Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 660 insertions, 0 deletions

diff --git a/sound/soc/codecs/cs4265.c b/sound/soc/codecs/cs4265.c
new file mode 100644
index 000000000..0b7d6826f
--- /dev/null
+++ b/sound/soc/codecs/cs4265.c
@@ -0,0 +1,660 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * cs4265.c -- CS4265 ALSA SoC audio driver
+ *
+ * Copyright 2014 Cirrus Logic, Inc.
+ *
+ * Author: Paul Handrigan <paul.handrigan@cirrus.com>
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+#include "cs4265.h"
+
+struct cs4265_private {
+	struct regmap *regmap;
+	struct gpio_desc *reset_gpio;
+	u8 format;
+	u32 sysclk;
+};
+
+static const struct reg_default cs4265_reg_defaults[] = {
+	{ CS4265_PWRCTL, 0x0F },
+	{ CS4265_DAC_CTL, 0x08 },
+	{ CS4265_ADC_CTL, 0x00 },
+	{ CS4265_MCLK_FREQ, 0x00 },
+	{ CS4265_SIG_SEL, 0x40 },
+	{ CS4265_CHB_PGA_CTL, 0x00 },
+	{ CS4265_CHA_PGA_CTL, 0x00 },
+	{ CS4265_ADC_CTL2, 0x19 },
+	{ CS4265_DAC_CHA_VOL, 0x00 },
+	{ CS4265_DAC_CHB_VOL, 0x00 },
+	{ CS4265_DAC_CTL2, 0xC0 },
+	{ CS4265_INT_MASK, 0x00 },
+	{ CS4265_STATUS_MODE_MSB, 0x00 },
+	{ CS4265_STATUS_MODE_LSB, 0x00 },
+	{ CS4265_SPDIF_CTL1, 0x00 },
+	{ CS4265_SPDIF_CTL2, 0x00 },
+};
+
+static bool cs4265_readable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CS4265_CHIP_ID ... CS4265_MAX_REGISTER:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool cs4265_volatile_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CS4265_INT_STATUS:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static DECLARE_TLV_DB_SCALE(pga_tlv, -1200, 50, 0);
+
+static DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 0);
+
+static const char * const digital_input_mux_text[] = {
+	"SDIN1", "SDIN2"
+};
+
+static SOC_ENUM_SINGLE_DECL(digital_input_mux_enum, CS4265_SIG_SEL, 7,
+		digital_input_mux_text);
+
+static const struct snd_kcontrol_new digital_input_mux =
+	SOC_DAPM_ENUM("Digital Input Mux", digital_input_mux_enum);
+
+static const char * const mic_linein_text[] = {
+	"MIC", "LINEIN"
+};
+
+static SOC_ENUM_SINGLE_DECL(mic_linein_enum, CS4265_ADC_CTL2, 0,
+		mic_linein_text);
+
+static const char * const cam_mode_text[] = {
+	"One Byte", "Two Byte"
+};
+
+static SOC_ENUM_SINGLE_DECL(cam_mode_enum, CS4265_SPDIF_CTL1, 5,
+		cam_mode_text);
+
+static const char * const cam_mono_stereo_text[] = {
+	"Stereo", "Mono"
+};
+
+static SOC_ENUM_SINGLE_DECL(spdif_mono_stereo_enum, CS4265_SPDIF_CTL2, 2,
+		cam_mono_stereo_text);
+
+static const char * const mono_select_text[] = {
+	"Channel A", "Channel B"
+};
+
+static SOC_ENUM_SINGLE_DECL(spdif_mono_select_enum, CS4265_SPDIF_CTL2, 0,
+		mono_select_text);
+
+static const struct snd_kcontrol_new mic_linein_mux =
+	SOC_DAPM_ENUM("ADC Input Capture Mux", mic_linein_enum);
+
+static const struct snd_kcontrol_new loopback_ctl =
+	SOC_DAPM_SINGLE("Switch", CS4265_SIG_SEL, 1, 1, 0);
+
+static const struct snd_kcontrol_new spdif_switch =
