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linux-sg2042/drivers/mfd/tps80031.c

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/*
* 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 const 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] = devm_i2c_new_dummy_device(&client->dev,
client->adapter, tps80031_slave_address[i]);
if (IS_ERR(tps80031->clients[i])) {
dev_err(&client->dev, "can't attach client %d\n", i);
return PTR_ERR(tps80031->clients[i]);
}
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);
return ret;
}
}
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);
return ret;
}
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);
return ret;
}
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);
return ret;
}
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);
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);
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