Commit 8992da44 authored by Robin van der Gracht's avatar Robin van der Gracht Committed by Greg Kroah-Hartman

auxdisplay: ht16k33: Driver for LED controller

Added a driver for the Holtek HT16K33 LED controller with keyscan.
Signed-off-by: default avatarRobin van der Gracht <robin@protonic.nl>
CC: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7279b238
Holtek ht16k33 RAM mapping 16*8 LED controller driver with keyscan
-------------------------------------------------------------------------------
Required properties:
- compatible: "holtek,ht16k33"
- reg: I2C slave address of the chip.
- interrupt-parent: A phandle pointing to the interrupt controller
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 milliseconds.
- 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 = "holtek,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_F10)
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)
>;
};
};
...@@ -128,4 +128,13 @@ config IMG_ASCII_LCD ...@@ -128,4 +128,13 @@ config IMG_ASCII_LCD
development boards such as the MIPS Boston, MIPS Malta & MIPS SEAD3 development boards such as the MIPS Boston, MIPS Malta & MIPS SEAD3
from Imagination Technologies. from Imagination Technologies.
config HT16K33
tristate "Holtek Ht16K33 LED controller with keyscan"
depends on FB && OF && I2C && INPUT
select INPUT_MATRIXKMAP
select FB_BACKLIGHT
help
Say yes here to add support for Holtek HT16K33, RAM mapping 16*8
LED controller driver with keyscan.
endif # AUXDISPLAY endif # AUXDISPLAY
...@@ -5,3 +5,4 @@ ...@@ -5,3 +5,4 @@
obj-$(CONFIG_KS0108) += ks0108.o obj-$(CONFIG_KS0108) += ks0108.o
obj-$(CONFIG_CFAG12864B) += cfag12864b.o cfag12864bfb.o obj-$(CONFIG_CFAG12864B) += cfag12864b.o cfag12864bfb.o
obj-$(CONFIG_IMG_ASCII_LCD) += img-ascii-lcd.o obj-$(CONFIG_IMG_ASCII_LCD) += img-ascii-lcd.o
obj-$(CONFIG_HT16K33) += ht16k33.o
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