You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
295 lines
6.9 KiB
295 lines
6.9 KiB
/* |
|
* 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 const struct regmap_range tps65218_yes_ranges[] = { |
|
regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2), |
|
regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS), |
|
}; |
|
|
|
static const struct regmap_access_table tps65218_volatile_table = { |
|
.yes_ranges = tps65218_yes_ranges, |
|
.n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges), |
|
}; |
|
|
|
static struct regmap_config tps65218_regmap_config = { |
|
.reg_bits = 8, |
|
.val_bits = 8, |
|
.cache_type = REGCACHE_RBTREE, |
|
.volatile_table = &tps65218_volatile_table, |
|
}; |
|
|
|
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, |
|
.status_base = TPS65218_REG_INT1, |
|
}; |
|
|
|
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");
|
|
|