d110858a69
Some laptops without _DSD have the SPI speed set very low in the BIOS. Since the SPI controller uses this speed as its max speed, the SPI transactions are very slow. Firmware download writes to many registers, and if the SPI speed is too slow, it can take a long time to download. For this reason, disable firmware loading if the maximum SPI speed is too low. Without Firmware, audio playback will work, but the volume will be low to ensure safe operation of the CS35L41. Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> Cc: <stable@vger.kernel.org> # v6.7+ Link: https://lore.kernel.org/r/20231221132518.3213-3-sbinding@opensource.cirrus.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// CS35l41 HDA I2C driver
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//
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// Copyright 2021 Cirrus Logic, Inc.
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//
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// Author: Lucas Tanure <tanureal@opensource.cirrus.com>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include "cs35l41_hda.h"
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static int cs35l41_hda_i2c_probe(struct i2c_client *clt)
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{
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const char *device_name;
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/*
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* Compare against the device name so it works for SPI, normal ACPI
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* and for ACPI by serial-multi-instantiate matching cases.
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*/
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if (strstr(dev_name(&clt->dev), "CLSA0100"))
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device_name = "CLSA0100";
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else if (strstr(dev_name(&clt->dev), "CLSA0101"))
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device_name = "CLSA0101";
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else if (strstr(dev_name(&clt->dev), "CSC3551"))
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device_name = "CSC3551";
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else
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return -ENODEV;
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return cs35l41_hda_probe(&clt->dev, device_name, clt->addr, clt->irq,
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devm_regmap_init_i2c(clt, &cs35l41_regmap_i2c), I2C);
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}
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static void cs35l41_hda_i2c_remove(struct i2c_client *clt)
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{
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cs35l41_hda_remove(&clt->dev);
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}
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static const struct i2c_device_id cs35l41_hda_i2c_id[] = {
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{ "cs35l41-hda", 0 },
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{}
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};
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static const struct acpi_device_id cs35l41_acpi_hda_match[] = {
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{"CLSA0100", 0 },
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{"CLSA0101", 0 },
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{"CSC3551", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_hda_match);
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static struct i2c_driver cs35l41_i2c_driver = {
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.driver = {
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.name = "cs35l41-hda",
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.acpi_match_table = cs35l41_acpi_hda_match,
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.pm = &cs35l41_hda_pm_ops,
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},
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.id_table = cs35l41_hda_i2c_id,
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.probe = cs35l41_hda_i2c_probe,
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.remove = cs35l41_hda_i2c_remove,
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};
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module_i2c_driver(cs35l41_i2c_driver);
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MODULE_DESCRIPTION("HDA CS35L41 driver");
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MODULE_IMPORT_NS(SND_HDA_SCODEC_CS35L41);
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MODULE_AUTHOR("Lucas Tanure <tanureal@opensource.cirrus.com>");
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MODULE_LICENSE("GPL");
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