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alistair23-linux/drivers/mfd/da9150-core.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* DA9150 Core MFD Driver
*
* Copyright (c) 2014 Dialog Semiconductor
*
* Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/da9150/core.h>
#include <linux/mfd/da9150/registers.h>
/* Raw device access, used for QIF */
static int da9150_i2c_read_device(struct i2c_client *client, u8 addr, int count,
u8 *buf)
{
struct i2c_msg xfer;
int ret;
/*
* Read is split into two transfers as device expects STOP/START rather
* than repeated start to carry out this kind of access.
*/
/* Write address */
xfer.addr = client->addr;
xfer.flags = 0;
xfer.len = 1;
xfer.buf = &addr;
ret = i2c_transfer(client->adapter, &xfer, 1);
if (ret != 1) {
if (ret < 0)
return ret;
else
return -EIO;
}
/* Read data */
xfer.addr = client->addr;
xfer.flags = I2C_M_RD;
xfer.len = count;
xfer.buf = buf;
ret = i2c_transfer(client->adapter, &xfer, 1);
if (ret == 1)
return 0;
else if (ret < 0)
return ret;
else
return -EIO;
}
static int da9150_i2c_write_device(struct i2c_client *client, u8 addr,
int count, const u8 *buf)
{
struct i2c_msg xfer;
u8 *reg_data;
int ret;
reg_data = kzalloc(1 + count, GFP_KERNEL);
if (!reg_data)
return -ENOMEM;
reg_data[0] = addr;
memcpy(&reg_data[1], buf, count);
/* Write address & data */
xfer.addr = client->addr;
xfer.flags = 0;
xfer.len = 1 + count;
xfer.buf = reg_data;
ret = i2c_transfer(client->adapter, &xfer, 1);
kfree(reg_data);
if (ret == 1)
return 0;
else if (ret < 0)
return ret;
else
return -EIO;
}
static bool da9150_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case DA9150_PAGE_CON:
case DA9150_STATUS_A:
case DA9150_STATUS_B:
case DA9150_STATUS_C:
case DA9150_STATUS_D:
case DA9150_STATUS_E:
case DA9150_STATUS_F:
case DA9150_STATUS_G:
case DA9150_STATUS_H:
case DA9150_STATUS_I:
case DA9150_STATUS_J:
case DA9150_STATUS_K:
case DA9150_STATUS_L:
case DA9150_STATUS_N:
case DA9150_FAULT_LOG_A:
case DA9150_FAULT_LOG_B:
case DA9150_EVENT_E:
case DA9150_EVENT_F:
case DA9150_EVENT_G:
case DA9150_EVENT_H:
case DA9150_CONTROL_B:
case DA9150_CONTROL_C:
case DA9150_GPADC_MAN:
case DA9150_GPADC_RES_A:
case DA9150_GPADC_RES_B:
case DA9150_ADETVB_CFG_C:
case DA9150_ADETD_STAT:
case DA9150_ADET_CMPSTAT:
case DA9150_ADET_CTRL_A:
case DA9150_PPR_TCTR_B:
case DA9150_COREBTLD_STAT_A:
case DA9150_CORE_DATA_A:
case DA9150_CORE_DATA_B:
case DA9150_CORE_DATA_C:
case DA9150_CORE_DATA_D:
case DA9150_CORE2WIRE_STAT_A:
case DA9150_FW_CTRL_C:
case DA9150_FG_CTRL_B:
case DA9150_FW_CTRL_B:
case DA9150_GPADC_CMAN:
case DA9150_GPADC_CRES_A:
case DA9150_GPADC_CRES_B:
case DA9150_CC_ICHG_RES_A:
case DA9150_CC_ICHG_RES_B:
case DA9150_CC_IAVG_RES_A:
case DA9150_CC_IAVG_RES_B:
case DA9150_TAUX_CTRL_A:
case DA9150_TAUX_VALUE_H:
case DA9150_TAUX_VALUE_L:
case DA9150_TBAT_RES_A:
case DA9150_TBAT_RES_B:
return true;
