[alsa-devel] [PATCH v2 2/2] ASoC: codecs: Add DA732x codec driver
Adam Thomson
Adam.Thomson at diasemi.com
Wed Jun 6 12:35:54 CEST 2012
On Wed, June 4, 2012 at 15:31, Mark Brown wrote:
> A few small things below, very minor and easy to correct though.
>
> > + { DA732X_REG_STATUS_EXT , 0x00 },
> > + { DA732X_REG_STATUS , 0x00 },
>
> > + { DA732X_REG_MBOX0 , 0x00 },
> > + { DA732X_REG_MBOX1 , 0x00 },
> > + { DA732X_REG_MBOX2 , 0x00 },
> > + { DA732X_REG_MBOX_STATUS , 0x00 },
>
> > + { DA732X_REG_ID , 0x00 },
>
> > + { DA732X_REG_DMA_STATUS , 0x00 },
> > + { DA732X_REG_BROWNOUT , 0x00 },
>
> I would be very surprised if some or all of the above regsters aren't
> volatile and therefore shouldn't have default specified.
Correct. Will remove those from the cache.
> > +static int da732x_hpf_set(struct snd_kcontrol *kcontrol,
> > + struct snd_ctl_elem_value *ucontrol)
>
> Why doesn't a standard enum work for this?
This is because the two bits that are required for this are not adjacent in the
register, so we use our own get/set methods to control them.
> > + /* High Pass Filters */
> > + SOC_ENUM_EXT("DAC1 High Pass Filter Mode Switch",
> > + da732x_dac1_hpf_mode_enum, da732x_hpf_get, da732x_hpf_set),
>
> This shouldn't be a Switch, it's an enumeration. Switches are plain
> boolean controls.
Ok, fair point. Will rename accordingly.
> > + SOC_SINGLE("ADC1 Equalizer Switch", DA732X_REG_ADC1_EQ5,
> > + DA732X_EQ_EN_SHIFT, DA732X_EQ_EN_MAX, DA732X_NO_INVERT),
> > + SOC_SINGLE_TLV("ADC1 EQ Band 1 Volume", DA732X_REG_ADC1_EQ12,
> > + DA732X_EQ_BAND1_SHIFT, DA732X_EQ_VOL_VAL_MAX,
> > + DA732X_INVERT, eq_band_pga_tlv),
>
> I'd suggest calling the Switch "ADC1 EQ Switch" for consistency with the
> gains for the bands (or expanding EQ in the gains but that'll make for a
> lot of really long control names).
Again, makes sense. Will update all the ADC & DAC instances to align.
> > + case SND_SOC_DAPM_POST_PMU:
> > + if (w->reg == DA732X_REG_ADC1_PD)
> > + snd_soc_update_bits(codec, DA732X_REG_CLK_EN3,
> > + DA732X_ADCA_BB_CLK_EN,
> > + DA732X_ADCA_BB_CLK_EN);
> > + else
> > + snd_soc_update_bits(codec, DA732X_REG_CLK_EN3,
> > + DA732X_ADCC_BB_CLK_EN,
> > + DA732X_ADCC_BB_CLK_EN);
>
> This reads like it should be a switch statement. The effect will be the
> same but it's a bit clearer.
Ok, don't mind changing it if you think it's clearer.
> > + da732x->regmap = devm_regmap_init_i2c(i2c, &da732x_regmap);
> > + if (IS_ERR(da732x->regmap)) {
> > + ret = PTR_ERR(da732x->regmap);
> > + dev_err(&i2c->dev, "Failed to initialize regmap\n");
> > + goto err;
> > + }
> > +
> > + ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_da732x,
> > + da732x_dai, ARRAY_SIZE(da732x_dai));
>
> The register cache defaults make it look like there's a device ID
> (or possibly chip revision?) register - it'd be good practice to read it
> here and either verify that it has the expected value or log it
> depending on which it is.
Is revision information. Will log this.
> > +static const struct i2c_device_id da732x_i2c_id[] = {
> > + { "da732x", 0},
> > + { }
> > +};
> > +MODULE_DEVICE_TABLE(i2c, da732x_i2c_id);
>
> Good practice would be to enumerate all the device IDs (so users can
> just register devices) but it doesn't really matter.
For now will stick with this.
More information about the Alsa-devel
mailing list