613cbb91e9
The CSI2 specification specifies a standard method to access camera sensor registers called "Camera Control Interface (CCI)". This uses either 8 or 16 bit (big-endian wire order) register addresses and supports 8, 16, 24 or 32 bit (big-endian wire order) register widths. Currently a lot of Linux camera sensor drivers all have their own custom helpers for this, often copy and pasted from other drivers. Add a set of generic helpers for this so that all sensor drivers can switch to a single common implementation. These helpers take an extra optional "int *err" function parameter, this can be used to chain a bunch of register accesses together with only a single error check at the end, rather than needing to error check each individual register access. The first failing call will set the contents of err to a non 0 value and all other calls will then become no-ops. Link: https://lore.kernel.org/linux-media/59aefa7f-7bf9-6736-6040-39551329cd0a@redhat.com/ Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Tested-by: Tommaso Merciai <tomm.merciai@gmail.com> Reviewed-by: Tommaso Merciai <tomm.merciai@gmail.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
43 lines
1.4 KiB
Makefile
43 lines
1.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the V4L2 core
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#
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ccflags-y += -I$(srctree)/drivers/media/dvb-frontends
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ccflags-y += -I$(srctree)/drivers/media/tuners
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tuner-objs := tuner-core.o
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videodev-objs := v4l2-dev.o v4l2-ioctl.o v4l2-device.o v4l2-fh.o \
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v4l2-event.o v4l2-subdev.o v4l2-common.o \
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v4l2-ctrls-core.o v4l2-ctrls-api.o \
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v4l2-ctrls-request.o v4l2-ctrls-defs.o
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# Please keep it alphabetically sorted by Kconfig name
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# (e. g. LC_ALL=C sort Makefile)
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videodev-$(CONFIG_COMPAT) += v4l2-compat-ioctl32.o
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videodev-$(CONFIG_MEDIA_CONTROLLER) += v4l2-mc.o
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videodev-$(CONFIG_SPI) += v4l2-spi.o
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videodev-$(CONFIG_TRACEPOINTS) += v4l2-trace.o
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videodev-$(CONFIG_VIDEO_V4L2_I2C) += v4l2-i2c.o
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# Please keep it alphabetically sorted by Kconfig name
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# (e. g. LC_ALL=C sort Makefile)
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obj-$(CONFIG_V4L2_ASYNC) += v4l2-async.o
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obj-$(CONFIG_V4L2_CCI) += v4l2-cci.o
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obj-$(CONFIG_V4L2_FLASH_LED_CLASS) += v4l2-flash-led-class.o
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obj-$(CONFIG_V4L2_FWNODE) += v4l2-fwnode.o
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obj-$(CONFIG_V4L2_H264) += v4l2-h264.o
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obj-$(CONFIG_V4L2_JPEG_HELPER) += v4l2-jpeg.o
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obj-$(CONFIG_V4L2_MEM2MEM_DEV) += v4l2-mem2mem.o
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obj-$(CONFIG_V4L2_VP9) += v4l2-vp9.o
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obj-$(CONFIG_VIDEOBUF_DMA_CONTIG) += videobuf-dma-contig.o
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obj-$(CONFIG_VIDEOBUF_DMA_SG) += videobuf-dma-sg.o
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obj-$(CONFIG_VIDEOBUF_GEN) += videobuf-core.o
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obj-$(CONFIG_VIDEOBUF_VMALLOC) += videobuf-vmalloc.o
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obj-$(CONFIG_VIDEO_TUNER) += tuner.o
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obj-$(CONFIG_VIDEO_DEV) += v4l2-dv-timings.o videodev.o
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