+	SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 0, 0);
+
+static const struct snd_kcontrol_new dac_switch =
+	SOC_DAPM_SINGLE("Switch", CS4265_PWRCTL, 1, 1, 0);
+
+static const struct snd_kcontrol_new cs4265_snd_controls[] = {
+
+	SOC_DOUBLE_R_SX_TLV("PGA Volume", CS4265_CHA_PGA_CTL,
+			      CS4265_CHB_PGA_CTL, 0, 0x28, 0x30, pga_tlv),
+	SOC_DOUBLE_R_TLV("DAC Volume", CS4265_DAC_CHA_VOL,
+		      CS4265_DAC_CHB_VOL, 0, 0xFF, 1, dac_tlv),
+	SOC_SINGLE("De-emp 44.1kHz Switch", CS4265_DAC_CTL, 1,
+				1, 0),
+	SOC_SINGLE("DAC INV Switch", CS4265_DAC_CTL2, 5,
+				1, 0),
+	SOC_SINGLE("DAC Zero Cross Switch", CS4265_DAC_CTL2, 6,
+				1, 0),
+	SOC_SINGLE("DAC Soft Ramp Switch", CS4265_DAC_CTL2, 7,
+				1, 0),
+	SOC_SINGLE("ADC HPF Switch", CS4265_ADC_CTL, 1,
+				1, 0),
+	SOC_SINGLE("ADC Zero Cross Switch", CS4265_ADC_CTL2, 3,
+				1, 1),
+	SOC_SINGLE("ADC Soft Ramp Switch", CS4265_ADC_CTL2, 7,
+				1, 0),
+	SOC_SINGLE("E to F Buffer Disable Switch", CS4265_SPDIF_CTL1,
+				6, 1, 0),
+	SOC_ENUM("C Data Access", cam_mode_enum),
+	SOC_SINGLE("Validity Bit Control Switch", CS4265_SPDIF_CTL2,
+				3, 1, 0),
+	SOC_ENUM("SPDIF Mono/Stereo", spdif_mono_stereo_enum),
+	SOC_SINGLE("MMTLR Data Switch", CS4265_SPDIF_CTL2, 0, 1, 0),
+	SOC_ENUM("Mono Channel Select", spdif_mono_select_enum),
+	SND_SOC_BYTES("C Data Buffer", CS4265_C_DATA_BUFF, 24),
+};
+
+static const struct snd_soc_dapm_widget cs4265_dapm_widgets[] = {
+
+	SND_SOC_DAPM_INPUT("LINEINL"),
+	SND_SOC_DAPM_INPUT("LINEINR"),
+	SND_SOC_DAPM_INPUT("MICL"),
+	SND_SOC_DAPM_INPUT("MICR"),
+
+	SND_SOC_DAPM_AIF_OUT("DOUT", NULL,  0,
+			SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("SPDIFOUT", NULL,  0,
+			SND_SOC_NOPM, 0, 0),
+
+	SND_SOC_DAPM_MUX("ADC Mux", SND_SOC_NOPM, 0, 0, &mic_linein_mux),
+
+	SND_SOC_DAPM_ADC("ADC", NULL, CS4265_PWRCTL, 2, 1),
+	SND_SOC_DAPM_PGA("Pre-amp MIC", CS4265_PWRCTL, 3,
+			1, NULL, 0),
+
+	SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM,
+			 0, 0, &digital_input_mux),
+
+	SND_SOC_DAPM_MIXER("SDIN1 Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_MIXER("SDIN2 Input Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_MIXER("SPDIF Transmitter", SND_SOC_NOPM, 0, 0, NULL, 0),
+
+	SND_SOC_DAPM_SWITCH("Loopback", SND_SOC_NOPM, 0, 0,
+			&loopback_ctl),
+	SND_SOC_DAPM_SWITCH("SPDIF", CS4265_SPDIF_CTL2, 5, 1,
+			&spdif_switch),
+	SND_SOC_DAPM_SWITCH("DAC", CS4265_PWRCTL, 1, 1,
+			&dac_switch),
+
+	SND_SOC_DAPM_AIF_IN("DIN1", NULL,  0,
+			SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("DIN2", NULL,  0,
+			SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("TXIN", NULL,  0,
+			CS4265_SPDIF_CTL2, 5, 1),
+
+	SND_SOC_DAPM_OUTPUT("LINEOUTL"),
+	SND_SOC_DAPM_OUTPUT("LINEOUTR"),
+
+};
+
+static const struct snd_soc_dapm_route cs4265_audio_map[] = {
+
+	{"DIN1", NULL, "DAI1 Playback"},
+	{"DIN2", NULL, "DAI2 Playback"},
+	{"SDIN1 Input Mixer", NULL, "DIN1"},
+	{"SDIN2 Input Mixer", NULL, "DIN2"},
