137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* cs35l43-spi.c -- CS35l41 SPI driver
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*
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* Copyright 2017 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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/version.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/gpio.h>
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#include <linux/spi/spi.h>
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#include <linux/regulator/consumer.h>
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#include "wm_adsp.h"
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#include "cs35l43.h"
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#include <sound/cs35l43.h>
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static struct regmap_config cs35l43_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 = 4,
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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 = CS35L43_DSP1_PMEM_5114,
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.reg_defaults = cs35l43_reg,
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.num_reg_defaults = CS35L43_NUM_DEFAULTS,
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.volatile_reg = cs35l43_volatile_reg,
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.readable_reg = cs35l43_readable_reg,
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.precious_reg = cs35l43_precious_reg,
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.cache_type = REGCACHE_RBTREE,
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};
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static const struct spi_device_id cs35l43_id_spi[] = {
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{"cs35l43", 0},
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{}
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};
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MODULE_DEVICE_TABLE(spi, cs35l43_id_spi);
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static void cs35l43_limit_spi_clock(struct cs35l43_private *cs35l43, bool state)
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{
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struct spi_device *spi;
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spi = to_spi_device(cs35l43->dev);
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if (!spi) {
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dev_err(cs35l43->dev, "%s: No SPI device\n", __func__);
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return;
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}
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if (state)
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spi->max_speed_hz = CS35L43_SPI_MAX_FREQ_NO_PLL;
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else
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spi->max_speed_hz = cs35l43->max_spi_freq;
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dev_dbg(&spi->dev, "Set SPI freq: %d\n", spi->max_speed_hz);
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spi_setup(spi);
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}
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static int cs35l43_spi_probe(struct spi_device *spi)
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{
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const struct regmap_config *regmap_config = &cs35l43_regmap_spi;
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struct cs35l43_platform_data *pdata =
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dev_get_platdata(&spi->dev);
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struct cs35l43_private *cs35l43;
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int ret;
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cs35l43 = devm_kzalloc(&spi->dev,
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sizeof(struct cs35l43_private),
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GFP_KERNEL);
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if (cs35l43 == NULL)
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return -ENOMEM;
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spi_set_drvdata(spi, cs35l43);
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cs35l43->regmap = devm_regmap_init_spi(spi, regmap_config);
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if (IS_ERR(cs35l43->regmap)) {
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ret = PTR_ERR(cs35l43->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;
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}
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cs35l43->dev = &spi->dev;
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cs35l43->irq = spi->irq;
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cs35l43->max_spi_freq = spi->max_speed_hz;
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cs35l43->limit_spi_clock = cs35l43_limit_spi_clock;
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cs35l43_limit_spi_clock(cs35l43, true);
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return cs35l43_probe(cs35l43, pdata);
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}
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static int cs35l43_spi_remove(struct spi_device *spi)
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{
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struct cs35l43_private *cs35l43 = spi_get_drvdata(spi);
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return cs35l43_remove(cs35l43);
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}
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static const struct of_device_id cs35l43_of_match[] = {
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{.compatible = "cirrus,cs35l43"},
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{},
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};
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MODULE_DEVICE_TABLE(of, cs35l43_of_match);
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static struct spi_driver cs35l43_spi_driver = {
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.driver = {
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.name = "cs35l43",
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.of_match_table = cs35l43_of_match,
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.pm = &cs35l43_pm_ops,
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},
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.id_table = cs35l43_id_spi,
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.probe = cs35l43_spi_probe,
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.remove = cs35l43_spi_remove,
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};
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module_spi_driver(cs35l43_spi_driver);
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MODULE_DESCRIPTION("SPI CS35L43 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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