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path: root/drivers/leds/leds-mc13783.c
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Diffstat (limited to 'drivers/leds/leds-mc13783.c')
-rw-r--r--drivers/leds/leds-mc13783.c500
1 files changed, 222 insertions, 278 deletions
diff --git a/drivers/leds/leds-mc13783.c b/drivers/leds/leds-mc13783.c
index 8bc49154155..f1db88e2513 100644
--- a/drivers/leds/leds-mc13783.c
+++ b/drivers/leds/leds-mc13783.c
@@ -1,5 +1,5 @@
/*
- * LEDs driver for Freescale MC13783
+ * LEDs driver for Freescale MC13783/MC13892/MC34708
*
* Copyright (C) 2010 Philippe Rétornaz
*
@@ -17,143 +17,56 @@
#include <linux/module.h>
#include <linux/kernel.h>
-#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
+#include <linux/of.h>
#include <linux/workqueue.h>
#include <linux/mfd/mc13xxx.h>
-#include <linux/slab.h>
-struct mc13783_led {
+struct mc13xxx_led_devtype {
+ int led_min;
+ int led_max;
+ int num_regs;
+ u32 ledctrl_base;
+};
+
+struct mc13xxx_led {
struct led_classdev cdev;
struct work_struct work;
- struct mc13xxx *master;
enum led_brightness new_brightness;
int id;
+ struct mc13xxx_leds *leds;
};
-#define MC13783_REG_LED_CONTROL_0 51
-#define MC13783_LED_C0_ENABLE_BIT (1 << 0)
-#define MC13783_LED_C0_TRIODE_MD_BIT (1 << 7)
-#define MC13783_LED_C0_TRIODE_AD_BIT (1 << 8)
-#define MC13783_LED_C0_TRIODE_KP_BIT (1 << 9)
-#define MC13783_LED_C0_BOOST_BIT (1 << 10)
-#define MC13783_LED_C0_ABMODE_MASK 0x7
-#define MC13783_LED_C0_ABMODE 11
-#define MC13783_LED_C0_ABREF_MASK 0x3
-#define MC13783_LED_C0_ABREF 14
-
-#define MC13783_REG_LED_CONTROL_1 52
-#define MC13783_LED_C1_TC1HALF_BIT (1 << 18)
-
-#define MC13783_REG_LED_CONTROL_2 53
-#define MC13783_LED_C2_BL_P_MASK 0xf
-#define MC13783_LED_C2_MD_P 9
-#define MC13783_LED_C2_AD_P 13
-#define MC13783_LED_C2_KP_P 17
-#define MC13783_LED_C2_BL_C_MASK 0x7
-#define MC13783_LED_C2_MD_C 0
-#define MC13783_LED_C2_AD_C 3
-#define MC13783_LED_C2_KP_C 6
-
-#define MC13783_REG_LED_CONTROL_3 54
-#define MC13783_LED_C3_TC_P 6
-#define MC13783_LED_C3_TC_P_MASK 0x1f
-
-#define MC13783_REG_LED_CONTROL_4 55
-#define MC13783_REG_LED_CONTROL_5 56
-
-#define MC13783_LED_Cx_PERIOD 21
-#define MC13783_LED_Cx_PERIOD_MASK 0x3
-#define MC13783_LED_Cx_SLEWLIM_BIT (1 << 23)
-#define MC13783_LED_Cx_TRIODE_TC_BIT (1 << 23)
-#define MC13783_LED_Cx_TC_C_MASK 0x3
-
-static void mc13783_led_work(struct work_struct *work)
-{
- struct mc13783_led *led = container_of(work, struct mc13783_led, work);
- int reg = 0;
- int mask = 0;
- int value = 0;
- int bank, off, shift;
-
- switch (led->id) {
- case MC13783_LED_MD:
- reg = MC13783_REG_LED_CONTROL_2;
- mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_MD_P;
- value = (led->new_brightness >> 4) << MC13783_LED_C2_MD_P;
- break;
- case MC13783_LED_AD:
- reg = MC13783_REG_LED_CONTROL_2;
- mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_AD_P;
- value = (led->new_brightness >> 4) << MC13783_LED_C2_AD_P;
- break;
- case MC13783_LED_KP:
- reg = MC13783_REG_LED_CONTROL_2;
- mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_KP_P;
- value = (led->new_brightness >> 4) << MC13783_LED_C2_KP_P;
- break;
- case MC13783_LED_R1:
- case MC13783_LED_G1:
- case MC13783_LED_B1:
- case MC13783_LED_R2:
- case MC13783_LED_G2:
- case MC13783_LED_B2:
- case MC13783_LED_R3:
- case MC13783_LED_G3:
- case MC13783_LED_B3:
- off = led->id - MC13783_LED_R1;
- bank = off/3;
- reg = MC13783_REG_LED_CONTROL_3 + off/3;
