453 lines
12 KiB
C
453 lines
12 KiB
C
/*
|
|
* Core driver for ams AS3722 PMICs
|
|
*
|
|
* Copyright (C) 2013 AMS AG
|
|
* Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
|
|
*
|
|
* Author: Florian Lobmaier <florian.lobmaier@ams.com>
|
|
* 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; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; 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/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/as3722.h>
|
|
#include <linux/of.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
|
|
#define AS3722_DEVICE_ID 0x0C
|
|
|
|
static const struct resource as3722_rtc_resource[] = {
|
|
{
|
|
.name = "as3722-rtc-alarm",
|
|
.start = AS3722_IRQ_RTC_ALARM,
|
|
.end = AS3722_IRQ_RTC_ALARM,
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
static const struct resource as3722_adc_resource[] = {
|
|
{
|
|
.name = "as3722-adc",
|
|
.start = AS3722_IRQ_ADC,
|
|
.end = AS3722_IRQ_ADC,
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
static const struct mfd_cell as3722_devs[] = {
|
|
{
|
|
.name = "as3722-pinctrl",
|
|
},
|
|
{
|
|
.name = "as3722-regulator",
|
|
},
|
|
{
|
|
.name = "as3722-rtc",
|
|
.num_resources = ARRAY_SIZE(as3722_rtc_resource),
|
|
.resources = as3722_rtc_resource,
|
|
},
|
|
{
|
|
.name = "as3722-adc",
|
|
.num_resources = ARRAY_SIZE(as3722_adc_resource),
|
|
.resources = as3722_adc_resource,
|
|
},
|
|
{
|
|
.name = "as3722-power-off",
|
|
},
|
|
{
|
|
.name = "as3722-wdt",
|
|
},
|
|
};
|
|
|
|
static const struct regmap_irq as3722_irqs[] = {
|
|
/* INT1 IRQs */
|
|
[AS3722_IRQ_LID] = {
|
|
.mask = AS3722_INTERRUPT_MASK1_LID,
|
|
},
|
|
[AS3722_IRQ_ACOK] = {
|
|
.mask = AS3722_INTERRUPT_MASK1_ACOK,
|
|
},
|
|
[AS3722_IRQ_ENABLE1] = {
|
|
.mask = AS3722_INTERRUPT_MASK1_ENABLE1,
|
|
},
|
|
[AS3722_IRQ_OCCUR_ALARM_SD0] = {
|
|
.mask = AS3722_INTERRUPT_MASK1_OCURR_ALARM_SD0,
|
|
},
|
|
[AS3722_IRQ_ONKEY_LONG_PRESS] = {
|
|
.mask = AS3722_INTERRUPT_MASK1_ONKEY_LONG,
|
|
},
|
|
[AS3722_IRQ_ONKEY] = {
|
|
.mask = AS3722_INTERRUPT_MASK1_ONKEY,
|
|
},
|
|
[AS3722_IRQ_OVTMP] = {
|
|
.mask = AS3722_INTERRUPT_MASK1_OVTMP,
|
|
},
|
|
[AS3722_IRQ_LOWBAT] = {
|
|
.mask = AS3722_INTERRUPT_MASK1_LOWBAT,
|
|
},
|
|
|
|
/* INT2 IRQs */
|
|
[AS3722_IRQ_SD0_LV] = {
|
|
.mask = AS3722_INTERRUPT_MASK2_SD0_LV,
|
|
.reg_offset = 1,
|
|
},
|
|
[AS3722_IRQ_SD1_LV] = {
|
|
.mask = AS3722_INTERRUPT_MASK2_SD1_LV,
|
|
.reg_offset = 1,
|
|
},
|
|
[AS3722_IRQ_SD2_LV] = {
|
|
.mask = AS3722_INTERRUPT_MASK2_SD2345_LV,
|
|
.reg_offset = 1,
|
|
},
|
|
[AS3722_IRQ_PWM1_OV_PROT] = {
|
|
