mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
8320513e8b
Failure to terminate this match table can lead to boot failures depending on where the compiler places the match table. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
284 lines
6.5 KiB
C
284 lines
6.5 KiB
C
/*
|
|
* Driver for TPS65218 Integrated power management chipsets
|
|
*
|
|
* Copyright (C) 2014 Texas Instruments Incorporated - http://www.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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/init.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/err.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/mutex.h>
|
|
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/tps65218.h>
|
|
|
|
#define TPS65218_PASSWORD_REGS_UNLOCK 0x7D
|
|
|
|
/**
|
|
* tps65218_reg_read: Read a single tps65218 register.
|
|
*
|
|
* @tps: Device to read from.
|
|
* @reg: Register to read.
|
|
* @val: Contians the value
|
|
*/
|
|
int tps65218_reg_read(struct tps65218 *tps, unsigned int reg,
|
|
unsigned int *val)
|
|
{
|
|
return regmap_read(tps->regmap, reg, val);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65218_reg_read);
|
|
|
|
/**
|
|
* tps65218_reg_write: Write a single tps65218 register.
|
|
*
|
|
* @tps65218: Device to write to.
|
|
* @reg: Register to write to.
|
|
* @val: Value to write.
|
|
* @level: Password protected level
|
|
*/
|
|
int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
|
|
unsigned int val, unsigned int level)
|
|
{
|
|
int ret;
|
|
unsigned int xor_reg_val;
|
|
|
|
switch (level) {
|
|
case TPS65218_PROTECT_NONE:
|
|
return regmap_write(tps->regmap, reg, val);
|
|
case TPS65218_PROTECT_L1:
|
|
xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;
|
|
ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,
|
|
xor_reg_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return regmap_write(tps->regmap, reg, val);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65218_reg_write);
|
|
|
|
/**
|
|
* tps65218_update_bits: Modify bits w.r.t mask, val and level.
|
|
*
|
|
* @tps65218: Device to write to.
|
|
* @reg: Register to read-write to.
|
|
* @mask: Mask.
|
|
* @val: Value to write.
|
|
* @level: Password protected level
|
|
*/
|
|
static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,
|
|
unsigned int mask, unsigned int val, unsigned int level)
|
|
{
|
|
int ret;
|
|
unsigned int data;
|
|
|
|
ret = tps65218_reg_read(tps, reg, &data);
|
|
if (ret) {
|
|
dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
|
|
return ret;
|
|
}
|
|
|
|
data &= ~mask;
|
|
data |= val & mask;
|
|
|
|
mutex_lock(&tps->tps_lock);
|
|
ret = tps65218_reg_write(tps, reg, data, level);
|
|
if (ret)
|
|
dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
|
|
mutex_unlock(&tps->tps_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
|
|
unsigned int mask, unsigned int val, unsigned int level)
|
|
{
|
|
return tps65218_update_bits(tps, reg, mask, val, level);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65218_set_bits);
|
|
|
|
int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
|
|
unsigned int mask, unsigned int level)
|
|
{
|
|
return tps65218_update_bits(tps, reg, mask, 0, level);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65218_clear_bits);
|
|
|
|
static struct regmap_config tps65218_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
static const struct regmap_irq tps65218_irqs[] = {