- shift = (off - bank * 3) * 5 + MC13783_LED_C3_TC_P;
- value = (led->new_brightness >> 3) << shift;
- mask = MC13783_LED_C3_TC_P_MASK << shift;
- break;
- }
-
- mc13xxx_lock(led->master);
-
- mc13xxx_reg_rmw(led->master, reg, mask, value);
-
- mc13xxx_unlock(led->master);
-}
+struct mc13xxx_leds {
+ struct mc13xxx *master;
+ struct mc13xxx_led_devtype *devtype;
+ int num_leds;
+ struct mc13xxx_led *led;
+};
-static void mc13783_led_set(struct led_classdev *led_cdev,
- enum led_brightness value)
+static unsigned int mc13xxx_max_brightness(int id)
{
- struct mc13783_led *led;
+ if (id >= MC13783_LED_MD && id <= MC13783_LED_KP)
+ return 0x0f;
+ else if (id >= MC13783_LED_R1 && id <= MC13783_LED_B3)
+ return 0x1f;
- led = container_of(led_cdev, struct mc13783_led, cdev);
- led->new_brightness = value;
- schedule_work(&led->work);
+ return 0x3f;
}
-static int __devinit mc13783_led_setup(struct mc13783_led *led, int max_current)
+static void mc13xxx_led_work(struct work_struct *work)
{
- int shift = 0;
- int mask = 0;
- int value = 0;
- int reg = 0;
- int ret, bank;
+ struct mc13xxx_led *led = container_of(work, struct mc13xxx_led, work);
+ struct mc13xxx_leds *leds = led->leds;
+ unsigned int reg, bank, off, shift;
switch (led->id) {
case MC13783_LED_MD:
- shift = MC13783_LED_C2_MD_C;
- mask = MC13783_LED_C2_BL_C_MASK;
- value = max_current & MC13783_LED_C2_BL_C_MASK;
- reg = MC13783_REG_LED_CONTROL_2;
- break;
case MC13783_LED_AD:
- shift = MC13783_LED_C2_AD_C;
- mask = MC13783_LED_C2_BL_C_MASK;
- value = max_current & MC13783_LED_C2_BL_C_MASK;
- reg = MC13783_REG_LED_CONTROL_2;
- break;
case MC13783_LED_KP:
- shift = MC13783_LED_C2_KP_C;
- mask = MC13783_LED_C2_BL_C_MASK;
- value = max_current & MC13783_LED_C2_BL_C_MASK;
- reg = MC13783_REG_LED_CONTROL_2;
+ reg = 2;
+ shift = 9 + (led->id - MC13783_LED_MD) * 4;
break;
case MC13783_LED_R1:
case MC13783_LED_G1:
@@ -164,230 +77,261 @@ static int __devinit mc13783_led_setup(struct mc13783_led *led, int max_current)
case MC13783_LED_R3:
case MC13783_LED_G3:
case MC13783_LED_B3:
- bank = (led->id - MC13783_LED_R1)/3;
- reg = MC13783_REG_LED_CONTROL_3 + bank;
- shift = ((led->id - MC13783_LED_R1) - bank * 3) * 2;
- mask = MC13783_LED_Cx_TC_C_MASK;
- value = max_current & MC13783_LED_Cx_TC_C_MASK;
+ off = led->id - MC13783_LED_R1;
+ bank = off / 3;
+ reg = 3 + bank;
+ shift = (off - bank * 3) * 5 + 6;
+ break;
+ case MC13892_LED_MD:
+ case MC13892_LED_AD:
+ case MC13892_LED_KP:
+ reg = (led->id - MC13892_LED_MD) / 2;
+ shift = 3 + (led->id - MC13892_LED_MD) * 12;
+ break;
+ case MC13892_LED_R:
+ case MC13892_LED_G:
+ case MC13892_LED_B:
+ off = led->id - MC13892_LED_R;
+ bank = off / 2;
+ reg = 2 + bank;
+ shift = (off - bank * 2) * 12 + 3;
break;
+ case MC34708_LED_R:
+ case MC34708_LED_G:
+ reg = 0;
+ shift = 3 + (led->id - MC34708_LED_R) * 12;
+ break;
+ default:
+ BUG();
}
- mc13xxx_lock(led->master);
+ mc13xxx_reg_rmw(leds->master, leds->devtype->ledctrl_base + reg,
+ mc13xxx_max_brightness(led->id) << shift,
+ led->new_brightness << shift);
+}
- ret = mc13xxx_reg_rmw(led->master, reg, mask << shift,
- value << shift);
+static void mc13xxx_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct mc13xxx_led *led =
+ container_of(led_cdev, struct mc13xxx_led, cdev);
- mc13xxx_unlock(led->master);
- return ret;
+ led->new_brightness = value;
+ schedule_work(&led->work);
}
-static int __devinit mc13783_leds_prepare(struct platform_device *pdev)
+#ifdef CONFIG_OF
