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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. 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* /* 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 functions after the v4l2_subdev was registered. It is used to pass
platform data to the subdev which can be used during initialization. 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 init: initialize the sensor registors to some sort of reasonable default
values. Do not use for new drivers and should be removed in existing values. Do not use for new drivers and should be removed in existing
drivers. 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 (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip);
int (*log_status)(struct v4l2_subdev *sd); int (*log_status)(struct v4l2_subdev *sd);
int (*s_config)(struct v4l2_subdev *sd, int irq, void *platform_data); 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 (*init)(struct v4l2_subdev *sd, u32 val);
int (*load_fw)(struct v4l2_subdev *sd); int (*load_fw)(struct v4l2_subdev *sd);
int (*reset)(struct v4l2_subdev *sd, u32 val); int (*reset)(struct v4l2_subdev *sd, u32 val);