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Commit 0846fcd0 authored by Xu Kai's avatar Xu Kai
Browse files

msm: camera: add LED torch driver 



User space should access the proper torch led sysfs node whose
driver is implemented according to led trigger frame work, so
camera need to provide such a node.

CRs-Fixed: 537513
Change-Id: I67458c16bf823824896051b93a6eb3067d5ae993
Signed-off-by: default avatarXu Kai <kaixu@codeaurora.org>
parent 568a7d3d

drivers/media/platform/msm/camera_v2/sensor/flash/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -4,3 +4,4 @@ obj-$(CONFIG_MSMB_CAMERA) += msm_led_flash.o 
obj-$(CONFIG_MSMB_CAMERA) += msm_led_trigger.o

obj-$(CONFIG_MSMB_CAMERA) += msm_led_i2c_trigger.o

obj-$(CONFIG_MSMB_CAMERA) += adp1660.o

obj-$(CONFIG_MSMB_CAMERA) += msm_led_torch.o

drivers/media/platform/msm/camera_v2/sensor/flash/msm_led_torch.c

0 → 100644
+60 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only 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.

 *

 */



#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__



#include <linux/module.h>

#include "msm_led_flash.h"



static struct led_trigger *torch_trigger;



static void msm_led_torch_brightness_set(struct led_classdev *led_cdev,

				enum led_brightness value)

{

	if (!torch_trigger) {

		pr_err("No torch trigger found, can't set brightness\n");

		return;

	}



	led_trigger_event(torch_trigger, value);

};



static struct led_classdev msm_torch_led = {

	.name			= "torch-light",

	.brightness_set	= msm_led_torch_brightness_set,

	.brightness		= LED_OFF,

};



int32_t msm_led_torch_create_classdev(struct platform_device *pdev,

				void *data)

{

	int rc;

	struct msm_led_flash_ctrl_t *fctrl =

		(struct msm_led_flash_ctrl_t *)data;



	if (!fctrl || !fctrl->torch_trigger) {

		pr_err("Invalid fctrl or torch trigger\n");

		return -EINVAL;

	}



	torch_trigger = fctrl->torch_trigger;

	msm_led_torch_brightness_set(&msm_torch_led, LED_OFF);



	rc = led_classdev_register(&pdev->dev, &msm_torch_led);

	if (rc) {

		pr_err("Failed to register led dev. rc = %d\n", rc);

		return rc;

	}



	return 0;

};

drivers/media/platform/msm/camera_v2/sensor/flash/msm_led_trigger.c

+7 −0
Original line number Diff line number Diff line
@@ -26,6 +26,9 @@ 
#define CDBG(fmt, args...) do { } while (0)

#endif



extern int32_t msm_led_torch_create_classdev(

				struct platform_device *pdev, void *data);



static struct msm_led_flash_ctrl_t fctrl;



static int32_t msm_led_trigger_get_subdev_id(struct msm_led_flash_ctrl_t *fctrl,
@@ -209,7 +212,11 @@ static int32_t msm_led_trigger_probe(struct platform_device *pdev) 
			of_node_put(flash_src_node);

		}

	}



	rc = msm_led_flash_create_v4lsubdev(pdev, &fctrl);

	if (!rc)

		msm_led_torch_create_classdev(pdev, &fctrl);



	return rc;

}