diff --git a/Documentation/ABI/testing/sysfs-i2c-pcm512x b/Documentation/ABI/testing/sysfs-i2c-pcm512x
new file mode 100644
index 000000000000..596cd97788db
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-i2c-pcm512x
@@ -0,0 +1,35 @@
+What:		/sys/bus/i2c/devices/<busnum>-<devaddr>/overclock_pll
+Date:		February 2015
+Contact:	Peter Rosin <peda@axentia.se>
+Description:	When the codec acts as clock master, tell the pcm512x
+		to allow overclocking the PLL (as a percentage). Zero
+		disables PLL overclocking.
+
+		Reading: returns the current PLL overclocking setting.
+
+		Writing: set a new PLL overclocking setting.
+		Accepted values: 0..20.
+
+What:		/sys/bus/i2c/devices/<busnum>-<devaddr>/overclock_dac
+Date:		February 2015
+Contact:	Peter Rosin <peda@axentia.se>
+Description:	When the codec acts as clock master, tell the pcm512x
+		to allow overclocking the DAC (as a percentage). Zero
+		disables DAC overclocking.
+
+		Reading: returns the current DAC overclocking setting.
+
+		Writing: set a new DAC overclocking setting.
+		Accepted values: 0..40.
+
+What:		/sys/bus/i2c/devices/<busnum>-<devaddr>/overclock_dsp
+Date:		February 2015
+Contact:	Peter Rosin <peda@axentia.se>
+Description:	When the codec acts as clock master, tell the pcm512x
+		to allow overclocking the DSP (as a percentage). Zero
+		disables DSP overclocking.
+
+		Reading: returns the current DSP overclocking setting.
+
+		Writing: set a new DSP overclocking setting.
+		Accepted values: 0..40.
diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
index f13ff7578c78..f4d3dc390aed 100644
--- a/sound/soc/codecs/pcm512x.c
+++ b/sound/soc/codecs/pcm512x.c
@@ -54,6 +54,9 @@ struct pcm512x_priv {
 	int pll_d;
 	int pll_p;
 	unsigned long real_pll;
+	unsigned long overclock_pll;
+	unsigned long overclock_dac;
+	unsigned long overclock_dsp;
 };
 
 /*
@@ -346,6 +349,132 @@ static const struct snd_soc_dapm_route pcm512x_dapm_routes[] = {
 	{ "OUTR", NULL, "DACR" },
 };
 
