V4L/DVB (6612): Allow RESET_CLK callback and avoids unneeded loading

TM5600/TM6000 needs clock reset during firmware load. This patch adds the
capability of caling a callback method for this.

Also, avoids uneeded firmware loads.

Signed-off-by: Michel Ludwig <michel.ludwig@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/media/video/tuner-xc2028.c b/drivers/media/video/tuner-xc2028.c
index 0a2ffe4f38d0..89e6e64786ea 100644
--- a/drivers/media/video/tuner-xc2028.c
+++ b/drivers/media/video/tuner-xc2028.c
@@ -461,6 +461,23 @@ static int load_firmware(struct dvb_frontend *fe, unsigned int type,
                         }
                         continue;
                 }
+                if (size >= 0xff00) {
+                        switch (size) {
+                        case 0xff00:
+                                rc = priv->tuner_callback(priv->video_dev,
+                                                        XC2028_RESET_CLK, 0);
+                                if (rc < 0) {
+                                        tuner_err("Error at RESET code %d\n",
+                                                  (*p) & 0x7f);
+                                        return -EINVAL;
+                                }
+                        default:
+                                tuner_info("Invalid RESET code %d\n",
+                                           size & 0x7f);
+                                return -EINVAL;
+
+                        }
+                }
 
                 /* Checks for a sleep command */
                 if (size & 0x8000) {
@@ -627,6 +644,9 @@ static int check_firmware(struct dvb_frontend *fe, enum tuner_mode new_mode,
                 priv->bandwidth = bandwidth;
         }
 
+        if (!change_digital_bandwidth && priv->mode == T_DIGITAL_TV)
+                return 0;
+
         /* Load INIT1, if needed */
         tuner_dbg("Load init1 firmware, if exists\n");
         type0 = BASE | INIT1;