diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0524-dtoverlays-Add-overlay-for-ST7735R-160x128-TinyDRM-d.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0524-dtoverlays-Add-overlay-for-ST7735R-160x128-TinyDRM-d.patch | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0524-dtoverlays-Add-overlay-for-ST7735R-160x128-TinyDRM-d.patch b/target/linux/bcm27xx/patches-5.15/950-0524-dtoverlays-Add-overlay-for-ST7735R-160x128-TinyDRM-d.patch new file mode 100644 index 0000000000..987bdee290 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0524-dtoverlays-Add-overlay-for-ST7735R-160x128-TinyDRM-d.patch @@ -0,0 +1,140 @@ +From 67cd4f249333f3de9b449b9e6ebadd08facc6957 Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Mon, 4 Oct 2021 14:15:38 +0100 +Subject: [PATCH] dtoverlays: Add overlay for ST7735R (160x128) TinyDRM + driver + +Adds an overlay to configure the TinyDRM driver for ST7735R +based 160x128 and 128x128 (untested) displays such as the +Adafruit 1.8" display. + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> +--- + arch/arm/boot/dts/overlays/Makefile | 1 + + arch/arm/boot/dts/overlays/README | 14 ++++ + .../dts/overlays/adafruit-st7735r-overlay.dts | 83 +++++++++++++++++++ + 3 files changed, 98 insertions(+) + create mode 100644 arch/arm/boot/dts/overlays/adafruit-st7735r-overlay.dts + +--- a/arch/arm/boot/dts/overlays/Makefile ++++ b/arch/arm/boot/dts/overlays/Makefile +@@ -4,6 +4,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += overlay_ma + + dtbo-$(CONFIG_ARCH_BCM2835) += \ + act-led.dtbo \ ++ adafruit-st7735r.dtbo \ + adafruit18.dtbo \ + adau1977-adc.dtbo \ + adau7002-simple.dtbo \ +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -299,9 +299,23 @@ Params: activelow Set to " + REQUIRED + + ++Name: adafruit-st7735r ++Info: Overlay for the SPI-connected Adafruit 1.8" 160x128 or 128x128 displays, ++ based on the ST7735R chip. ++ This overlay uses the newer DRM/KMS "Tiny" driver. ++Load: dtoverlay=adafruit-st7735r,<param>=<val> ++Params: 128x128 Select the 128x128 driver (default 160x128) ++ rotate Display rotation {0,90,180,270} (default 90) ++ speed SPI bus speed in Hz (default 4000000) ++ dc_pin GPIO pin for D/C (default 24) ++ reset_pin GPIO pin for RESET (default 25) ++ led_pin GPIO used to control backlight (default 18) ++ ++ + Name: adafruit18 + Info: Overlay for the SPI-connected Adafruit 1.8" display (based on the + ST7735R chip). It includes support for the "green tab" version. ++ This overlay uses the older fbtft driver. + Load: dtoverlay=adafruit18,<param>=<val> + Params: green Use the adafruit18_green variant. + rotate Display rotation {0,90,180,270} +--- /dev/null ++++ b/arch/arm/boot/dts/overlays/adafruit-st7735r-overlay.dts +@@ -0,0 +1,83 @@ ++/* ++ * adafruit-st7735r-overlay.dts ++ * ++ * ST7735R based SPI LCD displays. Either ++ * Adafruit 1.8" 160x128 ++ * or ++ * Okaya 1.44" 128x128 ++ */ ++ ++/dts-v1/; ++/plugin/; ++ ++#include <dt-bindings/gpio/gpio.h> ++ ++/ { ++ compatible = "brcm,bcm2835"; ++ ++ fragment@0 { ++ target = <&spidev0>; ++ __overlay__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ fragment@1 { ++ target = <&gpio>; ++ __overlay__ { ++ adafruit_pins: adafruit_pins { ++ brcm,pins = <25 24>; ++ brcm,function = <1>; /* out */ ++ }; ++ backlight_pins: backlight_pins { ++ brcm,pins = <18>; ++ brcm,function = <1>; /* out */ ++ }; ++ }; ++ }; ++ ++ fragment@2 { ++ target-path = "/"; ++ __overlay__ { ++ af18_backlight: backlight { ++ compatible = "gpio-backlight"; ++ gpios = <&gpio 18 GPIO_ACTIVE_HIGH>; ++ pinctrl-names = "default"; ++ pinctrl-0 = <&backlight_pins>; ++ }; ++ }; ++ }; ++ ++ fragment@3 { ++ target = <&spi0>; ++ __overlay__ { ++ /* needed to avoid dtc warning */ ++ #address-cells = <1>; ++ #size-cells = <0>; ++ status = "okay"; ++ ++ af18: adafruit18@0 { ++ compatible = "jianda,jd-t18003-t01"; ++ reg = <0>; ++ spi-max-frequency = <32000000>; ++ dc-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>; ++ reset-gpios = <&gpio 25 GPIO_ACTIVE_HIGH>; ++ rotate = <90>; ++ pinctrl-names = "default"; ++ pinctrl-0 = <&adafruit_pins>; ++ backlight = <&af18_backlight>; ++ }; ++ }; ++ }; ++ ++ __overrides__ { ++ 128x128 = <&af18>, "compatible=okaya,rh128128t"; ++ speed = <&af18>,"spi-max-frequency:0"; ++ rotate = <&af18>,"rotate:0"; ++ dc_pin = <&af18>,"dc-gpios:4", <&adafruit_pins>,"brcm,pins:4"; ++ reset_pin = <&af18>,"reset-gpios:4", ++ <&adafruit_pins>,"brcm,pins:0"; ++ led_pin = <&af18_backlight>,"gpios:4", ++ <&backlight_pins>,"brcm,pins:0"; ++ }; ++}; |