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SubjectRe: [PATCH v3 1/2] leds: mt6360: Add LED driver for MT6360
Pavel Machek <pavel@ucw.cz> 於 2020年9月9日 週三 上午6:25寫道:
>
> Hi!
>
> > From: Gene Chen <gene_chen@richtek.com>
> >
> > Add MT6360 LED driver include 2-channel Flash LED with torch/strobe mode,
> > and 4-channel RGB LED support Register/Flash/Breath Mode
> >
> > Signed-off-by: Gene Chen <gene_chen@richtek.com>
> > ---
> > drivers/leds/Kconfig | 11 +
> > drivers/leds/Makefile | 1 +
> > drivers/leds/leds-mt6360.c | 681 +++++++++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 693 insertions(+)
> > create mode 100644 drivers/leds/leds-mt6360.c
> >
> > + help
> > + This option enables support for dual Flash LED drivers found on
> > + Mediatek MT6360 PMIC.
> > + Independent current sources supply for each flash LED support torch and strobe mode.
> > + Includes Low-VF and short protection.
> > +
>
> 80 columns. And perhaps user does not need to know about protections... and actually
> about independend sources, either.
>

ACK

> "Enable this for RGB LED and flash LED support on..."?
>
> > +static int mt6360_torch_brightness_set(struct led_classdev *lcdev, enum led_brightness level)
> > +{
> > + 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

> 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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