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From: Paul Cercueil <paul@crapouillou.net>
To: "Thierry Reding" <thierry.reding@gmail.com>,
	"Daniel Lezcano" <daniel.lezcano@linaro.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Ralf Baechle" <ralf@linux-mips.org>,
	"Paul Burton" <paul.burton@mips.com>,
	"James Hogan" <jhogan@kernel.org>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Mathieu Malaterre <malat@debian.org>,
	od@zcrc.me, linux-pwm@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-watchdog@vger.kernel.org, linux-mips@vger.kernel.org,
	linux-doc@vger.kernel.org, linux-clk@vger.kernel.org,
	Paul Cercueil <paul@crapouillou.net>
Subject: [PATCH v10 23/27] MIPS: CI20: Reduce system timer and clocksource to 3 MHz
Date: Sat,  2 Mar 2019 20:34:09 -0300	[thread overview]
Message-ID: <20190302233413.14813-24-paul@crapouillou.net> (raw)
In-Reply-To: <20190302233413.14813-1-paul@crapouillou.net>

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

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: 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.

 arch/mips/boot/dts/ingenic/ci20.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts
index 4f7b1fa31cf5..30b01cfaaf5a 100644
--- a/arch/mips/boot/dts/ingenic/ci20.dts
+++ b/arch/mips/boot/dts/ingenic/ci20.dts
@@ -238,3 +238,9 @@
 		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>;
+};
-- 
2.11.0


  parent reply	other threads:[~2019-03-02 23:36 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-02 23:33 [5.2][PATCH v10 00/27] Ingenic TCU patchset Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 01/27] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 02/27] doc: Add doc for the Ingenic TCU hardware Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 03/27] dt-bindings: Add doc for the Ingenic TCU drivers Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 04/27] clocksource: Add a new timer-ingenic driver Paul Cercueil
2019-03-04 12:22   ` Thierry Reding
2019-03-04 18:13     ` Paul Cercueil
2019-03-08 10:22       ` Thierry Reding
2019-03-11 20:52         ` Paul Cercueil
2019-03-05  3:15   ` kbuild test robot
2019-03-05  3:15     ` kbuild test robot
2019-03-02 23:33 ` [PATCH v10 05/27] clocksource: Add driver for the Ingenic JZ47xx OST Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 06/27] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 07/27] watchdog: jz4740: Use WDT clock provided by TCU driver Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 08/27] watchdog: jz4740: Use regmap " Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 09/27] watchdog: jz4740: Avoid starting watchdog in set_timeout Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 10/27] watchdog: jz4740: Drop dependency on MACH_JZ47xx, use COMPILE_TEST Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 11/27] pwm: jz4740: Apply configuration atomically Paul Cercueil
2019-03-04 11:59   ` Thierry Reding
2019-03-02 23:33 ` [PATCH v10 12/27] pwm: jz4740: Use regmap from TCU driver Paul Cercueil
2019-03-04 12:24   ` Thierry Reding
2019-03-02 23:33 ` [PATCH v10 13/27] pwm: jz4740: Use clocks " Paul Cercueil
2019-03-04 12:30   ` Thierry Reding
2019-03-04 18:18     ` Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 14/27] pwm: jz4740: Improve algorithm of clock calculation Paul Cercueil
2019-03-04 12:33   ` Thierry Reding
2019-03-02 23:34 ` [PATCH v10 15/27] pwm: jz4740: Allow selection of PWM channels 0 and 1 Paul Cercueil
2019-03-04 12:34   ` Thierry Reding
2019-03-02 23:34 ` [PATCH v10 16/27] pwm: jz4740: Drop dependency on MACH_INGENIC, use COMPILE_TEST Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 17/27] pwm: jz4740: Remove unused devicetree compatible strings Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 18/27] clk: jz4740: Add TCU clock Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 19/27] MIPS: Kconfig: Select TCU timer driver when MACH_INGENIC is set Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 20/27] MIPS: jz4740: Add DTS nodes for the TCU drivers Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 21/27] MIPS: qi_lb60: Move PWM devices to devicetree Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 22/27] MIPS: qi_lb60: Reduce system timer and clocksource to 750 kHz Paul Cercueil
2019-03-02 23:34 ` Paul Cercueil [this message]
2019-03-02 23:34 ` [PATCH v10 24/27] MIPS: CI20: defconfig: enable OST driver Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 25/27] MIPS: GCW0: Reduce system timer and clocksource to 750 kHz Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 26/27] MIPS: GCW0: defconfig: Enable OST, watchdog, PWM drivers Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 27/27] MIPS: jz4740: Drop obsolete code Paul Cercueil

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