cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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pinctrl-mcp23s08_i2c.c (2685B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/* MCP23S08 I2C GPIO driver */
      3
      4#include <linux/i2c.h>
      5#include <linux/mod_devicetable.h>
      6#include <linux/module.h>
      7#include <linux/regmap.h>
      8
      9#include "pinctrl-mcp23s08.h"
     10
     11static int mcp230xx_probe(struct i2c_client *client, const struct i2c_device_id *id)
     12{
     13	struct device *dev = &client->dev;
     14	unsigned int type = id->driver_data;
     15	struct mcp23s08 *mcp;
     16	int ret;
     17
     18	mcp = devm_kzalloc(dev, sizeof(*mcp), GFP_KERNEL);
     19	if (!mcp)
     20		return -ENOMEM;
     21
     22	switch (type) {
     23	case MCP_TYPE_008:
     24		mcp->regmap = devm_regmap_init_i2c(client, &mcp23x08_regmap);
     25		mcp->reg_shift = 0;
     26		mcp->chip.ngpio = 8;
     27		mcp->chip.label = "mcp23008";
     28		break;
     29
     30	case MCP_TYPE_017:
     31		mcp->regmap = devm_regmap_init_i2c(client, &mcp23x17_regmap);
     32		mcp->reg_shift = 1;
     33		mcp->chip.ngpio = 16;
     34		mcp->chip.label = "mcp23017";
     35		break;
     36
     37	case MCP_TYPE_018:
     38		mcp->regmap = devm_regmap_init_i2c(client, &mcp23x17_regmap);
     39		mcp->reg_shift = 1;
     40		mcp->chip.ngpio = 16;
     41		mcp->chip.label = "mcp23018";
     42		break;
     43
     44	default:
     45		dev_err(dev, "invalid device type (%d)\n", type);
     46		return -EINVAL;
     47	}
     48
     49	if (IS_ERR(mcp->regmap))
     50		return PTR_ERR(mcp->regmap);
     51
     52	mcp->irq = client->irq;
     53	mcp->pinctrl_desc.name = "mcp23xxx-pinctrl";
     54
     55	ret = mcp23s08_probe_one(mcp, dev, client->addr, type, -1);
     56	if (ret)
     57		return ret;
     58
     59	i2c_set_clientdata(client, mcp);
     60
     61	return 0;
     62}
     63
     64static const struct i2c_device_id mcp230xx_id[] = {
     65	{ "mcp23008", MCP_TYPE_008 },
     66	{ "mcp23017", MCP_TYPE_017 },
     67	{ "mcp23018", MCP_TYPE_018 },
     68	{ }
     69};
     70MODULE_DEVICE_TABLE(i2c, mcp230xx_id);
     71
     72static const struct of_device_id mcp23s08_i2c_of_match[] = {
     73	{
     74		.compatible = "microchip,mcp23008",
     75		.data = (void *) MCP_TYPE_008,
     76	},
     77	{
     78		.compatible = "microchip,mcp23017",
     79		.data = (void *) MCP_TYPE_017,
     80	},
     81	{
     82		.compatible = "microchip,mcp23018",
     83		.data = (void *) MCP_TYPE_018,
     84	},
     85/* NOTE: The use of the mcp prefix is deprecated and will be removed. */
     86	{
     87		.compatible = "mcp,mcp23008",
     88		.data = (void *) MCP_TYPE_008,
     89	},
     90	{
     91		.compatible = "mcp,mcp23017",
     92		.data = (void *) MCP_TYPE_017,
     93	},
     94	{ }
     95};
     96MODULE_DEVICE_TABLE(of, mcp23s08_i2c_of_match);
     97
     98static struct i2c_driver mcp230xx_driver = {
     99	.driver = {
    100		.name	= "mcp230xx",
    101		.of_match_table = mcp23s08_i2c_of_match,
    102	},
    103	.probe		= mcp230xx_probe,
    104	.id_table	= mcp230xx_id,
    105};
    106
    107static int __init mcp23s08_i2c_init(void)
    108{
    109	return i2c_add_driver(&mcp230xx_driver);
    110}
    111
    112/*
    113 * Register after I²C postcore initcall and before
    114 * subsys initcalls that may rely on these GPIOs.
    115 */
    116subsys_initcall(mcp23s08_i2c_init);
    117
    118static void mcp23s08_i2c_exit(void)
    119{
    120	i2c_del_driver(&mcp230xx_driver);
    121}
    122module_exit(mcp23s08_i2c_exit);
    123
    124MODULE_LICENSE("GPL");