+	{"Input Mux", "SDIN1", "SDIN1 Input Mixer"},
+	{"Input Mux", "SDIN2", "SDIN2 Input Mixer"},
+	{"DAC", "Switch", "Input Mux"},
+	{"SPDIF", "Switch", "Input Mux"},
+	{"LINEOUTL", NULL, "DAC"},
+	{"LINEOUTR", NULL, "DAC"},
+	{"SPDIFOUT", NULL, "SPDIF"},
+
+	{"Pre-amp MIC", NULL, "MICL"},
+	{"Pre-amp MIC", NULL, "MICR"},
+	{"ADC Mux", "MIC", "Pre-amp MIC"},
+	{"ADC Mux", "LINEIN", "LINEINL"},
+	{"ADC Mux", "LINEIN", "LINEINR"},
+	{"ADC", NULL, "ADC Mux"},
+	{"DOUT", NULL, "ADC"},
+	{"DAI1 Capture", NULL, "DOUT"},
+	{"DAI2 Capture", NULL, "DOUT"},
+
+	/* Loopback */
+	{"Loopback", "Switch", "ADC"},
+	{"DAC", NULL, "Loopback"},
+};
+
+struct cs4265_clk_para {
+	u32 mclk;
+	u32 rate;
+	u8 fm_mode; /* values 1, 2, or 4 */
+	u8 mclkdiv;
+};
+
+static const struct cs4265_clk_para clk_map_table[] = {
+	/*32k*/
+	{8192000, 32000, 0, 0},
+	{12288000, 32000, 0, 1},
+	{16384000, 32000, 0, 2},
+	{24576000, 32000, 0, 3},
+	{32768000, 32000, 0, 4},
+
+	/*44.1k*/
+	{11289600, 44100, 0, 0},
+	{16934400, 44100, 0, 1},
+	{22579200, 44100, 0, 2},
+	{33868000, 44100, 0, 3},
+	{45158400, 44100, 0, 4},
+
+	/*48k*/
+	{12288000, 48000, 0, 0},
+	{18432000, 48000, 0, 1},
+	{24576000, 48000, 0, 2},
+	{36864000, 48000, 0, 3},
+	{49152000, 48000, 0, 4},
+
+	/*64k*/
+	{8192000, 64000, 1, 0},
+	{12288000, 64000, 1, 1},
+	{16934400, 64000, 1, 2},
+	{24576000, 64000, 1, 3},
+	{32768000, 64000, 1, 4},
+
+	/* 88.2k */
+	{11289600, 88200, 1, 0},
+	{16934400, 88200, 1, 1},
+	{22579200, 88200, 1, 2},
+	{33868000, 88200, 1, 3},
+	{45158400, 88200, 1, 4},
+
+	/* 96k */
+	{12288000, 96000, 1, 0},
+	{18432000, 96000, 1, 1},
+	{24576000, 96000, 1, 2},
+	{36864000, 96000, 1, 3},
+	{49152000, 96000, 1, 4},
+
+	/* 128k */
+	{8192000, 128000, 2, 0},
+	{12288000, 128000, 2, 1},
+	{16934400, 128000, 2, 2},
+	{24576000, 128000, 2, 3},
+	{32768000, 128000, 2, 4},
+
+	/* 176.4k */
+	{11289600, 176400, 2, 0},
+	{16934400, 176400, 2, 1},
+	{22579200, 176400, 2, 2},
+	{33868000, 176400, 2, 3},
+	{49152000, 176400, 2, 4},
+
+	/* 192k */
+	{12288000, 192000, 2, 0},
+	{18432000, 192000, 2, 1},
+	{24576000, 192000, 2, 2},
+	{36864000, 192000, 2, 3},
+	{49152000, 192000, 2, 4},
+};
+
+static int cs4265_get_clk_index(int mclk, int rate)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(clk_map_table); i++) {
+		if (clk_map_table[i].rate == rate &&
+				clk_map_table[i].mclk == mclk)
+			return i;
+	}
+	return -EINVAL;
+}
+
+static int cs4265_set_sysclk(struct snd_soc_dai *codec_dai, int clk_id,
+			unsigned int freq, int dir)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	struct cs4265_private *cs4265 = snd_soc_component_get_drvdata(component);
+	int i;
+
+	if (clk_id != 0) {
+		dev_err(component->dev, "Invalid clk_id %d\n", clk_id);
+		return -EINVAL;
+	}
+	for (i = 0; i < ARRAY_SIZE(clk_map_table); i++) {
+		if (clk_map_table[i].mclk == freq) {
+			cs4265->sysclk = freq;
+			return 0;
+		}
+	}
+	cs4265->sysclk = 0;
+	dev_err(component->dev, "Invalid freq parameter %d\n", freq);
