mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 05:32:00 +00:00
mfd: da9150: Add support for Fuel-Gauge
Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Adam Thomson
Lee Jones
parent
1f93e4a96c
commit
1ac710e08a
@ -23,6 +23,77 @@
|
||||
#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(®_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) {
|
||||
@ -107,6 +178,28 @@ static const struct regmap_config da9150_regmap_config = {
|
||||
.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;
|
||||
@ -297,19 +390,35 @@ static struct resource da9150_charger_resources[] = {
|
||||
},
|
||||
};
|
||||
|
||||
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,
|
||||
@ -317,6 +426,7 @@ static int da9150_probe(struct i2c_client *client,
|
||||
{
|
||||
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);
|
||||
@ -335,16 +445,41 @@ static int da9150_probe(struct i2c_client *client,
|
||||
return ret;
|
||||
}
|
||||
|
||||
da9150->irq_base = pdata ? pdata->irq_base : -1;
|
||||
/* 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)
|
||||
return ret;
|
||||
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,
|
||||
@ -352,11 +487,17 @@ static int da9150_probe(struct i2c_client *client,
|
||||
da9150->irq_base, NULL);
|
||||
if (ret) {
|
||||
dev_err(da9150->dev, "Failed to add child devices: %d\n", ret);
|
||||
regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data);
|
||||
return 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)
|
||||
@ -365,6 +506,7 @@ static int da9150_remove(struct i2c_client *client)
|
||||
|
||||
regmap_del_irq_chip(da9150->irq, da9150->regmap_irq_data);
|
||||
mfd_remove_devices(da9150->dev);
|
||||
i2c_unregister_device(da9150->core_qif);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -15,6 +15,7 @@
|
||||
#define __DA9150_CORE_H
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/regmap.h>
|
||||
|
||||
@ -46,23 +47,39 @@
|
||||
#define DA9150_IRQ_GPADC 19
|
||||
#define DA9150_IRQ_WKUP 20
|
||||
|
||||
/* I2C sub-device address */
|
||||
#define DA9150_QIF_I2C_ADDR_LSB 0x5
|
||||
|
||||
struct da9150_fg_pdata {
|
||||
u32 update_interval; /* msecs */
|
||||
u8 warn_soc_lvl; /* % value */
|
||||
u8 crit_soc_lvl; /* % value */
|
||||
};
|
||||
|
||||
struct da9150_pdata {
|
||||
int irq_base;
|
||||
struct da9150_fg_pdata *fg_pdata;
|
||||
};
|
||||
|
||||
struct da9150 {
|
||||
struct device *dev;
|
||||
struct regmap *regmap;
|
||||
struct i2c_client *core_qif;
|
||||
|
||||
struct regmap_irq_chip_data *regmap_irq_data;
|
||||
int irq;
|
||||
int irq_base;
|
||||
};
|
||||
|
||||
/* Device I/O */
|
||||
/* Device I/O - Query Interface for FG and standard register access */
|
||||
void da9150_read_qif(struct da9150 *da9150, u8 addr, int count, u8 *buf);
|
||||
void da9150_write_qif(struct da9150 *da9150, u8 addr, int count, const u8 *buf);
|
||||
|
||||
u8 da9150_reg_read(struct da9150 *da9150, u16 reg);
|
||||
void da9150_reg_write(struct da9150 *da9150, u16 reg, u8 val);
|
||||
void da9150_set_bits(struct da9150 *da9150, u16 reg, u8 mask, u8 val);
|
||||
|
||||
void da9150_bulk_read(struct da9150 *da9150, u16 reg, int count, u8 *buf);
|
||||
void da9150_bulk_write(struct da9150 *da9150, u16 reg, int count, const u8 *buf);
|
||||
|
||||
#endif /* __DA9150_CORE_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user