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alistair23-linux/drivers/mfd/as3722.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

469 lines
12 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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>
*/
#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->en_ac_ok_pwr_on = of_property_read_bool(np,
"ams,enable-ac-ok-power-on");
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;
u8 val = 0;
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 = devm_regmap_add_irq_chip(as3722->dev, 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)
return ret;
if (as3722->en_ac_ok_pwr_on)
val = AS3722_CTRL_SEQU1_AC_OK_PWR_ON;
ret = as3722_update_bits(as3722, AS3722_CTRL_SEQU1_REG,
AS3722_CTRL_SEQU1_AC_OK_PWR_ON, val);
if (ret < 0) {
dev_err(as3722->dev, "CTRLsequ1 update failed: %d\n", ret);
return ret;
}
ret = devm_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);
return ret;
}
device_init_wakeup(as3722->dev, true);
dev_dbg(as3722->dev, "AS3722 core driver initialized successfully\n");
return 0;
}
static int __maybe_unused as3722_i2c_suspend(struct device *dev)
{
struct as3722 *as3722 = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
enable_irq_wake(as3722->chip_irq);
disable_irq(as3722->chip_irq);
return 0;
}
static int __maybe_unused as3722_i2c_resume(struct device *dev)
{
struct as3722 *as3722 = dev_get_drvdata(dev);
enable_irq(as3722->chip_irq);
if (device_may_wakeup(dev))
disable_irq_wake(as3722->chip_irq);
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 const struct dev_pm_ops as3722_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(as3722_i2c_suspend, as3722_i2c_resume)
};
static struct i2c_driver as3722_i2c_driver = {
.driver = {
.name = "as3722",
.of_match_table = as3722_of_match,
.pm = &as3722_pm_ops,
},
.probe = as3722_i2c_probe,
.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");
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