[alsa-devel] [PATCH 3/3] ASoC: codecs: add driver for max9768 amplifier
Mark Brown
broonie at opensource.wolfsonmicro.com
Fri Jan 27 17:25:01 CET 2012
On Fri, Jan 27, 2012 at 04:10:23PM +0100, Wolfram Sang wrote:
> Mark: Still no DAPM support. We don't have PM on this board, and since I
> couldn't easily figure what is expected from me here, I'd like to leave this
> for people who have real interest in that.
I don't understand what was unclear here...
You should at least use set_bias_level() to manage the shutdown GPIO I
guess.
> +static const struct snd_kcontrol_new max9768_volume[] = {
> + SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
> +};
> +static const struct snd_kcontrol_new max9768_mute[] = {
> + SOC_SINGLE_BOOL_EXT("Mute Switch", 0, max9768_get_gpio, max9768_set_gpio),
> +};
Should be "Playback Switch" to match the volume control - that way
userspace can present a single control to applications.
> +static bool max9768_always_false(struct device *dev, unsigned int reg)
> +{
> + return false;
> +}
This should be the default in regmap for formats that use format_write
(and hence can't read back), please fix in regmap rather than add this.
> + if (pdata) {
> + /* Mute on powerup to avoid clicks */
> + err = gpio_request_one(pdata->mute_gpio, GPIOF_INIT_HIGH, "MAX9768 Mute");
This need to avoid clicks is the reason I was asking for the DAPM stuff.
> + /* Activate chip by releasing shutdown, enables I2C */
> + err = gpio_request_one(pdata->shdn_gpio, GPIOF_INIT_HIGH, "MAX9768 Shutdown");
> + max9768->shdn_gpio = err ?: pdata->shdn_gpio;
Eeew.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 836 bytes
Desc: Digital signature
Url : http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20120127/c3649282/attachment-0001.sig
More information about the Alsa-devel
mailing list