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Subject[PATCH RFC 4/5] gnss: sirf: add a separate supply for a lna
Date
Devices might have a separate lna between antenna output of the gps
chip and the antenna which might have a separate supply

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
drivers/gnss/sirf.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/drivers/gnss/sirf.c b/drivers/gnss/sirf.c
index 6a0e5c0a2d62..f7573ca2dacd 100644
--- a/drivers/gnss/sirf.c
+++ b/drivers/gnss/sirf.c
@@ -30,6 +30,7 @@ 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;
@@ -217,6 +218,7 @@ static int sirf_runtime_suspend(struct device *dev)

if (!data->on_off)
return regulator_disable(data->vcc);
+ regulator_disable(data->lna);
ret = sirf_set_active(data, false);

if (ret)
@@ -245,13 +247,20 @@ static int sirf_runtime_resume(struct device *dev)
if (ret)
goto err_close_serdev;
}
+
+ ret = regulator_enable(data->lna);
+ if (ret)
+ goto err_disable_vcc;
+
ret = sirf_set_active(data, true);

if (!ret)
return 0;

+err_disable_vcc:
if (!data->on_off)
regulator_disable(data->vcc);
+
err_close_serdev:
serdev_device_close(data->serdev);
return ret;
@@ -340,6 +349,12 @@ 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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