[PATCH 1/5] ARM: mvebu: specify I2C bus frequency on Armada 370 DB

[Thomas Petazzoni]

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 at 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 at 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";
-- 
1.9.2