+static struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
+ struct platform_device *pdev)
{
- struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
- struct mc13xxx *dev = dev_get_drvdata(pdev->dev.parent);
- int ret = 0;
- int reg = 0;
+ struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
+ struct mc13xxx_leds_platform_data *pdata;
+ struct device_node *parent, *child;
+ struct device *dev = &pdev->dev;
+ int i = 0, ret = -ENODATA;
- mc13xxx_lock(dev);
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
- if (pdata->flags & MC13783_LED_TC1HALF)
- reg |= MC13783_LED_C1_TC1HALF_BIT;
+ of_node_get(dev->parent->of_node);
- if (pdata->flags & MC13783_LED_SLEWLIMTC)
- reg |= MC13783_LED_Cx_SLEWLIM_BIT;
+ parent = of_find_node_by_name(dev->parent->of_node, "leds");
+ if (!parent)
+ goto out_node_put;
- ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_1, reg);
+ ret = of_property_read_u32_array(parent, "led-control",
+ pdata->led_control,
+ leds->devtype->num_regs);
if (ret)
- goto out;
+ goto out_node_put;
- reg = (pdata->bl_period & MC13783_LED_Cx_PERIOD_MASK) <<
- MC13783_LED_Cx_PERIOD;
+ pdata->num_leds = of_get_child_count(parent);
- if (pdata->flags & MC13783_LED_SLEWLIMBL)
- reg |= MC13783_LED_Cx_SLEWLIM_BIT;
+ pdata->led = devm_kzalloc(dev, pdata->num_leds * sizeof(*pdata->led),
+ GFP_KERNEL);
+ if (!pdata->led) {
+ ret = -ENOMEM;
+ goto out_node_put;
+ }
- ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_2, reg);
- if (ret)
- goto out;
+ for_each_child_of_node(parent, child) {
+ const char *str;
+ u32 tmp;
- reg = (pdata->tc1_period & MC13783_LED_Cx_PERIOD_MASK) <<
- MC13783_LED_Cx_PERIOD;
+ if (of_property_read_u32(child, "reg", &tmp))
+ continue;
+ pdata->led[i].id = leds->devtype->led_min + tmp;
- if (pdata->flags & MC13783_LED_TRIODE_TC1)
- reg |= MC13783_LED_Cx_TRIODE_TC_BIT;
+ if (!of_property_read_string(child, "label", &str))
+ pdata->led[i].name = str;
+ if (!of_property_read_string(child, "linux,default-trigger",
+ &str))
+ pdata->led[i].default_trigger = str;
- ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_3, reg);
- if (ret)
- goto out;
+ i++;
+ }
- reg = (pdata->tc2_period & MC13783_LED_Cx_PERIOD_MASK) <<
- MC13783_LED_Cx_PERIOD;
+ pdata->num_leds = i;
+ ret = i > 0 ? 0 : -ENODATA;
- if (pdata->flags & MC13783_LED_TRIODE_TC2)
- reg |= MC13783_LED_Cx_TRIODE_TC_BIT;
+out_node_put:
+ of_node_put(parent);
- ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_4, reg);
- if (ret)
- goto out;
+ return ret ? ERR_PTR(ret) : pdata;
+}
+#else
+static inline struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt(
+ struct platform_device *pdev)
+{
+ return ERR_PTR(-ENOSYS);
+}
+#endif
- reg = (pdata->tc3_period & MC13783_LED_Cx_PERIOD_MASK) <<
- MC13783_LED_Cx_PERIOD;
+static int __init mc13xxx_led_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(dev);
+ struct mc13xxx *mcdev = dev_get_drvdata(dev->parent);
+ struct mc13xxx_led_devtype *devtype =
+ (struct mc13xxx_led_devtype *)pdev->id_entry->driver_data;
+ struct mc13xxx_leds *leds;
+ int i, id, ret = -ENODATA;
+ u32 init_led = 0;
+
+ leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
+ if (!leds)
+ return -ENOMEM;
- if (pdata->flags & MC13783_LED_TRIODE_TC3)
- reg |= MC13783_LED_Cx_TRIODE_TC_BIT;
+ leds->devtype = devtype;
+ leds->master = mcdev;
+ platform_set_drvdata(pdev, leds);
- ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_5, reg);
- if (ret)
- goto out;
-
- reg = MC13783_LED_C0_ENABLE_BIT;
