Thread (26 messages) 26 messages, 6 authors, 2020-09-15

Re: [PATCH v3 1/2] leds: mt6360: Add LED driver for MT6360

From: Pavel Machek <hidden>
Date: 2020-09-10 12:36:14
Also in: linux-arm-kernel, linux-leds, linux-mediatek, lkml

Hi!
quoted
quoted
+{
+     struct mt6360_led *led = container_of(lcdev, struct mt6360_led, flash.led_cdev);
+     struct mt6360_priv *priv = led->priv;
+     u32 enable_mask = MT6360_TORCHEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
+     u32 val = (level) ? MT6360_FLCSEN_MASK(led->led_no) : 0;
+     u32 prev = priv->fled_torch_used, curr;
+     int ret;
+
+     dev_dbg(lcdev->dev, "[%d] brightness %d\n", led->led_no, level);
+     if (priv->fled_strobe_used) {
+             dev_warn(lcdev->dev, "Please disable strobe first [%d]\n", priv->fled_strobe_used);
+             return -EINVAL;
+     }
So... how does its userland interface look like?
1. set FLED1 brightness
# echo 1 > /sys/class/leds/white:flash1/flash_brightness
2. enable FLED1 strobe
# echo 1 > /sys/class/leds/white:flash1/flash_strobe
3 . turn off FLED1 strobe (just used to gaurantee the strobe mode
flash leds must be turned off)
# echo 0 > /sys/class/leds/white:flash1/flash_strobe
I believe I'd preffer only exposing torch functionality in
/sys/class/leds. .. strobe can be supported using v4l2 APIs.

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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