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acrn-kernel/drivers/iio/accel/kxsd9.h

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iio: accel: kxsd9: Split out SPI transport This moves the KXSD9 SPI transport out to its own file and Kconfig entry, so that we will be able to add another transport method. We export the common probe and add a local header file for the functionality shared between the main driver and the transport driver. We make the SPI transport the default for the driver if SPI is available and the KXSD9 driver was selected, so the oldconfig upgrade path will be clear. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-01 17:44:38 +08:00
#include <linux/device.h>
#include <linux/kernel.h>
#define KXSD9_STATE_RX_SIZE 2
#define KXSD9_STATE_TX_SIZE 2
iio: accel: kxsd9: Replace "parent" with "dev" What is passed to the .probe() and .remove() functions is technically the parent of the created IIO device but it becomes a big confusion for the head to have it named like this since it is usually clear from context the "dev" refers to the physical device, and when next adding PM callbacks a clean "struct device *dev" pointer is passed to these and that makes it even more confused. Rename "parent" to "dev" like in most other drivers. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-01 17:44:47 +08:00
int kxsd9_common_probe(struct device *dev,
iio: accel: kxsd9: Convert to use regmap for transport This converts the KXSD9 driver to drop the custom transport mechanism and just use regmap like everything else. Tested-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-01 17:44:40 +08:00
struct regmap *map,
iio: accel: kxsd9: Split out SPI transport This moves the KXSD9 SPI transport out to its own file and Kconfig entry, so that we will be able to add another transport method. We export the common probe and add a local header file for the functionality shared between the main driver and the transport driver. We make the SPI transport the default for the driver if SPI is available and the KXSD9 driver was selected, so the oldconfig upgrade path will be clear. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-01 17:44:38 +08:00
const char *name);
iio: accel: kxsd9: Replace "parent" with "dev" What is passed to the .probe() and .remove() functions is technically the parent of the created IIO device but it becomes a big confusion for the head to have it named like this since it is usually clear from context the "dev" refers to the physical device, and when next adding PM callbacks a clean "struct device *dev" pointer is passed to these and that makes it even more confused. Rename "parent" to "dev" like in most other drivers. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-01 17:44:47 +08:00
int kxsd9_common_remove(struct device *dev);
iio: accel: kxsd9: Deploy system and runtime PM This deploys runtime and system PM in the KXSD9 driver: - Use the force_runtime_suspend/resume callbacks as system PM operations. - Add buffer prepare/unprepare callbacks to grab the runtime PM while we're using buffered reads and put get/put_autosuspend in these. - Insert get/put_autosuspend calls anywhere the IO is used from the raw read/write callbacks. - Move the fullscale setting to be cached in the state container so we can restore it properly when coming back from system/runtime suspend. - Set the autosuspend delay to two orders of magnitude that of the sensor start-up time (20ms) so we will autosuspend after 2s. - Register the callbacks in both the SPI and I2C subdrivers. Tested with the I2C KXSD9 on the Qualcomm APQ8060 Dragonboard. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-09-01 17:44:48 +08:00
extern const struct dev_pm_ops kxsd9_dev_pm_ops;