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| author | Stefan Wahren | 2018-12-06 19:28:58 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2018-12-12 11:56:47 +0100 |
| commit | b7491a9fca2dc2535b9dc922550a37c5baae9d3d (patch) | |
| tree | 69e5d175f659ab0fccb00898dbaf6b477f47bd84 /drivers/staging/vc04_services | |
| parent | staging: bcm2835-audio: use module_platform_driver() macro (diff) | |
| download | kernel-qcow2-linux-b7491a9fca2dc2535b9dc922550a37c5baae9d3d.tar.gz kernel-qcow2-linux-b7491a9fca2dc2535b9dc922550a37c5baae9d3d.tar.xz kernel-qcow2-linux-b7491a9fca2dc2535b9dc922550a37c5baae9d3d.zip | |
staging: bcm2835-audio: Drop DT dependency
Just like the bcm2835-video make this a platform driver which is probed
by vchiq. In order to change the number of channels use a module
parameter instead, but use the maximum as default.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/vc04_services')
| -rw-r--r-- | drivers/staging/vc04_services/bcm2835-audio/bcm2835.c | 31 |
1 files changed, 9 insertions, 22 deletions
diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c index 86b921030db7..cf5f80f5ca6b 100644 --- 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"); @@ -21,6 +21,8 @@ MODULE_PARM_DESC(enable_headphones, "Enables Headphones virtual audio device"); 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) { @@ -294,28 +296,19 @@ static int snd_add_child_devices(struct device *device, u32 numchans) static int snd_bcm2835_alsa_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - u32 numchans; int err; - 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); + 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 = bcm2835_devm_add_vchi_ctx(dev); if (err) return err; - err = snd_add_child_devices(dev, numchans); + err = snd_add_child_devices(dev, num_channels); if (err) return err; @@ -337,12 +330,6 @@ static int snd_bcm2835_alsa_resume(struct platform_device *pdev) #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 @@ -351,7 +338,6 @@ static struct platform_driver bcm2835_alsa_driver = { #endif .driver = { .name = "bcm2835_audio", - .of_match_table = snd_bcm2835_of_match_table, }, }; module_platform_driver(bcm2835_alsa_driver); @@ -359,3 +345,4 @@ module_platform_driver(bcm2835_alsa_driver); MODULE_AUTHOR("Dom Cobley"); MODULE_DESCRIPTION("Alsa driver for BCM2835 chip"); MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:bcm2835_audio"); |