.mask = AS3722_INTERRUPT_MASK2_PWM1_OV_PROT,
|
|
.reg_offset = 1,
|
|
},
|
|
[AS3722_IRQ_PWM2_OV_PROT] = {
|
|
.mask = AS3722_INTERRUPT_MASK2_PWM2_OV_PROT,
|
|
.reg_offset = 1,
|
|
},
|
|
[AS3722_IRQ_ENABLE2] = {
|
|
.mask = AS3722_INTERRUPT_MASK2_ENABLE2,
|
|
.reg_offset = 1,
|
|
},
|
|
[AS3722_IRQ_SD6_LV] = {
|
|
.mask = AS3722_INTERRUPT_MASK2_SD6_LV,
|
|
.reg_offset = 1,
|
|
},
|
|
[AS3722_IRQ_RTC_REP] = {
|
|
.mask = AS3722_INTERRUPT_MASK2_RTC_REP,
|
|
.reg_offset = 1,
|
|
},
|
|
|
|
/* INT3 IRQs */
|
|
[AS3722_IRQ_RTC_ALARM] = {
|
|
.mask = AS3722_INTERRUPT_MASK3_RTC_ALARM,
|
|
.reg_offset = 2,
|
|
},
|
|
[AS3722_IRQ_GPIO1] = {
|
|
.mask = AS3722_INTERRUPT_MASK3_GPIO1,
|
|
.reg_offset = 2,
|
|
},
|
|
[AS3722_IRQ_GPIO2] = {
|
|
.mask = AS3722_INTERRUPT_MASK3_GPIO2,
|
|
.reg_offset = 2,
|
|
},
|
|
[AS3722_IRQ_GPIO3] = {
|
|
.mask = AS3722_INTERRUPT_MASK3_GPIO3,
|
|
.reg_offset = 2,
|
|
},
|
|
[AS3722_IRQ_GPIO4] = {
|
|
.mask = AS3722_INTERRUPT_MASK3_GPIO4,
|
|
.reg_offset = 2,
|
|
},
|
|
[AS3722_IRQ_GPIO5] = {
|
|
.mask = AS3722_INTERRUPT_MASK3_GPIO5,
|
|
.reg_offset = 2,
|
|
},
|
|
[AS3722_IRQ_WATCHDOG] = {
|
|
.mask = AS3722_INTERRUPT_MASK3_WATCHDOG,
|
|
.reg_offset = 2,
|
|
},
|
|
[AS3722_IRQ_ENABLE3] = {
|
|
.mask = AS3722_INTERRUPT_MASK3_ENABLE3,
|
|
.reg_offset = 2,
|
|
},
|
|
|
|
/* INT4 IRQs */
|
|
[AS3722_IRQ_TEMP_SD0_SHUTDOWN] = {
|
|
.mask = AS3722_INTERRUPT_MASK4_TEMP_SD0_SHUTDOWN,
|
|
.reg_offset = 3,
|
|
},
|
|
[AS3722_IRQ_TEMP_SD1_SHUTDOWN] = {
|
|
.mask = AS3722_INTERRUPT_MASK4_TEMP_SD1_SHUTDOWN,
|
|
.reg_offset = 3,
|
|
},
|
|
[AS3722_IRQ_TEMP_SD2_SHUTDOWN] = {
|
|
.mask = AS3722_INTERRUPT_MASK4_TEMP_SD6_SHUTDOWN,
|
|
.reg_offset = 3,
|
|
},
|
|
[AS3722_IRQ_TEMP_SD0_ALARM] = {
|
|
.mask = AS3722_INTERRUPT_MASK4_TEMP_SD0_ALARM,
|
|
.reg_offset = 3,
|
|
},
|
|
[AS3722_IRQ_TEMP_SD1_ALARM] = {
|
|
.mask = AS3722_INTERRUPT_MASK4_TEMP_SD1_ALARM,
|
|
.reg_offset = 3,
|
|
},
|
|
[AS3722_IRQ_TEMP_SD6_ALARM] = {
|
|
.mask = AS3722_INTERRUPT_MASK4_TEMP_SD6_ALARM,
|
|
.reg_offset = 3,
|
|
},
|
|
[AS3722_IRQ_OCCUR_ALARM_SD6] = {
|
|
.mask = AS3722_INTERRUPT_MASK4_OCCUR_ALARM_SD6,
|
|
.reg_offset = 3,
|
|
},
|
|
[AS3722_IRQ_ADC] = {
|
|
.mask = AS3722_INTERRUPT_MASK4_ADC,
|
|
.reg_offset = 3,
|
|
},
|
|
};
|
|
|
|
static const struct regmap_irq_chip as3722_irq_chip = {
|
|
.name = "as3722",
|
|
.irqs = as3722_irqs,
|
|
.num_irqs = ARRAY_SIZE(as3722_irqs),
|
|
.num_regs = 4,
|
|
.status_base = AS3722_INTERRUPT_STATUS1_REG,
|
|
.mask_base = AS3722_INTERRUPT_MASK1_REG,
|
|
};
|
|
|
|
static int as3722_check_device_id(struct as3722 *as3722)
|
|
{
|
