2020-05-06 06:28:50

by Dillon Min

Subject: [PATCH 1/4] ARM: dts: stm32: Add drm panel ili9341 support for stm32f429-disco board

From: dillon min <[email protected]>

1, add stm32f429-disco ltdc pins mux config
2, add ltdc nodes pinned with ili9341
3, add spi5 node

Signed-off-by: dillon min <[email protected]>
---
arch/arm/boot/dts/stm32f4-pinctrl.dtsi | 67 ++++++++++++++++++++++++++++++++++
arch/arm/boot/dts/stm32f429-disco.dts | 40 ++++++++++++++++++++
2 files changed, 107 insertions(+)

diff --git a/arch/arm/boot/dts/stm32f4-pinctrl.dtsi b/arch/arm/boot/dts/stm32f4-pinctrl.dtsi
index 392fa14..0eb107f 100644
--- a/arch/arm/boot/dts/stm32f4-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32f4-pinctrl.dtsi
@@ -316,6 +316,73 @@
};
};

+ ltdc_pins_f429_disco: ltdc-1 {
+ pins {
+ pinmux = <STM32_PINMUX('C', 6, AF14)>,
+ /* LCD_HSYNC */
+ <STM32_PINMUX('A', 4, AF14)>,
+ /* LCD_VSYNC */
+ <STM32_PINMUX('G', 7, AF14)>,
+ /* LCD_CLK */
+ <STM32_PINMUX('C', 10, AF14)>,
+ /* LCD_R2 */
+ <STM32_PINMUX('B', 0, AF9)>,
+ /* LCD_R3 */
+ <STM32_PINMUX('A', 11, AF14)>,
+ /* LCD_R4 */
+ <STM32_PINMUX('A', 12, AF14)>,
+ /* LCD_R5 */
+ <STM32_PINMUX('B', 1, AF9)>,
+ /* LCD_R6*/
+ <STM32_PINMUX('G', 6, AF14)>,
+ /* LCD_R7 */
+ <STM32_PINMUX('A', 6, AF14)>,
+ /* LCD_G2 */
+ <STM32_PINMUX('G', 10, AF9)>,
+ /* LCD_G3 */
+ <STM32_PINMUX('B', 10, AF14)>,
+ /* LCD_G4 */
+ <STM32_PINMUX('D', 6, AF14)>,
+ /* LCD_B2 */
+ <STM32_PINMUX('G', 11, AF14)>,
+ /* LCD_B3*/
+ <STM32_PINMUX('B', 11, AF14)>,
+ /* LCD_G5 */
+ <STM32_PINMUX('C', 7, AF14)>,
+ /* LCD_G6 */
+ <STM32_PINMUX('D', 3, AF14)>,
+ /* LCD_G7 */
+ <STM32_PINMUX('G', 12, AF9)>,
+ /* LCD_B4 */
+ <STM32_PINMUX('A', 3, AF14)>,
+ /* LCD_B5 */
+ <STM32_PINMUX('B', 8, AF14)>,
+ /* LCD_B6 */
+ <STM32_PINMUX('B', 9, AF14)>,
+ /* LCD_B7 */
+ <STM32_PINMUX('F', 10, AF14)>;
+ /* LCD_DE */
+ slew-rate = <2>;
+ };
+ };
+
+ spi5_pins: spi5-0 {
+ pins1 {
+ pinmux = <STM32_PINMUX('F', 7, AF5)>,
+ /* SPI5_CLK */
+ <STM32_PINMUX('F', 9, AF5)>;
+ /* SPI5_MOSI */
+ bias-disable;
+ drive-push-pull;
+ slew-rate = <0>;
+ };
+ pins2 {
+ pinmux = <STM32_PINMUX('F', 8, AF5)>;
+ /* SPI5_MISO */
+ bias-disable;
+ };
+ };
+
dcmi_pins: dcmi-0 {
pins {
pinmux = <STM32_PINMUX('A', 4, AF13)>, /* DCMI_HSYNC */
diff --git a/arch/arm/boot/dts/stm32f429-disco.dts b/arch/arm/boot/dts/stm32f429-disco.dts
index 30c0f67..3aadddb 100644
--- a/arch/arm/boot/dts/stm32f429-disco.dts
+++ b/arch/arm/boot/dts/stm32f429-disco.dts
@@ -49,6 +49,8 @@
#include "stm32f429.dtsi"
#include "stm32f429-pinctrl.dtsi"
#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/gpio/gpio.h>

/ {
model = "STMicroelectronics STM32F429i-DISCO board";
@@ -127,3 +129,41 @@
pinctrl-names = "default";
status = "okay";
};
+
+&ltdc {
+ status = "okay";
+ pinctrl-0 = <&ltdc_pins_f429_disco>;
+ pinctrl-names = "default";
+
+ port {
+ ltdc_out_rgb: endpoint {
+ remote-endpoint = <&panel_in_rgb>;
+ };
+ };
+};
+
+&spi5 {
+ status = "okay";
+ pinctrl-0 = <&spi5_pins>;
+ pinctrl-names = "default";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cs-gpios = <&gpioc 2 GPIO_ACTIVE_LOW>;
+ dmas = <&dma2 3 2 0x400 0x0>,
+ <&dma2 4 2 0x400 0x0>;
+ dma-names = "rx", "tx";
+ display: display@0{
+ /* Connect panel-ilitek-9341 to ltdc */
+ compatible = "stm32f429-disco,ltdc-panel", "ilitek,ili9341";
+ reg = <0>;
+ spi-3wire;
+ spi-max-frequency = <10000000>;
+ dc-gpios = <&gpiod 13 0>;
+ port {
+ panel_in_rgb: endpoint {
+ remote-endpoint = <&ltdc_out_rgb>;
+ };
+ };
+ };
+};
+
--
2.7.4