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Commit 66752f83 authored by Andy Walls's avatar Andy Walls Committed by Mauro Carvalho Chehab
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V4L/DVB: v4l2_subdev: Add s_io_pin_config to v4l2_subdev_core_ops 



Add a method to v4l2_sudev_core_ops to allow bridge drivers to
manage what signal pads/functions are routed out to multiplexed IO pins on a
pin by pin basis.  The interface also allows specifying initial output settings
for pins and disabling an IO pin altogether.

Signed-off-by: default avatarAndy Walls <awalls@md.metrocast.net>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent e9e5cf47

include/media/v4l2-subdev.h

+23 −0
Original line number Diff line number Diff line
@@ -90,10 +90,31 @@ struct v4l2_decode_vbi_line { 
   not yet implemented) since ops provide proper type-checking.

 */



/* Subdevice external IO pin configuration */

#define V4L2_SUBDEV_IO_PIN_DISABLE	(1 << 0) /* ENABLE assumed */

#define V4L2_SUBDEV_IO_PIN_OUTPUT	(1 << 1)

#define V4L2_SUBDEV_IO_PIN_INPUT	(1 << 2)

#define V4L2_SUBDEV_IO_PIN_SET_VALUE	(1 << 3) /* Set output value */

#define V4L2_SUBDEV_IO_PIN_ACTIVE_LOW	(1 << 4) /* ACTIVE HIGH assumed */



struct v4l2_subdev_io_pin_config {

	u32 flags;	/* V4L2_SUBDEV_IO_PIN_* flags for this pin's config */

	u8 pin;		/* Chip external IO pin to configure */

	u8 function;	/* Internal signal pad/function to route to IO pin */

	u8 value;	/* Initial value for pin - e.g. GPIO output value */

	u8 strength;	/* Pin drive strength */

};



/* s_config: if set, then it is always called by the v4l2_i2c_new_subdev*

	functions after the v4l2_subdev was registered. It is used to pass

	platform data to the subdev which can be used during initialization.



   s_io_pin_config: configure one or more chip I/O pins for chips that

	multiplex different internal signal pads out to IO pins.  This function

	takes a pointer to an array of 'n' pin configuration entries, one for

	each pin being configured.  This function could be called at times

	other than just subdevice initialization.



   init: initialize the sensor registors to some sort of reasonable default

	values. Do not use for new drivers and should be removed in existing

	drivers.
@@ -115,6 +136,8 @@ struct v4l2_subdev_core_ops { 
	int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip);

	int (*log_status)(struct v4l2_subdev *sd);

	int (*s_config)(struct v4l2_subdev *sd, int irq, void *platform_data);

	int (*s_io_pin_config)(struct v4l2_subdev *sd, size_t n,

				      struct v4l2_subdev_io_pin_config *pincfg);

	int (*init)(struct v4l2_subdev *sd, u32 val);

	int (*load_fw)(struct v4l2_subdev *sd);

	int (*reset)(struct v4l2_subdev *sd, u32 val);