From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
To: Nicolas Ferre <nicolas.ferre@atmel.com>, Marek Vasut <marex@denx.de>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Alexandre Belloni <alexandre.belloni@free-electrons.com>
Subject: [PATCH] ARM: dts: at91: ma5d4: properly define crystals frequencies
Date: Wed, 8 Jun 2016 01:31:19 +0200 [thread overview]
Message-ID: <1465342279-9193-1-git-send-email-alexandre.belloni@free-electrons.com> (raw)
The Denx MA5D4 dts doesn't properly define the slow_xtal and main_xtal
frequencies, the PMC then has to fallback to using the RC oscillators whose
precision is not really good.
As both crystals are populated, define their frequencies, see p17 of
http://www.denx-cs.de/sites/all/files/MA5D4.HWM_.002.pdf
Also, remove the obsolete main_clock definition.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
arch/arm/boot/dts/at91-sama5d4_ma5d4.dtsi | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/at91-sama5d4_ma5d4.dtsi b/arch/arm/boot/dts/at91-sama5d4_ma5d4.dtsi
index e7b2109fc85a..99d57131782f 100644
--- a/arch/arm/boot/dts/at91-sama5d4_ma5d4.dtsi
+++ b/arch/arm/boot/dts/at91-sama5d4_ma5d4.dtsi
@@ -20,8 +20,11 @@
};
clocks {
- main_clock: main_clock {
- compatible = "atmel,osc", "fixed-clock";
+ slow_xtal {
+ clock-frequency = <32768>;
+ };
+
+ main_xtal {
clock-frequency = <12000000>;
};
--
2.8.1
next reply other threads:[~2016-06-07 23:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-07 23:31 Alexandre Belloni [this message]
2016-06-07 23:46 ` Marek Vasut
2016-06-10 14:49 ` Alexandre Belloni
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