|
u32 val;
|
|
int ret;
|
|
|
|
/* Check that this is actually a AS3722 */
|
|
ret = as3722_read(as3722, AS3722_ASIC_ID1_REG, &val);
|
|
if (ret < 0) {
|
|
dev_err(as3722->dev, "ASIC_ID1 read failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (val != AS3722_DEVICE_ID) {
|
|
dev_err(as3722->dev, "Device is not AS3722, ID is 0x%x\n", val);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = as3722_read(as3722, AS3722_ASIC_ID2_REG, &val);
|
|
if (ret < 0) {
|
|
dev_err(as3722->dev, "ASIC_ID2 read failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
dev_info(as3722->dev, "AS3722 with revision 0x%x found\n", val);
|
|
return 0;
|
|
}
|
|
|
|
static int as3722_configure_pullups(struct as3722 *as3722)
|
|
{
|
|
int ret;
|
|
u32 val = 0;
|
|
|
|
if (as3722->en_intern_int_pullup)
|
|
val |= AS3722_INT_PULL_UP;
|
|
if (as3722->en_intern_i2c_pullup)
|
|
val |= AS3722_I2C_PULL_UP;
|
|
|
|
ret = as3722_update_bits(as3722, AS3722_IOVOLTAGE_REG,
|
|
AS3722_INT_PULL_UP | AS3722_I2C_PULL_UP, val);
|
|
if (ret < 0)
|
|
dev_err(as3722->dev, "IOVOLTAGE_REG update failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
static const struct regmap_range as3722_readable_ranges[] = {
|
|
regmap_reg_range(AS3722_SD0_VOLTAGE_REG, AS3722_SD6_VOLTAGE_REG),
|
|
regmap_reg_range(AS3722_GPIO0_CONTROL_REG, AS3722_LDO7_VOLTAGE_REG),
|
|
regmap_reg_range(AS3722_LDO9_VOLTAGE_REG, AS3722_REG_SEQU_MOD3_REG),
|
|
regmap_reg_range(AS3722_SD_PHSW_CTRL_REG, AS3722_PWM_CONTROL_H_REG),
|
|
regmap_reg_range(AS3722_WATCHDOG_TIMER_REG, AS3722_WATCHDOG_TIMER_REG),
|
|
regmap_reg_range(AS3722_WATCHDOG_SOFTWARE_SIGNAL_REG,
|
|
AS3722_BATTERY_VOLTAGE_MONITOR2_REG),
|
|
regmap_reg_range(AS3722_SD_CONTROL_REG, AS3722_PWM_VCONTROL4_REG),
|
|
regmap_reg_range(AS3722_BB_CHARGER_REG, AS3722_SRAM_REG),
|
|
regmap_reg_range(AS3722_RTC_ACCESS_REG, AS3722_RTC_ACCESS_REG),
|
|
regmap_reg_range(AS3722_RTC_STATUS_REG, AS3722_TEMP_STATUS_REG),
|
|
regmap_reg_range(AS3722_ADC0_CONTROL_REG, AS3722_ADC_CONFIGURATION_REG),
|
|
regmap_reg_range(AS3722_ASIC_ID1_REG, AS3722_ASIC_ID2_REG),
|
|
regmap_reg_range(AS3722_LOCK_REG, AS3722_LOCK_REG),
|
|
regmap_reg_range(AS3722_FUSE7_REG, AS3722_FUSE7_REG),
|
|
};
|
|
|
|
static const struct regmap_access_table as3722_readable_table = {
|
|
.yes_ranges = as3722_readable_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(as3722_readable_ranges),
|
|
};
|
|
|
|
static const struct regmap_range as3722_writable_ranges[] = {
|
|
regmap_reg_range(AS3722_SD0_VOLTAGE_REG, AS3722_SD6_VOLTAGE_REG),
|
|
regmap_reg_range(AS3722_GPIO0_CONTROL_REG, AS3722_LDO7_VOLTAGE_REG),
