Hi!
> On 8/6/20 1:21 AM, Grant Feng wrote:
> > generate a 5ms low pulse on sdb pin when startup, then the chip
> > becomes more stable in the complex EM environment.
> >
> > Signed-off-by: Grant Feng <von81@xxxxxxx>
> > ---
> > drivers/leds/leds-is31fl319x.c | 12 ++++++++++++
> > 1 file changed, 12 insertions(+)
> >
> > diff --git a/drivers/leds/leds-is31fl319x.c b/drivers/leds/leds-is31fl319x.c
> > index ca6634b8683c..b4f70002cec9 100644
> > --- a/drivers/leds/leds-is31fl319x.c
> > +++ b/drivers/leds/leds-is31fl319x.c
> > @@ -16,6 +16,8 @@
> > #include <linux/of_device.h>
> > #include <linux/regmap.h>
> > #include <linux/slab.h>
> > +#include <linux/delay.h>
> > +#include <linux/gpio/consumer.h>
> > /* register numbers */
> > #define IS31FL319X_SHUTDOWN 0x00
> > @@ -61,6 +63,7 @@
> > struct is31fl319x_chip {
> > const struct is31fl319x_chipdef *cdef;
> > struct i2c_client *client;
> > + struct gpio_desc *sdb_pin;
> > struct regmap *regmap;
> > struct mutex lock;
> > u32 audio_gain_db;
> > @@ -265,6 +268,15 @@ static int is31fl319x_parse_dt(struct device *dev,
> > is31->audio_gain_db = min(is31->audio_gain_db,
> > IS31FL319X_AUDIO_GAIN_DB_MAX);
> > + is31->sdb_pin = gpiod_get(dev, "sdb", GPIOD_ASIS);
>
> Since this is optional maybe use devm_gpiod_get_optional.
>
> If this is required for stability then if the GPIO is not present then the
> parse_dt should return the error.
>
> And use the devm_gpiod_get call. Otherwise you are missing the gpiod_put
> when exiting or removing the driver.
Yep, thanks for the review, I dropped it from for-next.
And yes, this should be in series with device tree change, and we need
Rob 's ack.
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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