diff --git a/drivers/media/video/saa7115.c b/drivers/media/video/saa7115.c
index dceebc0..edea9e3 100644
--- a/drivers/media/video/saa7115.c
+++ b/drivers/media/video/saa7115.c
@@ -72,6 +72,10 @@
 	int sat;
 	enum v4l2_chip_ident ident;
 	u32 audclk_freq;
+	u32 crystal_freq;
+	u8 ucgc;
+	u8 cgcdiv;
+	u8 apll;
 };
 
 /* ----------------------------------------------------------------------- */
@@ -375,10 +379,6 @@
 };
 
 static const unsigned char saa7115_init_misc[] = {
-	0x38, 0x03,		/* audio stuff */
-	0x39, 0x10,
-	0x3a, 0x08,
-
 	0x81, 0x01,		/* reg 0x15,0x16 define blanking window */
 	0x82, 0x00,
 	0x83, 0x01,		/* I port settings */
@@ -584,6 +584,7 @@
 	u32 acni;
 	u32 hz;
 	u64 f;
+	u8 acc = 0; 	/* reg 0x3a, audio clock control */
 
 	v4l_dbg(1, debug, client, "set audio clock freq: %d\n", freq);
 
@@ -591,18 +592,34 @@
 	if (freq < 32000 || freq > 48000)
 		return -EINVAL;
 
+	/* The saa7113 has no audio clock */
+	if (state->ident == V4L2_IDENT_SAA7113)
+		return 0;
+
 	/* hz is the refresh rate times 100 */
 	hz = (state->std & V4L2_STD_525_60) ? 5994 : 5000;
 	/* acpf = (256 * freq) / field_frequency == (256 * 100 * freq) / hz */
 	acpf = (25600 * freq) / hz;
 	/* acni = (256 * freq * 2^23) / crystal_frequency =
 		  (freq * 2^(8+23)) / crystal_frequency =
-		  (freq << 31) / 32.11 MHz */
+		  (freq << 31) / crystal_frequency */
 	f = freq;
 	f = f << 31;
-	do_div(f, 32110000);
+	do_div(f, state->crystal_freq);
 	acni = f;
+	if (state->ucgc) {
+		acpf = acpf * state->cgcdiv / 16;
+		acni = acni * state->cgcdiv / 16;
+		acc = 0x80;
+		if (state->cgcdiv == 3)
+			acc |= 0x40;
+	}
+	if (state->apll)
+		acc |= 0x08;
 
+	saa7115_write(client, 0x38, 0x03);
+	saa7115_write(client, 0x39, 0x10);
+	saa7115_write(client, 0x3a, acc);
 	saa7115_write(client, 0x30, acpf & 0xff);
 	saa7115_write(client, 0x31, (acpf >> 8) & 0xff);
 	saa7115_write(client, 0x32, (acpf >> 16) & 0x03);
@@ -1260,6 +1277,21 @@
 		}
 		break;
 
+	case VIDIOC_INT_S_CRYSTAL_FREQ:
+	{
+		struct v4l2_crystal_freq *freq = arg;
+
+		if (freq->freq != SAA7115_FREQ_32_11_MHZ &&
+		    freq->freq != SAA7115_FREQ_24_576_MHZ)
+			return -EINVAL;
+		state->crystal_freq = freq->freq;
+		state->cgcdiv = (freq->flags & SAA7115_FREQ_FL_CGCDIV) ? 3 : 4;
+		state->ucgc = (freq->flags & SAA7115_FREQ_FL_UCGC) ? 1 : 0;
+		state->apll = (freq->flags & SAA7115_FREQ_FL_APLL) ? 1 : 0;
+		saa7115_set_audio_clock_freq(client, state->audclk_freq);
+		break;
+	}
+
 	case VIDIOC_INT_DECODE_VBI_LINE:
 		saa7115_decode_vbi_line(client, arg);
 		break;
@@ -1401,10 +1433,13 @@
 	v4l_dbg(1, debug, client, "writing init values\n");
 
