V4L/DVB (7654): tda10086: make the xtal frequency a configuration option

Some DVB-S boards, i.e. with the SD1878 tuner, use a 4 MHz reference frequency.
This reqires a different setup of the clock PLL.
This patch adds an enum to the tda10086_config struct and sets the proper
values for the boards.

This patch also fixes the DVB-S section of the MD7134_BRIDGE_2

Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

4 files changed, 18 insertions, 3 deletions

diff --git a/drivers/media/dvb/dvb-usb/ttusb2.c b/drivers/media/dvb/dvb-usb/ttusb2.c
index 706687c78506..20ca9d9ee99b 100644
--- a/drivers/media/dvb/dvb-usb/ttusb2.c
+++ b/drivers/media/dvb/dvb-usb/ttusb2.c
@@ -147,6 +147,7 @@ static struct tda10086_config tda10086_config = {
         .demod_address = 0x0e,
         .invert = 0,
         .diseqc_tone = 1,
+        .xtal_freq = TDA10086_XTAL_16M,
 };
 
 static int ttusb2_frontend_attach(struct dvb_usb_adapter *adap)
diff --git a/drivers/media/dvb/frontends/tda10086.c b/drivers/media/dvb/frontends/tda10086.c
index 5fc26757f393..acf1471373ca 100644
--- a/drivers/media/dvb/frontends/tda10086.c
+++ b/drivers/media/dvb/frontends/tda10086.c
@@ -128,10 +128,15 @@ static int tda10086_init(struct dvb_frontend* fe)
         tda10086_write_byte(state, 0x32, 0x00); // irq off
         tda10086_write_byte(state, 0x31, 0x56); // setup AFC
 
-        // setup PLL (assumes 16Mhz XIN)
+        // setup PLL (this assumes SACLK = 96MHz)
         tda10086_write_byte(state, 0x55, 0x2c); // misc PLL setup
-        tda10086_write_byte(state, 0x3a, 0x0b); // M=12
-        tda10086_write_byte(state, 0x3b, 0x01); // P=2
+        if (state->config->xtal_freq == TDA10086_XTAL_16M) {
+                tda10086_write_byte(state, 0x3a, 0x0b); // M=12
+                tda10086_write_byte(state, 0x3b, 0x01); // P=2
+        } else {
+                tda10086_write_byte(state, 0x3a, 0x17); // M=24
+                tda10086_write_byte(state, 0x3b, 0x00); // P=1
+        }
         tda10086_write_mask(state, 0x55, 0x20, 0x00); // powerup PLL
 
         // setup TS interface
diff --git a/drivers/media/dvb/frontends/tda10086.h b/drivers/media/dvb/frontends/tda10086.h
index 197c237e515f..f25d5ea381e5 100644
--- a/drivers/media/dvb/frontends/tda10086.h
+++ b/drivers/media/dvb/frontends/tda10086.h
@@ -26,6 +26,11 @@
 #include <linux/dvb/frontend.h>
 #include <linux/firmware.h>
 
+enum tda10086_xtal {
+        TDA10086_XTAL_16M,
+        TDA10086_XTAL_4M
+};
+
 struct tda10086_config
 {
         /* the demodulator's i2c address */
@@ -36,6 +41,9 @@ struct tda10086_config
 
         /* do we need the diseqc signal with carrier? */
         u8 diseqc_tone;
+
+        /* frequency of the reference xtal */
+        enum tda10086_xtal xtal_freq;
 };
 
 #if defined(CONFIG_DVB_TDA10086) || (defined(CONFIG_DVB_TDA10086_MODULE) && defined(MODULE))
diff --git a/drivers/media/dvb/ttpci/budget.c b/drivers/media/dvb/ttpci/budget.c
index e36c32528e5c..7adfe17b0616 100644
--- a/drivers/media/dvb/ttpci/budget.c
+++ b/drivers/media/dvb/ttpci/budget.c
@@ -365,6 +365,7 @@ static struct tda10086_config tda10086_config = {
         .demod_address = 0x0e,
         .invert = 0,
         .diseqc_tone = 1,
+        .xtal_freq = TDA10086_XTAL_16M,
 };
 
 static u8 read_pwm(struct budget* budget)