redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity
alistair23-linux/drivers/mfd/tps80031.c
Paul Gortmaker 6b5e1877e4 mfd: tps80031: Make it explicitly non-modular 
The Kconfig currently controlling compilation of this code is:

drivers/mfd/Kconfig:config MFD_TPS80031
drivers/mfd/Kconfig:    bool "TI TPS80031/TPS80032 Power Management chips"

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

We explicitly disallow a driver unbind, since that doesn't have a
sensible use case anyway, and it allows us to drop the ".remove"
code for non-modular drivers.

Since module_init was not in use by this code, the init ordering
remains unchanged with this commit.

We don't replace module.h with init.h since the file already has that.

Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

We also delete the MODULE_LICENSE tag etc. since all that information
is already contained at the top of the file in the comments.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2019-02-01 08:21:13 +00:00

538 lines
16 KiB
C
Raw Blame History

/*
* tps80031.c -- TI TPS80031/TPS80032 mfd core driver.
*
* MFD core driver for TI TPS80031/TPS80032 Fully Integrated
* Power Management with Power Path and Battery Charger
*
* Copyright (c) 2012, NVIDIA Corporation.
*
* Author: Laxman Dewangan <ldewangan@nvidia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
* whether express or implied; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307, USA
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps80031.h>
#include <linux/pm.h>
#include <linux/regmap.h>
#include <linux/slab.h>
static struct resource tps80031_rtc_resources[] = {
{
.start = TPS80031_INT_RTC_ALARM,
.end = TPS80031_INT_RTC_ALARM,
.flags = IORESOURCE_IRQ,
},
};
/* TPS80031 sub mfd devices */
static const struct mfd_cell tps80031_cell[] = {
{
.name = "tps80031-pmic",
},
{
.name = "tps80031-clock",
},
{
.name = "tps80031-rtc",
.num_resources = ARRAY_SIZE(tps80031_rtc_resources),
.resources = tps80031_rtc_resources,
},
{
.name = "tps80031-gpadc",
},
{
.name = "tps80031-fuel-gauge",
},
{
.name = "tps80031-charger",
},
};
static int tps80031_slave_address[TPS80031_NUM_SLAVES] = {
TPS80031_I2C_ID0_ADDR,
TPS80031_I2C_ID1_ADDR,
TPS80031_I2C_ID2_ADDR,
TPS80031_I2C_ID3_ADDR,
};
struct tps80031_pupd_data {
u8 reg;
u8 pullup_bit;
u8 pulldown_bit;
};
#define TPS80031_IRQ(_reg, _mask) \
{ \
.reg_offset = (TPS80031_INT_MSK_LINE_##_reg) - \
TPS80031_INT_MSK_LINE_A, \
.mask = BIT(_mask), \
}
static const struct regmap_irq tps80031_main_irqs[] = {
[TPS80031_INT_PWRON] = TPS80031_IRQ(A, 0),
[TPS80031_INT_RPWRON] = TPS80031_IRQ(A, 1),
[TPS80031_INT_SYS_VLOW] = TPS80031_IRQ(A, 2),
[TPS80031_INT_RTC_ALARM] = TPS80031_IRQ(A, 3),
[TPS80031_INT_RTC_PERIOD] = TPS80031_IRQ(A, 4),
[TPS80031_INT_HOT_DIE] = TPS80031_IRQ(A, 5),
[TPS80031_INT_VXX_SHORT] = TPS80031_IRQ(A, 6),
[TPS80031_INT_SPDURATION] = TPS80031_IRQ(A, 7),
[TPS80031_INT_WATCHDOG] = TPS80031_IRQ(B, 0),
[TPS80031_INT_BAT] = TPS80031_IRQ(B, 1),
[TPS80031_INT_SIM] = TPS80031_IRQ(B, 2),
[TPS80031_INT_MMC] = TPS80031_IRQ(B, 3),
[TPS80031_INT_RES] = TPS80031_IRQ(B, 4),
