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732c678eb0
SPI hibernation is now supported with the latest hibernation/wake
sequences in the shared ASoC code.
This has a functional dependency on two commits:
commit 3df761bdbc8b ("ASoC: cs35l56: Wake transactions need to be issued
twice")
commit a47cf4dac7dc ("ASoC: cs35l56: Change hibernate sequence to use
allow auto hibernate")
To protect against this, enabling hibernation is conditional on
CS35L56_WAKE_HOLD_TIME_US being defined, which indicates that the new
hibernation sequences are available.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20231121154419.19435-1-rf@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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//
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// CS35L56 HDA audio driver SPI 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/module.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include "cs35l56_hda.h"
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static int cs35l56_hda_spi_probe(struct spi_device *spi)
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{
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struct cs35l56_hda *cs35l56;
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int ret;
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cs35l56 = devm_kzalloc(&spi->dev, sizeof(*cs35l56), GFP_KERNEL);
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if (!cs35l56)
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return -ENOMEM;
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cs35l56->base.dev = &spi->dev;
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#ifdef CS35L56_WAKE_HOLD_TIME_US
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cs35l56->base.can_hibernate = true;
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#endif
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cs35l56->base.regmap = devm_regmap_init_spi(spi, &cs35l56_regmap_spi);
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if (IS_ERR(cs35l56->base.regmap)) {
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ret = PTR_ERR(cs35l56->base.regmap);
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dev_err(cs35l56->base.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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ret = cs35l56_hda_common_probe(cs35l56, spi->chip_select);
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if (ret)
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return ret;
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ret = cs35l56_irq_request(&cs35l56->base, spi->irq);
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if (ret < 0)
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cs35l56_hda_remove(cs35l56->base.dev);
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return ret;
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}
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static void cs35l56_hda_spi_remove(struct spi_device *spi)
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{
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cs35l56_hda_remove(&spi->dev);
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}
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static const struct spi_device_id cs35l56_hda_spi_id[] = {
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{ "cs35l56-hda", 0 },
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{}
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};
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static struct spi_driver cs35l56_hda_spi_driver = {
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.driver = {
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.name = "cs35l56-hda",
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.pm = &cs35l56_hda_pm_ops,
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},
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.id_table = cs35l56_hda_spi_id,
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.probe = cs35l56_hda_spi_probe,
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.remove = cs35l56_hda_spi_remove,
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};
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module_spi_driver(cs35l56_hda_spi_driver);
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MODULE_DESCRIPTION("HDA CS35L56 SPI driver");
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MODULE_IMPORT_NS(SND_HDA_SCODEC_CS35L56);
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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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