leds: add output driver configuration for pca9633 led driver

the pca9633 leds driver can be used in open-drain or totem pole (a.k.a.
push/pull) output driver mode; default is the later

the patch allows to set the output driver mode using platform data (similar to
configuration inferface provided by the tca6507 led driver)

v2: move leds-pca9633.h to include/linux/platform_data/ (Bryan Wu)

Signed-off-by: Peter Meerwald <p.meerwald@bct-electronic.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>

2 files changed, 47 insertions, 7 deletions

diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c
index edcd706c5631..2f2f9c43535d 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/platform_data/leds-pca9633.h>
 
 /* LED select registers determine the source that drives LED outputs */
 #define PCA9633_LED_OFF         0x0     /* LED driver off */
@@ -96,13 +97,13 @@ static int __devinit pca9633_probe(struct i2c_client *client,
                                         const struct i2c_device_id *id)
 {
         struct pca9633_led *pca9633;
-        struct led_platform_data *pdata;
+        struct pca9633_platform_data *pdata;
         int i, err;
 
         pdata = client->dev.platform_data;
 
         if (pdata) {
-                if (pdata->num_leds <= 0 || pdata->num_leds > 4) {
+                if (pdata->leds.num_leds <= 0 || pdata->leds.num_leds > 4) {
                         dev_err(&client->dev, "board info must claim at most 4 LEDs");
                         return -EINVAL;
                 }
@@ -119,14 +120,14 @@ static int __devinit pca9633_probe(struct i2c_client *client,
                 pca9633[i].led_num = i;
 
                 /* Platform data can specify LED names and default triggers */
-                if (pdata && i < pdata->num_leds) {
-                        if (pdata->leds[i].name)
+                if (pdata && i < pdata->leds.num_leds) {
+                        if (pdata->leds.leds[i].name)
                                 snprintf(pca9633[i].name,
                                          sizeof(pca9633[i].name), "pca9633:%s",
-                                         pdata->leds[i].name);
-                        if (pdata->leds[i].default_trigger)
+                                         pdata->leds.leds[i].name);
+                        if (pdata->leds.leds[i].default_trigger)
                                 pca9633[i].led_cdev.default_trigger =
-                                        pdata->leds[i].default_trigger;
+                                        pdata->leds.leds[i].default_trigger;
                 } else {
                         snprintf(pca9633[i].name, sizeof(pca9633[i].name),
                                  "pca9633:%d", i);
@@ -145,6 +146,10 @@ static int __devinit pca9633_probe(struct i2c_client *client,
         /* Disable LED all-call address and set normal mode */
         i2c_smbus_write_byte_data(client, PCA9633_MODE1, 0x00);
 
+        /* Configure output: open-drain or totem pole (push-pull) */
+        if (pdata && pdata->outdrv == PCA9633_OPEN_DRAIN)
+                i2c_smbus_write_byte_data(client, PCA9633_MODE2, 0x01);
+
         /* Turn off LEDs */
         i2c_smbus_write_byte_data(client, PCA9633_LEDOUT, 0x00);
 
diff --git a/include/linux/platform_data/leds-pca9633.h b/include/linux/platform_data/leds-pca9633.h
new file mode 100644
index 000000000000..c5bf29b6fa7f
--- /dev/null
+++ b/include/linux/platform_data/leds-pca9633.h
@@ -0,0 +1,35 @@
+/*
+ * PCA9633 LED chip driver.
+ *
+ * Copyright 2012 bct electronic GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef __LINUX_PCA9633_H
+#define __LINUX_PCA9633_H
+#include <linux/leds.h>
+
+enum pca9633_outdrv {
+        PCA9633_OPEN_DRAIN,
+        PCA9633_TOTEM_POLE, /* aka push-pull */
+};
+
+struct pca9633_platform_data {
+        struct led_platform_data leds;
+        enum pca9633_outdrv outdrv;
+};
+
+#endif /* __LINUX_PCA9633_H*/