From: gregory.clement@free-electrons•com (Gregory CLEMENT)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 1/5] ARM: mvebu: specify I2C bus frequency on Armada 370 DB
Date: Fri, 18 Apr 2014 09:47:29 +0200 [thread overview]
Message-ID: <5350D891.4050609@free-electrons.com> (raw)
In-Reply-To: <1397806908-7550-2-git-send-email-thomas.petazzoni@free-electrons.com>
On 18/04/2014 09:41, Thomas Petazzoni wrote:
> In commit 249f3822509b74f8c8d0731aeb7ccea065376c9b ('ARM: mvebu: add
> audio support to Armada 370 DB'), the I2C bus 0 was enabled on the
> Armada 370 DB board, and an I2C codec was described as being connected
> on this bus.
>
> However, this commit forgot to define the I2C bus frequency, which
> leads the i2c-mv64xxx to fail probing, as it cannot calculate the baud
> rate multiplier/divisor to derive the I2C bus frequency from the core
> SoC frequency. It makes audio completely unusable, as the I2C bus is
> not probed, and therefore the audio codec is not probed either.
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons•com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons•com>
> ---
> The audio support was merged in 3.15-rc1, so there's no need to
> backport this change into stable trees. However, it needs to go in the
> 3.15-rc cycle.
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons•com>
> ---
> arch/arm/boot/dts/armada-370-db.dts | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/boot/dts/armada-370-db.dts b/arch/arm/boot/dts/armada-370-db.dts
> index 82f238a..3383c4b 100644
> --- a/arch/arm/boot/dts/armada-370-db.dts
> +++ b/arch/arm/boot/dts/armada-370-db.dts
> @@ -67,6 +67,7 @@
> i2c at 11000 {
> pinctrl-0 = <&i2c0_pins>;
> pinctrl-names = "default";
> + clock-frequency = <100000>;
> status = "okay";
> audio_codec: audio-codec at 4a {
> compatible = "cirrus,cs42l51";
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2014-04-18 7:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-18 7:41 [PATCH 0/5] ARM: mvebu: misc Device Tree fixes and updates Thomas Petazzoni
2014-04-18 7:41 ` [PATCH 1/5] ARM: mvebu: specify I2C bus frequency on Armada 370 DB Thomas Petazzoni
2014-04-18 7:47 ` Gregory CLEMENT [this message]
2014-04-18 7:41 ` [PATCH 2/5] ARM: mvebu: enable the SATA interface on Armada 375 DB Thomas Petazzoni
2014-04-18 7:47 ` Gregory CLEMENT
2014-04-18 7:41 ` [PATCH 3/5] ARM: mvebu: use clocks property for serial ports Thomas Petazzoni
2014-04-18 7:49 ` Gregory CLEMENT
2014-04-18 7:41 ` [PATCH 4/5] ARM: mvebu: remove clock-frequency of serial port Device Tree nodes Thomas Petazzoni
2014-04-18 7:49 ` Gregory CLEMENT
2014-04-18 7:41 ` [PATCH 5/5] ARM: mvebu: don't use clocks property in UART node for Netgear RN2120 Thomas Petazzoni
2014-04-18 7:50 ` Gregory CLEMENT
2014-04-20 19:00 ` [PATCH 0/5] ARM: mvebu: misc Device Tree fixes and updates Jason Cooper
2014-04-26 0:37 ` Jason Cooper
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