diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0139-Revert-staging-bcm2835-audio-Drop-DT-dependency.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0139-Revert-staging-bcm2835-audio-Drop-DT-dependency.patch | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0139-Revert-staging-bcm2835-audio-Drop-DT-dependency.patch b/target/linux/bcm27xx/patches-5.4/950-0139-Revert-staging-bcm2835-audio-Drop-DT-dependency.patch new file mode 100644 index 0000000000..09bfb7acad --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0139-Revert-staging-bcm2835-audio-Drop-DT-dependency.patch @@ -0,0 +1,96 @@ +From 6259d03df45a2fd245f6799a83a491edad07c80d Mon Sep 17 00:00:00 2001 +From: popcornmix <popcornmix@gmail.com> +Date: Fri, 15 Mar 2019 21:11:10 +0000 +Subject: [PATCH] Revert "staging: bcm2835-audio: Drop DT dependency" + +This reverts commit b7491a9fca2dc2535b9dc922550a37c5baae9d3d. +--- + .../vc04_services/bcm2835-audio/bcm2835.c | 31 +++++++++++++------ + 1 file changed, 22 insertions(+), 9 deletions(-) + +--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c ++++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c +@@ -6,13 +6,13 @@ + #include <linux/init.h> + #include <linux/slab.h> + #include <linux/module.h> ++#include <linux/of.h> + + #include "bcm2835.h" + + static bool enable_hdmi; + static bool enable_headphones; + static bool enable_compat_alsa = true; +-static int num_channels = MAX_SUBSTREAMS; + + module_param(enable_hdmi, bool, 0444); + MODULE_PARM_DESC(enable_hdmi, "Enables HDMI virtual audio device"); +@@ -21,8 +21,6 @@ MODULE_PARM_DESC(enable_headphones, "Ena + module_param(enable_compat_alsa, bool, 0444); + MODULE_PARM_DESC(enable_compat_alsa, + "Enables ALSA compatibility virtual audio device"); +-module_param(num_channels, int, 0644); +-MODULE_PARM_DESC(num_channels, "Number of audio channels (default: 8)"); + + static void bcm2835_devm_free_vchi_ctx(struct device *dev, void *res) + { +@@ -296,19 +294,28 @@ static int snd_add_child_devices(struct + static int snd_bcm2835_alsa_probe(struct platform_device *pdev) + { + struct device *dev = &pdev->dev; ++ u32 numchans; + int err; + +- if (num_channels <= 0 || num_channels > MAX_SUBSTREAMS) { +- num_channels = MAX_SUBSTREAMS; +- dev_warn(dev, "Illegal num_channels value, will use %u\n", +- num_channels); ++ err = of_property_read_u32(dev->of_node, "brcm,pwm-channels", ++ &numchans); ++ if (err) { ++ dev_err(dev, "Failed to get DT property 'brcm,pwm-channels'"); ++ return err; ++ } ++ ++ if (numchans == 0 || numchans > MAX_SUBSTREAMS) { ++ numchans = MAX_SUBSTREAMS; ++ dev_warn(dev, ++ "Illegal 'brcm,pwm-channels' value, will use %u\n", ++ numchans); + } + + err = bcm2835_devm_add_vchi_ctx(dev); + if (err) + return err; + +- err = snd_add_child_devices(dev, num_channels); ++ err = snd_add_child_devices(dev, numchans); + if (err) + return err; + +@@ -330,6 +337,12 @@ static int snd_bcm2835_alsa_resume(struc + + #endif + ++static const struct of_device_id snd_bcm2835_of_match_table[] = { ++ { .compatible = "brcm,bcm2835-audio",}, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, snd_bcm2835_of_match_table); ++ + static struct platform_driver bcm2835_alsa_driver = { + .probe = snd_bcm2835_alsa_probe, + #ifdef CONFIG_PM +@@ -338,6 +351,7 @@ static struct platform_driver bcm2835_al + #endif + .driver = { + .name = "bcm2835_audio", ++ .of_match_table = snd_bcm2835_of_match_table, + }, + }; + module_platform_driver(bcm2835_alsa_driver); +@@ -345,4 +359,3 @@ module_platform_driver(bcm2835_alsa_driv + MODULE_AUTHOR("Dom Cobley"); + MODULE_DESCRIPTION("Alsa driver for BCM2835 chip"); + MODULE_LICENSE("GPL"); +-MODULE_ALIAS("platform:bcm2835_audio"); |