mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
72b89b9ab5
The only way to reset the BeagleV Starlight v0.9 board[1] properly is to tell the PMIC to reset itself which will then assert the external reset lines of the SoC, USB hub and ethernet phy. This adds an mfd cell entry for the reset driver doing just that. [1] https://github.com/beagleboard/beaglev-starlight Signed-off-by: Emil Renner Berthing <kernel@esmil.dk> Signed-off-by: Lee Jones <lee.jones@linaro.org>
151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
/*
|
|
* Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
|
|
* Andrew F. Davis <afd@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
|
* kind, whether expressed or implied; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License version 2 for more details.
|
|
*
|
|
* Based on the TPS65912 driver
|
|
*/
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/mfd/tps65086.h>
|
|
|
|
static const struct mfd_cell tps65086_cells[] = {
|
|
{ .name = "tps65086-regulator", },
|
|
{ .name = "tps65086-gpio", },
|
|
{ .name = "tps65086-reset", },
|
|
};
|
|
|
|
static const struct regmap_range tps65086_yes_ranges[] = {
|
|
regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
|
|
regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
|
|
regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
|
|
regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
|
|
};
|
|
|
|
static const struct regmap_access_table tps65086_volatile_table = {
|
|
.yes_ranges = tps65086_yes_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
|
|
};
|
|
|
|
static const struct regmap_config tps65086_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
.volatile_table = &tps65086_volatile_table,
|
|
};
|
|
|
|
static const struct regmap_irq tps65086_irqs[] = {
|
|
REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
|
|
REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
|
|
REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
|
|
};
|
|
|
|
static struct regmap_irq_chip tps65086_irq_chip = {
|
|
.name = "tps65086",
|
|
.status_base = TPS65086_IRQ,
|
|
.mask_base = TPS65086_IRQ_MASK,
|
|
.ack_base = TPS65086_IRQ,
|
|
.init_ack_masked = true,
|
|
.num_regs = 1,
|
|
.irqs = tps65086_irqs,
|
|
.num_irqs = ARRAY_SIZE(tps65086_irqs),
|
|
};
|
|
|
|
static const struct of_device_id tps65086_of_match_table[] = {
|
|
{ .compatible = "ti,tps65086", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
|
|
|
|
static int tps65086_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *ids)
|
|
{
|
|
struct tps65086 *tps;
|
|
unsigned int version;
|
|
int ret;
|
|
|
|
tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
|
|
if (!tps)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, tps);
|
|
tps->dev = &client->dev;
|
|
tps->irq = client->irq;
|
|
|
|
tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
|
|
if (IS_ERR(tps->regmap)) {
|
|
dev_err(tps->dev, "Failed to initialize register map\n");
|
|
return PTR_ERR(tps->regmap);
|
|
}
|
|
|
|
ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version);
|
|
if (ret) {
|
|
dev_err(tps->dev, "Failed to read revision register\n");
|
|
return ret;
|
|
}
|
|
|
|
dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
|
|
(version & TPS65086_DEVICEID_PART_MASK),
|
|
(char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A',
|
|
(version & TPS65086_DEVICEID_REV_MASK) >> 6);
|
|
|
|
if (tps->irq > 0) {
|
|
ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
|
|
&tps65086_irq_chip, &tps->irq_data);
|
|
if (ret) {
|
|
dev_err(tps->dev, "Failed to register IRQ chip\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
|
|
ARRAY_SIZE(tps65086_cells), NULL, 0,
|
|
regmap_irq_get_domain(tps->irq_data));
|
|
if (ret && tps->irq > 0)
|
|
regmap_del_irq_chip(tps->irq, tps->irq_data);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int tps65086_remove(struct i2c_client *client)
|
|
{
|
|
struct tps65086 *tps = i2c_get_clientdata(client);
|
|
|
|
if (tps->irq > 0)
|
|
regmap_del_irq_chip(tps->irq, tps->irq_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id tps65086_id_table[] = {
|
|
{ "tps65086", 0 },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
|
|
|
|
static struct i2c_driver tps65086_driver = {
|
|
.driver = {
|
|
.name = "tps65086",
|
|
.of_match_table = tps65086_of_match_table,
|
|
},
|
|
.probe = tps65086_probe,
|
|
.remove = tps65086_remove,
|
|
.id_table = tps65086_id_table,
|
|
};
|
|
module_i2c_driver(tps65086_driver);
|
|
|
|
MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
|
|
MODULE_DESCRIPTION("TPS65086 PMIC Driver");
|
|
MODULE_LICENSE("GPL v2");
|