+	return -EINVAL;
+}
+
+static int cs4265_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	struct cs4265_private *cs4265 = snd_soc_component_get_drvdata(component);
+	u8 iface = 0;
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBP_CFP:
+		snd_soc_component_update_bits(component, CS4265_ADC_CTL,
+				CS4265_ADC_MASTER,
+				CS4265_ADC_MASTER);
+		break;
+	case SND_SOC_DAIFMT_CBC_CFC:
+		snd_soc_component_update_bits(component, CS4265_ADC_CTL,
+				CS4265_ADC_MASTER,
+				0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	 /* interface format */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		iface |= SND_SOC_DAIFMT_I2S;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		iface |= SND_SOC_DAIFMT_RIGHT_J;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		iface |= SND_SOC_DAIFMT_LEFT_J;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	cs4265->format = iface;
+	return 0;
+}
+
+static int cs4265_mute(struct snd_soc_dai *dai, int mute, int direction)
+{
+	struct snd_soc_component *component = dai->component;
+
+	if (mute) {
+		snd_soc_component_update_bits(component, CS4265_DAC_CTL,
+			CS4265_DAC_CTL_MUTE,
+			CS4265_DAC_CTL_MUTE);
+		snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
+			CS4265_SPDIF_CTL2_MUTE,
+			CS4265_SPDIF_CTL2_MUTE);
+	} else {
+		snd_soc_component_update_bits(component, CS4265_DAC_CTL,
+			CS4265_DAC_CTL_MUTE,
+			0);
+		snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
+			CS4265_SPDIF_CTL2_MUTE,
+			0);
+	}
+	return 0;
+}
+
+static int cs4265_pcm_hw_params(struct snd_pcm_substream *substream,
+				     struct snd_pcm_hw_params *params,
+				     struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct cs4265_private *cs4265 = snd_soc_component_get_drvdata(component);
+	int index;
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
+		((cs4265->format & SND_SOC_DAIFMT_FORMAT_MASK)
+		== SND_SOC_DAIFMT_RIGHT_J))
+		return -EINVAL;
+
+	index = cs4265_get_clk_index(cs4265->sysclk, params_rate(params));
+	if (index >= 0) {
+		snd_soc_component_update_bits(component, CS4265_ADC_CTL,
+			CS4265_ADC_FM, clk_map_table[index].fm_mode << 6);
+		snd_soc_component_update_bits(component, CS4265_MCLK_FREQ,
+			CS4265_MCLK_FREQ_MASK,
+			clk_map_table[index].mclkdiv << 4);
+
+	} else {
+		dev_err(component->dev, "can't get correct mclk\n");
+		return -EINVAL;
+	}
+
+	switch (cs4265->format & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		snd_soc_component_update_bits(component, CS4265_DAC_CTL,
+			CS4265_DAC_CTL_DIF, (1 << 4));
+		snd_soc_component_update_bits(component, CS4265_ADC_CTL,
+			CS4265_ADC_DIF, (1 << 4));
+		snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
+			CS4265_SPDIF_CTL2_DIF, (1 << 6));
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		if (params_width(params) == 16) {
+			snd_soc_component_update_bits(component, CS4265_DAC_CTL,
+				CS4265_DAC_CTL_DIF, (2 << 4));
