The only driver to enable SND_SOC_CS4270 was SND_SOC_MPC8610_HPCD, which
was dropped in the preceding commit. Remove the codec as unused.
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
---
sound/soc/codecs/Kconfig | 14 -
sound/soc/codecs/Makefile | 2 -
sound/soc/codecs/cs4270.c | 762 --------------------------------------
3 files changed, 778 deletions(-)
delete mode 100644 sound/soc/codecs/cs4270.c
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 3429419ca694..412540e0fced 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -85,7 +85,6 @@ config SND_SOC_ALL_CODECS
imply SND_SOC_CS42L73
imply SND_SOC_CS4234
imply SND_SOC_CS4265
- imply SND_SOC_CS4270
imply SND_SOC_CS4271_I2C
imply SND_SOC_CS4271_SPI
imply SND_SOC_CS42XX8_I2C
@@ -894,19 +893,6 @@ config SND_SOC_CS4265
depends on I2C
select REGMAP_I2C
-# Cirrus Logic CS4270 Codec
-config SND_SOC_CS4270
- tristate "Cirrus Logic CS4270 CODEC"
- depends on I2C
-
-# Cirrus Logic CS4270 Codec VD = 3.3V Errata
-# Select if you are affected by the errata where the part will not function
-# if MCLK divide-by-1.5 is selected and VD is set to 3.3V. The driver will
-# not select any sample rates that require MCLK to be divided by 1.5.
-config SND_SOC_CS4270_VD33_ERRATA
- bool
- depends on SND_SOC_CS4270
-
config SND_SOC_CS4271
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 2078bb0d981e..e762e2babc75 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -89,7 +89,6 @@ snd-soc-cs42l73-objs := cs42l73.o
snd-soc-cs42l83-i2c-objs := cs42l83-i2c.o
snd-soc-cs4234-objs := cs4234.o
snd-soc-cs4265-objs := cs4265.o
-snd-soc-cs4270-objs := cs4270.o
snd-soc-cs4271-objs := cs4271.o
snd-soc-cs4271-i2c-objs := cs4271-i2c.o
snd-soc-cs4271-spi-objs := cs4271-spi.o
@@ -478,7 +477,6 @@ obj-$(CONFIG_SND_SOC_CS42L73) += snd-soc-cs42l73.o
obj-$(CONFIG_SND_SOC_CS42L83) += snd-soc-cs42l83-i2c.o
obj-$(CONFIG_SND_SOC_CS4234) += snd-soc-cs4234.o
obj-$(CONFIG_SND_SOC_CS4265) += snd-soc-cs4265.o
-obj-$(CONFIG_SND_SOC_CS4270) += snd-soc-cs4270.o
obj-$(CONFIG_SND_SOC_CS4271) += snd-soc-cs4271.o
obj-$(CONFIG_SND_SOC_CS4271_I2C) += snd-soc-cs4271-i2c.o
obj-$(CONFIG_SND_SOC_CS4271_SPI) += snd-soc-cs4271-spi.o
diff --git a/sound/soc/codecs/cs4270.c b/sound/soc/codecs/cs4270.c
deleted file mode 100644
index 3bbb90c827f2..000000000000
--- a/sound/soc/codecs/cs4270.c
+++ /dev/null
@@ -1,762 +0,0 @@
-/*
- * CS4270 ALSA SoC (ASoC) codec driver
- *
- * Author: Timur Tabi <timur@xxxxxxxxxxxxx>
- *
- * Copyright 2007-2009 Freescale Semiconductor, Inc. This file is licensed
- * under the terms of the GNU General Public License version 2. This
- * program is licensed "as is" without any warranty of any kind, whether
- * express or implied.
- *
- * This is an ASoC device driver for the Cirrus Logic CS4270 codec.
- *
- * Current features/limitations:
- *
- * - Software mode is supported. Stand-alone mode is not supported.
- * - Only I2C is supported, not SPI
- * - Support for master and slave mode
- * - The machine driver's 'startup' function must call
- * cs4270_set_dai_sysclk() with the value of MCLK.
