diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2013-05-31 09:19:55 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-06-17 12:31:29 (GMT) |
| commit | fa915996fb4e06a90d15fa485742a77cd8c1642b (patch) | |
| tree | 8e9960095760b20a3c5d86e3fe4386a52bd57a2e /drivers/media/radio/tef6862.c | |
| parent | 46821b1d206cbafab54fa0ba6dd80904722326e2 (diff) | |
| download | linux-fa915996fb4e06a90d15fa485742a77cd8c1642b.tar.xz | |
[media] tef6862: clamp frequency
Clamp the frequency to the valid frequency range as per the V4L2 specification.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Richard Röjfors <richard.rojfors@pelagicore.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/radio/tef6862.c')
| -rw-r--r-- | drivers/media/radio/tef6862.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/media/radio/tef6862.c b/drivers/media/radio/tef6862.c index d78afbb..06ac692 100644 --- a/drivers/media/radio/tef6862.c +++ b/drivers/media/radio/tef6862.c @@ -30,8 +30,8 @@ #define FREQ_MUL 16000 -#define TEF6862_LO_FREQ (875 * FREQ_MUL / 10) -#define TEF6862_HI_FREQ (108 * FREQ_MUL) +#define TEF6862_LO_FREQ (875U * FREQ_MUL / 10) +#define TEF6862_HI_FREQ (108U * FREQ_MUL) /* Write mode sub addresses */ #define WM_SUB_BANDWIDTH 0x0 @@ -104,6 +104,7 @@ static int tef6862_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequen { struct tef6862_state *state = to_state(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); + unsigned freq = f->frequency; u16 pll; u8 i2cmsg[3]; int err; @@ -111,7 +112,8 @@ static int tef6862_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequen if (f->tuner != 0) return -EINVAL; - pll = 1964 + ((f->frequency - TEF6862_LO_FREQ) * 20) / FREQ_MUL; + clamp(freq, TEF6862_LO_FREQ, TEF6862_HI_FREQ); + pll = 1964 + ((freq - TEF6862_LO_FREQ) * 20) / FREQ_MUL; i2cmsg[0] = (MODE_PRESET << MODE_SHIFT) | WM_SUB_PLLM; i2cmsg[1] = (pll >> 8) & 0xff; i2cmsg[2] = pll & 0xff; @@ -120,7 +122,7 @@ static int tef6862_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequen if (err != sizeof(i2cmsg)) return err < 0 ? err : -EIO; - state->freq = f->frequency; + state->freq = freq; return 0; } |