+			snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
+				CS4265_SPDIF_CTL2_DIF, (2 << 6));
+		} else {
+			snd_soc_component_update_bits(component, CS4265_DAC_CTL,
+				CS4265_DAC_CTL_DIF, (3 << 4));
+			snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
+				CS4265_SPDIF_CTL2_DIF, (3 << 6));
+		}
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		snd_soc_component_update_bits(component, CS4265_DAC_CTL,
+			CS4265_DAC_CTL_DIF, 0);
+		snd_soc_component_update_bits(component, CS4265_ADC_CTL,
+			CS4265_ADC_DIF, 0);
+		snd_soc_component_update_bits(component, CS4265_SPDIF_CTL2,
+			CS4265_SPDIF_CTL2_DIF, 0);
+
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int cs4265_set_bias_level(struct snd_soc_component *component,
+					enum snd_soc_bias_level level)
+{
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		snd_soc_component_update_bits(component, CS4265_PWRCTL,
+			CS4265_PWRCTL_PDN, 0);
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		snd_soc_component_update_bits(component, CS4265_PWRCTL,
+			CS4265_PWRCTL_PDN,
+			CS4265_PWRCTL_PDN);
+		break;
+	case SND_SOC_BIAS_OFF:
+		snd_soc_component_update_bits(component, CS4265_PWRCTL,
+			CS4265_PWRCTL_PDN,
+			CS4265_PWRCTL_PDN);
+		break;
+	}
+	return 0;
+}
+
+#define CS4265_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
+			SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | \
+			SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)
+
+#define CS4265_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE | \
+			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_U24_LE | \
+			SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_U32_LE)
+
+static const struct snd_soc_dai_ops cs4265_ops = {
+	.hw_params	= cs4265_pcm_hw_params,
+	.mute_stream	= cs4265_mute,
+	.set_fmt	= cs4265_set_fmt,
+	.set_sysclk	= cs4265_set_sysclk,
+	.no_capture_mute = 1,
+};
+
+static struct snd_soc_dai_driver cs4265_dai[] = {
+	{
+		.name = "cs4265-dai1",
+		.playback = {
+			.stream_name = "DAI1 Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = CS4265_RATES,
+			.formats = CS4265_FORMATS,
+		},
+		.capture = {
+			.stream_name = "DAI1 Capture",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = CS4265_RATES,
+			.formats = CS4265_FORMATS,
+		},
+		.ops = &cs4265_ops,
+	},
+	{
+		.name = "cs4265-dai2",
+		.playback = {
+			.stream_name = "DAI2 Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = CS4265_RATES,
+			.formats = CS4265_FORMATS,
+		},
+		.capture = {
+			.stream_name = "DAI2 Capture",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = CS4265_RATES,
+			.formats = CS4265_FORMATS,
+		},
+		.ops = &cs4265_ops,
+	},
+};
+
+static const struct snd_soc_component_driver soc_component_cs4265 = {
+	.set_bias_level		= cs4265_set_bias_level,
+	.controls		= cs4265_snd_controls,
+	.num_controls		= ARRAY_SIZE(cs4265_snd_controls),
+	.dapm_widgets		= cs4265_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(cs4265_dapm_widgets),