[TPS80031_INT_GPADC_RT] = TPS80031_IRQ(B, 5),
[TPS80031_INT_GPADC_SW2_EOC] = TPS80031_IRQ(B, 6),
[TPS80031_INT_CC_AUTOCAL] = TPS80031_IRQ(B, 7),
[TPS80031_INT_ID_WKUP] = TPS80031_IRQ(C, 0),
[TPS80031_INT_VBUSS_WKUP] = TPS80031_IRQ(C, 1),
[TPS80031_INT_ID] = TPS80031_IRQ(C, 2),
[TPS80031_INT_VBUS] = TPS80031_IRQ(C, 3),
[TPS80031_INT_CHRG_CTRL] = TPS80031_IRQ(C, 4),
[TPS80031_INT_EXT_CHRG] = TPS80031_IRQ(C, 5),
[TPS80031_INT_INT_CHRG] = TPS80031_IRQ(C, 6),
[TPS80031_INT_RES2] = TPS80031_IRQ(C, 7),
};
static struct regmap_irq_chip tps80031_irq_chip = {
.name = "tps80031",
.irqs = tps80031_main_irqs,
.num_irqs = ARRAY_SIZE(tps80031_main_irqs),
.num_regs = 3,
.status_base = TPS80031_INT_STS_A,
.mask_base = TPS80031_INT_MSK_LINE_A,
};
#define PUPD_DATA(_reg, _pulldown_bit, _pullup_bit) \
{ \
.reg = TPS80031_CFG_INPUT_PUPD##_reg, \
.pulldown_bit = _pulldown_bit, \
.pullup_bit = _pullup_bit, \
}
static const struct tps80031_pupd_data tps80031_pupds[] = {
[TPS80031_PREQ1] = PUPD_DATA(1, BIT(0), BIT(1)),
[TPS80031_PREQ2A] = PUPD_DATA(1, BIT(2), BIT(3)),
[TPS80031_PREQ2B] = PUPD_DATA(1, BIT(4), BIT(5)),
[TPS80031_PREQ2C] = PUPD_DATA(1, BIT(6), BIT(7)),
[TPS80031_PREQ3] = PUPD_DATA(2, BIT(0), BIT(1)),
[TPS80031_NRES_WARM] = PUPD_DATA(2, 0, BIT(2)),
[TPS80031_PWM_FORCE] = PUPD_DATA(2, BIT(5), 0),
[TPS80031_CHRG_EXT_CHRG_STATZ] = PUPD_DATA(2, 0, BIT(6)),
[TPS80031_SIM] = PUPD_DATA(3, BIT(0), BIT(1)),
[TPS80031_MMC] = PUPD_DATA(3, BIT(2), BIT(3)),
[TPS80031_GPADC_START] = PUPD_DATA(3, BIT(4), 0),
[TPS80031_DVSI2C_SCL] = PUPD_DATA(4, 0, BIT(0)),
[TPS80031_DVSI2C_SDA] = PUPD_DATA(4, 0, BIT(1)),
[TPS80031_CTLI2C_SCL] = PUPD_DATA(4, 0, BIT(2)),
[TPS80031_CTLI2C_SDA] = PUPD_DATA(4, 0, BIT(3)),
};
static struct tps80031 *tps80031_power_off_dev;
int tps80031_ext_power_req_config(struct device *dev,
unsigned long ext_ctrl_flag, int preq_bit,
int state_reg_add, int trans_reg_add)
{
u8 res_ass_reg = 0;
int preq_mask_bit = 0;
int ret;
if (!(ext_ctrl_flag & TPS80031_EXT_PWR_REQ))
return 0;
if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ1) {
res_ass_reg = TPS80031_PREQ1_RES_ASS_A + (preq_bit >> 3);
preq_mask_bit = 5;
} else if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ2) {
res_ass_reg = TPS80031_PREQ2_RES_ASS_A + (preq_bit >> 3);
preq_mask_bit = 6;
} else if (ext_ctrl_flag & TPS80031_PWR_REQ_INPUT_PREQ3) {
res_ass_reg = TPS80031_PREQ3_RES_ASS_A + (preq_bit >> 3);
preq_mask_bit = 7;
}
/* Configure REQ_ASS registers */
ret = tps80031_set_bits(dev, TPS80031_SLAVE_ID1, res_ass_reg,
BIT(preq_bit & 0x7));
if (ret < 0) {
dev_err(dev, "reg 0x%02x setbit failed, err = %d\n",
res_ass_reg, ret);
return ret;
}
/* Unmask the PREQ */
ret = tps80031_clr_bits(dev, TPS80031_SLAVE_ID1,
TPS80031_PHOENIX_MSK_TRANSITION, BIT(preq_mask_bit));
if (ret < 0) {
dev_err(dev, "reg 0x%02x clrbit failed, err = %d\n",
TPS80031_PHOENIX_MSK_TRANSITION, ret);
return ret;
}
/* Switch regulator control to resource now */
if (ext_ctrl_flag & (TPS80031_PWR_REQ_INPUT_PREQ2 |
TPS80031_PWR_REQ_INPUT_PREQ3)) {
ret = tps80031_update(dev, TPS80031_SLAVE_ID1, state_reg_add,
0x0, TPS80031_STATE_MASK);