- if (pdata->flags & MC13783_LED_TRIODE_MD)
- reg |= MC13783_LED_C0_TRIODE_MD_BIT;
- if (pdata->flags & MC13783_LED_TRIODE_AD)
- reg |= MC13783_LED_C0_TRIODE_AD_BIT;
- if (pdata->flags & MC13783_LED_TRIODE_KP)
- reg |= MC13783_LED_C0_TRIODE_KP_BIT;
- if (pdata->flags & MC13783_LED_BOOST_EN)
- reg |= MC13783_LED_C0_BOOST_BIT;
-
- reg |= (pdata->abmode & MC13783_LED_C0_ABMODE_MASK) <<
- MC13783_LED_C0_ABMODE;
- reg |= (pdata->abref & MC13783_LED_C0_ABREF_MASK) <<
- MC13783_LED_C0_ABREF;
-
- ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_0, reg);
-
-out:
- mc13xxx_unlock(dev);
- return ret;
-}
+ if (dev->parent->of_node) {
+ pdata = mc13xxx_led_probe_dt(pdev);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ } else if (!pdata)
+ return -ENODATA;
-static int __devinit mc13783_led_probe(struct platform_device *pdev)
-{
- struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
- struct mc13xxx_led_platform_data *led_cur;
- struct mc13783_led *led, *led_dat;
- int ret, i;
- int init_led = 0;
-
- if (pdata == NULL) {
- dev_err(&pdev->dev, "missing platform data\n");
- return -ENODEV;
- }
+ leds->num_leds = pdata->num_leds;
- if (pdata->num_leds < 1 || pdata->num_leds > (MC13783_LED_MAX + 1)) {
- dev_err(&pdev->dev, "Invalid led count %d\n", pdata->num_leds);
+ if ((leds->num_leds < 1) ||
+ (leds->num_leds > (devtype->led_max - devtype->led_min + 1))) {
+ dev_err(dev, "Invalid LED count %d\n", leds->num_leds);
return -EINVAL;
}
- led = kzalloc(sizeof(*led) * pdata->num_leds, GFP_KERNEL);
- if (led == NULL) {
- dev_err(&pdev->dev, "failed to alloc memory\n");
+ leds->led = devm_kzalloc(dev, leds->num_leds * sizeof(*leds->led),
+ GFP_KERNEL);
+ if (!leds->led)
return -ENOMEM;
- }
- ret = mc13783_leds_prepare(pdev);
- if (ret) {
- dev_err(&pdev->dev, "unable to init led driver\n");
- goto err_free;
+ for (i = 0; i < devtype->num_regs; i++) {
+ ret = mc13xxx_reg_write(mcdev, leds->devtype->ledctrl_base + i,
+ pdata->led_control[i]);
+ if (ret)
+ return ret;
}
- for (i = 0; i < pdata->num_leds; i++) {
- led_dat = &led[i];
- led_cur = &pdata->led[i];
+ for (i = 0; i < leds->num_leds; i++) {
+ const char *name, *trig;
- if (led_cur->id > MC13783_LED_MAX || led_cur->id < 0) {
- dev_err(&pdev->dev, "invalid id %d\n", led_cur->id);
- ret = -EINVAL;
- goto err_register;
- }
+ ret = -EINVAL;
- if (init_led & (1 << led_cur->id)) {
- dev_err(&pdev->dev, "led %d already initialized\n",
- led_cur->id);
- ret = -EINVAL;
- goto err_register;
+ id = pdata->led[i].id;
+ name = pdata->led[i].name;
+ trig = pdata->led[i].default_trigger;
+
+ if ((id > devtype->led_max) || (id < devtype->led_min)) {
+ dev_err(dev, "Invalid ID %i\n", id);
+ break;
}
- init_led |= 1 << led_cur->id;
- led_dat->cdev.name = led_cur->name;
- led_dat->cdev.default_trigger = led_cur->default_trigger;
- led_dat->cdev.brightness_set = mc13783_led_set;
- led_dat->cdev.brightness = LED_OFF;
- led_dat->id = led_cur->id;
- led_dat->master = dev_get_drvdata(pdev->dev.parent);
+ if (init_led & (1 << id)) {
+ dev_warn(dev, "LED %i already initialized\n", id);
+ break;
+ }
- INIT_WORK(&led_dat->work, mc13783_led_work);
+ init_led |= 1 << id;
+ leds->led[i].id = id;
+ leds->led[i].leds = leds;
+ leds->led[i].cdev.name = name;
+ leds->led[i].cdev.default_trigger = trig;
+ leds->led[i].cdev.flags = LED_CORE_SUSPENDRESUME;
+ leds->led[i].cdev.brightness_set = mc13xxx_led_set;
+ leds->led[i].cdev.max_brightness = mc13xxx_max_brightness(id);