 	/* init to 60hz/48khz */
-	if (state->ident == V4L2_IDENT_SAA7113)
+	if (state->ident == V4L2_IDENT_SAA7113) {
+		state->crystal_freq = SAA7115_FREQ_24_576_MHZ;
 		saa7115_writeregs(client, saa7113_init_auto_input);
-	else
+	} else {
+		state->crystal_freq = SAA7115_FREQ_32_11_MHZ;
 		saa7115_writeregs(client, saa7115_init_auto_input);
+	}
 	saa7115_writeregs(client, saa7115_init_misc);
 	saa7115_writeregs(client, saa7115_cfg_60hz_fullres_x);
 	saa7115_writeregs(client, saa7115_cfg_60hz_fullres_y);
diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c
index d330fa9..ad92e07 100644
--- a/drivers/media/video/v4l2-common.c
+++ b/drivers/media/video/v4l2-common.c
@@ -331,7 +331,8 @@
 	[_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)]  = "VIDIOC_INT_S_AUDIO_ROUTING",
 	[_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)]  = "VIDIOC_INT_G_AUDIO_ROUTING",
 	[_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)]  = "VIDIOC_INT_S_VIDEO_ROUTING",
-	[_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING"
+	[_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING",
+	[_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)]   = "VIDIOC_INT_S_CRYSTAL_FREQ"
 };
 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
 
@@ -667,6 +668,12 @@
 		printk ("%s: input=0x%x, output=0x%x\n", s, p->input, p->output);
 		break;
 	}
+	case VIDIOC_INT_S_CRYSTAL_FREQ:
+	{
+		struct v4l2_crystal_freq *p=arg;
+		printk ("%s: freq=%u, flags=0x%x\n", s, p->freq, p->flags);
+		break;
+	}
 	case VIDIOC_G_SLICED_VBI_CAP:
 	{
 		struct v4l2_sliced_vbi_cap *p=arg;
diff --git a/include/media/saa7115.h b/include/media/saa7115.h
index 6b4836f..9f0e228 100644
--- a/include/media/saa7115.h
+++ b/include/media/saa7115.h
@@ -1,5 +1,5 @@
 /*
-    saa7115.h - definition for saa7113/4/5 inputs
+    saa7115.h - definition for saa7113/4/5 inputs and frequency flags
 
     Copyright (C) 2006 Hans Verkuil (hverkuil@xs4all.nl)
 
@@ -33,5 +33,14 @@
 #define SAA7115_SVIDEO2    8
 #define SAA7115_SVIDEO3    9
 
+/* SAA7115 v4l2_crystal_freq frequency values */
+#define SAA7115_FREQ_32_11_MHZ  32110000   /* 32.11 MHz crystal, SAA7114/5 only */
+#define SAA7115_FREQ_24_576_MHZ 24576000   /* 24.576 MHz crystal */
+
+/* SAA7115 v4l2_crystal_freq audio clock control flags */
+#define SAA7115_FREQ_FL_UCGC   (1 << 0)	   /* SA 3A[7], UCGC, SAA7115 only */
+#define SAA7115_FREQ_FL_CGCDIV (1 << 1)	   /* SA 3A[6], CGCDIV, SAA7115 only */
+#define SAA7115_FREQ_FL_APLL   (1 << 2)	   /* SA 3A[3], APLL, SAA7114/5 only */
+
 #endif
 
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 642520a..827f7ed 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -211,4 +211,15 @@
 #define	VIDIOC_INT_S_VIDEO_ROUTING	_IOW ('d', 111, struct v4l2_routing)
 #define	VIDIOC_INT_G_VIDEO_ROUTING	_IOR ('d', 112, struct v4l2_routing)
 
+struct v4l2_crystal_freq {
+	u32 freq;	/* frequency in Hz of the crystal */
+	u32 flags; 	/* device specific flags */
+};
+
+/* Sets the frequency of the crystal used to generate the clocks.
+   An extra flags field allows device specific configuration regarding
+   clock frequency dividers, etc. If not used, then set flags to 0.
+   If the frequency is not supported, then -EINVAL is returned. */
+#define VIDIOC_INT_S_CRYSTAL_FREQ 	_IOW ('d', 113, struct v4l2_crystal_freq)
+
 #endif /* V4L2_COMMON_H_ */