if (ret < 0)
dev_err(dev, "reg 0x%02x update failed, err = %d\n",
state_reg_add, ret);
} else {
ret = tps80031_update(dev, TPS80031_SLAVE_ID1, trans_reg_add,
TPS80031_TRANS_SLEEP_OFF,
TPS80031_TRANS_SLEEP_MASK);
if (ret < 0)
dev_err(dev, "reg 0x%02x update failed, err = %d\n",
trans_reg_add, ret);
}
return ret;
}
EXPORT_SYMBOL_GPL(tps80031_ext_power_req_config);
static void tps80031_power_off(void)
{
dev_info(tps80031_power_off_dev->dev, "switching off PMU\n");
tps80031_write(tps80031_power_off_dev->dev, TPS80031_SLAVE_ID1,
TPS80031_PHOENIX_DEV_ON, TPS80031_DEVOFF);
}
static void tps80031_pupd_init(struct tps80031 *tps80031,
struct tps80031_platform_data *pdata)
{
struct tps80031_pupd_init_data *pupd_init_data = pdata->pupd_init_data;
int data_size = pdata->pupd_init_data_size;
int i;
for (i = 0; i < data_size; ++i) {
struct tps80031_pupd_init_data *pupd_init = &pupd_init_data[i];
const struct tps80031_pupd_data *pupd =
&tps80031_pupds[pupd_init->input_pin];
u8 update_value = 0;
u8 update_mask = pupd->pulldown_bit | pupd->pullup_bit;
if (pupd_init->setting == TPS80031_PUPD_PULLDOWN)
update_value = pupd->pulldown_bit;
else if (pupd_init->setting == TPS80031_PUPD_PULLUP)
update_value = pupd->pullup_bit;
tps80031_update(tps80031->dev, TPS80031_SLAVE_ID1, pupd->reg,
update_value, update_mask);
}
}
static int tps80031_init_ext_control(struct tps80031 *tps80031,
struct tps80031_platform_data *pdata)
{
struct device *dev = tps80031->dev;
int ret;
int i;
/* Clear all external control for this rail */
for (i = 0; i < 9; ++i) {
ret = tps80031_write(dev, TPS80031_SLAVE_ID1,
TPS80031_PREQ1_RES_ASS_A + i, 0);
if (ret < 0) {
dev_err(dev, "reg 0x%02x write failed, err = %d\n",
TPS80031_PREQ1_RES_ASS_A + i, ret);
return ret;
}
}
/* Mask the PREQ */
ret = tps80031_set_bits(dev, TPS80031_SLAVE_ID1,
TPS80031_PHOENIX_MSK_TRANSITION, 0x7 << 5);
if (ret < 0) {
dev_err(dev, "reg 0x%02x set_bits failed, err = %d\n",
TPS80031_PHOENIX_MSK_TRANSITION, ret);
return ret;
}
return ret;
}
static int tps80031_irq_init(struct tps80031 *tps80031, int irq, int irq_base)
{
struct device *dev = tps80031->dev;
int i, ret;
/*
* The MASK register used for updating status register when
* interrupt occurs and LINE register used to pass the status
* to actual interrupt line. As per datasheet:
* When INT_MSK_LINE [i] is set to 1, the associated interrupt
* number i is INT line masked, which means that no interrupt is
* generated on the INT line.
* When INT_MSK_LINE [i] is set to 0, the associated interrupt
* number i is line enabled: An interrupt is generated on the
* INT line.
* In any case, the INT_STS [i] status bit may or may not be updated,
* only linked to the INT_MSK_STS [i] configuration register bit.
*
* When INT_MSK_STS [i] is set to 1, the associated interrupt number
* i is status masked, which means that no interrupt is stored in
* the INT_STS[i] status bit. Note that no interrupt number i is
* generated on the INT line, even if the INT_MSK_LINE [i] register
* bit is set to 0.
* When INT_MSK_STS [i] is set to 0, the associated interrupt number i
* is status enabled: An interrupt status is updated in the INT_STS [i]