default:
return false;
}
}
static const struct regmap_range_cfg da9150_range_cfg[] = {
{
.range_min = DA9150_PAGE_CON,
.range_max = DA9150_TBAT_RES_B,
.selector_reg = DA9150_PAGE_CON,
.selector_mask = DA9150_I2C_PAGE_MASK,
.selector_shift = DA9150_I2C_PAGE_SHIFT,
.window_start = 0,
.window_len = 256,
},
};
static const struct regmap_config da9150_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.ranges = da9150_range_cfg,
.num_ranges = ARRAY_SIZE(da9150_range_cfg),
.max_register = DA9150_TBAT_RES_B,
.cache_type = REGCACHE_RBTREE,
.volatile_reg = da9150_volatile_reg,
};
void da9150_read_qif(struct da9150 *da9150, u8 addr, int count, u8 *buf)
{
int ret;
ret = da9150_i2c_read_device(da9150->core_qif, addr, count, buf);
if (ret < 0)
dev_err(da9150->dev, "Failed to read from QIF 0x%x: %d\n",
addr, ret);
}
EXPORT_SYMBOL_GPL(da9150_read_qif);
void da9150_write_qif(struct da9150 *da9150, u8 addr, int count, const u8 *buf)
{
int ret;
ret = da9150_i2c_write_device(da9150->core_qif, addr, count, buf);
if (ret < 0)
dev_err(da9150->dev, "Failed to write to QIF 0x%x: %d\n",
addr, ret);
}
EXPORT_SYMBOL_GPL(da9150_write_qif);
u8 da9150_reg_read(struct da9150 *da9150, u16 reg)
{
int val, ret;
ret = regmap_read(da9150->regmap, reg, &val);
if (ret)
dev_err(da9150->dev, "Failed to read from reg 0x%x: %d\n",
reg, ret);
return (u8) val;
}
EXPORT_SYMBOL_GPL(da9150_reg_read);
void da9150_reg_write(struct da9150 *da9150, u16 reg, u8 val)
{
int ret;
ret = regmap_write(da9150->regmap, reg, val);
if (ret)
dev_err(da9150->dev, "Failed to write to reg 0x%x: %d\n",
reg, ret);
}
EXPORT_SYMBOL_GPL(da9150_reg_write);
void da9150_set_bits(struct da9150 *da9150, u16 reg, u8 mask, u8 val)
{
int ret;
ret = regmap_update_bits(da9150->regmap, reg, mask, val);
if (ret)
dev_err(da9150->dev, "Failed to set bits in reg 0x%x: %d\n",
reg, ret);
}
EXPORT_SYMBOL_GPL(da9150_set_bits);
void da9150_bulk_read(struct da9150 *da9150, u16 reg, int count, u8 *buf)
{
int ret;
ret = regmap_bulk_read(da9150->regmap, reg, buf, count);
if (ret)
dev_err(da9150->dev, "Failed to bulk read from reg 0x%x: %d\n",
reg, ret);
}
EXPORT_SYMBOL_GPL(da9150_bulk_read);
void da9150_bulk_write(struct da9150 *da9150, u16 reg, int count, const u8 *buf)
{
int ret;
ret = regmap_raw_write(da9150->regmap, reg, buf, count);
if (ret)
dev_err(da9150->dev, "Failed to bulk write to reg 0x%x %d\n",
reg, ret);
}
EXPORT_SYMBOL_GPL(da9150_bulk_write);
static const struct regmap_irq da9150_irqs[] = {
[DA9150_IRQ_VBUS] = {
.reg_offset = 0,
.mask = DA9150_E_VBUS_MASK,
},
[DA9150_IRQ_CHG] = {
.reg_offset = 0,
.mask = DA9150_E_CHG_MASK,
},
[DA9150_IRQ_TCLASS] = {
.reg_offset = 0,
.mask = DA9150_E_TCLASS_MASK,
},
[DA9150_IRQ_TJUNC] = {
.reg_offset = 0,
.mask = DA9150_E_TJUNC_MASK,
},
[DA9150_IRQ_VFAULT] = {
.reg_offset = 0,
.mask = DA9150_E_VFAULT_MASK,
},
[DA9150_IRQ_CONF] = {
.reg_offset = 1,
