On Thu, May 31, 2012 at 03:18:01PM +0100, Adam Thomson wrote:

This patch adds support for the Dialog DA732x audio codec.

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.

+static int da732x_hpf_set(struct snd_kcontrol *kcontrol,

• 	  struct snd_ctl_elem_value *ucontrol)
  

Why doesn't a standard enum work for this?

• /* 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.

• 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).

• 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.

• 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.

+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.