* register. The interrupt may or may not be generated on the INT line,
* depending on the INT_MSK_LINE [i] configuration register bit.
*/
for (i = 0; i < 3; i++)
tps80031_write(dev, TPS80031_SLAVE_ID2,
TPS80031_INT_MSK_STS_A + i, 0x00);
ret = regmap_add_irq_chip(tps80031->regmap[TPS80031_SLAVE_ID2], irq,
IRQF_ONESHOT, irq_base,
&tps80031_irq_chip, &tps80031->irq_data);
if (ret < 0) {
dev_err(dev, "add irq failed, err = %d\n", ret);
return ret;
}
return ret;
}
static bool rd_wr_reg_id0(struct device *dev, unsigned int reg)
{
switch (reg) {
case TPS80031_SMPS1_CFG_FORCE ... TPS80031_SMPS2_CFG_VOLTAGE:
return true;
default:
return false;
}
}
static bool rd_wr_reg_id1(struct device *dev, unsigned int reg)
{
switch (reg) {
case TPS80031_SECONDS_REG ... TPS80031_RTC_RESET_STATUS_REG:
case TPS80031_VALIDITY0 ... TPS80031_VALIDITY7:
case TPS80031_PHOENIX_START_CONDITION ... TPS80031_KEY_PRESS_DUR_CFG:
case TPS80031_SMPS4_CFG_TRANS ... TPS80031_SMPS3_CFG_VOLTAGE:
case TPS80031_BROADCAST_ADDR_ALL ... TPS80031_BROADCAST_ADDR_CLK_RST:
case TPS80031_VANA_CFG_TRANS ... TPS80031_LDO7_CFG_VOLTAGE:
case TPS80031_REGEN1_CFG_TRANS ... TPS80031_TMP_CFG_STATE:
case TPS80031_PREQ1_RES_ASS_A ... TPS80031_PREQ3_RES_ASS_C:
case TPS80031_SMPS_OFFSET ... TPS80031_BATDEBOUNCING:
case TPS80031_CFG_INPUT_PUPD1 ... TPS80031_CFG_SMPS_PD:
case TPS80031_BACKUP_REG:
return true;
default:
return false;
}
}
static bool is_volatile_reg_id1(struct device *dev, unsigned int reg)
{
switch (reg) {
case TPS80031_SMPS4_CFG_TRANS ... TPS80031_SMPS3_CFG_VOLTAGE:
case TPS80031_VANA_CFG_TRANS ... TPS80031_LDO7_CFG_VOLTAGE:
case TPS80031_REGEN1_CFG_TRANS ... TPS80031_TMP_CFG_STATE:
case TPS80031_PREQ1_RES_ASS_A ... TPS80031_PREQ3_RES_ASS_C:
case TPS80031_SMPS_OFFSET ... TPS80031_BATDEBOUNCING:
case TPS80031_CFG_INPUT_PUPD1 ... TPS80031_CFG_SMPS_PD:
return true;
default:
return false;
}
}
static bool rd_wr_reg_id2(struct device *dev, unsigned int reg)
{
switch (reg) {
case TPS80031_USB_VENDOR_ID_LSB ... TPS80031_USB_OTG_REVISION:
case TPS80031_GPADC_CTRL ... TPS80031_CTRL_P1:
case TPS80031_RTCH0_LSB ... TPS80031_GPCH0_MSB:
case TPS80031_TOGGLE1 ... TPS80031_VIBMODE:
case TPS80031_PWM1ON ... TPS80031_PWM2OFF:
case TPS80031_FG_REG_00 ... TPS80031_FG_REG_11:
case TPS80031_INT_STS_A ... TPS80031_INT_MSK_STS_C:
case TPS80031_CONTROLLER_CTRL2 ... TPS80031_LED_PWM_CTRL2:
return true;
default:
return false;
}
}
static bool rd_wr_reg_id3(struct device *dev, unsigned int reg)
{
switch (reg) {
case TPS80031_GPADC_TRIM0 ... TPS80031_GPADC_TRIM18:
return true;
default:
return false;
}
}
static const struct regmap_config tps80031_regmap_configs[] = {
{
.reg_bits = 8,
.val_bits = 8,
.writeable_reg = rd_wr_reg_id0,
.readable_reg = rd_wr_reg_id0,
.max_register = TPS80031_MAX_REGISTER,
},
{
.reg_bits = 8,
.val_bits = 8,
.writeable_reg = rd_wr_reg_id1,
.readable_reg = rd_wr_reg_id1,
.volatile_reg = is_volatile_reg_id1,
.max_register = TPS80031_MAX_REGISTER,
},
{
.reg_bits = 8,
.val_bits = 8,
.writeable_reg = rd_wr_reg_id2,
.readable_reg = rd_wr_reg_id2,
.max_register = TPS80031_MAX_REGISTER,
