Hello,

On Wed, Apr 24, 2024 at 04:55:26PM +0100, Bryan O'Donoghue wrote:
> On 24/04/2024 16:29, Xilin Wu via B4 Relay wrote:
> > +#include <linux/i2c.h>
> > +#include <linux/module.h>
> > +#include <linux/mutex.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/pwm.h>
> > +#include <linux/regmap.h>
> > +#include <linux/delay.h>
> > +#include <linux/gpio/consumer.h>
> > +#include <linux/regulator/consumer.h>
> 
> Includes should be alphabetised

Also check if you need them all. (E.g. I wonder about delay.h)

> > +	dev_dbg(priv->pdev, "request regmap_write 0x%x 0x%x\n", reg, val);
> > +	err = regmap_write(priv->regmap, reg, val);
> > +	if (err)
> > +		dev_warn_ratelimited(
> > +			priv->pdev,
> > +			"regmap_write to register 0x%x failed: %pe\n", reg,
> > +			ERR_PTR(err));
> 
> Multi-line should be encapsulated in {}
> 
> if (err) {
> 	stuff
> 	goes here
> }

In my eyes a single state doesn't need {} even when spanning multiple
lines.

> > +	return err;
> > +}

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |