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author | Sascha Hauer <s.hauer@pengutronix.de> | 2017-11-28 11:02:14 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2017-11-28 11:06:44 +0100 |
commit | 2e9cce8fb1f577088e2b20ae2f461130e13ad190 (patch) | |
tree | f82ae53e88d36e07608be1b3159da296ed025ef1 /dts/Bindings/sound/rt5663.txt | |
parent | c68d466d263827692aa809e6b34abb90a1cab515 (diff) | |
download | barebox-2e9cce8fb1f577088e2b20ae2f461130e13ad190.tar.gz barebox-2e9cce8fb1f577088e2b20ae2f461130e13ad190.tar.xz |
dts: update to v4.15-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/sound/rt5663.txt')
-rw-r--r-- | dts/Bindings/sound/rt5663.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/dts/Bindings/sound/rt5663.txt b/dts/Bindings/sound/rt5663.txt index ff381718c5..497bcfc58b 100644 --- a/dts/Bindings/sound/rt5663.txt +++ b/dts/Bindings/sound/rt5663.txt @@ -19,6 +19,22 @@ Optional properties: Based on the different PCB layout, add the manual offset value to compensate the DC offset for each L and R channel, and they are different between headphone and headset. +- "realtek,impedance_sensing_num" + The matrix row number of the impedance sensing table. + If the value is 0, it means the impedance sensing is not supported. +- "realtek,impedance_sensing_table" + The matrix rows of the impedance sensing table are consisted by impedance + minimum, impedance maximun, volume, DC offset w/o and w/ mic of each L and + R channel accordingly. Example is shown as following. + < 0 300 7 0xffd160 0xffd1c0 0xff8a10 0xff8ab0 + 301 65535 4 0xffe470 0xffe470 0xffb8e0 0xffb8e0> + The first and second column are defined for the impedance range. If the + detected impedance value is in the range, then the volume value of the + third column will be set to codec. In our codec design, each volume value + should compensate different DC offset to avoid the pop sound, and it is + also different between headphone and headset. In the example, the + "realtek,impedance_sensing_num" is 2. It means that there are 2 ranges of + impedance in the impedance sensing function. Pins on the device (for linking into audio routes) for RT5663: |