Hi,
> Am 09.12.2018 um 20:51 schrieb Andreas Kemnade <andr...@kemnade.info>:
>
> Devices might have a separate lna between antenna output of the gps
some nitpicking: the LNA (low noise amplifier) is between the antenna
and the GPS receiver. Therefore:
s/between antenna output of the gps/between antenna input of the gps/
Otherwise fine!
BR and thanks,
Nikolaus
> chip and the antenna which might have a separate supply.
>
> Signed-off-by: Andreas Kemnade <andr...@kemnade.info>
> ---
> Changes in v2:
> - handle lna also if there is no on-off gpio
> - rebase on changed 2/5
>
> drivers/gnss/sirf.c | 26 ++++++++++++++++++++++----
> 1 file changed, 22 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gnss/sirf.c b/drivers/gnss/sirf.c
> index c64369494afb..d339e8ef2508 100644
> --- a/drivers/gnss/sirf.c
> +++ b/drivers/gnss/sirf.c
> @@ -36,6 +36,7 @@ struct sirf_data {
> struct serdev_device *serdev;
> speed_t speed;
> struct regulator *vcc;
> + struct regulator *lna;
> struct gpio_desc *on_off;
> struct gpio_desc *wakeup;
> int irq;
> @@ -282,21 +283,32 @@ static int sirf_set_active(struct sirf_data *data, bool
> active)
> static int sirf_runtime_suspend(struct device *dev)
> {
> struct sirf_data *data = dev_get_drvdata(dev);
> + int ret = 0;
>
> if (!data->on_off)
> - return regulator_disable(data->vcc);
> + ret = regulator_disable(data->vcc);
> + else
> + ret = sirf_set_active(data, false);
>
> - return sirf_set_active(data, false);
> + if (ret)
> + return ret;
> +
> + return regulator_disable(data->lna);
> }
>
> static int sirf_runtime_resume(struct device *dev)
> {
> struct sirf_data *data = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = regulator_enable(data->lna);
> + if (ret)
> + return ret;
>
> if (!data->on_off)
> return regulator_enable(data->vcc);
> -
> - return sirf_set_active(data, true);
> + else
> + return sirf_set_active(data, true);
> }
>
> static int __maybe_unused sirf_suspend(struct device *dev)
> @@ -384,6 +396,12 @@ static int sirf_probe(struct serdev_device *serdev)
> goto err_put_device;
> }
>
> + data->lna = devm_regulator_get(dev, "lna");
> + if (IS_ERR(data->lna)) {
> + ret = PTR_ERR(data->lna);
> + goto err_put_device;
> + }
> +
> data->on_off = devm_gpiod_get_optional(dev, "sirf,onoff",
> GPIOD_OUT_LOW);
> if (IS_ERR(data->on_off))
> --
> 2.11.0
>
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