From: Andreas Kemnade <andreas@kemnade.info>
To: letux-kernel@openphoenux.org, johan@kernel.org,
robh+dt@kernel.org, mark.rutland@arm.com,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Andreas Kemnade <andreas@kemnade.info>
Subject: [PATCH v3 5/6] gnss: sirf: add a separate supply for a lna
Date: Wed, 16 Jan 2019 22:18:11 +0100 [thread overview]
Message-ID: <20190116211812.6337-6-andreas@kemnade.info> (raw)
In-Reply-To: <20190116211812.6337-1-andreas@kemnade.info>
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>
---
Changes in v3:
- improved error checking
- style cleanup
Changes in v2:
- handle lna also if there is no on-off gpio
- rebase on changed 2/5
drivers/gnss/sirf.c | 50 ++++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 44 insertions(+), 6 deletions(-)
diff --git a/drivers/gnss/sirf.c b/drivers/gnss/sirf.c
index 943a2ec9b708..7de98edf198a 100644
--- a/drivers/gnss/sirf.c
+++ b/drivers/gnss/sirf.c
@@ -41,6 +41,7 @@ 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;
@@ -293,21 +294,52 @@ 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;
- if (!data->on_off)
- return regulator_disable(data->vcc);
+ if (data->on_off)
+ ret = sirf_set_active(data, false);
+ else
+ ret = regulator_disable(data->vcc);
+
+ if (ret)
+ return ret;
- return sirf_set_active(data, false);
+ ret = regulator_disable(data->lna);
+ if (ret) {
+ int reenable_ret;
+
+ if (data->on_off)
+ reenable_ret = sirf_set_active(data, true);
+ else
+ reenable_ret = regulator_enable(data->vcc);
+
+ if (reenable_ret)
+ dev_err(dev,
+ "failed to reenable power on failed suspend: %d\n",
+ reenable_ret);
+ }
+
+ return ret;
}
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);
+ if (data->on_off)
+ ret = sirf_set_active(data, true);
+ else
+ ret = regulator_enable(data->vcc);
- return sirf_set_active(data, true);
+ if (ret)
+ regulator_disable(data->lna);
+
+ return ret;
}
static int __maybe_unused sirf_suspend(struct device *dev)
@@ -395,6 +427,12 @@ 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
next prev parent reply other threads:[~2019-01-16 21:19 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-16 21:18 [PATCH v3 0/6] gnss: sirf: add support for w2sg0004 + lna Andreas Kemnade
2019-01-16 21:18 ` [PATCH v3 1/6] gnss: sirf: write data to gnss only when the gnss device is open Andreas Kemnade
2019-01-16 21:18 ` [PATCH v3 2/6] gnss: sirf: set power state initially off Andreas Kemnade
2019-01-22 17:22 ` Johan Hovold
2019-01-16 21:18 ` [PATCH v3 3/6] gnss: sirf: add support for configurations without wakeup signal Andreas Kemnade
2019-01-22 17:56 ` Johan Hovold
2019-01-16 21:18 ` [PATCH v3 4/6] dt-bindings: gnss: add w2sg0004 compatible string Andreas Kemnade
2019-01-16 21:18 ` Andreas Kemnade [this message]
2019-01-22 18:03 ` [PATCH v3 5/6] gnss: sirf: add a separate supply for a lna Johan Hovold
2019-01-16 21:18 ` [PATCH v3 6/6] dt-bindings: gnss: add lna-supply property Andreas Kemnade
2019-01-17 15:58 ` Rob Herring
2019-01-22 18:11 ` Johan Hovold
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