|
|
/* INT1 IRQs */
|
|
[TPS65218_PRGC_IRQ] = {
|
|
.mask = TPS65218_INT1_PRGC,
|
|
},
|
|
[TPS65218_CC_AQC_IRQ] = {
|
|
.mask = TPS65218_INT1_CC_AQC,
|
|
},
|
|
[TPS65218_HOT_IRQ] = {
|
|
.mask = TPS65218_INT1_HOT,
|
|
},
|
|
[TPS65218_PB_IRQ] = {
|
|
.mask = TPS65218_INT1_PB,
|
|
},
|
|
[TPS65218_AC_IRQ] = {
|
|
.mask = TPS65218_INT1_AC,
|
|
},
|
|
[TPS65218_VPRG_IRQ] = {
|
|
.mask = TPS65218_INT1_VPRG,
|
|
},
|
|
[TPS65218_INVALID1_IRQ] = {
|
|
},
|
|
[TPS65218_INVALID2_IRQ] = {
|
|
},
|
|
/* INT2 IRQs*/
|
|
[TPS65218_LS1_I_IRQ] = {
|
|
.mask = TPS65218_INT2_LS1_I,
|
|
.reg_offset = 1,
|
|
},
|
|
[TPS65218_LS2_I_IRQ] = {
|
|
.mask = TPS65218_INT2_LS2_I,
|
|
.reg_offset = 1,
|
|
},
|
|
[TPS65218_LS3_I_IRQ] = {
|
|
.mask = TPS65218_INT2_LS3_I,
|
|
.reg_offset = 1,
|
|
},
|
|
[TPS65218_LS1_F_IRQ] = {
|
|
.mask = TPS65218_INT2_LS1_F,
|
|
.reg_offset = 1,
|
|
},
|
|
[TPS65218_LS2_F_IRQ] = {
|
|
.mask = TPS65218_INT2_LS2_F,
|
|
.reg_offset = 1,
|
|
},
|
|
[TPS65218_LS3_F_IRQ] = {
|
|
.mask = TPS65218_INT2_LS3_F,
|
|
.reg_offset = 1,
|
|
},
|
|
[TPS65218_INVALID3_IRQ] = {
|
|
},
|
|
[TPS65218_INVALID4_IRQ] = {
|
|
},
|
|
};
|
|
|
|
static struct regmap_irq_chip tps65218_irq_chip = {
|
|
.name = "tps65218",
|
|
.irqs = tps65218_irqs,
|
|
.num_irqs = ARRAY_SIZE(tps65218_irqs),
|
|
|
|
.num_regs = 2,
|
|
.mask_base = TPS65218_REG_INT_MASK1,
|
|
};
|
|
|
|
static const struct of_device_id of_tps65218_match_table[] = {
|
|
{ .compatible = "ti,tps65218", },
|
|
{}
|
|
};
|
|
|
|
static int tps65218_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *ids)
|
|
{
|
|
struct tps65218 *tps;
|
|
const struct of_device_id *match;
|
|
int ret;
|
|
|
|
match = of_match_device(of_tps65218_match_table, &client->dev);
|
|
if (!match) {
|
|
dev_err(&client->dev,
|
|
"Failed to find matching dt id\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
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, &tps65218_regmap_config);
|
|
if (IS_ERR(tps->regmap)) {
|
|
ret = PTR_ERR(tps->regmap);
|
|
dev_err(tps->dev, "Failed to allocate register map: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
mutex_init(&tps->tps_lock);
|
|
|
|
ret = regmap_add_irq_chip(tps->regmap, tps->irq,
|
|
IRQF_ONESHOT, 0, &tps65218_irq_chip,
|
|
&tps->irq_data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = of_platform_populate(client->dev.of_node, NULL, NULL,
|
|
&client->dev);
|
|
if (ret < 0)
|
|
goto err_irq;
|
|
|
|
return 0;
|
|
|
|
err_irq:
|
|
regmap_del_irq_chip(tps->irq, tps->irq_data);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int tps65218_remove(struct i2c_client *client)
|
|
{
|
|
struct tps65218 *tps = i2c_get_clientdata(client);
|
|
|
|
regmap_del_irq_chip(tps->irq, tps->irq_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id tps65218_id_table[] = {
|
|
{ "tps65218", TPS65218 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tps65218_id_table);
|
|
|
|
static struct i2c_driver tps65218_driver = {
|
|
.driver = {
|
|
.name = "tps65218",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_tps65218_match_table,
|
|
},
|
|
.probe = tps65218_probe,
|
|
.remove = tps65218_remove,
|
|
.id_table = tps65218_id_table,
|
|
};
|
|
|
|
module_i2c_driver(tps65218_driver);
|
|
|
|
MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
|
|
MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");
|
|
MODULE_LICENSE("GPL v2");
|