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author | Heiko Stübner <heiko.stuebner@bqreaders.com> | 2014-01-27 12:37:21 -0800 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-01-27 22:35:42 -0800 |
commit | 6f2e6c9b451b907b693b7fe3db3792e57796ffea (patch) | |
tree | 51e90a88b27ab1d41659685cf95d43f9e5a300f8 /drivers/input/touchscreen/zforce_ts.c | |
parent | 8727336481a231ee986c214dde06338e7e52624c (diff) | |
download | linux-6f2e6c9b451b907b693b7fe3db3792e57796ffea.tar.bz2 |
Input: zforce - add devicetree support
This makes the zforce driver usable on devicetree-based platforms too.
Signed-off-by: Heiko Stuebner <heiko.stuebner@bqreaders.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/touchscreen/zforce_ts.c')
-rw-r--r-- | drivers/input/touchscreen/zforce_ts.c | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/drivers/input/touchscreen/zforce_ts.c b/drivers/input/touchscreen/zforce_ts.c index 91f4c7cb5dd5..bdc936cb8445 100644 --- a/drivers/input/touchscreen/zforce_ts.c +++ b/drivers/input/touchscreen/zforce_ts.c @@ -29,6 +29,8 @@ #include <linux/sysfs.h> #include <linux/input/mt.h> #include <linux/platform_data/zforce_ts.h> +#include <linux/of.h> +#include <linux/of_gpio.h> #define WAIT_TIMEOUT msecs_to_jiffies(1000) @@ -681,6 +683,45 @@ static void zforce_reset(void *data) gpio_set_value(ts->pdata->gpio_rst, 0); } +static struct zforce_ts_platdata *zforce_parse_dt(struct device *dev) +{ + struct zforce_ts_platdata *pdata; + struct device_node *np = dev->of_node; + + if (!np) + return ERR_PTR(-ENOENT); + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(dev, "failed to allocate platform data\n"); + return ERR_PTR(-ENOMEM); + } + + pdata->gpio_int = of_get_gpio(np, 0); + if (!gpio_is_valid(pdata->gpio_int)) { + dev_err(dev, "failed to get interrupt gpio\n"); + return ERR_PTR(-EINVAL); + } + + pdata->gpio_rst = of_get_gpio(np, 1); + if (!gpio_is_valid(pdata->gpio_rst)) { + dev_err(dev, "failed to get reset gpio\n"); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32(np, "x-size", &pdata->x_max)) { + dev_err(dev, "failed to get x-size property\n"); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32(np, "y-size", &pdata->y_max)) { + dev_err(dev, "failed to get y-size property\n"); + return ERR_PTR(-EINVAL); + } + + return pdata; +} + static int zforce_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -689,8 +730,11 @@ static int zforce_probe(struct i2c_client *client, struct input_dev *input_dev; int ret; - if (!pdata) - return -EINVAL; + if (!pdata) { + pdata = zforce_parse_dt(&client->dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } ts = devm_kzalloc(&client->dev, sizeof(struct zforce_ts), GFP_KERNEL); if (!ts) @@ -826,11 +870,20 @@ static struct i2c_device_id zforce_idtable[] = { }; MODULE_DEVICE_TABLE(i2c, zforce_idtable); +#ifdef CONFIG_OF +static struct of_device_id zforce_dt_idtable[] = { + { .compatible = "neonode,zforce" }, + {}, +}; +MODULE_DEVICE_TABLE(of, zforce_dt_idtable); +#endif + static struct i2c_driver zforce_driver = { .driver = { .owner = THIS_MODULE, .name = "zforce-ts", .pm = &zforce_pm_ops, + .of_match_table = of_match_ptr(zforce_dt_idtable), }, .probe = zforce_probe, .id_table = zforce_idtable, |