V4L/DVB (7027): tda18271: put the device in standby mode during sleep()
Add function, tda18271_set_standby_mode.
During sleep, enter standby mode with slave tuner output enabled,
loop through on and xtal oscillator on.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/dvb/frontends/tda18271-common.c b/drivers/media/dvb/frontends/tda18271-common.c
index d7a3356..cebb6b9 100644
--- a/drivers/media/dvb/frontends/tda18271-common.c
+++ b/drivers/media/dvb/frontends/tda18271-common.c
@@ -452,6 +452,42 @@
/*---------------------------------------------------------------------*/
+/*
+ * Standby modes, EP3 [7:5]
+ *
+ * | SM || SM_LT || SM_XT || mode description
+ * |=====\\=======\\=======\\===================================
+ * | 0 || 0 || 0 || normal mode
+ * |-----||-------||-------||-----------------------------------
+ * | || || || standby mode w/ slave tuner output
+ * | 1 || 0 || 0 || & loop thru & xtal oscillator on
+ * |-----||-------||-------||-----------------------------------
+ * | 1 || 1 || 0 || standby mode w/ xtal oscillator on
+ * |-----||-------||-------||-----------------------------------
+ * | 1 || 1 || 1 || power off
+ *
+ */
+
+int tda18271_set_standby_mode(struct dvb_frontend *fe,
+ int sm, int sm_lt, int sm_xt)
+{
+ struct tda18271_priv *priv = fe->tuner_priv;
+ unsigned char *regs = priv->tda18271_regs;
+
+ tda_dbg("sm = %d, sm_lt = %d, sm_xt = %d\n", sm, sm_lt, sm_xt);
+
+ regs[R_EP3] &= ~0xe0; /* clear sm, sm_lt, sm_xt */
+ regs[R_EP3] |= sm ? (1 << 7) : 0 |
+ sm_lt ? (1 << 6) : 0 |
+ sm_xt ? (1 << 5) : 0;
+
+ tda18271_write_regs(fe, R_EP3, 1);
+
+ return 0;
+}
+
+/*---------------------------------------------------------------------*/
+
int tda18271_calc_main_pll(struct dvb_frontend *fe, u32 freq)
{
/* sets main post divider & divider bytes, but does not write them */