bcm27xx: add linux 5.4 support

Tested on bcm2710 (Raspberry Pi 3B).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0450-ASoC-pcm512x-Fix-unbalanced-regulator-enable-call-in.patch b/target/linux/bcm27xx/patches-5.4/950-0450-ASoC-pcm512x-Fix-unbalanced-regulator-enable-call-in.patch
new file mode 100644
index 0000000000..ae9b9f44fa
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0450-ASoC-pcm512x-Fix-unbalanced-regulator-enable-call-in.patch
@@ -0,0 +1,44 @@
+From 9a536b0cb8f83bd979fe274ef0197ece12a3ed09 Mon Sep 17 00:00:00 2001
+From: Matthias Reichl <hias@horus.com>
+Date: Thu, 20 Feb 2020 21:29:56 +0100
+Subject: [PATCH] ASoC: pcm512x: Fix unbalanced regulator enable call
+ in probe error path
+
+commit ac0a68997935c4acb92eaae5ad8982e0bb432d56 upstream.
+
+When we get a clock error during probe we have to call
+regulator_bulk_disable before bailing out, otherwise we trigger
+a warning in regulator_put.
+
+Fix this by using "goto err" like in the error cases above.
+
+Fixes: 5a3af1293194d ("ASoC: pcm512x: Add PCM512x driver")
+Signed-off-by: Matthias Reichl <hias@horus.com>
+Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
+Link: https://lore.kernel.org/r/20200220202956.29233-1-hias@horus.com
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ sound/soc/codecs/pcm512x.c | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+--- a/sound/soc/codecs/pcm512x.c
++++ b/sound/soc/codecs/pcm512x.c
+@@ -1564,13 +1564,15 @@ int pcm512x_probe(struct device *dev, st
+ 	}
+ 
+ 	pcm512x->sclk = devm_clk_get(dev, NULL);
+-	if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
+-		return -EPROBE_DEFER;
++	if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER) {
++		ret = -EPROBE_DEFER;
++		goto err;
++	}
+ 	if (!IS_ERR(pcm512x->sclk)) {
+ 		ret = clk_prepare_enable(pcm512x->sclk);
+ 		if (ret != 0) {
+ 			dev_err(dev, "Failed to enable SCLK: %d\n", ret);
+-			return ret;
++			goto err;
+ 		}
+ 	}
+