On Sat, 16 Dec 2023 14:50:44 -0300
Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx> wrote:
> Add support for Analog Devices AD7091R-2, AD7091R-4, and AD7091R-8
> low power 12-Bit SAR ADCs with SPI interface.
> Extend ad7091r-base driver so it can be used by the AD7091R-8 driver.
>
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
Hi Marcelo
A few trivial things from taking another look.
Jonathan
> diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
> index a30dc587ce45..57355ca157a1 100644
> --- a/drivers/iio/adc/ad7091r-base.c
> +++ b/drivers/iio/adc/ad7091r-base.c
> @@ -6,6 +6,7 @@
> */
>
> #include <linux/bitops.h>
> +#include <linux/bitfield.h>
Not obvious what connection of this header to the code below is...
Wrong patch perhaps?
> #include <linux/iio/events.h>
> #include <linux/iio/iio.h>
> #include <linux/interrupt.h>
> @@ -187,6 +188,12 @@ int ad7091r_probe(struct device *dev, const struct ad7091r_init_info *init_info,
> iio_dev->info = &ad7091r_info;
> iio_dev->modes = INDIO_DIRECT_MODE;
>
> + if (init_info->setup) {
> + ret = init_info->setup(st);
> + if (ret < 0)
> + return ret;
> + }
> +
> if (irq) {
> st->chip_info = &init_info->irq_info;
> ret = regmap_update_bits(st->map, AD7091R_REG_CONF,
> diff --git a/drivers/iio/adc/ad7091r-base.h b/drivers/iio/adc/ad7091r-base.h
> index 2b4e25e766c8..994505a740b3 100644
> --- a/drivers/iio/adc/ad7091r-base.h
> +++ b/drivers/iio/adc/ad7091r-base.h
> @@ -45,6 +45,8 @@
> .scan_type.realbits = bits, \
> }
>
> +#include <linux/gpio/consumer.h>
> +
struct gpio_desc;
and drop the include which only provides an opaque definition anyway.
> struct device;
>
> enum ad7091r_mode {
> @@ -56,10 +58,14 @@ enum ad7091r_mode {
> struct ad7091r_state {
> struct device *dev;
> struct regmap *map;
> + struct gpio_desc *convst_gpio;
> + struct gpio_desc *reset_gpio;
> struct regulator *vref;
> const struct ad7091r_chip_info *chip_info;
> enum ad7091r_mode mode;
> struct mutex lock; /*lock to prevent concurent reads */
> + __be16 tx_buf __aligned(IIO_DMA_MINALIGN);
> + __be16 rx_buf;
> };
>
> struct ad7091r_chip_info {
> @@ -77,6 +83,7 @@ struct ad7091r_init_info {
> const struct regmap_config *regmap_config;
> void (*init_adc_regmap)(struct ad7091r_state *st,
> const struct regmap_config *regmap_conf);
> + int (*setup)(struct ad7091r_state *st);
> };
>
> extern const struct iio_event_spec ad7091r_events[3];
> diff --git a/drivers/iio/adc/ad7091r8.c b/drivers/iio/adc/ad7091r8.c
> new file mode 100644
> index 000000000000..0a6da47d89c0
> --- /dev/null
> +++ b/drivers/iio/adc/ad7091r8.c
> +static int ad7091r8_gpio_setup(struct ad7091r_state *st)
> +{
> + st->convst_gpio = devm_gpiod_get(st->dev, "adi,conversion-start",
> + GPIOD_OUT_LOW);
> + if (IS_ERR(st->convst_gpio))
> + return dev_err_probe(st->dev, PTR_ERR(st->convst_gpio),
> + "Error getting convst GPIO\n");
> +
> + st->reset_gpio = devm_gpiod_get_optional(st->dev, "reset",
Trivial but looks like a bonus space after the =
> + GPIOD_OUT_HIGH);
> + if (IS_ERR(st->reset_gpio))
> + return dev_err_probe(st->dev, PTR_ERR(st->convst_gpio),
> + "Error on requesting reset GPIO\n");
> +
> + if (st->reset_gpio) {
> + fsleep(20);
> + gpiod_set_value_cansleep(st->reset_gpio, 0);
> + }
> +
> + return 0;
> +}
