On Tue, Jul 30, 2019 at 01:09:37PM +0100, Thomas Preston wrote:
> Add a debugfs device node which initiates the turn-on diagnostic routine
> feature of the TDA7802 amplifier. The four status registers (one per
> channel) are returned.
>
> Signed-off-by: Thomas Preston <thomas.preston@xxxxxxxxxxxxxxx>
> ---
> Changes since v1:
> - Rename speaker-test to (turn-on) diagnostics
> - Move turn-on diagnostic to debugfs as there is no standard ALSA
> interface for this kind of routine.
>
> sound/soc/codecs/tda7802.c | 186 ++++++++++++++++++++++++++++++++++++-
> 1 file changed, 185 insertions(+), 1 deletion(-)
>
> +static int tda7802_bulk_update(struct regmap *map, struct reg_update *update,
> + size_t update_count)
> +{
> + int i, err;
> +
> + for (i = 0; i < update_count; i++) {
> + err = regmap_update_bits(map, update[i].reg, update[i].mask,
> + update[i].val);
> + if (err < 0)
> + return err;
> + }
> +
> + return i;
> +}
This could probably be removed using regmap_multi_reg_write.
> +static int tda7802_probe(struct snd_soc_component *component)
> +{
> + struct tda7802_priv *tda7802 = snd_soc_component_get_drvdata(component);
> + struct device *dev = &tda7802->i2c->dev;
> + int err;
> +
> + tda7802->debugfs = debugfs_create_dir(dev_name(dev), NULL);
> + if (IS_ERR_OR_NULL(tda7802->debugfs)) {
> + dev_info(dev,
> + "Failed to create debugfs node, err %ld\n",
> + PTR_ERR(tda7802->debugfs));
> + return 0;
> + }
> +
> + mutex_init(&tda7802->diagnostic_mutex);
> + err = debugfs_create_file("diagnostic", 0444, tda7802->debugfs, tda7802,
> + &tda7802_diagnostic_fops);
> + if (err < 0) {
> + dev_err(dev,
> + "debugfs: Failed to create diagnostic node, err %d\n",
> + err);
> + goto cleanup_diagnostic;
> + }
You shouldn't be failing the driver probe if debugfs fails, it
should be purely optional.
Thanks,
Charles
