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

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Date:   Mon, 30 Jul 2018 09:42:23 +0530
From:   Vinod <vkoul@...nel.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.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

On 27-07-18, 13:17, Srinivas Kandagatla wrote:
> +obj-$(CONFIG_MFD_WCD9335)	+= wcd9335.o
> +wcd9335-objs			:= wcd9335-core.o
> +

no slimbus objs?

> +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.

> +static int wcd9335_slim_probe(struct slim_device *slim)
> +{
> +	struct device *dev = &slim->dev;
> +	struct wcd9335 *wcd;
> +	int ret = 0;
> +
> +	/* Interface device */
> +	if (slim->e_addr.dev_index == 0)
> +		return 0;
> +
> +	wcd = devm_kzalloc(dev, sizeof(*wcd), GFP_KERNEL);
> +	if (!wcd)
> +		return	-ENOMEM;
                      ^^
double space

-- 
~Vinod