|
|
regmap_reg_range(AS3722_LDO9_VOLTAGE_REG, AS3722_GPIO_SIGNAL_OUT_REG),
|
|
regmap_reg_range(AS3722_REG_SEQU_MOD1_REG, AS3722_REG_SEQU_MOD3_REG),
|
|
regmap_reg_range(AS3722_SD_PHSW_CTRL_REG, AS3722_PWM_CONTROL_H_REG),
|
|
regmap_reg_range(AS3722_WATCHDOG_TIMER_REG, AS3722_WATCHDOG_TIMER_REG),
|
|
regmap_reg_range(AS3722_WATCHDOG_SOFTWARE_SIGNAL_REG,
|
|
AS3722_BATTERY_VOLTAGE_MONITOR2_REG),
|
|
regmap_reg_range(AS3722_SD_CONTROL_REG, AS3722_PWM_VCONTROL4_REG),
|
|
regmap_reg_range(AS3722_BB_CHARGER_REG, AS3722_SRAM_REG),
|
|
regmap_reg_range(AS3722_INTERRUPT_MASK1_REG, AS3722_TEMP_STATUS_REG),
|
|
regmap_reg_range(AS3722_ADC0_CONTROL_REG, AS3722_ADC1_CONTROL_REG),
|
|
regmap_reg_range(AS3722_ADC1_THRESHOLD_HI_MSB_REG,
|
|
AS3722_ADC_CONFIGURATION_REG),
|
|
regmap_reg_range(AS3722_LOCK_REG, AS3722_LOCK_REG),
|
|
};
|
|
|
|
static const struct regmap_access_table as3722_writable_table = {
|
|
.yes_ranges = as3722_writable_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(as3722_writable_ranges),
|
|
};
|
|
|
|
static const struct regmap_range as3722_cacheable_ranges[] = {
|
|
regmap_reg_range(AS3722_SD0_VOLTAGE_REG, AS3722_LDO11_VOLTAGE_REG),
|
|
regmap_reg_range(AS3722_SD_CONTROL_REG, AS3722_LDOCONTROL1_REG),
|
|
};
|
|
|
|
static const struct regmap_access_table as3722_volatile_table = {
|
|
.no_ranges = as3722_cacheable_ranges,
|
|
.n_no_ranges = ARRAY_SIZE(as3722_cacheable_ranges),
|
|
};
|
|
|
|
static const struct regmap_config as3722_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = AS3722_MAX_REGISTER,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
.rd_table = &as3722_readable_table,
|
|
.wr_table = &as3722_writable_table,
|
|
.volatile_table = &as3722_volatile_table,
|
|
};
|
|
|
|
static int as3722_i2c_of_probe(struct i2c_client *i2c,
|
|
struct as3722 *as3722)
|
|
{
|
|
struct device_node *np = i2c->dev.of_node;
|
|
struct irq_data *irq_data;
|
|
|
|
if (!np) {
|
|
dev_err(&i2c->dev, "Device Tree not found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
irq_data = irq_get_irq_data(i2c->irq);
|
|
if (!irq_data) {
|
|
dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq);
|
|
return -EINVAL;
|
|
}
|
|
|
|
as3722->en_intern_int_pullup = of_property_read_bool(np,
|
|
"ams,enable-internal-int-pullup");
|
|
as3722->en_intern_i2c_pullup = of_property_read_bool(np,
|
|
"ams,enable-internal-i2c-pullup");
|
|
as3722->irq_flags = irqd_get_trigger_type(irq_data);
|
|
dev_dbg(&i2c->dev, "IRQ flags are 0x%08lx\n", as3722->irq_flags);
|
|
return 0;
|
|
}
|
|
|
|
static int as3722_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct as3722 *as3722;
