diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c
index 1eea40e94c43..25a640304430 100644
--- a/sound/pci/pcxhr/pcxhr.c
+++ b/sound/pci/pcxhr/pcxhr.c
@@ -180,16 +180,18 @@ static const struct board_parameters pcxhr_board_params[] = {
 				      (x->fw_file_set == 0)   || \
 				      (x->fw_file_set == 2))
 
-static int pcxhr_pll_freq_register(unsigned int freq, unsigned int* pllreg,
-				   unsigned int* realfreq)
+int pcxhr_pll_freq_register(unsigned int freq, unsigned int max_freq,
+			    unsigned int *pllreg, unsigned int *realfreq)
 {
 	unsigned int reg;
 
-	if (freq < 6900 || freq > 110000)
+	if (freq < 6900 || freq > max_freq)
 		return -EINVAL;
 	reg = (28224000 * 2) / freq;
 	reg = (reg - 1) / 2;
-	if (reg < 0x200)
+	if (reg < 0x100)
+		*pllreg = reg + 0xc00;
+	else if (reg < 0x200)
 		*pllreg = reg + 0x800;
 	else if (reg < 0x400)
 		*pllreg = reg & 0x1ff;
@@ -260,7 +262,8 @@ static int pcxhr_get_clock_reg(struct pcxhr_mgr *mgr, unsigned int rate,
 		default :
 			val = PCXHR_FREQ_PLL;
 			/* get the value for the pll register */
-			err = pcxhr_pll_freq_register(rate, &pllreg, &realfreq);
+			err = pcxhr_pll_freq_register(rate, 110000, &pllreg,
+						      &realfreq);
 			if (err)
 				return err;
 			pcxhr_init_rmh(&rmh, CMD_ACCESS_IO_WRITE);
diff --git a/sound/pci/pcxhr/pcxhr.h b/sound/pci/pcxhr/pcxhr.h
index 1b85200d00dd..011227b1fe79 100644
--- a/sound/pci/pcxhr/pcxhr.h
+++ b/sound/pci/pcxhr/pcxhr.h
@@ -190,6 +190,8 @@ struct pcxhr_hostport
 };
 
 /* exported */
+int pcxhr_pll_freq_register(unsigned int freq, unsigned int max_freq,
+			    unsigned int *pllreg, unsigned int *realfreq);
 int pcxhr_create_pcm(struct snd_pcxhr *chip);
 int pcxhr_set_clock(struct pcxhr_mgr *mgr, unsigned int rate);
 int pcxhr_get_external_clock(struct pcxhr_mgr *mgr,
diff --git a/sound/pci/pcxhr/pcxhr_mix22.c b/sound/pci/pcxhr/pcxhr_mix22.c
index 80d22e22ea30..76beb443d983 100644
--- a/sound/pci/pcxhr/pcxhr_mix22.c
+++ b/sound/pci/pcxhr/pcxhr_mix22.c
@@ -305,36 +305,6 @@ int hr222_sub_init(struct pcxhr_mgr *mgr)
 }
 
 
-/* calc PLL register */
-/* TODO : there is a very similar fct in pcxhr.c */
-static int hr222_pll_freq_register(unsigned int freq,
-				   unsigned int *pllreg,
-				   unsigned int *realfreq)
-{
-	unsigned int reg;
-
-	if (freq < 6900 || freq > 219000)
-		return -EINVAL;
-	reg = (28224000 * 2) / freq;
-	reg = (reg - 1) / 2;
-	if (reg < 0x100)
-		*pllreg = reg + 0xC00;
-	else if (reg < 0x200)
-		*pllreg = reg + 0x800;
-	else if (reg < 0x400)
-		*pllreg = reg & 0x1ff;
-	else if (reg < 0x800) {
-		*pllreg = ((reg >> 1) & 0x1ff) + 0x200;
-		reg &= ~1;
-	} else {
-		*pllreg = ((reg >> 2) & 0x1ff) + 0x400;
-		reg &= ~3;
-	}
-	if (realfreq)
-		*realfreq = (28224000 / (reg + 1));
-	return 0;
-}
-
 int hr222_sub_set_clock(struct pcxhr_mgr *mgr,
 			unsigned int rate,
 			int *changed)
@@ -345,7 +315,8 @@ int hr222_sub_set_clock(struct pcxhr_mgr *mgr,
 
 	switch (mgr->use_clock_type) {
 	case HR22_CLOCK_TYPE_INTERNAL:
-		err = hr222_pll_freq_register(rate, &pllreg, &realfreq);
+		err = pcxhr_pll_freq_register(rate, 219000,
+					      &pllreg, &realfreq);
 		if (err)
 			return err;