+static ssize_t pcm512x_overclock_pll(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%lu\n", pcm512x->overclock_pll);
+}
+
+static ssize_t pcm512x_overclock_pll_set(struct device *dev,
+					 struct device_attribute *attr,
+					 const char *buf, size_t count)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+	unsigned long value;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &value);
+	if (ret)
+		return ret;
+	if (value > 20)
+		return -EINVAL;
+	pcm512x->overclock_pll = value;
+
+	return count;
+}
+
+static DEVICE_ATTR(overclock_pll, 0644,
+		   pcm512x_overclock_pll, pcm512x_overclock_pll_set);
+
+static ssize_t pcm512x_overclock_dsp(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%lu\n", pcm512x->overclock_dsp);
+}
+
+static ssize_t pcm512x_overclock_dsp_set(struct device *dev,
+					 struct device_attribute *attr,
+					 const char *buf, size_t count)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+	unsigned long value;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &value);
+	if (ret)
+		return ret;
+	if (value > 40)
+		return -EINVAL;
+	pcm512x->overclock_dsp = value;
+
+	return count;
+}
+
+static DEVICE_ATTR(overclock_dsp, 0644,
+		   pcm512x_overclock_dsp, pcm512x_overclock_dsp_set);
+
+static ssize_t pcm512x_overclock_dac(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%lu\n", pcm512x->overclock_dac);
+}
+
+static ssize_t pcm512x_overclock_dac_set(struct device *dev,
+					 struct device_attribute *attr,
+					 const char *buf, size_t count)
+{
+	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
+	unsigned long value;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &value);
+	if (ret)
+		return ret;
+	if (value > 40)
+		return -EINVAL;
+	pcm512x->overclock_dac = value;
+
+	return count;
+}
+
+static DEVICE_ATTR(overclock_dac, 0644,
+		   pcm512x_overclock_dac, pcm512x_overclock_dac_set);
+
+static unsigned long pcm512x_pll_max(struct pcm512x_priv *pcm512x)
+{
+	return 25000000 + 25000000 * pcm512x->overclock_pll / 100;
+}
+
+static unsigned long pcm512x_dsp_max(struct pcm512x_priv *pcm512x)
+{
+	return 50000000 + 50000000 * pcm512x->overclock_dsp / 100;
+}
+
+static unsigned long pcm512x_dac_max(struct pcm512x_priv *pcm512x,
+				     unsigned long rate)
+{
+	return rate + rate * pcm512x->overclock_dac / 100;
+}
+
+static unsigned long pcm512x_sck_max(struct pcm512x_priv *pcm512x)
+{
+	if (!pcm512x->pll_out)
+		return 25000000;
+	return pcm512x_pll_max(pcm512x);
+}
+
+static unsigned long pcm512x_ncp_target(struct pcm512x_priv *pcm512x,
+					unsigned long dac_rate)
+{
+	/*
+	 * If the DAC is not actually overclocked, use the good old
+	 * NCP target rate...
+	 */
+	if (dac_rate <= 6144000)
+		return 1536000;
+	/*
+	 * ...but if the DAC is in fact overclocked, bump the NCP target
+	 * rate to get the recommended dividers even when overclocking.
+	 */
+	return pcm512x_dac_max(pcm512x, 1536000);
+}
+
 static const u32 pcm512x_dai_rates[] = {
 	8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
 	88200, 96000, 176400, 192000, 384000,
@@ -359,6 +488,7 @@ static const struct snd_pcm_hw_constraint_list constraints_slave = {
 static int pcm512x_hw_rule_rate(struct snd_pcm_hw_params *params,
 				struct snd_pcm_hw_rule *rule)
 {
+	struct pcm512x_priv *pcm512x = rule->private;
 	struct snd_interval ranges[2];
 	int frame_size;
 
@@ -377,7 +507,7 @@ static int pcm512x_hw_rule_rate(struct snd_pcm_hw_params *params,
 		 */
 		memset(ranges, 0, sizeof(ranges));
 		ranges[0].min = 8000;
-		ranges[0].max = 25000000 / frame_size / 2;
+		ranges[0].max = pcm512x_sck_max(pcm512x) / frame_size / 2;
 		ranges[1].min = DIV_ROUND_UP(16000000, frame_size);
 		ranges[1].max = 384000;
 		break;
@@ -408,7 +538,7 @@ static int pcm512x_dai_startup_master(struct snd_pcm_substream *substream,
 		return snd_pcm_hw_rule_add(substream->runtime, 0,
 					   SNDRV_PCM_HW_PARAM_RATE,
 					   pcm512x_hw_rule_rate,
-					   NULL,
+					   pcm512x,
 					   SNDRV_PCM_HW_PARAM_FRAME_BITS,
 					   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 
@@ -517,6 +647,8 @@ static unsigned long pcm512x_find_sck(struct snd_soc_dai *dai,
 				      unsigned long bclk_rate)
 {
 	struct device *dev = dai->dev;
+	struct snd_soc_codec *codec = dai->codec;
+	struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 	unsigned long sck_rate;
 	int pow2;
 
@@ -527,9 +659,10 @@ static unsigned long pcm512x_find_sck(struct snd_soc_dai *dai,
 	 * as many factors of 2 as possible, as that makes it easier
 	 * to find a fast DAC rate
 	 */
-	pow2 = 1 << fls((25000000 - 16000000) / bclk_rate);
+	pow2 = 1 << fls((pcm512x_pll_max(pcm512x) - 16000000) / bclk_rate);
 	for (; pow2; pow2 >>= 1) {
-		sck_rate = rounddown(25000000, bclk_rate * pow2);
+		sck_rate = rounddown(pcm512x_pll_max(pcm512x),
+				     bclk_rate * pow2);
 		if (sck_rate >= 16000000)
 			break;
 	}
@@ -678,7 +811,7 @@ static unsigned long pcm512x_pllin_dac_rate(struct snd_soc_dai *dai,
 		return 0; /* futile, quit early */
 
