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From: Paul Cercueil <paul@crapouillou.net>
To: Lee Jones <lee.jones@linaro.org>,
	Jonathan Corbet <corbet@lwn.net>,
	Ralf Baechle <ralf@linux-mips.org>,
	Paul Burton <paul.burton@mips.com>,
	James Hogan <jhogan@kernel.org>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mathieu Malaterre <malat@debian.org>,
	od@zcrc.me, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-mips@vger.kernel.org, linux-clk@vger.kernel.org,
	Paul Cercueil <paul@crapouillou.net>,
	Artur Rojek <contact@artur-rojek.eu>
Subject: [PATCH v14 10/13] MIPS: qi_lb60: Reduce system timer and clocksource to 750 kHz
Date: Mon,  1 Jul 2019 17:14:07 +0200	[thread overview]
Message-ID: <20190701151410.23127-11-paul@crapouillou.net> (raw)
In-Reply-To: <20190701151410.23127-1-paul@crapouillou.net>

The default clock (12 MHz) is too fast for the system timer, which fails
to report time accurately.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Tested-by: Mathieu Malaterre <malat@debian.org>
Tested-by: Artur Rojek <contact@artur-rojek.eu>
---

Notes:
    v5: New patch
    
    v6: Remove ingenic,clocksource-channel property
    
    v7-v14: No change

 arch/mips/boot/dts/ingenic/qi_lb60.dts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/mips/boot/dts/ingenic/qi_lb60.dts b/arch/mips/boot/dts/ingenic/qi_lb60.dts
index 76aaf8982554..01b8c917cb33 100644
--- a/arch/mips/boot/dts/ingenic/qi_lb60.dts
+++ b/arch/mips/boot/dts/ingenic/qi_lb60.dts
@@ -2,6 +2,7 @@
 /dts-v1/;
 
 #include "jz4740.dtsi"
+#include <dt-bindings/clock/ingenic,tcu.h>
 
 / {
 	compatible = "qi,lb60", "ingenic,jz4740";
@@ -31,3 +32,9 @@
 		bias-disable;
 	};
 };
+
+&tcu {
+	/* 750 kHz for the system timer and clocksource */
+	assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>;
+	assigned-clock-rates = <750000>, <750000>;
+};
-- 
2.21.0.593.g511ec345e18


  parent reply	other threads:[~2019-07-01 15:15 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-01 15:13 [PATCH v14 00/13] Ingenic TCU patchset v14 Paul Cercueil
2019-07-01 15:13 ` [PATCH v14 01/13] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2019-07-01 15:13 ` [PATCH v14 02/13] doc: Add doc for the Ingenic TCU hardware Paul Cercueil
2019-07-01 15:14 ` [PATCH v14 03/13] dt-bindings: Add doc for the Ingenic TCU drivers Paul Cercueil
2019-07-01 15:14 ` [PATCH v14 04/13] mfd: Add Ingenic TCU driver Paul Cercueil
2019-07-01 15:14 ` [PATCH v14 05/13] clk: ingenic: Add driver for the TCU clocks Paul Cercueil
2019-07-01 15:14 ` [PATCH v14 06/13] irqchip: Add irq-ingenic-tcu driver Paul Cercueil
2019-07-01 15:14 ` [PATCH v14 07/13] clocksource: Add a new timer-ingenic driver Paul Cercueil
2019-07-01 15:14 ` [PATCH v14 08/13] clk: jz4740: Add TCU clock Paul Cercueil
2019-07-01 15:14 ` [PATCH v14 09/13] MIPS: jz4740: Add DTS nodes for the TCU drivers Paul Cercueil
2019-07-01 15:14 ` Paul Cercueil [this message]
2019-07-01 15:14 ` [PATCH v14 11/13] MIPS: CI20: Reduce system timer and clocksource to 3 MHz Paul Cercueil
2019-07-01 15:14 ` [PATCH v14 12/13] MIPS: GCW0: Reduce system timer and clocksource to 750 kHz Paul Cercueil
2019-07-01 15:14 ` [PATCH v14 13/13] MIPS: jz4740: Drop obsolete code Paul Cercueil

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