[PATCH 1/2 v4] drm/panel: Add DT bindings for Samsung LMS380KF01

[Linus Walleij]

This adds device tree bindings for the Samsung Mobile Displays
LMS380KF01 RGB DPI display panel.

Cc: devicetree at vger.kernel.org
Cc: phone-devel at vger.kernel.org
Cc: Noralf Trønnes <noralf at tronnes.org>
Reviewed-by: Sam Ravnborg <sam at ravnborg.org>
Reviewed-by: Douglas Anderson <dianders at chromium.org>
Reviewed-by: Rob Herring <robh at kernel.org>
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
ChangeLog v3->v4:
- Collect a few Reviewed-by's
- Mention that the node must be an SPI child.
- Indent example by 4 spaces.
- Resend with the driver updates.
ChangeLog v2->v3:
- No changes just resending with the series.
ChangeLog v1->v2:
- Expect SPI bindings to be pulled in for the client and state
  spi-cpha: true etc.
- Make port a required node.
- Update the example to use a proper SPI controller (spi-gpio)
  so we get full validation of the example.
---
 .../display/panel/samsung,lms380kf01.yaml     | 99 +++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/samsung,lms380kf01.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/samsung,lms380kf01.yaml b/Documentation/devicetree/bindings/display/panel/samsung,lms380kf01.yaml
new file mode 100644
index 000000000000..251f0c7115aa
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/samsung,lms380kf01.yaml
@@ -0,0 +1,99 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/samsung,lms380kf01.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung LMS380KF01 display panel
+
+description: The LMS380KF01 is a 480x800 DPI display panel from Samsung Mobile
+  Displays (SMD) utilizing the WideChips WS2401 display controller. It can be
+  used with internal or external backlight control.
+  The panel must obey the rules for a SPI slave device as specified in
+  spi/spi-controller.yaml
+
+maintainers:
+  - Linus Walleij <linus.walleij at linaro.org>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    const: samsung,lms380kf01
+
+  reg: true
+
+  interrupts:
+    description: provides an optional ESD (electrostatic discharge)
+      interrupt that signals abnormalities in the display hardware.
+      This can also be raised for other reasons like erroneous
+      configuration.
+    maxItems: 1
+
+  reset-gpios: true
+
+  vci-supply:
+    description: regulator that supplies the VCI analog voltage
+      usually around 3.0 V
+
+  vccio-supply:
+    description: regulator that supplies the VCCIO voltage usually
+      around 1.8 V
+
+  backlight: true
+
+  spi-cpha: true
+
+  spi-cpol: true
+
+  spi-max-frequency:
+    maximum: 1200000
+
+  port: true
+
+required:
+  - compatible
+  - reg
+  - spi-cpha
+  - spi-cpol
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+        compatible = "spi-gpio";
+        sck-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+        miso-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+        mosi-gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
+        cs-gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
+        num-chipselects = <1>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel at 0 {
+            compatible = "samsung,lms380kf01";
+            spi-max-frequency = <1200000>;
+            spi-cpha;
+            spi-cpol;
+            reg = <0>;
+            vci-supply = <&lcd_3v0_reg>;
+            vccio-supply = <&lcd_1v8_reg>;
+            reset-gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+            interrupt-parent = <&gpio>;
+            interrupts = <5 IRQ_TYPE_EDGE_RISING>;
+
+            port {
+                panel_in: endpoint {
+                    remote-endpoint = <&display_out>;
+                };
+            };
+        };
+    };
+
+...
-- 
2.31.1