 	/* run DAC no faster than 6144000 Hz */
-	for (dac_rate = rounddown(6144000, osr_rate);
+	for (dac_rate = rounddown(pcm512x_dac_max(pcm512x, 6144000), osr_rate);
 	     dac_rate;
 	     dac_rate -= osr_rate) {
 
@@ -805,7 +938,7 @@ static int pcm512x_set_dividers(struct snd_soc_dai *dai,
 	osr_rate = 16 * sample_rate;
 
 	/* run DSP no faster than 50 MHz */
-	dsp_div = mck_rate > 50000000 ? 2 : 1;
+	dsp_div = mck_rate > pcm512x_dsp_max(pcm512x) ? 2 : 1;
 
 	dac_rate = pcm512x_pllin_dac_rate(dai, osr_rate, pllin_rate);
 	if (dac_rate) {
@@ -836,7 +969,8 @@ static int pcm512x_set_dividers(struct snd_soc_dai *dai,
 		dacsrc_rate = pllin_rate;
 	} else {
 		/* run DAC no faster than 6144000 Hz */
-		unsigned long dac_mul = 6144000 / osr_rate;
+		unsigned long dac_mul = pcm512x_dac_max(pcm512x, 6144000)
+			/ osr_rate;
 		unsigned long sck_mul = sck_rate / osr_rate;
 
 		for (; dac_mul; dac_mul--) {
@@ -876,7 +1010,8 @@ static int pcm512x_set_dividers(struct snd_soc_dai *dai,
 	}
 	dac_rate = dacsrc_rate / dac_div;
 
-	ncp_div = DIV_ROUND_CLOSEST(dac_rate, 1536000);
+	ncp_div = DIV_ROUND_CLOSEST(dac_rate,
+				    pcm512x_ncp_target(pcm512x, dac_rate));
 	if (ncp_div > 128 || dac_rate / ncp_div > 2048000) {
 		/* run NCP no faster than 2048000 Hz, but why? */
 		ncp_div = DIV_ROUND_UP(dac_rate, 2048000);
@@ -938,11 +1073,11 @@ static int pcm512x_set_dividers(struct snd_soc_dai *dai,
 		return ret;
 	}
 
-	if (sample_rate <= 48000)
+	if (sample_rate <= pcm512x_dac_max(pcm512x, 48000))
 		fssp = PCM512x_FSSP_48KHZ;
-	else if (sample_rate <= 96000)
+	else if (sample_rate <= pcm512x_dac_max(pcm512x, 96000))
 		fssp = PCM512x_FSSP_96KHZ;
-	else if (sample_rate <= 192000)
+	else if (sample_rate <= pcm512x_dac_max(pcm512x, 192000))
 		fssp = PCM512x_FSSP_192KHZ;
 	else
 		fssp = PCM512x_FSSP_384KHZ;
@@ -1389,6 +1524,18 @@ int pcm512x_probe(struct device *dev, struct regmap *regmap)
 		goto err_pm;
 	}
 
+	ret = device_create_file(dev, &dev_attr_overclock_pll);
+	if (ret < 0)
+		dev_warn(dev, "Failed to add overclock_pll sysfs: %d\n", ret);
+
+	ret = device_create_file(dev, &dev_attr_overclock_dsp);
+	if (ret < 0)
+		dev_warn(dev, "Failed to add overclock_dsp sysfs: %d\n", ret);
+
+	ret = device_create_file(dev, &dev_attr_overclock_dac);
+	if (ret < 0)
+		dev_warn(dev, "Failed to add overclock_dac sysfs: %d\n", ret);
+
 	return 0;
 
 err_pm:
@@ -1407,6 +1554,9 @@ void pcm512x_remove(struct device *dev)
 {
 	struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
 
+	device_remove_file(dev, &dev_attr_overclock_pll);
+	device_remove_file(dev, &dev_attr_overclock_dsp);
+	device_remove_file(dev, &dev_attr_overclock_dac);
 	snd_soc_unregister_codec(dev);
 	pm_runtime_disable(dev);
 	if (!IS_ERR(pcm512x->sclk))
