Adding support to generate platform data when kernel is configured through device tree.
Signed-off-by: Rhyland Klein <rkl...@nvidia.com> --- drivers/power/bq20z75.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 73 insertions(+), 0 deletions(-) diff --git a/drivers/power/bq20z75.c b/drivers/power/bq20z75.c index 9c5e5be..922f725 100644 --- a/drivers/power/bq20z75.c +++ b/drivers/power/bq20z75.c @@ -613,6 +613,76 @@ static void bq20z75_delayed_work(struct work_struct *work) } } +#if defined(CONFIG_OF) +#include <linux/of_device.h> +static const struct of_device_id bq20z75_dt_ids[] = { + { .compatible = "ti,bq20z75" }, + { } +}; +MODULE_DEVICE_TABLE(platform, bq20z75_dt_ids); + +static struct bq20z75_platform_data *bq20z75_of_populate_pdata( + struct i2c_client *client) +{ + const struct of_device_id *dtid; + struct device_node *of_node = client->dev.of_node; + struct bq20z75_platform_data *pdata = client->dev.platform_data; + int rc; + u32 prop; + + /* verify this driver matches this device */ + dtid = of_match_device(bq20z75_dt_ids, &client->dev); + if (!dtid) + return NULL; + + /* if platform data is set, honor it */ + if (pdata) + return pdata; + + /* first make sure at least one property is set, otherwise + * it won't change behavior from running without pdata. + */ + if (!of_get_property(of_node, "i2c-retry-count", NULL) && + !of_get_property(of_node, "poll-retry-count", NULL) && + !of_get_property(of_node, "battery-detect", NULL) && + !of_get_property(of_node, "battery-detect-present", NULL)) + goto of_out; + + pdata = devm_kzalloc(&client->dev, sizeof(struct bq20z75_platform_data), + GFP_KERNEL); + if (!pdata) + goto of_out; + + rc = of_property_read_u32(of_node, "i2c-retry-count", &prop); + if (!rc) + pdata->i2c_retry_count = prop; + + rc = of_property_read_u32(of_node, "battery-detect", &prop); + if (!rc) + pdata->battery_detect = prop; + else + pdata->battery_detect = -1; /*default is no gpio */ + + rc = of_property_read_u32(of_node, "battery-detect-present", &prop); + if (!rc) + pdata->battery_detect_present = prop; + + rc = of_property_read_u32(of_node, "poll-retry-count", &prop); + if (!rc) + pdata->poll_retry_count = prop; + +of_out: + return pdata; +} +#else +#define bq20z75_dt_ids NULL +static struct bq20z75_platform_data *bq20z75_of_populate_pdata( + struct i2c_client *client) +{ + return NULL; +} +#endif + static int __devinit bq20z75_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -642,6 +712,8 @@ static int __devinit bq20z75_probe(struct i2c_client *client, bq20z75_device->power_supply.external_power_changed = bq20z75_external_power_changed; + pdata = bq20z75_of_populate_pdata(client); + if (pdata) { bq20z75_device->gpio_detect = gpio_is_valid(pdata->battery_detect); @@ -775,6 +847,7 @@ static struct i2c_driver bq20z75_battery_driver = { .id_table = bq20z75_id, .driver = { .name = "bq20z75-battery", + .of_match_table = bq20z75_dt_ids, }, }; -- 1.7.6 _______________________________________________ devicetree-discuss mailing list devicetree-discuss@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss