Re: [PATCH v4 02/14] mfd: lm3533: Remove driver specific regmap wrappers
From: Svyatoslav Ryhel <hidden>
Date: 2026-06-06 07:22:58
Also in:
dri-devel, linux-devicetree, linux-iio, linux-leds, lkml
сб, 6 черв. 2026 р. о 09:53 Andy Shevchenko [off-list ref] пише:
On Sat, Jun 06, 2026 at 07:57:26AM +0300, Svyatoslav Ryhel wrote:quoted
Remove driver-specific regmap wrappers in favor of using regmap helpers directly.I like the idea of this patch. Nevertheless I have some suggestions below. ...quoted
{ struct lm3533_als *als = iio_priv(indio_dev); u8 reg; - u8 val; + u32 val;Strictly speaking this should be unsigned int. The regmap API use unsigned int.
Yes, though regmap defines only 8 bit to be used so it should not matter
...quoted
static int lm3533_als_set_int_mode(struct iio_dev *indio_dev, int enable) { struct lm3533_als *als = iio_priv(indio_dev); - u8 mask = LM3533_ALS_INT_ENABLE_MASK; - u8 val; int ret; - if (enable) - val = mask; - else - val = 0; - - ret = lm3533_update(als->lm3533, LM3533_REG_ALS_ZONE_INFO, val, mask); + ret = regmap_assign_bits(als->lm3533->regmap, LM3533_REG_ALS_ZONE_INFO, + LM3533_ALS_INT_ENABLE_MASK, enable);In cases like this perhaps leaving mask would be fine and together with
I prefer to remove intermediate variables it the helper allows to directly pass needed value.
struct regmap *map = als->lm3533->regmap;next patch drops lm3533 so there will be als->regmap which IMHO is more logical instead of passing entire lm3533 to child devices.
this be nice one-liner: ret = regmap_assign_bits(map, LM3533_REG_ALS_ZONE_INFO, mask, enable);quoted
if (ret) { dev_err(&indio_dev->dev, "failed to set int mode %d\n", enable);In many cases it won't increase LoC count. ...quoted
extern int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val); -extern int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val); +extern int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u32 *val);quoted
extern int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val); -extern int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val); +extern int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u32 *val);Now they become asymmetrical. Perhaps to replace setters, but be careful about upper bits.
Yes, I have same thoughts. Upper beats should be irrelevant since regmap should use only fist 8 bits but I will be careful, thanks.
-- With Best Regards, Andy Shevchenko