linux-kernel - Re: [PATCH v5 2/2] leds: lm3697: Introduce the lm3697 driver

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Message-ID: <20180824100549.GC4045@amd>
Date:   Fri, 24 Aug 2018 12:05:49 +0200
From:   Pavel Machek <pavel@....cz>
To:     Dan Murphy <dmurphy@...com>
Cc:     robh+dt@...nel.org, jacek.anaszewski@...il.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-leds@...r.kernel.org
Subject: Re: [PATCH v5 2/2] leds: lm3697: Introduce the lm3697 driver

Hi!

> +/**
> + * struct lm3697 -
> + * @enable_gpio - Hardware enable gpio
> + * @regulator - LED supply regulator pointer
> + * @client - Pointer to the I2C client
> + * @regmap - Devices register map
> + * @dev - Pointer to the devices device struct
> + * @lock - Lock for reading/writing the device
> + * @leds - Array of LED strings.
> + */

extra .

> +	ret = regmap_write(led->priv->regmap, brt_msb_reg, brt_val);
> +	if (ret) {
> +		dev_err(&led->priv->client->dev, "Cannot write MSB\n");
> +		goto out;
> +	}
> +out:

I'd avoid this goto.

> +static int lm3697_set_control_bank(struct lm3697 *priv)
> +{
> +	u8 control_bank_config = 0;
> +	struct lm3697_led *led;
> +	int ret, i;
> +
> +	led = &priv->leds[0];
> +	if (led->control_bank == LM3697_CONTROL_A)
> +		led = &priv->leds[1];

I'd expect CONTROL_A to correspond to leds[0]...?

> +	for (i = 0; i < LM3697_MAX_LED_STRINGS; i++) {
> +		if (led->hvled_strings[i] == LM3697_HVLED_ASSIGNMENT)
> +			control_bank_config |= 1 << i;
> +	}

Extra {}s.

> +	priv->regulator = devm_regulator_get(&priv->client->dev, "vled");
> +	if (IS_ERR(priv->regulator))
> +		priv->regulator = NULL;

If vled regulator is specified in dt and _get fails, is it worth a
warning?

									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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