diff options
| author | Karol Lewandowski <k.lewandowsk@samsung.com> | 2012-02-22 22:06:22 +0400 |
|---|---|---|
| committer | Anton Vorontsov <anton.vorontsov@linaro.org> | 2012-03-26 20:40:51 +0400 |
| commit | 3832246ddd83391187edff8af328f9e9684d3177 (patch) | |
| tree | 7bff3e3b63074d1397a256acc145ab8e97e74bab /drivers/power/max17042_battery.c | |
| parent | 2f3b43423c70a340b715396f15096c496da959bb (diff) | |
| download | linux-3832246ddd83391187edff8af328f9e9684d3177.tar.xz | |
max17042_battery: Make it possible to instantiate driver from DT
Allow both device tree (preferred) and platform data-based driver
instantiation.
Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Diffstat (limited to 'drivers/power/max17042_battery.c')
| -rw-r--r-- | drivers/power/max17042_battery.c | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c index 872e9b4a5ade..e36763a4f0f0 100644 --- a/drivers/power/max17042_battery.c +++ b/drivers/power/max17042_battery.c @@ -31,6 +31,7 @@ #include <linux/mod_devicetable.h> #include <linux/power_supply.h> #include <linux/power/max17042_battery.h> +#include <linux/of.h> /* Status register bits */ #define STATUS_POR_BIT (1 << 1) @@ -608,6 +609,40 @@ static void max17042_init_worker(struct work_struct *work) chip->init_complete = 1; } +#ifdef CONFIG_OF +static struct max17042_platform_data * +max17042_get_pdata(struct device *dev) +{ + struct device_node *np = dev->of_node; + u32 prop; + struct max17042_platform_data *pdata; + + if (!np) + return dev->platform_data; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return NULL; + + /* + * Require current sense resistor value to be specified for + * current-sense functionality to be enabled at all. + */ + if (of_property_read_u32(np, "maxim,rsns-microohm", &prop) == 0) { + pdata->r_sns = prop; + pdata->enable_current_sense = true; + } + + return pdata; +} +#else +static struct max17042_platform_data * +max17042_get_pdata(struct device *dev) +{ + return dev->platform_data; +} +#endif + static int __devinit max17042_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -624,7 +659,11 @@ static int __devinit max17042_probe(struct i2c_client *client, return -ENOMEM; chip->client = client; - chip->pdata = client->dev.platform_data; + chip->pdata = max17042_get_pdata(&client->dev); + if (!chip->pdata) { + dev_err(&client->dev, "no platform data provided\n"); + return -EINVAL; + } i2c_set_clientdata(client, chip); @@ -689,6 +728,14 @@ static int __devexit max17042_remove(struct i2c_client *client) return 0; } +#ifdef CONFIG_OF +static const struct of_device_id max17042_dt_match[] = { + { .compatible = "maxim,max17042" }, + { }, +}; +MODULE_DEVICE_TABLE(of, max17042_dt_match); +#endif + static const struct i2c_device_id max17042_id[] = { { "max17042", 0 }, { } @@ -698,6 +745,7 @@ MODULE_DEVICE_TABLE(i2c, max17042_id); static struct i2c_driver max17042_i2c_driver = { .driver = { .name = "max17042", + .of_match_table = of_match_ptr(max17042_dt_match), }, .probe = max17042_probe, .remove = __devexit_p(max17042_remove), |