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mfd: Add tps65910 device-tree support 

Add device tree based initialization support for TI's tps65910 pmic.

Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Rhyland Klein 2012-05-11 11:36:26 +02:00 committed by Samuel Ortiz
parent 1291aa4573
commit cd4209ced4
1 changed files with 79 additions and 1 deletions
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80
drivers/mfd/tps65910.c
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@ -23,6 +23,7 @@
#include <linux/mfd/core.h>
#include <linux/regmap.h>
#include <linux/mfd/tps65910.h>
#include <linux/of_device.h>
static struct mfd_cell tps65910s[] = {
{
@ -129,6 +130,77 @@ static int __devinit tps65910_sleepinit(struct tps65910 *tps65910,
return ret;
}
#ifdef CONFIG_OF
static struct of_device_id tps65910_of_match[] = {
{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
{ },
};
MODULE_DEVICE_TABLE(of, tps65910_of_match);
static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
int *chip_id)
{
struct device_node *np = client->dev.of_node;
struct tps65910_board *board_info;
unsigned int prop;
const struct of_device_id *match;
unsigned int prop_array[TPS6591X_MAX_NUM_GPIO];
int ret = 0;
int idx;
match = of_match_device(tps65910_of_match, &client->dev);
if (!match) {
dev_err(&client->dev, "Failed to find matching dt id\n");
return NULL;
}
*chip_id = (int)match->data;
board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
GFP_KERNEL);
if (!board_info) {
dev_err(&client->dev, "Failed to allocate pdata\n");
return NULL;
}
ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
if (!ret)
board_info->vmbch_threshold = prop;
else if (*chip_id == TPS65911)
dev_warn(&client->dev, "VMBCH-Threshold not specified");
ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
if (!ret)
board_info->vmbch2_threshold = prop;
else if (*chip_id == TPS65911)
dev_warn(&client->dev, "VMBCH2-Threshold not specified");
ret = of_property_read_u32_array(np, "ti,en-gpio-sleep",
prop_array, TPS6591X_MAX_NUM_GPIO);
if (!ret)
for (idx = 0; idx < ARRAY_SIZE(prop_array); idx++)
board_info->en_gpio_sleep[idx] = (prop_array[idx] != 0);
else if (ret != -EINVAL) {
dev_err(&client->dev,
"error reading property ti,en-gpio-sleep: %d\n.", ret);
return NULL;
}
board_info->irq = client->irq;
board_info->irq_base = -1;
board_info->gpio_base = -1;
return board_info;
}
#else
static inline struct tps65910_board *tps65910_parse_dt(
struct i2c_client *client)
{
return NULL;
}
#endif
static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
@ -137,8 +209,13 @@ static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
struct tps65910_board *pmic_plat_data;
struct tps65910_platform_data *init_data;
int ret = 0;
int chip_id = id->driver_data;
pmic_plat_data = dev_get_platdata(&i2c->dev);
if (!pmic_plat_data && i2c->dev.of_node)
pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
if (!pmic_plat_data)
return -EINVAL;
@ -155,7 +232,7 @@ static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
i2c_set_clientdata(i2c, tps65910);
tps65910->dev = &i2c->dev;
tps65910->i2c_client = i2c;
tps65910->id = id->driver_data;
tps65910->id = chip_id;
mutex_init(&tps65910->io_mutex);
tps65910->regmap = regmap_init_i2c(i2c, &tps65910_regmap_config);
@ -215,6 +292,7 @@ static struct i2c_driver tps65910_i2c_driver = {
.driver = {
.name = "tps65910",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(tps65910_of_match),
},
.probe = tps65910_i2c_probe,
.remove = __devexit_p(tps65910_i2c_remove),