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V4L/DVB: v4l2_subdev: Add s_io_pin_config to v4l2_subdev_core_ops

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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: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls 2010-07-18 18:51:10 -03:00 committed by Mauro Carvalho Chehab
parent e9e5cf4727
commit 66752f8396
1 changed files with 23 additions and 0 deletions
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23
include/media/v4l2-subdev.h
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@ -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);