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Commit 2f73c392 authored by Peter Meerwald's avatar Peter Meerwald Committed by Bryan Wu
Browse files

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: default avatarPeter Meerwald <p.meerwald@bct-electronic.com>
Signed-off-by: default avatarBryan Wu <bryan.wu@canonical.com>
parent e76a322a

drivers/leds/leds-pca9633.c

+12 −7
Original line number Diff line number Diff line
@@ -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);

include/linux/platform_data/leds-pca9633.h

0 → 100644
+35 −0
Original line number Diff line number Diff line 
/*

 * 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*/