linux-kernel - Re: [PATCH v2 02/10] mfd: wcd9335: add support to wcd9335 core

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Date:   Wed, 1 Aug 2018 09:57:05 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Vinod <vkoul@...nel.org>
Cc:     lee.jones@...aro.org, robh+dt@...nel.org, broonie@...nel.org,
        mark.rutland@....com, lgirdwood@...il.com, tiwai@...e.com,
        bgoswami@...eaurora.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [PATCH v2 02/10] mfd: wcd9335: add support to wcd9335 core

Thanks for reviewing,

On 30/07/18 05:12, Vinod wrote:
> On 27-07-18, 13:17, Srinivas Kandagatla wrote:
>> +obj-$(CONFIG_MFD_WCD9335)	+= wcd9335.o
>> +wcd9335-objs			:= wcd9335-core.o
>> +
> 
> no slimbus objs?
> 
Yep, I will try to tidy this up a bit in next version.
>> +static int wcd9335_bring_up(struct wcd9335 *wcd)
>> +{
>> +	struct regmap *rm = wcd->regmap;
>> +	int val, byte0;
>> +	int ret = 0;
>> +
>> +	regmap_read(rm, WCD9335_CHIP_TIER_CTRL_EFUSE_VAL_OUT0, &val);
>> +	regmap_read(rm, WCD9335_CHIP_TIER_CTRL_CHIP_ID_BYTE0, &byte0);
>> +
>> +	if ((val < 0) || (byte0 < 0)) {
>> +		dev_err(wcd->dev, "wcd9335 codec version detection fail!\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	if (byte0 == 0x1) {
>> +		dev_info(wcd->dev, "wcd9335 codec version is v2.0\n");
>> +		wcd->version = WCD9335_VERSION_2_0;
>> +		regmap_write(rm, WCD9335_CODEC_RPM_RST_CTL, 0x01);
>> +		regmap_write(rm, WCD9335_SIDO_SIDO_TEST_2, 0x00);
>> +		regmap_write(rm, WCD9335_SIDO_SIDO_CCL_8, 0x6F);
>> +		regmap_write(rm, WCD9335_BIAS_VBG_FINE_ADJ, 0x65);
>> +		regmap_write(rm, WCD9335_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x5);
>> +		regmap_write(rm, WCD9335_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x7);
>> +		regmap_write(rm, WCD9335_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x3);
>> +		regmap_write(rm, WCD9335_CODEC_RPM_RST_CTL, 0x3);
>> +	} else {
>> +		dev_err(wcd->dev, "wcd9335 codec version not supported\n");
>> +		ret = -EINVAL;
>> +	}
>> +
>> +	return ret;
> 
> we can do return 0 and remove the variable as it is not used anywhere
> else.
Yes, it makes sense!


Thanks,
srini