linux-kernel - [PATCH v4 1/5] clocksource/drivers/timer-mediatek: Add system timer bindings

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Message-ID: <1530231446-13760-2-git-send-email-stanley.chu@mediatek.com>
Date:   Fri, 29 Jun 2018 08:17:22 +0800
From:   Stanley Chu <stanley.chu@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Rob Herring" <robh+dt@...nel.org>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <wsd_upstream@...iatek.com>, Stanley Chu <stanley.chu@...iatek.com>
Subject: [PATCH v4 1/5] clocksource/drivers/timer-mediatek: Add system timer bindings

This patch fixes bindings of existed "General Purpose Timer",
and then add bindings of new "System Timer" on Mediatek SoCs.

Signed-off-by: Stanley Chu <stanley.chu@...iatek.com>
---
 .../bindings/timer/mediatek,mtk-timer.txt          |   38 ++++++++++++++++----
 1 file changed, 32 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/timer/mediatek,mtk-timer.txt b/Documentation/devicetree/bindings/timer/mediatek,mtk-timer.txt
index b1fe7e9..605fd8f 100644
--- a/Documentation/devicetree/bindings/timer/mediatek,mtk-timer.txt
+++ b/Documentation/devicetree/bindings/timer/mediatek,mtk-timer.txt
@@ -1,5 +1,14 @@
-Mediatek MT6577, MT6572 and MT6589 Timers
----------------------------------------
+Mediatek Timers
+---------------
+
+Mediatek SoCs have two different timers on different platforms,
+- GPT (General Purpose Timer)
+- SYST (System Timer)
+
+Please bind correct timers in each platforms.
+
+
+** General Purpose Timer (GPT)
 
 Required properties:
 - compatible should contain:
@@ -11,9 +20,8 @@ Required properties:
 	* "mediatek,mt8135-timer" for MT8135 compatible timers
 	* "mediatek,mt8173-timer" for MT8173 compatible timers
 	* "mediatek,mt6577-timer" for MT6577 and all above compatible timers
-- reg: Should contain location and length for timers register.
-- clocks: Clocks driving the timer hardware. This list should include two
-	clocks. The order is system clock and as second clock the RTC clock.
+- reg: Should contain location and length for GPT register.
+- clocks: GPT is drived by system clock.
 
 Examples:
 
@@ -21,5 +29,23 @@ Examples:
 		compatible = "mediatek,mt6577-timer";
 		reg = <0x10008000 0x80>;
 		interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_LOW>;
-		clocks = <&system_clk>, <&rtc_clk>;
+		clocks = <&system_clk>;
+	};
+
+
+** System Timer (SYST)
+
+Required properties:
+- compatible: Should contain
+	* "mediatek,mt6765-timer" for MT6765 compatible timers
+- reg: Should contain the location and length for system timer registers.
+- clocks: System timer is drived by system clock.
+
+Examples:
+
+	systimer@...17000 {
+		compatible = "mediatek,mt6765-timer";
+		reg = <0 0x10017000 0 0x1000>;
+		interrupts = <GIC_SPI 194 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&system_clk>;
 	};
-- 
1.7.9.5