.mask = DA9150_E_CONF_MASK,
},
[DA9150_IRQ_DAT] = {
.reg_offset = 1,
.mask = DA9150_E_DAT_MASK,
},
[DA9150_IRQ_DTYPE] = {
.reg_offset = 1,
.mask = DA9150_E_DTYPE_MASK,
},
[DA9150_IRQ_ID] = {
.reg_offset = 1,
.mask = DA9150_E_ID_MASK,
},
[DA9150_IRQ_ADP] = {
.reg_offset = 1,
.mask = DA9150_E_ADP_MASK,
},
[DA9150_IRQ_SESS_END] = {
.reg_offset = 1,
.mask = DA9150_E_SESS_END_MASK,
},
[DA9150_IRQ_SESS_VLD] = {
.reg_offset = 1,
.mask = DA9150_E_SESS_VLD_MASK,
},
[DA9150_IRQ_FG] = {
.reg_offset = 2,
.mask = DA9150_E_FG_MASK,
},
[DA9150_IRQ_GP] = {
.reg_offset = 2,
.mask = DA9150_E_GP_MASK,
},
[DA9150_IRQ_TBAT] = {
.reg_offset = 2,
.mask = DA9150_E_TBAT_MASK,
},
[DA9150_IRQ_GPIOA] = {
.reg_offset = 2,
.mask = DA9150_E_GPIOA_MASK,
},
[DA9150_IRQ_GPIOB] = {
.reg_offset = 2,
.mask = DA9150_E_GPIOB_MASK,
},
[DA9150_IRQ_GPIOC] = {
.reg_offset = 2,
.mask = DA9150_E_GPIOC_MASK,
},
[DA9150_IRQ_GPIOD] = {
.reg_offset = 2,
.mask = DA9150_E_GPIOD_MASK,
},
[DA9150_IRQ_GPADC] = {
.reg_offset = 2,
.mask = DA9150_E_GPADC_MASK,
},
[DA9150_IRQ_WKUP] = {
.reg_offset = 3,
.mask = DA9150_E_WKUP_MASK,
},
};
static const struct regmap_irq_chip da9150_regmap_irq_chip = {
.name = "da9150_irq",
.status_base = DA9150_EVENT_E,
.mask_base = DA9150_IRQ_MASK_E,
.ack_base = DA9150_EVENT_E,
.num_regs = DA9150_NUM_IRQ_REGS,
.irqs = da9150_irqs,
.num_irqs = ARRAY_SIZE(da9150_irqs),
};
static struct resource da9150_gpadc_resources[] = {
DEFINE_RES_IRQ_NAMED(DA9150_IRQ_GPADC, "GPADC"),
};
static struct resource da9150_charger_resources[] = {
DEFINE_RES_IRQ_NAMED(DA9150_IRQ_CHG, "CHG_STATUS"),
DEFINE_RES_IRQ_NAMED(DA9150_IRQ_TJUNC, "CHG_TJUNC"),
DEFINE_RES_IRQ_NAMED(DA9150_IRQ_VFAULT, "CHG_VFAULT"),
DEFINE_RES_IRQ_NAMED(DA9150_IRQ_VBUS, "CHG_VBUS"),
};
static struct resource da9150_fg_resources[] = {
DEFINE_RES_IRQ_NAMED(DA9150_IRQ_FG, "FG"),
};
enum da9150_dev_idx {
DA9150_GPADC_IDX = 0,
DA9150_CHARGER_IDX,
DA9150_FG_IDX,
};
static struct mfd_cell da9150_devs[] = {
[DA9150_GPADC_IDX] = {
.name = "da9150-gpadc",
.of_compatible = "dlg,da9150-gpadc",
.resources = da9150_gpadc_resources,
.num_resources = ARRAY_SIZE(da9150_gpadc_resources),
},
[DA9150_CHARGER_IDX] = {
.name = "da9150-charger",
.of_compatible = "dlg,da9150-charger",
.resources = da9150_charger_resources,
.num_resources = ARRAY_SIZE(da9150_charger_resources),
},
[DA9150_FG_IDX] = {
.name = "da9150-fuel-gauge",
.of_compatible = "dlg,da9150-fuel-gauge",
.resources = da9150_fg_resources,
.num_resources = ARRAY_SIZE(da9150_fg_resources),
},
};
static int da9150_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct da9150 *da9150;
struct da9150_pdata *pdata = dev_get_platdata(&client->dev);
int qif_addr;
int ret;
da9150 = devm_kzalloc(&client->dev, sizeof(*da9150), GFP_KERNEL);
if (!da9150)
return -ENOMEM;
da9150->dev = &client->dev;
da9150->irq = client->irq;
i2c_set_clientdata(client, da9150);
