mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Alexander A. Klimov](/assets/img/avatar_default.png)
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
367 lines
8.5 KiB
C
367 lines
8.5 KiB
C
/*
|
|
* Driver for TPS65218 Integrated power management chipsets
|
|
*
|
|
* Copyright (C) 2014 Texas Instruments Incorporated - https://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
|
|
|
|
static const struct mfd_cell tps65218_cells[] = {
|
|
{
|
|
.name = "tps65218-pwrbutton",
|
|
.of_compatible = "ti,tps65218-pwrbutton",
|
|
},
|
|
{
|
|
.name = "tps65218-gpio",
|
|
.of_compatible = "ti,tps65218-gpio",
|
|
},
|
|
{ .name = "tps65218-regulator", },
|
|
};
|
|
|
|
/**
|
|
* tps65218_reg_write: Write a single tps65218 register.
|
|
*
|
|
* @tps: 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.
|
|
*
|
|
* @tps: 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 = regmap_read(tps->regmap, 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 const 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", },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, of_tps65218_match_table);
|
|
|
|
static int tps65218_voltage_set_strict(struct tps65218 *tps)
|
|
{
|
|
u32 strict;
|
|
|
|
if (of_property_read_u32(tps->dev->of_node,
|
|
"ti,strict-supply-voltage-supervision",
|
|
&strict))
|
|
return 0;
|
|
|
|
if (strict != 0 && strict != 1) {
|
|
dev_err(tps->dev,
|
|
"Invalid ti,strict-supply-voltage-supervision value\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
|
|
TPS65218_CONFIG1_STRICT,
|
|
strict ? TPS65218_CONFIG1_STRICT : 0,
|
|
TPS65218_PROTECT_L1);
|
|
return 0;
|
|
}
|
|
|
|
static int tps65218_voltage_set_uv_hyst(struct tps65218 *tps)
|
|
{
|
|
u32 hyst;
|
|
|
|
if (of_property_read_u32(tps->dev->of_node,
|
|
"ti,under-voltage-hyst-microvolt", &hyst))
|
|
return 0;
|
|
|
|
if (hyst != 400000 && hyst != 200000) {
|
|
dev_err(tps->dev,
|
|
"Invalid ti,under-voltage-hyst-microvolt value\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
tps65218_update_bits(tps, TPS65218_REG_CONFIG2,
|
|
TPS65218_CONFIG2_UVLOHYS,
|
|
hyst == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0,
|
|
TPS65218_PROTECT_L1);
|
|
return 0;
|
|
}
|
|
|
|
static int tps65218_voltage_set_uvlo(struct tps65218 *tps)
|
|
{
|
|
u32 uvlo;
|
|
int uvloval;
|
|
|
|
if (of_property_read_u32(tps->dev->of_node,
|
|
"ti,under-voltage-limit-microvolt", &uvlo))
|
|
return 0;
|
|
|
|
switch (uvlo) {
|
|
case 2750000:
|
|
uvloval = TPS65218_CONFIG1_UVLO_2750000;
|
|
break;
|
|
case 2950000:
|
|
uvloval = TPS65218_CONFIG1_UVLO_2950000;
|
|
break;
|
|
case 3250000:
|
|
uvloval = TPS65218_CONFIG1_UVLO_3250000;
|
|
break;
|
|
case 3350000:
|
|
uvloval = TPS65218_CONFIG1_UVLO_3350000;
|
|
break;
|
|
default:
|
|
dev_err(tps->dev,
|
|
"Invalid ti,under-voltage-limit-microvolt value\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
|
|
TPS65218_CONFIG1_UVLO_MASK, uvloval,
|
|
TPS65218_PROTECT_L1);
|
|
return 0;
|
|
}
|
|
|
|
static int tps65218_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *ids)
|
|
{
|
|
struct tps65218 *tps;
|
|
int ret;
|
|
unsigned int chipid;
|
|
|
|
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 = devm_regmap_add_irq_chip(&client->dev, tps->regmap, tps->irq,
|
|
IRQF_ONESHOT, 0, &tps65218_irq_chip,
|
|
&tps->irq_data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid);
|
|
if (ret) {
|
|
dev_err(tps->dev, "Failed to read chipid: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
tps->rev = chipid & TPS65218_CHIPID_REV_MASK;
|
|
|
|
ret = tps65218_voltage_set_strict(tps);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = tps65218_voltage_set_uvlo(tps);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = tps65218_voltage_set_uv_hyst(tps);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,
|
|
ARRAY_SIZE(tps65218_cells), NULL, 0,
|
|
regmap_irq_get_domain(tps->irq_data));
|
|
|
|
return ret;
|
|
}
|
|
|
|
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",
|
|
.of_match_table = of_tps65218_match_table,
|
|
},
|
|
.probe = tps65218_probe,
|
|
.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");
|