:
+
+ keypad: kp@10010000 {
+ compatible = "mediatek,kp";
+ reg = <0 0x10010000 0 0x1000>;
+ wakeup-source;
+ interrupts = <GIC_SPI 75 IRQ_TYPE_EDGE_FALLING>;
+ clocks = <&clk26m>;
+ clock-names = "kpd";
+ };
+
+ &keypad {
+ mediatek,debounce-us = <32000>;
+ keypad,num-rows = <8>;
+ keypad,num-columns = <9>;
+ linux,keymap = < MATRIX_KEY(0x00, 0x00, KEY_VOLUMEDOWN) >;
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&kpd_gpios_def_cfg>;
+ };
--
2.18.0
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next prev parent reply other threads:[~2020-04-05 2:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-05 2:01 [PATCH v3] Add support for MediaTek keypad Fengping yu
2020-04-05 2:01 ` Fengping yu [this message]
2020-04-06 15:21 ` [PATCH v3 1/2] add dt-binding document for MediaTek Keypad Yingjoe Chen
2020-04-05 2:01 ` [PATCH v3 2/2] add MediaTek keypad driver Fengping yu
2020-04-06 13:04 ` [PATCH v3] Add support for MediaTek keypad Andy Shevchenko
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