- ret = led_classdev_register(pdev->dev.parent, &led_dat->cdev);
- if (ret) {
- dev_err(&pdev->dev, "failed to register led %d\n",
- led_dat->id);
- goto err_register;
- }
+ INIT_WORK(&leds->led[i].work, mc13xxx_led_work);
- ret = mc13783_led_setup(led_dat, led_cur->max_current);
+ ret = led_classdev_register(dev->parent, &leds->led[i].cdev);
if (ret) {
- dev_err(&pdev->dev, "unable to init led %d\n",
- led_dat->id);
- i++;
- goto err_register;
+ dev_err(dev, "Failed to register LED %i\n", id);
+ break;
}
}
- platform_set_drvdata(pdev, led);
- return 0;
-
-err_register:
- for (i = i - 1; i >= 0; i--) {
- led_classdev_unregister(&led[i].cdev);
- cancel_work_sync(&led[i].work);
- }
+ if (ret)
+ while (--i >= 0) {
+ led_classdev_unregister(&leds->led[i].cdev);
+ cancel_work_sync(&leds->led[i].work);
+ }
-err_free:
- kfree(led);
return ret;
}
-static int __devexit mc13783_led_remove(struct platform_device *pdev)
+static int mc13xxx_led_remove(struct platform_device *pdev)
{
- struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
- struct mc13783_led *led = platform_get_drvdata(pdev);
- struct mc13xxx *dev = dev_get_drvdata(pdev->dev.parent);
+ struct mc13xxx_leds *leds = platform_get_drvdata(pdev);
int i;
- for (i = 0; i < pdata->num_leds; i++) {
- led_classdev_unregister(&led[i].cdev);
- cancel_work_sync(&led[i].work);
+ for (i = 0; i < leds->num_leds; i++) {
+ led_classdev_unregister(&leds->led[i].cdev);
+ cancel_work_sync(&leds->led[i].work);
}
- mc13xxx_lock(dev);
+ return 0;
+}
- mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_0, 0);
- mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_1, 0);
- mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_2, 0);
- mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_3, 0);
- mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_4, 0);
- mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_5, 0);
+static const struct mc13xxx_led_devtype mc13783_led_devtype = {
+ .led_min = MC13783_LED_MD,
+ .led_max = MC13783_LED_B3,
+ .num_regs = 6,
+ .ledctrl_base = 51,
+};
- mc13xxx_unlock(dev);
+static const struct mc13xxx_led_devtype mc13892_led_devtype = {
+ .led_min = MC13892_LED_MD,
+ .led_max = MC13892_LED_B,
+ .num_regs = 4,
+ .ledctrl_base = 51,
+};
- kfree(led);
- return 0;
-}
+static const struct mc13xxx_led_devtype mc34708_led_devtype = {
+ .led_min = MC34708_LED_R,
+ .led_max = MC34708_LED_G,
+ .num_regs = 1,
+ .ledctrl_base = 54,
+};
+
+static const struct platform_device_id mc13xxx_led_id_table[] = {
+ { "mc13783-led", (kernel_ulong_t)&mc13783_led_devtype, },
+ { "mc13892-led", (kernel_ulong_t)&mc13892_led_devtype, },
+ { "mc34708-led", (kernel_ulong_t)&mc34708_led_devtype, },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, mc13xxx_led_id_table);
-static struct platform_driver mc13783_led_driver = {
+static struct platform_driver mc13xxx_led_driver = {
.driver = {
- .name = "mc13783-led",
+ .name = "mc13xxx-led",
.owner = THIS_MODULE,
},
- .probe = mc13783_led_probe,
- .remove = __devexit_p(mc13783_led_remove),
+ .remove = mc13xxx_led_remove,
+ .id_table = mc13xxx_led_id_table,
};
+module_platform_driver_probe(mc13xxx_led_driver, mc13xxx_led_probe);
-module_platform_driver(mc13783_led_driver);
-
-MODULE_DESCRIPTION("LEDs driver for Freescale MC13783 PMIC");
+MODULE_DESCRIPTION("LEDs driver for Freescale MC13XXX PMIC");
MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>");
MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:mc13783-led");