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V4L/DVB (10700): saa7115: don't access reg 0x87 if it is not present.

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Devices like the saa7111 do not have this register, so check for this
before using it.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2009-02-18 12:22:16 -03:00 committed by Mauro Carvalho Chehab
parent 10afbef15e
commit 674a323218
1 changed files with 6 additions and 5 deletions
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11
drivers/media/video/saa7115.c
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@ -1310,11 +1310,12 @@ static int saa711x_s_stream(struct v4l2_subdev *sd, int enable)
v4l2_dbg(1, debug, sd, "%s output\n",
enable ? "enable" : "disable");
if (state->enable != enable) {
state->enable = enable;
saa711x_write(sd, R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED,
state->enable);
}
if (state->enable == enable)
return 0;
state->enable = enable;
if (!saa711x_has_reg(state->ident, R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED))
return 0;
saa711x_write(sd, R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED, state->enable);
return 0;
}