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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tps65086.c (4309B)

      1/*
      2 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
      3 *	Andrew F. Davis <afd@ti.com>
      4 *
      5 * This program is free software; you can redistribute it and/or
      6 * modify it under the terms of the GNU General Public License version 2 as
      7 * published by the Free Software Foundation.
      8 *
      9 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
     10 * kind, whether expressed or implied; without even the implied warranty
     11 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     12 * GNU General Public License version 2 for more details.
     13 *
     14 * Based on the TPS65912 driver
     15 */
     16
     17#include <linux/i2c.h>
     18#include <linux/interrupt.h>
     19#include <linux/mfd/core.h>
     20#include <linux/module.h>
     21
     22#include <linux/mfd/tps65086.h>
     23
     24static const struct mfd_cell tps65086_cells[] = {
     25	{ .name = "tps65086-regulator", },
     26	{ .name = "tps65086-gpio", },
     27	{ .name = "tps65086-reset", },
     28};
     29
     30static const struct regmap_range tps65086_yes_ranges[] = {
     31	regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
     32	regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
     33	regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
     34	regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
     35};
     36
     37static const struct regmap_access_table tps65086_volatile_table = {
     38	.yes_ranges = tps65086_yes_ranges,
     39	.n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
     40};
     41
     42static const struct regmap_config tps65086_regmap_config = {
     43	.reg_bits = 8,
     44	.val_bits = 8,
     45	.cache_type = REGCACHE_RBTREE,
     46	.volatile_table = &tps65086_volatile_table,
     47};
     48
     49static const struct regmap_irq tps65086_irqs[] = {
     50	REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
     51	REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
     52	REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
     53};
     54
     55static struct regmap_irq_chip tps65086_irq_chip = {
     56	.name = "tps65086",
     57	.status_base = TPS65086_IRQ,
     58	.mask_base = TPS65086_IRQ_MASK,
     59	.ack_base = TPS65086_IRQ,
     60	.init_ack_masked = true,
     61	.num_regs = 1,
     62	.irqs = tps65086_irqs,
     63	.num_irqs = ARRAY_SIZE(tps65086_irqs),
     64};
     65
     66static const struct of_device_id tps65086_of_match_table[] = {
     67	{ .compatible = "ti,tps65086", },
     68	{ /* sentinel */ }
     69};
     70MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
     71
     72static int tps65086_probe(struct i2c_client *client,
     73			  const struct i2c_device_id *ids)
     74{
     75	struct tps65086 *tps;
     76	unsigned int version;
     77	int ret;
     78
     79	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
     80	if (!tps)
     81		return -ENOMEM;
     82
     83	i2c_set_clientdata(client, tps);
     84	tps->dev = &client->dev;
     85	tps->irq = client->irq;
     86
     87	tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
     88	if (IS_ERR(tps->regmap)) {
     89		dev_err(tps->dev, "Failed to initialize register map\n");
     90		return PTR_ERR(tps->regmap);
     91	}
     92
     93	ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version);
     94	if (ret) {
     95		dev_err(tps->dev, "Failed to read revision register\n");
     96		return ret;
     97	}
     98
     99	dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
    100		 (version & TPS65086_DEVICEID_PART_MASK),
    101		 (char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A',
    102		 (version & TPS65086_DEVICEID_REV_MASK) >> 6);
    103
    104	if (tps->irq > 0) {
    105		ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
    106					  &tps65086_irq_chip, &tps->irq_data);
    107		if (ret) {
    108			dev_err(tps->dev, "Failed to register IRQ chip\n");
    109			return ret;
    110		}
    111	}
    112
    113	ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
    114			      ARRAY_SIZE(tps65086_cells), NULL, 0,
    115			      regmap_irq_get_domain(tps->irq_data));
    116	if (ret && tps->irq > 0)
    117		regmap_del_irq_chip(tps->irq, tps->irq_data);
    118
    119	return ret;
    120}
    121
    122static int tps65086_remove(struct i2c_client *client)
    123{
    124	struct tps65086 *tps = i2c_get_clientdata(client);
    125
    126	if (tps->irq > 0)
    127		regmap_del_irq_chip(tps->irq, tps->irq_data);
    128
    129	return 0;
    130}
    131
    132static const struct i2c_device_id tps65086_id_table[] = {
    133	{ "tps65086", 0 },
    134	{ /* sentinel */ }
    135};
    136MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
    137
    138static struct i2c_driver tps65086_driver = {
    139	.driver		= {
    140		.name	= "tps65086",
    141		.of_match_table = tps65086_of_match_table,
    142	},
    143	.probe		= tps65086_probe,
    144	.remove		= tps65086_remove,
    145	.id_table       = tps65086_id_table,
    146};
    147module_i2c_driver(tps65086_driver);
    148
    149MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
    150MODULE_DESCRIPTION("TPS65086 PMIC Driver");
    151MODULE_LICENSE("GPL v2");