From fa915996fb4e06a90d15fa485742a77cd8c1642b Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 31 May 2013 06:19:55 -0300 Subject: [PATCH] [media] tef6862: clamp frequency MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Clamp the frequency to the valid frequency range as per the V4L2 specification. Signed-off-by: Hans Verkuil Cc: Richard Röjfors Signed-off-by: Mauro Carvalho Chehab --- drivers/media/radio/tef6862.c | 10 ++++++---- 1 file 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; } -- 2.7.4