+	.dapm_routes		= cs4265_audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(cs4265_audio_map),
+	.idle_bias_on		= 1,
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+};
+
+static const struct regmap_config cs4265_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = CS4265_MAX_REGISTER,
+	.reg_defaults = cs4265_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(cs4265_reg_defaults),
+	.readable_reg = cs4265_readable_register,
+	.volatile_reg = cs4265_volatile_register,
+	.cache_type = REGCACHE_MAPLE,
+};
+
+static int cs4265_i2c_probe(struct i2c_client *i2c_client)
+{
+	struct cs4265_private *cs4265;
+	int ret;
+	unsigned int devid = 0;
+	unsigned int reg;
+
+	cs4265 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs4265_private),
+			       GFP_KERNEL);
+	if (cs4265 == NULL)
+		return -ENOMEM;
+
+	cs4265->regmap = devm_regmap_init_i2c(i2c_client, &cs4265_regmap);
+	if (IS_ERR(cs4265->regmap)) {
+		ret = PTR_ERR(cs4265->regmap);
+		dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
+		return ret;
+	}
+
+	cs4265->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev,
+		"reset", GPIOD_OUT_LOW);
+	if (IS_ERR(cs4265->reset_gpio))
+		return PTR_ERR(cs4265->reset_gpio);
+
+	if (cs4265->reset_gpio) {
+		mdelay(1);
+		gpiod_set_value_cansleep(cs4265->reset_gpio, 1);
+	}
+
+	i2c_set_clientdata(i2c_client, cs4265);
+
+	ret = regmap_read(cs4265->regmap, CS4265_CHIP_ID, &reg);
+	if (ret) {
+		dev_err(&i2c_client->dev, "Failed to read chip ID: %d\n", ret);
+		return ret;
+	}
+
+	devid = reg & CS4265_CHIP_ID_MASK;
+	if (devid != CS4265_CHIP_ID_VAL) {
+		ret = -ENODEV;
+		dev_err(&i2c_client->dev,
+			"CS4265 Part Number ID: 0x%x Expected: 0x%x\n",
+			devid >> 4, CS4265_CHIP_ID_VAL >> 4);
+		return ret;
+	}
+	dev_info(&i2c_client->dev,
+		"CS4265 Version %x\n",
+			reg & CS4265_REV_ID_MASK);
+
+	regmap_write(cs4265->regmap, CS4265_PWRCTL, 0x0F);
+
+	return devm_snd_soc_register_component(&i2c_client->dev,
+			&soc_component_cs4265, cs4265_dai,
+			ARRAY_SIZE(cs4265_dai));
+}
+
+static void cs4265_i2c_remove(struct i2c_client *i2c)
+{
+	struct cs4265_private *cs4265 = i2c_get_clientdata(i2c);
+
+	if (cs4265->reset_gpio)
+		gpiod_set_value_cansleep(cs4265->reset_gpio, 0);
+}
+
+static const struct of_device_id cs4265_of_match[] = {
+	{ .compatible = "cirrus,cs4265", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cs4265_of_match);
+
+static const struct i2c_device_id cs4265_id[] = {
+	{ .name = "cs4265" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, cs4265_id);
+
+static struct i2c_driver cs4265_i2c_driver = {
+	.driver = {
+		.name = "cs4265",
+		.of_match_table = cs4265_of_match,
+	},
+	.id_table = cs4265_id,
+	.probe =    cs4265_i2c_probe,
+	.remove =   cs4265_i2c_remove,
+};
+
+module_i2c_driver(cs4265_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC CS4265 driver");
+MODULE_AUTHOR("Paul Handrigan, Cirrus Logic Inc, <paul.handrigan@cirrus.com>");
+MODULE_LICENSE("GPL");