cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

cs35l41-spi.c (2385B)

      1// SPDX-License-Identifier: GPL-2.0
      2//
      3// cs35l41-spi.c -- CS35l41 SPI driver
      4//
      5// Copyright 2017-2021 Cirrus Logic, Inc.
      6//
      7// Author: David Rhodes	<david.rhodes@cirrus.com>
      8
      9#include <linux/acpi.h>
     10#include <linux/delay.h>
     11#include <linux/init.h>
     12#include <linux/kernel.h>
     13#include <linux/module.h>
     14#include <linux/moduleparam.h>
     15#include <linux/platform_device.h>
     16#include <linux/spi/spi.h>
     17
     18#include "cs35l41.h"
     19
     20static const struct spi_device_id cs35l41_id_spi[] = {
     21	{ "cs35l40", 0 },
     22	{ "cs35l41", 0 },
     23	{ "cs35l51", 0 },
     24	{ "cs35l53", 0 },
     25	{}
     26};
     27
     28MODULE_DEVICE_TABLE(spi, cs35l41_id_spi);
     29
     30static int cs35l41_spi_probe(struct spi_device *spi)
     31{
     32	const struct regmap_config *regmap_config = &cs35l41_regmap_spi;
     33	struct cs35l41_hw_cfg *hw_cfg = dev_get_platdata(&spi->dev);
     34	struct cs35l41_private *cs35l41;
     35	int ret;
     36
     37	cs35l41 = devm_kzalloc(&spi->dev, sizeof(struct cs35l41_private), GFP_KERNEL);
     38	if (!cs35l41)
     39		return -ENOMEM;
     40
     41	spi->max_speed_hz = CS35L41_SPI_MAX_FREQ;
     42	spi_setup(spi);
     43
     44	spi_set_drvdata(spi, cs35l41);
     45	cs35l41->regmap = devm_regmap_init_spi(spi, regmap_config);
     46	if (IS_ERR(cs35l41->regmap)) {
     47		ret = PTR_ERR(cs35l41->regmap);
     48		dev_err(&spi->dev, "Failed to allocate register map: %d\n", ret);
     49		return ret;
     50	}
     51
     52	cs35l41->dev = &spi->dev;
     53	cs35l41->irq = spi->irq;
     54
     55	return cs35l41_probe(cs35l41, hw_cfg);
     56}
     57
     58static void cs35l41_spi_remove(struct spi_device *spi)
     59{
     60	struct cs35l41_private *cs35l41 = spi_get_drvdata(spi);
     61
     62	cs35l41_remove(cs35l41);
     63}
     64
     65#ifdef CONFIG_OF
     66static const struct of_device_id cs35l41_of_match[] = {
     67	{ .compatible = "cirrus,cs35l40" },
     68	{ .compatible = "cirrus,cs35l41" },
     69	{},
     70};
     71MODULE_DEVICE_TABLE(of, cs35l41_of_match);
     72#endif
     73
     74#ifdef CONFIG_ACPI
     75static const struct acpi_device_id cs35l41_acpi_match[] = {
     76	{ "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
     77	{},
     78};
     79MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
     80#endif
     81
     82static struct spi_driver cs35l41_spi_driver = {
     83	.driver = {
     84		.name		= "cs35l41",
     85		.pm		= &cs35l41_pm_ops,
     86		.of_match_table = of_match_ptr(cs35l41_of_match),
     87		.acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
     88	},
     89	.id_table	= cs35l41_id_spi,
     90	.probe		= cs35l41_spi_probe,
     91	.remove		= cs35l41_spi_remove,
     92};
     93
     94module_spi_driver(cs35l41_spi_driver);
     95
     96MODULE_DESCRIPTION("SPI CS35L41 driver");
     97MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
     98MODULE_LICENSE("GPL");