- * - Only I2S and left-justified modes are supported
- * - Power management is supported
- */
-
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <sound/core.h>
-#include <sound/soc.h>
-#include <sound/initval.h>
-#include <linux/i2c.h>
-#include <linux/delay.h>
-#include <linux/regulator/consumer.h>
-#include <linux/gpio/consumer.h>
-
-#define CS4270_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
- SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE | \
- SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE)
-
-/* CS4270 registers addresses */
-#define CS4270_CHIPID 0x01 /* Chip ID */
-#define CS4270_PWRCTL 0x02 /* Power Control */
-#define CS4270_MODE 0x03 /* Mode Control */
-#define CS4270_FORMAT 0x04 /* Serial Format, ADC/DAC Control */
-#define CS4270_TRANS 0x05 /* Transition Control */
-#define CS4270_MUTE 0x06 /* Mute Control */
-#define CS4270_VOLA 0x07 /* DAC Channel A Volume Control */
-#define CS4270_VOLB 0x08 /* DAC Channel B Volume Control */
-
-#define CS4270_FIRSTREG 0x01
-#define CS4270_LASTREG 0x08
-#define CS4270_NUMREGS (CS4270_LASTREG - CS4270_FIRSTREG + 1)
-#define CS4270_I2C_INCR 0x80
-
-/* Bit masks for the CS4270 registers */
-#define CS4270_CHIPID_ID 0xF0
-#define CS4270_CHIPID_REV 0x0F
-#define CS4270_PWRCTL_FREEZE 0x80
-#define CS4270_PWRCTL_PDN_ADC 0x20
-#define CS4270_PWRCTL_PDN_DAC 0x02
-#define CS4270_PWRCTL_PDN 0x01
-#define CS4270_PWRCTL_PDN_ALL \
- (CS4270_PWRCTL_PDN_ADC | CS4270_PWRCTL_PDN_DAC | CS4270_PWRCTL_PDN)
-#define CS4270_MODE_SPEED_MASK 0x30
-#define CS4270_MODE_1X 0x00
-#define CS4270_MODE_2X 0x10
-#define CS4270_MODE_4X 0x20
-#define CS4270_MODE_SLAVE 0x30
-#define CS4270_MODE_DIV_MASK 0x0E
-#define CS4270_MODE_DIV1 0x00
-#define CS4270_MODE_DIV15 0x02
-#define CS4270_MODE_DIV2 0x04
-#define CS4270_MODE_DIV3 0x06
-#define CS4270_MODE_DIV4 0x08
-#define CS4270_MODE_POPGUARD 0x01
-#define CS4270_FORMAT_FREEZE_A 0x80
-#define CS4270_FORMAT_FREEZE_B 0x40
-#define CS4270_FORMAT_LOOPBACK 0x20
-#define CS4270_FORMAT_DAC_MASK 0x18
-#define CS4270_FORMAT_DAC_LJ 0x00
-#define CS4270_FORMAT_DAC_I2S 0x08
-#define CS4270_FORMAT_DAC_RJ16 0x18
-#define CS4270_FORMAT_DAC_RJ24 0x10
-#define CS4270_FORMAT_ADC_MASK 0x01
-#define CS4270_FORMAT_ADC_LJ 0x00
-#define CS4270_FORMAT_ADC_I2S 0x01
-#define CS4270_TRANS_ONE_VOL 0x80
-#define CS4270_TRANS_SOFT 0x40
-#define CS4270_TRANS_ZERO 0x20
-#define CS4270_TRANS_INV_ADC_A 0x08
-#define CS4270_TRANS_INV_ADC_B 0x10
-#define CS4270_TRANS_INV_DAC_A 0x02
-#define CS4270_TRANS_INV_DAC_B 0x04
-#define CS4270_TRANS_DEEMPH 0x01
-#define CS4270_MUTE_AUTO 0x20
-#define CS4270_MUTE_ADC_A 0x08
-#define CS4270_MUTE_ADC_B 0x10
-#define CS4270_MUTE_POLARITY 0x04
-#define CS4270_MUTE_DAC_A 0x01
-#define CS4270_MUTE_DAC_B 0x02
-
-/* Power-on default values for the registers
- *
- * This array contains the power-on default values of the registers, with the
- * exception of the "CHIPID" register (01h). The lower four bits of that
- * register contain the hardware revision, so it is treated as volatile.
