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Commit 7f05b530 authored by Devin Heitmueller's avatar Devin Heitmueller Committed by Mauro Carvalho Chehab
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V4L/DVB (11793): xc5000: Properly support power down for newer firmware 



Xceive got rid of the XREG_POWER_DOWN register in later firmware revisions.
Their technical support informed me that the correct way to put the tuner
to sleep is to pull the reset pin (but don't reload the firmware).

Signed-off-by: default avatarDevin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 361d4892

drivers/media/common/tuners/xc5000.c

+5 −3
Original line number Diff line number Diff line
@@ -83,7 +83,7 @@ struct xc5000_priv { 
#define XREG_D_CODE       0x04

#define XREG_IF_OUT       0x05

#define XREG_SEEK_MODE    0x07

#define XREG_POWER_DOWN   0x0A

#define XREG_POWER_DOWN   0x0A /* Obsolete */

#define XREG_SIGNALSOURCE 0x0D /* 0=Air, 1=Cable */

#define XREG_SMOOTHEDCVBS 0x0E

#define XREG_XTALFREQ     0x0F
@@ -841,12 +841,14 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe) 


static int xc5000_sleep(struct dvb_frontend *fe)

{

	struct xc5000_priv *priv = fe->tuner_priv;

	int ret;



	dprintk(1, "%s()\n", __func__);



	ret = xc_write_reg(priv, XREG_POWER_DOWN, 0);

	/* According to Xceive technical support, the "powerdown" register

	   was removed in newer versions of the firmware.  The "supported"

	   way to sleep the tuner is to pull the reset pin low for 10ms */

	ret = xc5000_TunerReset(fe);

	if (ret != XC_RESULT_SUCCESS) {

		printk(KERN_ERR

			"xc5000: %s() unable to shutdown tuner\n",