V4L/DVB (13983): [STV6110x] add clk_div member to stv6110x_config structure

Using clk_div member of stv6110x_config structure the tuner's clock
output divider can be configured. It is set in stv6110x_attach.

Signed-off-by: Andreas Regel <andreas.regel@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/stv6110x.c

@@ -362,6 +362,7 @@ struct stv6110x_devctl *stv6110x_attach(struct dvb_frontend *fe,
 {
 	struct stv6110x_state *stv6110x;
 	u8 default_regs[] = {0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e};
+	int ret;
 
 	stv6110x = kzalloc(sizeof (struct stv6110x_state), GFP_KERNEL);
 	if (stv6110x == NULL)
@@ -372,6 +373,43 @@ struct stv6110x_devctl *stv6110x_attach(struct dvb_frontend *fe,
 	stv6110x->devctl	= &stv6110x_ctl;
 	memcpy(stv6110x->regs, default_regs, 8);
 
+	/* setup divider */
+	switch (stv6110x->config->clk_div) {
+	default:
+	case 1:
+		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
+		break;
+	case 2:
+		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
+		break;
+	case 4:
+		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
+		break;
+	case 8:
+	case 0:
+		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
+		break;
+	}
+
+	if (fe->ops.i2c_gate_ctrl) {
+		ret = fe->ops.i2c_gate_ctrl(fe, 1);
+		if (ret < 0)
+			goto error;
+	}
+
+	ret = stv6110x_write_regs(stv6110x, 0, stv6110x->regs,
+				  ARRAY_SIZE(stv6110x->regs));
+	if (ret < 0) {
+		dprintk(FE_ERROR, 1, "Initialization failed");
+		goto error;
+	}
+
+	if (fe->ops.i2c_gate_ctrl) {
+		ret = fe->ops.i2c_gate_ctrl(fe, 0);
+		if (ret < 0)
+			goto error;
+	}
+
 	fe->tuner_priv		= stv6110x;
 	fe->ops.tuner_ops	= stv6110x_ops;
 

drivers/media/dvb/frontends/stv6110x.h

@@ -26,6 +26,7 @@
 struct stv6110x_config {
 	u8	addr;
 	u32	refclk;
+	u8	clk_div; /* divisor value for the output clock */
 };
 
 enum tuner_mode {