- */
-static const struct reg_default cs4270_reg_defaults[] = {
- { 2, 0x00 },
- { 3, 0x30 },
- { 4, 0x00 },
- { 5, 0x60 },
- { 6, 0x20 },
- { 7, 0x00 },
- { 8, 0x00 },
-};
-
-static const char *supply_names[] = {
- "va", "vd", "vlc"
-};
-
-/* Private data for the CS4270 */
-struct cs4270_private {
- struct regmap *regmap;
- unsigned int mclk; /* Input frequency of the MCLK pin */
- unsigned int mode; /* The mode (I2S or left-justified) */
- unsigned int slave_mode;
- unsigned int manual_mute;
-
- /* power domain regulators */
- struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
-
- /* reset gpio */
- struct gpio_desc *reset_gpio;
-};
-
-static const struct snd_soc_dapm_widget cs4270_dapm_widgets[] = {
-SND_SOC_DAPM_INPUT("AINL"),
-SND_SOC_DAPM_INPUT("AINR"),
-
-SND_SOC_DAPM_OUTPUT("AOUTL"),
-SND_SOC_DAPM_OUTPUT("AOUTR"),
-};
-
-static const struct snd_soc_dapm_route cs4270_dapm_routes[] = {
- { "Capture", NULL, "AINL" },
- { "Capture", NULL, "AINR" },
-
- { "AOUTL", NULL, "Playback" },
- { "AOUTR", NULL, "Playback" },
-};
-
-/**
- * struct cs4270_mode_ratios - clock ratio tables
- * @ratio: the ratio of MCLK to the sample rate
- * @speed_mode: the Speed Mode bits to set in the Mode Control register for
- * this ratio
- * @mclk: the Ratio Select bits to set in the Mode Control register for this
- * ratio
- *
- * The data for this chart is taken from Table 5 of the CS4270 reference
- * manual.
- *
- * This table is used to determine how to program the Mode Control register.
- * It is also used by cs4270_set_dai_sysclk() to tell ALSA which sampling
- * rates the CS4270 currently supports.
- *
- * @speed_mode is the corresponding bit pattern to be written to the
- * MODE bits of the Mode Control Register
- *
- * @mclk is the corresponding bit pattern to be wirten to the MCLK bits of
- * the Mode Control Register.
- *
- * In situations where a single ratio is represented by multiple speed
- * modes, we favor the slowest speed. E.g, for a ratio of 128, we pick
- * double-speed instead of quad-speed. However, the CS4270 errata states
- * that divide-By-1.5 can cause failures, so we avoid that mode where
- * possible.
- *
- * Errata: There is an errata for the CS4270 where divide-by-1.5 does not
- * work if Vd is 3.3V. If this effects you, select the
- * CONFIG_SND_SOC_CS4270_VD33_ERRATA Kconfig option, and the driver will
- * never select any sample rates that require divide-by-1.5.
