[PATCH v2 0/8] iio: core: wrap IIO device into an iio_dev_opaque object

Alexandru Ardelean
2020-05-14T13:18:00Z

This change starts to hide some internal fields of the IIO device into
the framework.

Because the iio_priv_to_dev() will be hidden some pre-work is done to
try to remove it from some interrupt handlers.
iio_priv_to_dev() will become a function call and won't be expandable
into place (as-is now as an inline function).

Changelog v1 -> v2:
- add pre-work patches that remove some calls to iio_priv_to_dev() from
interrupt handlers
- renamed iio_dev_priv -> iio_dev_opaque
- moved the iio_dev_opaque to 'include/linux/iio/iio-opaque.h' this way
it should be usable for debugging
- the iio_priv() call, is still an inline function that returns an
'indio_dev->priv' reference; this field is added to 'struct iio_dev';
the reference is computed in iio_device_alloc() and should be
cacheline aligned
- the to_iio_dev_opaque() container is in the
'include/linux/iio/iio-opaque.h' header; it's still implemented with
some pointer arithmetic; one idea was to do it via an
'indio_dev->opaque' field; that may still be an optionif there are
some opinions in that direction

Alexandru Ardelean (8):
iio: proximity: ping: pass reference to IIO device via call-stack
iio: at91-sama5d2_adc: pass ref to IIO device via param for int
function
iio: at91_adc: pass ref to IIO device via param for int function
iio: stm32-dfsdm-adc: pass iio device as arg for the interrupt handler
iio: stm32-adc: pass iio device as arg for the interrupt handler
iio: core: wrap IIO device into an iio_dev_opaque object
iio: core: simplify alloc alignment code
iio: core: move debugfs data on the private iio dev info

drivers/iio/adc/at91-sama5d2_adc.c | 7 ++-
drivers/iio/adc/at91_adc.c | 5 +-
drivers/iio/adc/stm32-adc.c | 10 ++--
drivers/iio/adc/stm32-dfsdm-adc.c | 6 +--
drivers/iio/industrialio-core.c | 75 ++++++++++++++++++++----------
drivers/iio/proximity/ping.c | 5 +-
include/linux/iio/iio-opaque.h | 27 +++++++++++
include/linux/iio/iio.h | 24 +++-------
8 files changed, 99 insertions(+), 60 deletions(-)
create mode 100644 include/linux/iio/iio-opaque.h

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2.17.1