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From: Paul Cercueil <paul@crapouillou.net>
To: Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Ralf Baechle <ralf@linux-mips.org>,
	Paul Burton <paul.burton@mips.com>,
	James Hogan <jhogan@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>,
	Jason Cooper <jason@lakedaemon.net>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Lee Jones <lee.jones@linaro.org>
Cc: Mathieu Malaterre <malat@debian.org>,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	linux-mips@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-clk@vger.kernel.org, od@zcrc.me,
	Paul Cercueil <paul@crapouillou.net>
Subject: [PATCH v12 11/13] MIPS: CI20: Reduce system timer and clocksource to 3 MHz
Date: Tue, 21 May 2019 16:51:39 +0200
Message-ID: <20190521145141.9813-12-paul@crapouillou.net> (raw)
In-Reply-To: <20190521145141.9813-1-paul@crapouillou.net>

The default clock (48 MHz) is too fast for the system timer.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---

Notes:
    v5: New patch
    
    v6: Set also the rate for the clocksource channel's clock
    
    v7: No change
    
    v8: No change
    
    v9: Don't configure clock timer1, as the OS Timer is used as
    	clocksource on this SoC
    
    v10: Revert back to v8 bahaviour. Let the user choose what
    	 clocksource should be used.
    
    v11-v12: No change

 arch/mips/boot/dts/ingenic/ci20.dts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts
index 4f7b1fa31cf5..2e9952311ecd 100644
--- a/arch/mips/boot/dts/ingenic/ci20.dts
+++ b/arch/mips/boot/dts/ingenic/ci20.dts
@@ -2,6 +2,7 @@
 /dts-v1/;
 
 #include "jz4780.dtsi"
+#include <dt-bindings/clock/ingenic,tcu.h>
 #include <dt-bindings/gpio/gpio.h>
 
 / {
@@ -238,3 +239,9 @@
 		bias-disable;
 	};
 };
+
+&tcu {
+	/* 3 MHz for the system timer and clocksource */
+	assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>;
+	assigned-clock-rates = <3000000>, <3000000>;
+};
-- 
2.21.0.593.g511ec345e18


  parent reply index

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-21 14:51 Ingenic Timer/Counter Unit (TCU) patchset v12 Paul Cercueil
2019-05-21 14:51 ` [PATCH v12 01/13] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2019-05-21 14:51 ` [PATCH v12 02/13] doc: Add doc for the Ingenic TCU hardware Paul Cercueil
2019-05-21 14:51 ` [PATCH v12 03/13] dt-bindings: Add doc for the Ingenic TCU drivers Paul Cercueil
2019-05-24 20:21   ` Rob Herring
2019-05-25 19:13     ` Paul Cercueil
2019-06-11 14:57       ` Rob Herring
2019-05-21 14:51 ` [PATCH v12 04/13] mfd: Add Ingenic TCU driver Paul Cercueil
2019-06-22 12:21   ` Paul Cercueil
2019-06-26 13:18   ` Lee Jones
2019-06-26 13:55     ` Paul Cercueil
2019-06-27  6:58       ` Lee Jones
2019-06-27  8:49         ` Paul Cercueil
2019-06-27  9:01           ` Lee Jones
2019-06-27  9:19             ` Paul Cercueil
2019-05-21 14:51 ` [PATCH v12 05/13] clk: ingenic: Add driver for the TCU clocks Paul Cercueil
2019-06-07 21:28   ` Stephen Boyd
2019-06-07 21:59     ` Paul Cercueil
2019-06-07 22:50       ` Stephen Boyd
2019-05-21 14:51 ` [PATCH v12 06/13] irqchip: Add irq-ingenic-tcu driver Paul Cercueil
2019-06-22 12:22   ` Paul Cercueil
2019-05-21 14:51 ` [PATCH v12 07/13] clocksource: Add a new timer-ingenic driver Paul Cercueil
2019-06-22 12:23   ` Paul Cercueil
2019-05-21 14:51 ` [PATCH v12 08/13] clk: jz4740: Add TCU clock Paul Cercueil
2019-05-21 14:51 ` [PATCH v12 09/13] MIPS: jz4740: Add DTS nodes for the TCU drivers Paul Cercueil
2019-05-22  9:21   ` Mathieu Malaterre
2019-05-22 11:15     ` Paul Cercueil
2019-05-21 14:51 ` [PATCH v12 10/13] MIPS: qi_lb60: Reduce system timer and clocksource to 750 kHz Paul Cercueil
2019-05-21 14:51 ` Paul Cercueil [this message]
2019-05-21 14:51 ` [PATCH v12 12/13] MIPS: GCW0: " Paul Cercueil
2019-05-21 14:51 ` [PATCH v12 13/13] MIPS: jz4740: Drop obsolete code Paul Cercueil
2019-05-27 11:39 ` Ingenic Timer/Counter Unit (TCU) patchset v12 Mathieu Malaterre

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