- */
-struct cs4270_mode_ratios {
- unsigned int ratio;
- u8 speed_mode;
- u8 mclk;
-};
-
-static struct cs4270_mode_ratios cs4270_mode_ratios[] = {
- {64, CS4270_MODE_4X, CS4270_MODE_DIV1},
-#ifndef CONFIG_SND_SOC_CS4270_VD33_ERRATA
- {96, CS4270_MODE_4X, CS4270_MODE_DIV15},
-#endif
- {128, CS4270_MODE_2X, CS4270_MODE_DIV1},
- {192, CS4270_MODE_4X, CS4270_MODE_DIV3},
- {256, CS4270_MODE_1X, CS4270_MODE_DIV1},
- {384, CS4270_MODE_2X, CS4270_MODE_DIV3},
- {512, CS4270_MODE_1X, CS4270_MODE_DIV2},
- {768, CS4270_MODE_1X, CS4270_MODE_DIV3},
- {1024, CS4270_MODE_1X, CS4270_MODE_DIV4}
-};
-
-/* The number of MCLK/LRCK ratios supported by the CS4270 */
-#define NUM_MCLK_RATIOS ARRAY_SIZE(cs4270_mode_ratios)
-
-static bool cs4270_reg_is_readable(struct device *dev, unsigned int reg)
-{
- return (reg >= CS4270_FIRSTREG) && (reg <= CS4270_LASTREG);
-}
-
-static bool cs4270_reg_is_volatile(struct device *dev, unsigned int reg)
-{
- /* Unreadable registers are considered volatile */
- if ((reg < CS4270_FIRSTREG) || (reg > CS4270_LASTREG))
- return true;
-
- return reg == CS4270_CHIPID;
-}
-
-/**
- * cs4270_set_dai_sysclk - determine the CS4270 samples rates.
- * @codec_dai: the codec DAI
- * @clk_id: the clock ID (ignored)
- * @freq: the MCLK input frequency
- * @dir: the clock direction (ignored)
- *
- * This function is used to tell the codec driver what the input MCLK
- * frequency is.
- *
- * The value of MCLK is used to determine which sample rates are supported
- * by the CS4270. The ratio of MCLK / Fs must be equal to one of nine
- * supported values - 64, 96, 128, 192, 256, 384, 512, 768, and 1024.
- *
- * This function calculates the nine ratios and determines which ones match
- * a standard sample rate. If there's a match, then it is added to the list
- * of supported sample rates.
- *
- * This function must be called by the machine driver's 'startup' function,
- * otherwise the list of supported sample rates will not be available in
- * time for ALSA.
- *
- * For setups with variable MCLKs, pass 0 as 'freq' argument. This will cause
- * theoretically possible sample rates to be enabled. Call it again with a
- * proper value set one the external clock is set (most probably you would do
- * that from a machine's driver 'hw_param' hook.
- */
-static int cs4270_set_dai_sysclk(struct snd_soc_dai *codec_dai,
- int clk_id, unsigned int freq, int dir)
-{
- struct snd_soc_component *component = codec_dai->component;
- struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
-
- cs4270->mclk = freq;
- return 0;
-}
-
-/**
- * cs4270_set_dai_fmt - configure the codec for the selected audio format
- * @codec_dai: the codec DAI
- * @format: a SND_SOC_DAIFMT_x value indicating the data format
- *
- * This function takes a bitmask of SND_SOC_DAIFMT_x bits and programs the
- * codec accordingly.
- *
- * Currently, this function only supports SND_SOC_DAIFMT_I2S and
- * SND_SOC_DAIFMT_LEFT_J. The CS4270 codec also supports right-justified
- * data for playback only, but ASoC currently does not support different
- * formats for playback vs. record.
- */
-static int cs4270_set_dai_fmt(struct snd_soc_dai *codec_dai,
- unsigned int format)
-{
- struct snd_soc_component *component = codec_dai->component;
- struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
-
- /* set DAI format */
- switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
- case SND_SOC_DAIFMT_I2S:
- case SND_SOC_DAIFMT_LEFT_J:
- cs4270->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
- break;
- default:
- dev_err(component->dev, "invalid dai format\n");
- return -EINVAL;
- }
-
- /* set master/slave audio interface */
- switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
- case SND_SOC_DAIFMT_CBS_CFS:
- cs4270->slave_mode = 1;
- break;
- case SND_SOC_DAIFMT_CBM_CFM:
- cs4270->slave_mode = 0;
- break;
- default:
- /* all other modes are unsupported by the hardware */
- dev_err(component->dev, "Unknown master/slave configuration\n");
- return -EINVAL;
- }
-
- return 0;
-}
-
-/**
- * cs4270_hw_params - program the CS4270 with the given hardware parameters.
- * @substream: the audio stream
- * @params: the hardware parameters to set
- * @dai: the SOC DAI (ignored)
- *
- * This function programs the hardware with the values provided.
- * Specifically, the sample rate and the data format.
- *
- * The .ops functions are used to provide board-specific data, like input
- * frequencies, to this driver. This function takes that information,
- * combines it with the hardware parameters provided, and programs the
- * hardware accordingly.
- */
-static int cs4270_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 cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
- int ret;
- unsigned int i;
- unsigned int rate;
- unsigned int ratio;
- int reg;
-
- /* Figure out which MCLK/LRCK ratio to use */
-
- rate = params_rate(params); /* Sampling rate, in Hz */
- ratio = cs4270->mclk / rate; /* MCLK/LRCK ratio */
-
- for (i = 0; i < NUM_MCLK_RATIOS; i++) {
- if (cs4270_mode_ratios[i].ratio == ratio)
- break;
- }
-
- if (i == NUM_MCLK_RATIOS) {
- /* We did not find a matching ratio */
- dev_err(component->dev, "could not find matching ratio\n");
- return -EINVAL;
- }
-
- /* Set the sample rate */
-
- reg = snd_soc_component_read(component, CS4270_MODE);
- reg &= ~(CS4270_MODE_SPEED_MASK | CS4270_MODE_DIV_MASK);
- reg |= cs4270_mode_ratios[i].mclk;
-
- if (cs4270->slave_mode)
- reg |= CS4270_MODE_SLAVE;
- else
- reg |= cs4270_mode_ratios[i].speed_mode;
-
- ret = snd_soc_component_write(component, CS4270_MODE, reg);
- if (ret < 0) {
- dev_err(component->dev, "i2c write failed\n");
- return ret;
- }
-
- /* Set the DAI format */
-
- reg = snd_soc_component_read(component, CS4270_FORMAT);
- reg &= ~(CS4270_FORMAT_DAC_MASK | CS4270_FORMAT_ADC_MASK);
-
- switch (cs4270->mode) {
- case SND_SOC_DAIFMT_I2S:
- reg |= CS4270_FORMAT_DAC_I2S | CS4270_FORMAT_ADC_I2S;
- break;
- case SND_SOC_DAIFMT_LEFT_J:
- reg |= CS4270_FORMAT_DAC_LJ | CS4270_FORMAT_ADC_LJ;
- break;
- default:
- dev_err(component->dev, "unknown dai format\n");
- return -EINVAL;
- }
-
- ret = snd_soc_component_write(component, CS4270_FORMAT, reg);
- if (ret < 0) {
- dev_err(component->dev, "i2c write failed\n");
- return ret;
- }
-
- return ret;
-}
-
-/**
- * cs4270_dai_mute - enable/disable the CS4270 external mute
- * @dai: the SOC DAI
- * @mute: 0 = disable mute, 1 = enable mute
- * @direction: (ignored)
- *
- * This function toggles the mute bits in the MUTE register. The CS4270's
- * mute capability is intended for external muting circuitry, so if the
- * board does not have the MUTEA or MUTEB pins connected to such circuitry,
- * then this function will do nothing.
- */
-static int cs4270_dai_mute(struct snd_soc_dai *dai, int mute, int direction)
-{
- struct snd_soc_component *component = dai->component;
- struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
- int reg6;
-
- reg6 = snd_soc_component_read(component, CS4270_MUTE);
-
- if (mute)
- reg6 |= CS4270_MUTE_DAC_A | CS4270_MUTE_DAC_B;
- else {
- reg6 &= ~(CS4270_MUTE_DAC_A | CS4270_MUTE_DAC_B);
- reg6 |= cs4270->manual_mute;
- }
-
- return snd_soc_component_write(component, CS4270_MUTE, reg6);
-}
-
-/**
- * cs4270_soc_put_mute - put callback for the 'Master Playback switch'
- * alsa control.
- * @kcontrol: mixer control
- * @ucontrol: control element information
- *
- * This function basically passes the arguments on to the generic
- * snd_soc_put_volsw() function and saves the mute information in
- * our private data structure. This is because we want to prevent
- * cs4270_dai_mute() neglecting the user's decision to manually
- * mute the codec's output.
- *
- * Returns 0 for success.
- */
-static int cs4270_soc_put_mute(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
- struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
- int left = !ucontrol->value.integer.value[0];
- int right = !ucontrol->value.integer.value[1];
-
- cs4270->manual_mute = (left ? CS4270_MUTE_DAC_A : 0) |
- (right ? CS4270_MUTE_DAC_B : 0);
-
- return snd_soc_put_volsw(kcontrol, ucontrol);
-}
-
-/* A list of non-DAPM controls that the CS4270 supports */
-static const struct snd_kcontrol_new cs4270_snd_controls[] = {
- SOC_DOUBLE_R("Master Playback Volume",
- CS4270_VOLA, CS4270_VOLB, 0, 0xFF, 1),
- SOC_SINGLE("Digital Sidetone Switch", CS4270_FORMAT, 5, 1, 0),
- SOC_SINGLE("Soft Ramp Switch", CS4270_TRANS, 6, 1, 0),
- SOC_SINGLE("Zero Cross Switch", CS4270_TRANS, 5, 1, 0),
- SOC_SINGLE("De-emphasis filter", CS4270_TRANS, 0, 1, 0),
- SOC_SINGLE("Popguard Switch", CS4270_MODE, 0, 1, 1),
- SOC_SINGLE("Auto-Mute Switch", CS4270_MUTE, 5, 1, 0),
- SOC_DOUBLE("Master Capture Switch", CS4270_MUTE, 3, 4, 1, 1),
- SOC_DOUBLE_EXT("Master Playback Switch", CS4270_MUTE, 0, 1, 1, 1,
- snd_soc_get_volsw, cs4270_soc_put_mute),
-};
-
-static const struct snd_soc_dai_ops cs4270_dai_ops = {
- .hw_params = cs4270_hw_params,
- .set_sysclk = cs4270_set_dai_sysclk,
- .set_fmt = cs4270_set_dai_fmt,
- .mute_stream = cs4270_dai_mute,
- .no_capture_mute = 1,
-};
-
-static struct snd_soc_dai_driver cs4270_dai = {
- .name = "cs4270-hifi",
- .playback = {
- .stream_name = "Playback",
- .channels_min = 2,
- .channels_max = 2,
- .rates = SNDRV_PCM_RATE_CONTINUOUS,
- .rate_min = 4000,
- .rate_max = 216000,
- .formats = CS4270_FORMATS,
- },
- .capture = {
- .stream_name = "Capture",
- .channels_min = 2,
- .channels_max = 2,
- .rates = SNDRV_PCM_RATE_CONTINUOUS,
- .rate_min = 4000,
- .rate_max = 216000,
- .formats = CS4270_FORMATS,
- },
- .ops = &cs4270_dai_ops,
-};
-
-/**
- * cs4270_probe - ASoC probe function
- * @component: ASoC component
- *
- * This function is called when ASoC has all the pieces it needs to
- * instantiate a sound driver.
- */
-static int cs4270_probe(struct snd_soc_component *component)
-{
- struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
- int ret;
-
- /* Disable auto-mute. This feature appears to be buggy. In some
- * situations, auto-mute will not deactivate when it should, so we want
- * this feature disabled by default. An application (e.g. alsactl) can
- * re-enabled it by using the controls.
- */
- ret = snd_soc_component_update_bits(component, CS4270_MUTE, CS4270_MUTE_AUTO, 0);
- if (ret < 0) {
- dev_err(component->dev, "i2c write failed\n");
- return ret;
- }
-
- /* Disable automatic volume control. The hardware enables, and it
- * causes volume change commands to be delayed, sometimes until after
- * playback has started. An application (e.g. alsactl) can
- * re-enabled it by using the controls.
