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Commit 81b84a6d authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
Browse files

backlight: qcom-spmi-wled: Add qpnp_wled_flash_led_prepare() API 



Similar to qpnp_flash_led_prepare() API, add an API for WLED
flash LED devices, qpnp_wled_flash_led_prepare() that can provide
the maximum current for flash/torch devices and maximum available
current for switch device supported by the peripheral. Camera
flash driver makes use of this to do certain operations before it
sends the request to trigger flash/torch.

Change-Id: Ieb8ed119f3d617694bf97c5ea71e1c3dac9baea1
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 90e0cee9

drivers/video/backlight/qcom-spmi-wled.c

+96 −0
Original line number Diff line number Diff line
@@ -27,6 +27,8 @@ 
#include <linux/regmap.h>

#include <linux/spinlock.h>

#include <linux/qpnp/qpnp-revid.h>

#include <linux/leds-qpnp-flash.h>

#include "../../leds/leds.h"



/* General definitions */

#define WLED_DEFAULT_BRIGHTNESS		2048
@@ -1433,6 +1435,100 @@ static u32 wled_values(const struct wled_var_cfg *cfg, u32 idx) 
	return idx;

}



static int wled_get_max_current(struct led_classdev *led_cdev,

					int *max_current)

{

	struct wled *wled;

	bool flash;



	if (!strcmp(led_cdev->name, "wled_flash")) {

		wled = container_of(led_cdev, struct wled, flash_cdev);

		flash = true;

	} else if (!strcmp(led_cdev->name, "wled_torch")) {

		wled = container_of(led_cdev, struct wled, torch_cdev);

		flash = false;

	} else {

		return -ENODEV;

	}



	if (flash)

		*max_current = wled->flash_cdev.max_brightness;

	else

		*max_current = wled->torch_cdev.max_brightness;



	return 0;

}



static int wled_get_max_avail_current(struct led_classdev *led_cdev,

					int *max_current)

{

	struct wled *wled;



	if (!strcmp(led_cdev->name, "wled_switch"))

		wled = container_of(led_cdev, struct wled, switch_cdev);

	else

		return -ENODEV;



	/*

	 * For now, return the max brightness. Later this will be replaced with

	 * the available current predicted based on battery parameters.

	 */



	*max_current = max(wled->flash_cdev.max_brightness,

			wled->torch_cdev.max_brightness);

	return 0;

}



int wled_flash_led_prepare(struct led_trigger *trig, int options,

				int *max_current)

{

	struct led_classdev *led_cdev;

	int rc;



	if (!(options & FLASH_LED_PREPARE_OPTIONS_MASK)) {

		pr_err("Invalid options %d\n", options);

		return -EINVAL;

	}



	if (!trig) {

		pr_err("Invalid led_trigger provided\n");

		return -EINVAL;

	}



	led_cdev = trigger_to_lcdev(trig);

	if (!led_cdev) {

		pr_err("Invalid led_cdev in trigger %s\n", trig->name);

		return -EINVAL;

	}



	switch (options) {

	case QUERY_MAX_CURRENT:

		rc = wled_get_max_current(led_cdev, max_current);

		if (rc < 0) {

			pr_err("Error in getting max_current for %s\n",

				led_cdev->name);

			return rc;

		}

	case QUERY_MAX_AVAIL_CURRENT:

		rc = wled_get_max_avail_current(led_cdev, max_current);

		if (rc < 0) {

			pr_err("Error in getting max_avail_current for %s\n",

				led_cdev->name);

			return rc;

		}

		break;

	case ENABLE_REGULATOR:

	case DISABLE_REGULATOR:

		/* Not supported */

		return 0;

	default:

		return -EINVAL;

	};



	return 0;

}

EXPORT_SYMBOL(wled_flash_led_prepare);



static int wled_flash_set_step_delay(struct wled *wled, int step_delay)

{

	int rc, table[8] = {50, 100, 150, 200, 250, 300, 350, 400};

include/linux/leds-qpnp-flash.h

+10 −0
Original line number Diff line number Diff line
@@ -24,5 +24,15 @@ 


int qpnp_flash_led_prepare(struct led_trigger *trig, int options,

					int *max_current);

#ifdef CONFIG_BACKLIGHT_QCOM_SPMI_WLED

int wled_flash_led_prepare(struct led_trigger *trig, int options,

					int *max_current);

#else

static inline int wled_flash_led_prepare(struct led_trigger *trig, int options,

					int *max_current)

{

	return -EINVAL;

}

#endif



#endif