18789be8e0
Do not allow the CS35L56 to be put into its lowest power "hibernation" mode. This only affects I2C because "hibernation" is already disabled on SPI and SoundWire. Recent firmwares need a different wake-up sequence. Until that sequence has been specified, the chip "hibernation" mode must be disabled otherwise it can intermittently fail to wake. THIS WILL NOT APPLY CLEANLY TO 6.5 AND EARLIER: We will send a separate backport patch to stable. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Link: https://lore.kernel.org/r/20230912133841.3480466-1-rf@opensource.cirrus.com Signed-off-by: Mark Brown <broonie@kernel.org>
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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//
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// CS35L56 ALSA SoC audio driver I2C binding
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//
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// Copyright (C) 2023 Cirrus Logic, Inc. and
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// Cirrus Logic International Semiconductor Ltd.
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#include <linux/acpi.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include "cs35l56.h"
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static int cs35l56_i2c_probe(struct i2c_client *client)
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{
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struct cs35l56_private *cs35l56;
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struct device *dev = &client->dev;
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const struct regmap_config *regmap_config = &cs35l56_regmap_i2c;
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int ret;
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cs35l56 = devm_kzalloc(dev, sizeof(struct cs35l56_private), GFP_KERNEL);
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if (!cs35l56)
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return -ENOMEM;
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cs35l56->base.dev = dev;
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i2c_set_clientdata(client, cs35l56);
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cs35l56->base.regmap = devm_regmap_init_i2c(client, regmap_config);
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if (IS_ERR(cs35l56->base.regmap)) {
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ret = PTR_ERR(cs35l56->base.regmap);
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return dev_err_probe(cs35l56->base.dev, ret, "Failed to allocate register map\n");
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}
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ret = cs35l56_common_probe(cs35l56);
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if (ret != 0)
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return ret;
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ret = cs35l56_init(cs35l56);
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if (ret == 0)
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ret = cs35l56_irq_request(&cs35l56->base, client->irq);
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if (ret < 0)
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cs35l56_remove(cs35l56);
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return ret;
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}
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static void cs35l56_i2c_remove(struct i2c_client *client)
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{
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struct cs35l56_private *cs35l56 = i2c_get_clientdata(client);
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cs35l56_remove(cs35l56);
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}
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static const struct i2c_device_id cs35l56_id_i2c[] = {
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{ "cs35l56", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, cs35l56_id_i2c);
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id cs35l56_asoc_acpi_match[] = {
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{ "CSC355C", 0 },
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{},
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};
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MODULE_DEVICE_TABLE(acpi, cs35l56_asoc_acpi_match);
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#endif
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static struct i2c_driver cs35l56_i2c_driver = {
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.driver = {
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.name = "cs35l56",
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.pm = &cs35l56_pm_ops_i2c_spi,
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.acpi_match_table = ACPI_PTR(cs35l56_asoc_acpi_match),
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},
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.id_table = cs35l56_id_i2c,
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.probe = cs35l56_i2c_probe,
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.remove = cs35l56_i2c_remove,
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};
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module_i2c_driver(cs35l56_i2c_driver);
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MODULE_DESCRIPTION("ASoC CS35L56 I2C driver");
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MODULE_IMPORT_NS(SND_SOC_CS35L56_CORE);
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MODULE_IMPORT_NS(SND_SOC_CS35L56_SHARED);
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MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
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MODULE_AUTHOR("Simon Trimmer <simont@opensource.cirrus.com>");
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MODULE_LICENSE("GPL");
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