RPI kernel 4.19 support

root/target/linux/brcm2708/patches-4.19/0085-ASoC-wm8804-MCLK-configuration-options-32-bit.patch

@@ -0,0 +1,37 @@
+From 4e46ccaf2416b5eab952b40fc38bcc822d47cb18 Mon Sep 17 00:00:00 2001
+From: Daniel Matuschek <info@crazy-audio.com>
+Date: Wed, 15 Jan 2014 21:41:23 +0100
+Subject: [PATCH 085/432] ASoC: wm8804: MCLK configuration options, 32-bit
+
+WM8804 can run with PLL frequencies of 256xfs and 128xfs for most sample
+rates. At 192kHz only 128xfs is supported. The existing driver selects
+128xfs automatically for some lower samples rates. By using an
+additional mclk_div divider, it is now possible to control the
+behaviour. This allows using 256xfs PLL frequency on all sample rates up
+to 96kHz. It should allow lower jitter and better signal quality. The
+behavior has to be controlled by the sound card driver, because some
+sample frequency share the same setting. e.g. 192kHz and 96kHz use
+24.576MHz master clock. The only difference is the MCLK divider.
+
+This also added support for 32bit data.
+
+Signed-off-by: Daniel Matuschek <daniel@matuschek.net>
+---
+ sound/soc/codecs/wm8804.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/sound/soc/codecs/wm8804.c b/sound/soc/codecs/wm8804.c
+index 89f13249966e..813c47766fb4 100644
+--- a/sound/soc/codecs/wm8804.c
++++ b/sound/soc/codecs/wm8804.c
+@@ -550,6 +550,7 @@ static const struct snd_soc_component_driver soc_component_dev_wm8804 = {
+ 	.use_pmdown_time	= 1,
+ 	.endianness		= 1,
+ 	.non_legacy_dai_naming	= 1,
++	.idle_bias_on		= true,
+ };
+ 
+ const struct regmap_config wm8804_regmap_config = {
+-- 
+2.19.1
+