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From: Gwendal Grignou <gwendal@chromium.org>
To: dmitry.torokhov@gmail.com, groeck@chromium.org,
	briannorris@chromium.org, jic23@kernel.org, knaack.h@gmx.de,
	lars@metafoo.de, pmeerw@pmeerw.net, lee.jones@linaro.org,
	bleung@chromium.org, enric.balletbo@collabora.com,
	dianders@chromium.org, fabien.lahoudere@collabora.com
Cc: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
	linux-input@vger.kernel.org,
	Gwendal Grignou <gwendal@chromium.org>
Subject: [PATCH v5 13/18] iio: expose iio_device_set_clock
Date: Fri, 15 Nov 2019 01:34:07 -0800
Message-ID: <20191115093412.144922-14-gwendal@chromium.org> (raw)
In-Reply-To: <20191115093412.144922-1-gwendal@chromium.org>

Some IIO devices may want to override the default (realtime) to another
clock source by default.
It can beneficial when timestamps coming from the hardware or underlying
drivers are already in that format.
It can always be overridden by attribute current_timestamp_clock.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
---
 drivers/iio/industrialio-core.c | 8 +++++++-
 include/linux/iio/iio.h         | 2 ++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index a46cdf2d8833..92815bdc14ee 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -188,7 +188,12 @@ ssize_t iio_read_const_attr(struct device *dev,
 }
 EXPORT_SYMBOL(iio_read_const_attr);
 
-static int iio_device_set_clock(struct iio_dev *indio_dev, clockid_t clock_id)
+/**
+ * iio_device_set_clock() - Set current timestamping clock for the device
+ * @indio_dev: IIO device structure containing the device
+ * @clock_id: timestamping clock posix identifier to set.
+ */
+int iio_device_set_clock(struct iio_dev *indio_dev, clockid_t clock_id)
 {
 	int ret;
 	const struct iio_event_interface *ev_int = indio_dev->event_interface;
@@ -206,6 +211,7 @@ static int iio_device_set_clock(struct iio_dev *indio_dev, clockid_t clock_id)
 
 	return 0;
 }
+EXPORT_SYMBOL(iio_device_set_clock);
 
 /**
  * iio_get_time_ns() - utility function to get a time stamp for events etc
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 862ce0019eba..b18f34a8901f 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -627,6 +627,8 @@ static inline clockid_t iio_device_get_clock(const struct iio_dev *indio_dev)
 	return indio_dev->clock_id;
 }
 
+int iio_device_set_clock(struct iio_dev *indio_dev, clockid_t clock_id);
+
 /**
  * dev_to_iio_dev() - Get IIO device struct from a device struct
  * @dev: 		The device embedded in the IIO device
-- 
2.24.0.432.g9d3f5f5b63-goog


  parent reply index

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-15  9:33 [PATCH v5 00/18] cros_ec: Add sensorhub driver and FIFO processing Gwendal Grignou
2019-11-15  9:33 ` [PATCH v5 01/18] mfd: cros_ec: Add sensor_count and make check_features public Gwendal Grignou
2019-11-15  9:33 ` [PATCH v5 02/18] platform: cros_ec: Add cros_ec_sensor_hub driver Gwendal Grignou
2019-11-16 11:32   ` Jonathan Cameron
2019-11-15  9:33 ` [PATCH v5 03/18] platform/mfd:iio: cros_ec: Register sensor through sensorhub Gwendal Grignou
2019-11-15  9:33 ` [PATCH v5 04/18] platform: chrome: cros-ec: record event timestamp in the hard irq Gwendal Grignou
2019-11-15  9:33 ` [PATCH v5 05/18] platform: chrome: cros_ec: Do not attempt to register a non-positive IRQ number Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 06/18] platform: chrome: cros_ec: handle MKBP more events flag Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 07/18] Revert "Input: cros_ec_keyb - add back missing mask for event_type" Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 08/18] Revert "Input: cros_ec_keyb: mask out extra flags in event_type" Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 09/18] platform: chrome: sensorhub: Add FIFO support Gwendal Grignou
2019-11-16 11:39   ` Jonathan Cameron
2019-11-22 11:35   ` Enric Balletbo i Serra
2020-03-24 20:31     ` Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 10/18] platform: chrome: sensorhub: Add code to spread timestmap Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 11/18] platform: chrome: sensorhub: Add median filter Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 12/18] iio: cros_ec: Move function description to .c file Gwendal Grignou
2019-11-15  9:34 ` Gwendal Grignou [this message]
2019-11-16 11:42   ` [PATCH v5 13/18] iio: expose iio_device_set_clock Jonathan Cameron
2019-11-15  9:34 ` [PATCH v5 14/18] iio: cros_ec: Register to cros_ec_sensorhub when EC supports FIFO Gwendal Grignou
2019-11-16 11:44   ` Jonathan Cameron
2019-11-15  9:34 ` [PATCH v5 15/18] iio: cros_ec: Remove pm function Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 16/18] iio: cros_ec: Expose hwfifo_timeout Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 17/18] iio: cros_ec: Report hwfifo_watermark_max Gwendal Grignou
2019-11-15  9:34 ` [PATCH v5 18/18] iio: cros_ec: Use Hertz as unit for sampling frequency Gwendal Grignou
2019-11-22 11:11 ` [PATCH v5 00/18] cros_ec: Add sensorhub driver and FIFO processing Enric Balletbo i Serra

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