|
|
unsigned long irq_flags;
|
|
int ret;
|
|
|
|
as3722 = devm_kzalloc(&i2c->dev, sizeof(struct as3722), GFP_KERNEL);
|
|
if (!as3722)
|
|
return -ENOMEM;
|
|
|
|
as3722->dev = &i2c->dev;
|
|
as3722->chip_irq = i2c->irq;
|
|
i2c_set_clientdata(i2c, as3722);
|
|
|
|
ret = as3722_i2c_of_probe(i2c, as3722);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
as3722->regmap = devm_regmap_init_i2c(i2c, &as3722_regmap_config);
|
|
if (IS_ERR(as3722->regmap)) {
|
|
ret = PTR_ERR(as3722->regmap);
|
|
dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = as3722_check_device_id(as3722);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
irq_flags = as3722->irq_flags | IRQF_ONESHOT;
|
|
ret = regmap_add_irq_chip(as3722->regmap, as3722->chip_irq,
|
|
irq_flags, -1, &as3722_irq_chip,
|
|
&as3722->irq_data);
|
|
if (ret < 0) {
|
|
dev_err(as3722->dev, "Failed to add regmap irq: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = as3722_configure_pullups(as3722);
|
|
if (ret < 0)
|
|
goto scrub;
|
|
|
|
ret = mfd_add_devices(&i2c->dev, -1, as3722_devs,
|
|
ARRAY_SIZE(as3722_devs), NULL, 0,
|
|
regmap_irq_get_domain(as3722->irq_data));
|
|
if (ret) {
|
|
dev_err(as3722->dev, "Failed to add MFD devices: %d\n", ret);
|
|
goto scrub;
|
|
}
|
|
|
|
dev_dbg(as3722->dev, "AS3722 core driver initialized successfully\n");
|
|
return 0;
|
|
|
|
scrub:
|
|
regmap_del_irq_chip(as3722->chip_irq, as3722->irq_data);
|
|
return ret;
|
|
}
|
|
|
|
static int as3722_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
struct as3722 *as3722 = i2c_get_clientdata(i2c);
|
|
|
|
mfd_remove_devices(as3722->dev);
|
|
regmap_del_irq_chip(as3722->chip_irq, as3722->irq_data);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id as3722_of_match[] = {
|
|
{ .compatible = "ams,as3722", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, as3722_of_match);
|
|
|
|
static const struct i2c_device_id as3722_i2c_id[] = {
|
|
{ "as3722", 0 },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, as3722_i2c_id);
|
|
|
|
static struct i2c_driver as3722_i2c_driver = {
|
|
.driver = {
|
|
.name = "as3722",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = as3722_of_match,
|
|
},
|
|
.probe = as3722_i2c_probe,
|
|
.remove = as3722_i2c_remove,
|
|
.id_table = as3722_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(as3722_i2c_driver);
|
|
|
|
MODULE_DESCRIPTION("I2C support for AS3722 PMICs");
|
|
MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
|
|
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
|
|
MODULE_LICENSE("GPL");
|