},
{
.reg_bits = 8,
.val_bits = 8,
.writeable_reg = rd_wr_reg_id3,
.readable_reg = rd_wr_reg_id3,
.max_register = TPS80031_MAX_REGISTER,
},
};
static int tps80031_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tps80031_platform_data *pdata = dev_get_platdata(&client->dev);
struct tps80031 *tps80031;
int ret;
uint8_t es_version;
uint8_t ep_ver;
int i;
if (!pdata) {
dev_err(&client->dev, "tps80031 requires platform data\n");
return -EINVAL;
}
tps80031 = devm_kzalloc(&client->dev, sizeof(*tps80031), GFP_KERNEL);
if (!tps80031)
return -ENOMEM;
for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
if (tps80031_slave_address[i] == client->addr)
tps80031->clients[i] = client;
else
tps80031->clients[i] = i2c_new_dummy(client->adapter,
tps80031_slave_address[i]);
if (!tps80031->clients[i]) {
dev_err(&client->dev, "can't attach client %d\n", i);
ret = -ENOMEM;
goto fail_client_reg;
}
i2c_set_clientdata(tps80031->clients[i], tps80031);
tps80031->regmap[i] = devm_regmap_init_i2c(tps80031->clients[i],
&tps80031_regmap_configs[i]);
if (IS_ERR(tps80031->regmap[i])) {
ret = PTR_ERR(tps80031->regmap[i]);
dev_err(&client->dev,
"regmap %d init failed, err %d\n", i, ret);
goto fail_client_reg;
}
}
ret = tps80031_read(&client->dev, TPS80031_SLAVE_ID3,
TPS80031_JTAGVERNUM, &es_version);
if (ret < 0) {
dev_err(&client->dev,
"Silicon version number read failed: %d\n", ret);
goto fail_client_reg;
}
ret = tps80031_read(&client->dev, TPS80031_SLAVE_ID3,
TPS80031_EPROM_REV, &ep_ver);
if (ret < 0) {
dev_err(&client->dev,
"Silicon eeprom version read failed: %d\n", ret);
goto fail_client_reg;
}
dev_info(&client->dev, "ES version 0x%02x and EPROM version 0x%02x\n",
es_version, ep_ver);
tps80031->es_version = es_version;
tps80031->dev = &client->dev;
i2c_set_clientdata(client, tps80031);
tps80031->chip_info = id->driver_data;
ret = tps80031_irq_init(tps80031, client->irq, pdata->irq_base);
if (ret) {
dev_err(&client->dev, "IRQ init failed: %d\n", ret);
goto fail_client_reg;
}
tps80031_pupd_init(tps80031, pdata);
tps80031_init_ext_control(tps80031, pdata);
ret = mfd_add_devices(tps80031->dev, -1,
tps80031_cell, ARRAY_SIZE(tps80031_cell),
NULL, 0,
regmap_irq_get_domain(tps80031->irq_data));
if (ret < 0) {
dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
goto fail_mfd_add;
}
if (pdata->use_power_off && !pm_power_off) {
tps80031_power_off_dev = tps80031;
pm_power_off = tps80031_power_off;
}
return 0;
fail_mfd_add:
regmap_del_irq_chip(client->irq, tps80031->irq_data);
fail_client_reg:
for (i = 0; i < TPS80031_NUM_SLAVES; i++) {
if (tps80031->clients[i] && (tps80031->clients[i] != client))
i2c_unregister_device(tps80031->clients[i]);
}
return ret;
}
static const struct i2c_device_id tps80031_id_table[] = {
{ "tps80031", TPS80031 },
{ "tps80032", TPS80032 },
{ }
};
static struct i2c_driver tps80031_driver = {
.driver = {
.name = "tps80031",
.suppress_bind_attrs = true,
},
.probe = tps80031_probe,
.id_table = tps80031_id_table,
};
static int __init tps80031_init(void)
{
return i2c_add_driver(&tps80031_driver);
}
subsys_initcall(tps80031_init);
View git blame Copy permalink