linux-kernel - Re: [PATCH v4 2/2] auxdisplay: ht16k33: Driver for LED controller

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Date:	Mon, 21 Mar 2016 09:09:13 +0100
From:	Robin van der Gracht <robin@...tonic.nl>
To:	Rob Herring <robh@...nel.org>
Cc:	Miguel Ojeda Sandonis <miguel.ojeda.sandonis@...il.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Thierry Reding <treding@...dia.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Lee Jones <lee.jones@...aro.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Stefan Wahren <stefan.wahren@...e.com>,
	Philipp Zabel <philipp.zabel@...il.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] auxdisplay: ht16k33: Driver for LED controller

On Fri, 18 Mar 2016 16:42:17 -0500
Rob Herring <robh@...nel.org> wrote:

> On Wed, Mar 16, 2016 at 04:52:09PM +0100, Robin van der Gracht wrote:
> > This is a driver for the Holtek HT16K33 RAM mapping LED controller
> > with keyscan.
> 
> Wrap your lines to less than 80 chars.

I must have missed that one..

> 
> > Signed-off-by: Robin van der Gracht <robin@...tonic.nl>
> > ---
> > 
> > Changes in v4:
> >  - Removed trailing dot from patch title
> >  - Removed unused defines
> >  - Fixed brightness range (0 was presumed to be off but its 1/16
> > duty cycle)
> >  - No longer checking 'reschedule' before setting it in
> > ht16k33_keypad_scan()
> >  - Use more efficient ffs() to find changed rows in
> > ht16k33_keypad_scan()
> >  - Use BIT macro in ht16k33_keypad_scan()
> >  - Removed extra space in return line from ht16k33_bl_check_fb()
> >  - Removed redundant 'Out of Memory' prints from ht16k33_probe()
> >  - Changed bustype from BUS_HOST to BUS_I2C
> > 
> >  .../devicetree/bindings/display/ht16k33.txt        |  42 ++
> >  drivers/auxdisplay/Kconfig                         |   9 +
> >  drivers/auxdisplay/Makefile                        |   1 +
> >  drivers/auxdisplay/ht16k33.c                       | 563
> > +++++++++++++++++++++ 4 files changed, 615 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/display/ht16k33.txt create mode
> > 100644 drivers/auxdisplay/ht16k33.c
> > 
> > diff --git a/Documentation/devicetree/bindings/display/ht16k33.txt
> > b/Documentation/devicetree/bindings/display/ht16k33.txt new file
> > mode 100644 index 0000000..20ef996
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/ht16k33.txt
> > @@ -0,0 +1,42 @@
> > +Holtek ht16k33 RAM mapping 16*8 LED controller driver with keyscan
> > +-------------------------------------------------------------------------------
> > +
> > +Required properties:
> > +- compatible:		"ht,ht16k33"
> > +- reg:			I2C slave address of the chip.
> > +- interrupt-parent:	A phandle pointing to the interrupt
> > controller\
> 
> Drop the \

Will do.

> 
> > +			serving the interrupt for this chip.
> > +- interrupts:		Interrupt specification for the key
> > pressed interrupt. +- refresh-rate-hz:	Display update
> > interval in HZ. +- debounce-delay-ms:	Debouncing interval
> > time in microseconds. +- linux,keymap: 	The keymap for keys
> > as described in the binding
> > +			document
> > (devicetree/bindings/input/matrix-keymap.txt). +
> > +Optional properties:
> > +- linux,no-autorepeat:	Disable keyrepeat.
> > +- default-brightness-level: Initial brightness level [0-15]
> > (default: 15). +
> > +Example:
> > +
> > +&i2c1 {
> > +	ht16k33: ht16k33@70 {
> > +		compatible = "ht,ht16k33";
> > +		reg = <0x70>;
> > +		refresh-rate-hz = <20>;
> > +		debounce-delay-ms = <50>;
> > +		interrupt-parent = <&gpio4>;
> > +		interrupts = <5 (IRQ_TYPE_LEVEL_HIGH |
> > IRQ_TYPE_EDGE_RISING)>;
> > +		linux,keymap = <
> > +			MATRIX_KEY(2, 0, KEY_F6)
> > +			MATRIX_KEY(3, 0, KEY_F8)
> > +			MATRIX_KEY(4, 0, KEY_F0)
> > +			MATRIX_KEY(5, 0, KEY_F4)
> > +			MATRIX_KEY(6, 0, KEY_F2)
> > +			MATRIX_KEY(2, 1, KEY_F5)
> > +			MATRIX_KEY(3, 1, KEY_F7)
> > +			MATRIX_KEY(4, 1, KEY_F9)
> > +			MATRIX_KEY(5, 1, KEY_F3)
> > +			MATRIX_KEY(6, 1, KEY_F1)
> > +		>;
> > +	};
> > +};

Best regards,

-- 
Robin van der Gracht
Protonic Holland