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	for linux-dvb@linuxtv.org; Sat, 12 Apr 2008 17:05:57 +0200
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Date: Sat, 12 Apr 2008 17:04:50 +0200
From: Matthias Schwarzott <zzam@gentoo.org>
To: linux-dvb@linuxtv.org
Content-Disposition: inline; filename=05_mt312-invertable-lnb-voltage.diff
Subject: [linux-dvb] [patch 5/5] mt312: add attach-time setting to invert
	lnb-voltage
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Add a setting to config struct for inversion of lnb-voltage.
Needed for support of Avermedia A700 cards.

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Index: v4l-dvb/linux/drivers/media/dvb/frontends/mt312.c
===================================================================
--- v4l-dvb.orig/linux/drivers/media/dvb/frontends/mt312.c
+++ v4l-dvb/linux/drivers/media/dvb/frontends/mt312.c
@@ -422,11 +422,16 @@ static int mt312_set_voltage(struct dvb_
 {
 	struct mt312_state *state = fe->demodulator_priv;
 	const u8 volt_tab[3] = { 0x00, 0x40, 0x00 };
+	u8 val;
 
 	if (v > SEC_VOLTAGE_OFF)
 		return -EINVAL;
 
-	return mt312_writereg(state, DISEQC_MODE, volt_tab[v]);
+	val = volt_tab[v];
+	if (state->config->voltage_inverted)
+		val ^= 0x40;
+
+	return mt312_writereg(state, DISEQC_MODE, val);
 }
 
 static int mt312_read_status(struct dvb_frontend *fe, fe_status_t *s)
Index: v4l-dvb/linux/drivers/media/dvb/frontends/mt312.h
===================================================================
--- v4l-dvb.orig/linux/drivers/media/dvb/frontends/mt312.h
+++ v4l-dvb/linux/drivers/media/dvb/frontends/mt312.h
@@ -31,6 +31,9 @@
 struct mt312_config {
 	/* the demodulator's i2c address */
 	u8 demod_address;
+
+	/* inverted voltage setting */
+	int voltage_inverted:1;
 };
 
 #if defined(CONFIG_DVB_MT312) || (defined(CONFIG_DVB_MT312_MODULE) && defined(MODULE))

-- 

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