da9150->regmap = devm_regmap_init_i2c(client, &da9150_regmap_config);
if (IS_ERR(da9150->regmap)) {
ret = PTR_ERR(da9150->regmap);
dev_err(da9150->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
/* Setup secondary I2C interface for QIF access */
qif_addr = da9150_reg_read(da9150, DA9150_CORE2WIRE_CTRL_A);
qif_addr = (qif_addr & DA9150_CORE_BASE_ADDR_MASK) >> 1;
qif_addr |= DA9150_QIF_I2C_ADDR_LSB;
da9150->core_qif = i2c_new_dummy(client->adapter, qif_addr);
if (!da9150->core_qif) {
dev_err(da9150->dev, "Failed to attach QIF client\n");
return -ENODEV;
}
i2c_set_clientdata(da9150->core_qif, da9150);
if (pdata) {
da9150->irq_base = pdata->irq_base;
da9150_devs[DA9150_FG_IDX].platform_data = pdata->fg_pdata;
da9150_devs[DA9150_FG_IDX].pdata_size =
sizeof(struct da9150_fg_pdata);
} else {
da9150->irq_base = -1;
}
ret = regmap_add_irq_chip(da9150->regmap, da9150->irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
da9150->irq_base, &da9150_regmap_irq_chip,
&da9150->regmap_irq_data);
if (ret) {
dev_err(da9150->dev, "Failed to add regmap irq chip: %d\n",
ret);
goto regmap_irq_fail;
}
da9150->irq_base = regmap_irq_chip_get_base(da9150->regmap_irq_data);
enable_irq_wake(da9150->irq);
ret = mfd_add_devices(da9150->dev, -1, da9150_devs,
ARRAY_SIZE(da9150_devs), NULL,
da9150->irq_base, NULL);
if (ret) {
dev_err(da9150->dev, "Failed to add child devices: %d\n", ret);
goto mfd_fail;
}
return 0;
mfd_fail:
regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data);
regmap_irq_fail:
i2c_unregister_device(da9150->core_qif);
return ret;
}
static int da9150_remove(struct i2c_client *client)
{
struct da9150 *da9150 = i2c_get_clientdata(client);
regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data);
mfd_remove_devices(da9150->dev);
i2c_unregister_device(da9150->core_qif);
return 0;
}
static void da9150_shutdown(struct i2c_client *client)
{
struct da9150 *da9150 = i2c_get_clientdata(client);
/* Make sure we have a wakup source for the device */
da9150_set_bits(da9150, DA9150_CONFIG_D,
DA9150_WKUP_PM_EN_MASK,
DA9150_WKUP_PM_EN_MASK);
/* Set device to DISABLED mode */
da9150_set_bits(da9150, DA9150_CONTROL_C,
DA9150_DISABLE_MASK, DA9150_DISABLE_MASK);
}
static const struct i2c_device_id da9150_i2c_id[] = {
{ "da9150", },
{ }
};
MODULE_DEVICE_TABLE(i2c, da9150_i2c_id);
static const struct of_device_id da9150_of_match[] = {
{ .compatible = "dlg,da9150", },
{ }
};
MODULE_DEVICE_TABLE(of, da9150_of_match);
static struct i2c_driver da9150_driver = {
.driver = {
.name = "da9150",
.of_match_table = of_match_ptr(da9150_of_match),
},
.probe = da9150_probe,
.remove = da9150_remove,
.shutdown = da9150_shutdown,
.id_table = da9150_i2c_id,
};
module_i2c_driver(da9150_driver);
MODULE_DESCRIPTION("MFD Core Driver for DA9150");
MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
MODULE_LICENSE("GPL");
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