media: ar0521: Add LINK_FREQ control

Add support for V4L2_CID_LINK_FREQ which currently reports a single
hard-coded frequency which depends on the fixed pixel clock.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/media/i2c/ar0521.c b/drivers/media/i2c/ar0521.c
index acb9509d77082b1096909edc303f03fc7ce3a82d..c9c578b223ef136a63219413a235a90610fbc77c 100644 (file)
--- a/drivers/media/i2c/ar0521.c
+++ b/drivers/media/i2c/ar0521.c
@@ -89,6 +89,10 @@ static const char * const ar0521_supply_names[] = {
        "vaa",          /* Analog (2.7V) supply */
 };
 
+static const s64 ar0521_link_frequencies[] = {
+       184000000,
+};
+
 struct ar0521_ctrls {
        struct v4l2_ctrl_handler handler;
        struct {
@@ -570,6 +574,7 @@ static int ar0521_init_controls(struct ar0521_dev *sensor)
        const struct v4l2_ctrl_ops *ops = &ar0521_ctrl_ops;
        struct ar0521_ctrls *ctrls = &sensor->ctrls;
        struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+       struct v4l2_ctrl *link_freq;
        int ret;
 
        v4l2_ctrl_handler_init(hdl, 32);
@@ -608,6 +613,12 @@ static int ar0521_init_controls(struct ar0521_dev *sensor)
        ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, 0,
                                            65535, 1, 360);
 
+       link_freq = v4l2_ctrl_new_int_menu(hdl, ops, V4L2_CID_LINK_FREQ,
+                                       ARRAY_SIZE(ar0521_link_frequencies) - 1,
+                                       0, ar0521_link_frequencies);
+       if (link_freq)
+               link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
        ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, ops,
                                        V4L2_CID_TEST_PATTERN,
                                        ARRAY_SIZE(test_pattern_menu) - 1,