From: Steven Toth Date: Mon, 3 Nov 2008 04:04:44 +0000 (-0500) Subject: DVB: s5h1411: bugfix: Setting serial or parallel mode could destroy bits X-Git-Tag: v2.6.27.5~24 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3d6b04d6871d38b6791a949d81b42aea0d7a389b;p=karo-tx-linux.git DVB: s5h1411: bugfix: Setting serial or parallel mode could destroy bits cherry picked from commit 1af46b450fa49c57d73764d66f267335ccd807e2 DVB: s5h1411: bugfix: Setting serial or parallel mode could destroy bits Adding a serialmode function to read/and/or/write the register for safety. Signed-off-by: Steven Toth Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Michael Krufky Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/media/dvb/frontends/s5h1411.c b/drivers/media/dvb/frontends/s5h1411.c index 2da1a3763de9..a710ea387ab7 100644 --- a/drivers/media/dvb/frontends/s5h1411.c +++ b/drivers/media/dvb/frontends/s5h1411.c @@ -471,6 +471,20 @@ static int s5h1411_set_spectralinversion(struct dvb_frontend *fe, int inversion) return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x24, val); } +static int s5h1411_set_serialmode(struct dvb_frontend *fe, int serial) +{ + struct s5h1411_state *state = fe->demodulator_priv; + u16 val; + + dprintk("%s(%d)\n", __func__, serial); + val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xbd) & ~0x100; + + if (serial == 1) + val |= 0x100; + + return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, val); +} + static int s5h1411_enable_modulation(struct dvb_frontend *fe, fe_modulation_t m) { @@ -612,10 +626,10 @@ static int s5h1411_init(struct dvb_frontend *fe) if (state->config->output_mode == S5H1411_SERIAL_OUTPUT) /* Serial */ - s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, 0x1101); + s5h1411_set_serialmode(fe, 1); else /* Parallel */ - s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, 0x1001); + s5h1411_set_serialmode(fe, 0); s5h1411_set_spectralinversion(fe, state->config->inversion); s5h1411_set_if_freq(fe, state->config->vsb_if);