gnss: sirf: add a separate supply for a lna
Devices might have a separate lna between antenna input of the gps chip and the antenna which might have a separate supply. Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Johan Hovold <johan@kernel.org>
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8fafef42c7
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@ -40,6 +40,7 @@ struct sirf_data {
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struct serdev_device *serdev;
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speed_t speed;
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struct regulator *vcc;
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struct regulator *lna;
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struct gpio_desc *on_off;
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struct gpio_desc *wakeup;
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int irq;
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@ -289,21 +290,60 @@ static int sirf_set_active(struct sirf_data *data, bool active)
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static int sirf_runtime_suspend(struct device *dev)
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{
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struct sirf_data *data = dev_get_drvdata(dev);
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int ret2;
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int ret;
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if (!data->on_off)
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return regulator_disable(data->vcc);
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if (data->on_off)
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ret = sirf_set_active(data, false);
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else
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ret = regulator_disable(data->vcc);
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return sirf_set_active(data, false);
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if (ret)
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return ret;
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ret = regulator_disable(data->lna);
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if (ret)
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goto err_reenable;
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return 0;
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err_reenable:
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if (data->on_off)
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ret2 = sirf_set_active(data, true);
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else
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ret2 = regulator_enable(data->vcc);
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if (ret2)
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dev_err(dev,
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"failed to reenable power on failed suspend: %d\n",
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ret2);
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return ret;
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}
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static int sirf_runtime_resume(struct device *dev)
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{
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struct sirf_data *data = dev_get_drvdata(dev);
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int ret;
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if (!data->on_off)
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return regulator_enable(data->vcc);
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ret = regulator_enable(data->lna);
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if (ret)
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return ret;
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return sirf_set_active(data, true);
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if (data->on_off)
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ret = sirf_set_active(data, true);
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else
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ret = regulator_enable(data->vcc);
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if (ret)
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goto err_disable_lna;
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return 0;
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err_disable_lna:
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regulator_disable(data->lna);
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return ret;
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}
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static int __maybe_unused sirf_suspend(struct device *dev)
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@ -391,6 +431,12 @@ static int sirf_probe(struct serdev_device *serdev)
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goto err_put_device;
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}
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data->lna = devm_regulator_get(dev, "lna");
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if (IS_ERR(data->lna)) {
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ret = PTR_ERR(data->lna);
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goto err_put_device;
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}
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data->on_off = devm_gpiod_get_optional(dev, "sirf,onoff",
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GPIOD_OUT_LOW);
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if (IS_ERR(data->on_off))
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