From: Antti Palosaari <crope@iki.fi>
Date: Wed, 23 Apr 2014 01:56:54 +0000 (-0300)
Subject: [media] em28xx: PCTV tripleStick (292e) LNA support
X-Git-Tag: firefly_0821_release~176^2~3573^2~258
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ffb9948e65e785a8660b7f1e49022cc6505e709e;p=firefly-linux-kernel-4.4.55.git

[media] em28xx: PCTV tripleStick (292e) LNA support

External LNA between antenna connector and RF tuner is controlled
by EM28178 GPIO 0. GPIO value 1 is LNA active and value 0 is LNA
disabled.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
---

diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c b/drivers/media/usb/em28xx/em28xx-dvb.c
index b79e08bb3aad..a121ed9561fd 100644
--- a/drivers/media/usb/em28xx/em28xx-dvb.c
+++ b/drivers/media/usb/em28xx/em28xx-dvb.c
@@ -746,6 +746,21 @@ static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe)
 #endif
 }
 
+static int em28xx_pctv_292e_set_lna(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	struct em28xx_i2c_bus *i2c_bus = fe->dvb->priv;
+	struct em28xx *dev = i2c_bus->dev;
+	u8 lna;
+
+	if (c->lna == 1)
+		lna = 0x01;
+	else
+		lna = 0x00;
+
+	return em28xx_write_reg_bits(dev, EM2874_R80_GPIO_P0_CTRL, lna, 0x01);
+}
+
 static int em28xx_mt352_terratec_xs_init(struct dvb_frontend *fe)
 {
 	/* Values extracted from a USB trace of the Terratec Windows driver */
@@ -1553,6 +1568,7 @@ static int em28xx_dvb_init(struct em28xx *dev)
 			}
 
 			dvb->i2c_client_tuner = client;
+			dvb->fe[0]->ops.set_lna = em28xx_pctv_292e_set_lna;
 		}
 		break;
 	default: