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ASoC: cs35l41: CS35L41 Boosted Smart Amplifier
SoC Audio driver for the Cirrus Logic CS35L41 amplifier Signed-off-by: David Rhodes <drhodes@opensource.cirrus.com> Tested-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://lore.kernel.org/r/20210907225719.2018115-2-drhodes@opensource.cirrus.com Signed-off-by: Mark Brown <broonie@kernel.org>
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‎include/sound/cs35l41.h‎

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/* SPDX-License-Identifier: GPL-2.0
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*
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* linux/sound/cs35l41.h -- Platform data for CS35L41
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*
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* Copyright (c) 2017-2021 Cirrus Logic Inc.
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*
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* Author: David Rhodes <david.rhodes@cirrus.com>
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*/
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#ifndef __CS35L41_H
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#define __CS35L41_H
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enum cs35l41_clk_ids {
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CS35L41_CLKID_SCLK = 0,
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CS35L41_CLKID_LRCLK = 1,
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CS35L41_CLKID_MCLK = 4,
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};
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struct cs35l41_irq_cfg {
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bool irq_pol_inv;
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bool irq_out_en;
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int irq_src_sel;
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};
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struct cs35l41_platform_data {
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int bst_ind;
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int bst_ipk;
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int bst_cap;
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int dout_hiz;
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struct cs35l41_irq_cfg irq_config1;
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struct cs35l41_irq_cfg irq_config2;
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};
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#endif /* __CS35L41_H */

‎sound/soc/codecs/Kconfig‎

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@@ -61,6 +61,8 @@ config SND_SOC_ALL_CODECS
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imply SND_SOC_CS35L34
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imply SND_SOC_CS35L35
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imply SND_SOC_CS35L36
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imply SND_SOC_CS35L41_SPI
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imply SND_SOC_CS35L41_I2C
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imply SND_SOC_CS42L42
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imply SND_SOC_CS42L51_I2C
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imply SND_SOC_CS42L52
@@ -602,6 +604,16 @@ config SND_SOC_CS35L36
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tristate "Cirrus Logic CS35L36 CODEC"
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depends on I2C
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config SND_SOC_CS35L41_SPI
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tristate "Cirrus Logic CS35L41 CODEC (SPI)"
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depends on SPI_MASTER
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select REGMAP_SPI
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config SND_SOC_CS35L41_I2C
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tristate "Cirrus Logic CS35L41 CODEC (I2C)"
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depends on I2C
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select REGMAP_I2C
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config SND_SOC_CS42L42
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tristate "Cirrus Logic CS42L42 CODEC"
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depends on I2C

‎sound/soc/codecs/Makefile‎

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@@ -54,6 +54,8 @@ snd-soc-cs35l33-objs := cs35l33.o
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snd-soc-cs35l34-objs := cs35l34.o
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snd-soc-cs35l35-objs := cs35l35.o
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snd-soc-cs35l36-objs := cs35l36.o
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snd-soc-cs35l41-spi-objs := cs35l41-spi.o cs35l41.o cs35l41-tables.o
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snd-soc-cs35l41-i2c-objs := cs35l41-i2c.o cs35l41.o cs35l41-tables.o
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snd-soc-cs42l42-objs := cs42l42.o
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snd-soc-cs42l51-objs := cs42l51.o
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snd-soc-cs42l51-i2c-objs := cs42l51-i2c.o
@@ -385,6 +387,8 @@ obj-$(CONFIG_SND_SOC_CS35L33) += snd-soc-cs35l33.o
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obj-$(CONFIG_SND_SOC_CS35L34) += snd-soc-cs35l34.o
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obj-$(CONFIG_SND_SOC_CS35L35) += snd-soc-cs35l35.o
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obj-$(CONFIG_SND_SOC_CS35L36) += snd-soc-cs35l36.o
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obj-$(CONFIG_SND_SOC_CS35L41_SPI) += snd-soc-cs35l41-spi.o
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obj-$(CONFIG_SND_SOC_CS35L41_I2C) += snd-soc-cs35l41-i2c.o
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obj-$(CONFIG_SND_SOC_CS42L42) += snd-soc-cs42l42.o
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obj-$(CONFIG_SND_SOC_CS42L51) += snd-soc-cs42l51.o
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obj-$(CONFIG_SND_SOC_CS42L51_I2C) += snd-soc-cs42l51-i2c.o

‎sound/soc/codecs/cs35l41-i2c.c‎

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// SPDX-License-Identifier: GPL-2.0
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//
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// cs35l41-i2c.c -- CS35l41 I2C driver
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//
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// Copyright 2017-2021 Cirrus Logic, Inc.
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//
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// Author: David Rhodes <david.rhodes@cirrus.com>
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <sound/cs35l41.h>
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#include "cs35l41.h"
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static struct regmap_config cs35l41_regmap_i2c = {
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.reg_bits = 32,
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.val_bits = 32,
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.reg_stride = CS35L41_REGSTRIDE,
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.reg_format_endian = REGMAP_ENDIAN_BIG,
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.val_format_endian = REGMAP_ENDIAN_BIG,
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.max_register = CS35L41_LASTREG,
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.reg_defaults = cs35l41_reg,
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.num_reg_defaults = ARRAY_SIZE(cs35l41_reg),
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.volatile_reg = cs35l41_volatile_reg,
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.readable_reg = cs35l41_readable_reg,
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.precious_reg = cs35l41_precious_reg,
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.cache_type = REGCACHE_RBTREE,
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};
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static const struct i2c_device_id cs35l41_id_i2c[] = {
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{ "cs35l40", 0 },
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{ "cs35l41", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c);
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static int cs35l41_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct cs35l41_private *cs35l41;
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struct device *dev = &client->dev;
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struct cs35l41_platform_data *pdata = dev_get_platdata(dev);
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const struct regmap_config *regmap_config = &cs35l41_regmap_i2c;
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int ret;
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cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL);
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if (!cs35l41)
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return -ENOMEM;
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cs35l41->dev = dev;
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cs35l41->irq = client->irq;
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i2c_set_clientdata(client, cs35l41);
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cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config);
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if (IS_ERR(cs35l41->regmap)) {
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ret = PTR_ERR(cs35l41->regmap);
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dev_err(cs35l41->dev, "Failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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return cs35l41_probe(cs35l41, pdata);
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}
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static int cs35l41_i2c_remove(struct i2c_client *client)
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{
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struct cs35l41_private *cs35l41 = i2c_get_clientdata(client);
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return cs35l41_remove(cs35l41);
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}
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#ifdef CONFIG_OF
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static const struct of_device_id cs35l41_of_match[] = {
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{ .compatible = "cirrus,cs35l40" },
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{ .compatible = "cirrus,cs35l41" },
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{},
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};
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MODULE_DEVICE_TABLE(of, cs35l41_of_match);
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#endif
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id cs35l41_acpi_match[] = {
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{ "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
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{},
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};
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MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
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#endif
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static struct i2c_driver cs35l41_i2c_driver = {
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.driver = {
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.name = "cs35l41",
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.of_match_table = of_match_ptr(cs35l41_of_match),
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.acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
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},
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.id_table = cs35l41_id_i2c,
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.probe = cs35l41_i2c_probe,
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.remove = cs35l41_i2c_remove,
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};
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module_i2c_driver(cs35l41_i2c_driver);
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MODULE_DESCRIPTION("I2C CS35L41 driver");
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MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
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MODULE_LICENSE("GPL");

‎sound/soc/codecs/cs35l41-spi.c‎

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// SPDX-License-Identifier: GPL-2.0
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//
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// cs35l41-spi.c -- CS35l41 SPI driver
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//
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// Copyright 2017-2021 Cirrus Logic, Inc.
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//
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// Author: David Rhodes <david.rhodes@cirrus.com>
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#include <sound/cs35l41.h>
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#include "cs35l41.h"
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static struct regmap_config cs35l41_regmap_spi = {
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.reg_bits = 32,
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.val_bits = 32,
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.pad_bits = 16,
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.reg_stride = CS35L41_REGSTRIDE,
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.reg_format_endian = REGMAP_ENDIAN_BIG,
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.val_format_endian = REGMAP_ENDIAN_BIG,
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.max_register = CS35L41_LASTREG,
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.reg_defaults = cs35l41_reg,
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.num_reg_defaults = ARRAY_SIZE(cs35l41_reg),
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.volatile_reg = cs35l41_volatile_reg,
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.readable_reg = cs35l41_readable_reg,
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.precious_reg = cs35l41_precious_reg,
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.cache_type = REGCACHE_RBTREE,
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};
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static const struct spi_device_id cs35l41_id_spi[] = {
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{ "cs35l40", 0 },
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{ "cs35l41", 0 },
40+
{}
41+
};
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MODULE_DEVICE_TABLE(spi, cs35l41_id_spi);
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static void cs35l41_spi_otp_setup(struct cs35l41_private *cs35l41,
46+
bool is_pre_setup, unsigned int *freq)
47+
{
48+
struct spi_device *spi;
49+
u32 orig_spi_freq;
50+
51+
spi = to_spi_device(cs35l41->dev);
52+
53+
if (!spi) {
54+
dev_err(cs35l41->dev, "%s: No SPI device\n", __func__);
55+
return;
56+
}
57+
58+
if (is_pre_setup) {
59+
orig_spi_freq = spi->max_speed_hz;
60+
if (orig_spi_freq > CS35L41_SPI_MAX_FREQ_OTP) {
61+
spi->max_speed_hz = CS35L41_SPI_MAX_FREQ_OTP;
62+
spi_setup(spi);
63+
}
64+
*freq = orig_spi_freq;
65+
} else {
66+
if (spi->max_speed_hz != *freq) {
67+
spi->max_speed_hz = *freq;
68+
spi_setup(spi);
69+
}
70+
}
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}
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static int cs35l41_spi_probe(struct spi_device *spi)
74+
{
75+
const struct regmap_config *regmap_config = &cs35l41_regmap_spi;
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struct cs35l41_platform_data *pdata =
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dev_get_platdata(&spi->dev);
78+
struct cs35l41_private *cs35l41;
79+
int ret;
80+
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cs35l41 = devm_kzalloc(&spi->dev,
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sizeof(struct cs35l41_private),
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GFP_KERNEL);
84+
if (!cs35l41)
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return -ENOMEM;
86+
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spi_set_drvdata(spi, cs35l41);
89+
cs35l41->regmap = devm_regmap_init_spi(spi, regmap_config);
90+
if (IS_ERR(cs35l41->regmap)) {
91+
ret = PTR_ERR(cs35l41->regmap);
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dev_err(&spi->dev, "Failed to allocate register map: %d\n",
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ret);
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return ret;
95+
}
96+
97+
cs35l41->dev = &spi->dev;
98+
cs35l41->irq = spi->irq;
99+
cs35l41->otp_setup = cs35l41_spi_otp_setup;
100+
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return cs35l41_probe(cs35l41, pdata);
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}
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static int cs35l41_spi_remove(struct spi_device *spi)
105+
{
106+
struct cs35l41_private *cs35l41 = spi_get_drvdata(spi);
107+
108+
return cs35l41_remove(cs35l41);
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}
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#ifdef CONFIG_OF
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static const struct of_device_id cs35l41_of_match[] = {
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{ .compatible = "cirrus,cs35l40" },
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{ .compatible = "cirrus,cs35l41" },
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{},
116+
};
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MODULE_DEVICE_TABLE(of, cs35l41_of_match);
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#endif
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id cs35l41_acpi_match[] = {
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{ "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
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{},
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};
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MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
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#endif
127+
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static struct spi_driver cs35l41_spi_driver = {
129+
.driver = {
130+
.name = "cs35l41",
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.of_match_table = of_match_ptr(cs35l41_of_match),
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.acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
133+
},
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.id_table = cs35l41_id_spi,
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.probe = cs35l41_spi_probe,
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.remove = cs35l41_spi_remove,
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};
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module_spi_driver(cs35l41_spi_driver);
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MODULE_DESCRIPTION("SPI CS35L41 driver");
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MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
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MODULE_LICENSE("GPL");

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