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authorTony Lindgren <tmlind@panda>2013-06-26 14:52:49 +0200
committerBryan Wu <cooloney@gmail.com>2013-08-27 02:22:10 +0200
commit81d22878092feab779f3efaab404036d31dc06f8 (patch)
tree4472aad855b02ad6ece4819fe29612ace2526772 /drivers/leds
parentLinux 3.11-rc7 (diff)
downloadlinux-81d22878092feab779f3efaab404036d31dc06f8.tar.xz
linux-81d22878092feab779f3efaab404036d31dc06f8.zip
leds: Add device tree binding for pca9633
Similar to tca6507, we can just parse the standard LED properties for pca9633. Tested on a pca9632, which is compatible with pca9633. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-pca9633.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c
index 9aae5679ffb2..90935e465c4d 100644
--- a/drivers/leds/leds-pca9633.c
+++ b/drivers/leds/leds-pca9633.c
@@ -22,6 +22,7 @@
#include <linux/i2c.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
+#include <linux/of.h>
#include <linux/platform_data/leds-pca9633.h>
/* LED select registers determine the source that drives LED outputs */
@@ -93,6 +94,67 @@ static void pca9633_led_set(struct led_classdev *led_cdev,
schedule_work(&pca9633->work);
}
+#if IS_ENABLED(CONFIG_OF)
+static struct pca9633_platform_data *
+pca9633_dt_init(struct i2c_client *client)
+{
+ struct device_node *np = client->dev.of_node, *child;
+ struct pca9633_platform_data *pdata;
+ struct led_info *pca9633_leds;
+ int count;
+
+ count = of_get_child_count(np);
+ if (!count || count > 4)
+ return ERR_PTR(-ENODEV);
+
+ pca9633_leds = devm_kzalloc(&client->dev,
+ sizeof(struct led_info) * count, GFP_KERNEL);
+ if (!pca9633_leds)
+ return ERR_PTR(-ENOMEM);
+
+ for_each_child_of_node(np, child) {
+ struct led_info led;
+ u32 reg;
+ int res;
+
+ led.name =
+ of_get_property(child, "label", NULL) ? : child->name;
+ led.default_trigger =
+ of_get_property(child, "linux,default-trigger", NULL);
+ res = of_property_read_u32(child, "reg", &reg);
+ if (res != 0)
+ continue;
+ pca9633_leds[reg] = led;
+ }
+ pdata = devm_kzalloc(&client->dev,
+ sizeof(struct pca9633_platform_data), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->leds.leds = pca9633_leds;
+ pdata->leds.num_leds = count;
+
+ /* default to open-drain unless totem pole (push-pull) is specified */
+ if (of_property_read_bool(np, "nxp,totem-pole"))
+ pdata->outdrv = PCA9633_TOTEM_POLE;
+ else
+ pdata->outdrv = PCA9633_OPEN_DRAIN;
+
+ return pdata;
+}
+
+static const struct of_device_id of_pca9633_match[] = {
+ { .compatible = "nxp,pca963x", },
+ {},
+};
+#else
+static struct pca9633_platform_data *
+pca9633_dt_init(struct i2c_client *client)
+{
+ return ERR_PTR(-ENODEV);
+}
+#endif
+
static int pca9633_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -102,6 +164,14 @@ static int pca9633_probe(struct i2c_client *client,
pdata = client->dev.platform_data;
+ if (!pdata) {
+ pdata = pca9633_dt_init(client);
+ if (IS_ERR(pdata)) {
+ dev_warn(&client->dev, "could not parse configuration\n");
+ pdata = NULL;
+ }
+ }
+
if (pdata) {
if (pdata->leds.num_leds <= 0 || pdata->leds.num_leds > 4) {
dev_err(&client->dev, "board info must claim at most 4 LEDs");
@@ -181,6 +251,7 @@ static struct i2c_driver pca9633_driver = {
.driver = {
.name = "leds-pca9633",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(of_pca9633_match),
},
.probe = pca9633_probe,
.remove = pca9633_remove,