[alsa-devel] [PATCH v2 1/2] ASoC: cs35l36: Add support for Cirrus CS35L36 Amplifier

[Schulman, James]

On Wed, 12 Dec 2018, Charles Keepax wrote:

> On Thu, Dec 06, 2018 at 03:04:46PM -0600, James Schulman wrote:
>> Add driver support for Cirrus Logic CS35L36 boosted
>> speaker amplifier
>>
>> Signed-off-by: James Schulman <james.schulman at cirrus.com>
>> ---
>
> Again just a couple of very minor nit picks from me.
>
>> +static int cs35l36_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
>> +				  unsigned int freq, int dir)
>> +{
>> +	struct snd_soc_component *component = dai->component;
>> +	struct cs35l36_private *cs35l36 =
>> +			snd_soc_component_get_drvdata(component);
>> +	int fs1, fs2, reg;
>> +
>> +	if (freq > CS35L36_FS_NOM_6MHZ) {
>> +		fs1 = CS35L36_FS1_DEFAULT_VAL;
>> +		fs2 = CS35L36_FS2_DEFAULT_VAL;
>> +	} else {
>> +		fs1 = 3 * ((CS35L36_FS_NOM_6MHZ * 4 + freq - 1) / freq) + 4;
>> +		fs2 = 5 * ((CS35L36_FS_NOM_6MHZ * 4 + freq - 1) / freq) + 4;
>> +	}
>> +
>> +	regmap_write(cs35l36->regmap, CS35L36_TESTKEY_CTRL,
>> +			CS35L36_TEST_UNLOCK1);
>> +	regmap_write(cs35l36->regmap, CS35L36_TESTKEY_CTRL,
>> +			CS35L36_TEST_UNLOCK2);
>> +
>> +	regmap_read(cs35l36->regmap, CS35L36_TST_FS_MON0, &reg);
>> +	reg &= ~(CS35L36_FS1_WINDOW_MASK | CS35L36_FS2_WINDOW_MASK);
>> +	reg |= ((fs1 & CS35L36_FS1_WINDOW_MASK) |
>> +		(fs2 << CS35L36_FS2_WINDOW_SHIFT & CS35L36_FS2_WINDOW_MASK));
>> +	regmap_write(cs35l36->regmap, CS35L36_TST_FS_MON0, reg);
>
> This is just open coding update_bits probably better to just use
> update_bits.
>

I did this because it's a register that we didn't want to be visible in 
userspace, but now I realize that just means it's precious. Will add it to 
the precious register list and resubmit.

>> +
>> +	regmap_write(cs35l36->regmap, CS35L36_TESTKEY_CTRL,
>> +			CS35L36_TEST_LOCK1);
>> +	regmap_write(cs35l36->regmap, CS35L36_TESTKEY_CTRL,
>> +			CS35L36_TEST_LOCK2);
>> +	return 0;
>> +}
>> +
>
>> +typedef char CS35L36_MAX_NUM_REGS[__LINE__];
>
> Not sure I am the greatest fan of this, is it perhaps just worth
> combining the tables file and the regular file? Then you don't
> need any fancyness.
>

Ya it's probably not worth trying to get fancy... I'll just nuke the 
tables file.

> Thanks,
> Charles
>