On Sat, 17 Mar 2018 11:49:56 -0400
William Breathitt Gray <vilhelm.gray@xxxxxxxxx> wrote:
> The Apex Embedded Systems STX104 series of devices provides 4 TTL
> compatible lines of inputs accessed via a single 4-bit port. Since four
> input lines are acquired on a single port input read, the STX104 GPIO
> driver may improve multiple input reads by utilizing a get_multiple
> callback. This patch implements the stx104_gpio_get_multiple function
> which serves as the respective get_multiple callback.
>
> Cc: Jonathan Cameron <jic23@xxxxxxxxxx>
> Cc: Hartmut Knaack <knaack.h@xxxxxx>
> Cc: Lars-Peter Clausen <lars@xxxxxxxxxx>
> Cc: Peter Meerwald-Stadler <pmeerw@xxxxxxxxxx>
> Signed-off-by: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
This one is simple so applied to the togreg branch of iio.git and pushed
out as testing for the autobuilders to play with it.
Thanks,
Jonathan
> ---
> drivers/iio/adc/stx104.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
> index 17b021f33180..0662ca199eb0 100644
> --- a/drivers/iio/adc/stx104.c
> +++ b/drivers/iio/adc/stx104.c
> @@ -233,6 +233,16 @@ static int stx104_gpio_get(struct gpio_chip *chip, unsigned int offset)
> return !!(inb(stx104gpio->base) & BIT(offset));
> }
>
> +static int stx104_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
> + unsigned long *bits)
> +{
> + struct stx104_gpio *const stx104gpio = gpiochip_get_data(chip);
> +
> + *bits = inb(stx104gpio->base);
> +
> + return 0;
> +}
> +
> static void stx104_gpio_set(struct gpio_chip *chip, unsigned int offset,
> int value)
> {
> @@ -342,6 +352,7 @@ static int stx104_probe(struct device *dev, unsigned int id)
> stx104gpio->chip.direction_input = stx104_gpio_direction_input;
> stx104gpio->chip.direction_output = stx104_gpio_direction_output;
> stx104gpio->chip.get = stx104_gpio_get;
> + stx104gpio->chip.get_multiple = stx104_gpio_get_multiple;
> stx104gpio->chip.set = stx104_gpio_set;
> stx104gpio->chip.set_multiple = stx104_gpio_set_multiple;
> stx104gpio->base = base[id] + 3;
--
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