- */
- ret = snd_soc_component_update_bits(component, CS4270_TRANS,
- CS4270_TRANS_SOFT | CS4270_TRANS_ZERO, 0);
- if (ret < 0) {
- dev_err(component->dev, "i2c write failed\n");
- return ret;
- }
-
- ret = regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
- cs4270->supplies);
-
- return ret;
-}
-
-/**
- * cs4270_remove - ASoC remove function
- * @component: ASoC component
- *
- * This function is the counterpart to cs4270_probe().
- */
-static void cs4270_remove(struct snd_soc_component *component)
-{
- struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
-
- regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies), cs4270->supplies);
-};
-
-#ifdef CONFIG_PM
-
-/* This suspend/resume implementation can handle both - a simple standby
- * where the codec remains powered, and a full suspend, where the voltage
- * domain the codec is connected to is teared down and/or any other hardware
- * reset condition is asserted.
- *
- * The codec's own power saving features are enabled in the suspend callback,
- * and all registers are written back to the hardware when resuming.
- */
-
-static int cs4270_soc_suspend(struct snd_soc_component *component)
-{
- struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
- int reg, ret;
-
- reg = snd_soc_component_read(component, CS4270_PWRCTL) | CS4270_PWRCTL_PDN_ALL;
- if (reg < 0)
- return reg;
-
- ret = snd_soc_component_write(component, CS4270_PWRCTL, reg);
- if (ret < 0)
- return ret;
-
- regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies),
- cs4270->supplies);
-
- return 0;
-}
-
-static int cs4270_soc_resume(struct snd_soc_component *component)
-{
- struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
- int reg, ret;
-
- ret = regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
- cs4270->supplies);
- if (ret != 0)
- return ret;
-
- /* In case the device was put to hard reset during sleep, we need to
- * wait 500ns here before any I2C communication. */
- ndelay(500);
-
- /* first restore the entire register cache ... */
- regcache_sync(cs4270->regmap);
-
- /* ... then disable the power-down bits */
- reg = snd_soc_component_read(component, CS4270_PWRCTL);
- reg &= ~CS4270_PWRCTL_PDN_ALL;
-
- return snd_soc_component_write(component, CS4270_PWRCTL, reg);
-}
-#else
-#define cs4270_soc_suspend NULL
-#define cs4270_soc_resume NULL
-#endif /* CONFIG_PM */
-
-/*
- * ASoC codec driver structure
- */
-static const struct snd_soc_component_driver soc_component_device_cs4270 = {
- .probe = cs4270_probe,
- .remove = cs4270_remove,
- .suspend = cs4270_soc_suspend,
- .resume = cs4270_soc_resume,
- .controls = cs4270_snd_controls,
- .num_controls = ARRAY_SIZE(cs4270_snd_controls),
- .dapm_widgets = cs4270_dapm_widgets,
- .num_dapm_widgets = ARRAY_SIZE(cs4270_dapm_widgets),
- .dapm_routes = cs4270_dapm_routes,
- .num_dapm_routes = ARRAY_SIZE(cs4270_dapm_routes),
- .idle_bias_on = 1,
- .use_pmdown_time = 1,
- .endianness = 1,
-};
-
-/*
- * cs4270_of_match - the device tree bindings
- */
-static const struct of_device_id cs4270_of_match[] = {
- { .compatible = "cirrus,cs4270", },
- { }
-};
-MODULE_DEVICE_TABLE(of, cs4270_of_match);
-
-static const struct regmap_config cs4270_regmap = {
- .reg_bits = 8,
- .val_bits = 8,
- .max_register = CS4270_LASTREG,
- .reg_defaults = cs4270_reg_defaults,
- .num_reg_defaults = ARRAY_SIZE(cs4270_reg_defaults),
- .cache_type = REGCACHE_MAPLE,
- .write_flag_mask = CS4270_I2C_INCR,
-
- .readable_reg = cs4270_reg_is_readable,
- .volatile_reg = cs4270_reg_is_volatile,
-};
-
-/**
- * cs4270_i2c_remove - deinitialize the I2C interface of the CS4270
- * @i2c_client: the I2C client object
- *
- * This function puts the chip into low power mode when the i2c device
- * is removed.
