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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: Andy Walls <awalls@md.metrocast.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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@ -90,10 +90,31 @@ struct v4l2_decode_vbi_line {
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not yet implemented) since ops provide proper type-checking.
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*/
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/* Subdevice external IO pin configuration */
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#define V4L2_SUBDEV_IO_PIN_DISABLE (1 << 0) /* ENABLE assumed */
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#define V4L2_SUBDEV_IO_PIN_OUTPUT (1 << 1)
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#define V4L2_SUBDEV_IO_PIN_INPUT (1 << 2)
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#define V4L2_SUBDEV_IO_PIN_SET_VALUE (1 << 3) /* Set output value */
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#define V4L2_SUBDEV_IO_PIN_ACTIVE_LOW (1 << 4) /* ACTIVE HIGH assumed */
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struct v4l2_subdev_io_pin_config {
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u32 flags; /* V4L2_SUBDEV_IO_PIN_* flags for this pin's config */
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u8 pin; /* Chip external IO pin to configure */
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u8 function; /* Internal signal pad/function to route to IO pin */
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u8 value; /* Initial value for pin - e.g. GPIO output value */
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u8 strength; /* Pin drive strength */
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};
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/* s_config: if set, then it is always called by the v4l2_i2c_new_subdev*
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functions after the v4l2_subdev was registered. It is used to pass
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platform data to the subdev which can be used during initialization.
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s_io_pin_config: configure one or more chip I/O pins for chips that
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multiplex different internal signal pads out to IO pins. This function
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takes a pointer to an array of 'n' pin configuration entries, one for
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each pin being configured. This function could be called at times
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other than just subdevice initialization.
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init: initialize the sensor registors to some sort of reasonable default
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values. Do not use for new drivers and should be removed in existing
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drivers.
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@ -115,6 +136,8 @@ struct v4l2_subdev_core_ops {
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int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip);
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int (*log_status)(struct v4l2_subdev *sd);
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int (*s_config)(struct v4l2_subdev *sd, int irq, void *platform_data);
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int (*s_io_pin_config)(struct v4l2_subdev *sd, size_t n,
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struct v4l2_subdev_io_pin_config *pincfg);
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int (*init)(struct v4l2_subdev *sd, u32 val);
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int (*load_fw)(struct v4l2_subdev *sd);
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int (*reset)(struct v4l2_subdev *sd, u32 val);
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