- */
-static void cs4270_i2c_remove(struct i2c_client *i2c_client)
-{
- struct cs4270_private *cs4270 = i2c_get_clientdata(i2c_client);
-
- gpiod_set_value_cansleep(cs4270->reset_gpio, 0);
-}
-
-/**
- * cs4270_i2c_probe - initialize the I2C interface of the CS4270
- * @i2c_client: the I2C client object
- *
- * This function is called whenever the I2C subsystem finds a device that
- * matches the device ID given via a prior call to i2c_add_driver().
- */
-static int cs4270_i2c_probe(struct i2c_client *i2c_client)
-{
- struct cs4270_private *cs4270;
- unsigned int val;
- int ret, i;
-
- cs4270 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs4270_private),
- GFP_KERNEL);
- if (!cs4270)
- return -ENOMEM;
-
- /* get the power supply regulators */
- for (i = 0; i < ARRAY_SIZE(supply_names); i++)
- cs4270->supplies[i].supply = supply_names[i];
-
- ret = devm_regulator_bulk_get(&i2c_client->dev,
- ARRAY_SIZE(cs4270->supplies),
- cs4270->supplies);
- if (ret < 0)
- return ret;
-
- /* reset the device */
- cs4270->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev, "reset",
- GPIOD_OUT_LOW);
- if (IS_ERR(cs4270->reset_gpio)) {
- dev_dbg(&i2c_client->dev, "Error getting CS4270 reset GPIO\n");
- return PTR_ERR(cs4270->reset_gpio);
- }
-
- if (cs4270->reset_gpio) {
- dev_dbg(&i2c_client->dev, "Found reset GPIO\n");
- gpiod_set_value_cansleep(cs4270->reset_gpio, 1);
- }
-
- /* Sleep 500ns before i2c communications */
- ndelay(500);
-
- cs4270->regmap = devm_regmap_init_i2c(i2c_client, &cs4270_regmap);
- if (IS_ERR(cs4270->regmap))
- return PTR_ERR(cs4270->regmap);
-
- /* Verify that we have a CS4270 */
- ret = regmap_read(cs4270->regmap, CS4270_CHIPID, &val);
- if (ret < 0) {
- dev_err(&i2c_client->dev, "failed to read i2c at addr %X\n",
- i2c_client->addr);
- return ret;
- }
- /* The top four bits of the chip ID should be 1100. */
- if ((val & 0xF0) != 0xC0) {
- dev_err(&i2c_client->dev, "device at addr %X is not a CS4270\n",
- i2c_client->addr);
- return -ENODEV;
- }
-
- dev_info(&i2c_client->dev, "found device at i2c address %X\n",
- i2c_client->addr);
- dev_info(&i2c_client->dev, "hardware revision %X\n", val & 0xF);
-
- i2c_set_clientdata(i2c_client, cs4270);
-
- ret = devm_snd_soc_register_component(&i2c_client->dev,
- &soc_component_device_cs4270, &cs4270_dai, 1);
- return ret;
-}
-
-/*
- * cs4270_id - I2C device IDs supported by this driver
- */
-static const struct i2c_device_id cs4270_id[] = {
- {"cs4270", 0},
- {}
-};
-MODULE_DEVICE_TABLE(i2c, cs4270_id);
-
-/*
- * cs4270_i2c_driver - I2C device identification
- *
- * This structure tells the I2C subsystem how to identify and support a
- * given I2C device type.
- */
-static struct i2c_driver cs4270_i2c_driver = {
- .driver = {
- .name = "cs4270",
- .of_match_table = cs4270_of_match,
- },
- .id_table = cs4270_id,
- .probe = cs4270_i2c_probe,
- .remove = cs4270_i2c_remove,
-};
-
-module_i2c_driver(cs4270_i2c_driver);
-
-MODULE_AUTHOR("Timur Tabi <timur@xxxxxxxxxxxxx>");
-MODULE_DESCRIPTION("Cirrus Logic CS4270 ALSA SoC Codec Driver");
-MODULE_LICENSE("GPL");
--
2.41.0
