[PATCH] dt-bindings: display: ssd1307fb: Convert to json-schema
Geert Uytterhoeven
geert at linux-m68k.org
Tue May 18 07:51:31 UTC 2021
Convert the Solomon SSD1307 Framebuffer Device Tree binding
documentation to json-schema.
Fix the spelling of the "pwms" property.
Document default values.
Make properties with default values not required.
Signed-off-by: Geert Uytterhoeven <geert at linux-m68k.org>
---
I have listed Maxime as the maintainer, as he wrote the original driver
and bindings. Maxime: Please scream if this is inappropriate ;-)
---
.../bindings/display/solomon,ssd1307fb.yaml | 166 ++++++++++++++++++
.../devicetree/bindings/display/ssd1307fb.txt | 60 -------
2 files changed, 166 insertions(+), 60 deletions(-)
create mode 100644 Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
delete mode 100644 Documentation/devicetree/bindings/display/ssd1307fb.txt
diff --git a/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml b/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
new file mode 100644
index 0000000000000000..bd632d86a4f814a0
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
@@ -0,0 +1,166 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/solomon,ssd1307fb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Solomon SSD1307 OLED Controller Framebuffer
+
+maintainers:
+ - Maxime Ripard <mripard at kernel.org>
+
+properties:
+ compatible:
+ enum:
+ - solomon,ssd1305fb-i2c
+ - solomon,ssd1306fb-i2c
+ - solomon,ssd1307fb-i2c
+ - solomon,ssd1309fb-i2c
+
+ reg:
+ maxItems: 1
+
+ pwms:
+ maxItems: 1
+
+ reset-gpios:
+ maxItems: 1
+
+ vbat-supply:
+ description: The supply for VBAT
+
+ solomon,height:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 16
+ description:
+ Height in pixel of the screen driven by the controller
+
+ solomon,width:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 96
+ description:
+ Width in pixel of the screen driven by the controller
+
+ solomon,page-offset:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 1
+ description:
+ Offset of pages (band of 8 pixels) that the screen is mapped to
+
+ solomon,segment-no-remap:
+ type: boolean
+ description:
+ Display needs normal (non-inverted) data column to segment mapping
+
+ solomon,col-offset:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 0
+ description:
+ Offset of columns (COL/SEG) that the screen is mapped to
+
+ solomon,com-seq:
+ type: boolean
+ description:
+ Display uses sequential COM pin configuration
+
+ solomon,com-lrremap:
+ type: boolean
+ description:
+ Display uses left-right COM pin remap
+
+ solomon,com-invdir:
+ type: boolean
+ description:
+ Display uses inverted COM pin scan direction
+
+ solomon,com-offset:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 0
+ description:
+ Number of the COM pin wired to the first display line
+
+ solomon,prechargep1:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 2
+ description:
+ Length of deselect period (phase 1) in clock cycles
+
+ solomon,prechargep2:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 2
+ description:
+ Length of precharge period (phase 2) in clock cycles. This needs to be
+ the higher, the higher the capacitance of the OLED's pixels is.
+
+ solomon,dclk-div:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 1
+ maximum: 16
+ description:
+ Clock divisor. The default value is controller-dependent.
+
+ solomon,dclk-frq:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 0
+ maximum: 15
+ description:
+ Clock frequency, higher value means higher frequency.
+ The default value is controller-dependent.
+
+ solomon,lookup-table:
+ $ref: /schemas/types.yaml#/definitions/uint8-array
+ maxItems: 4
+ description:
+ 8 bit value array of current drive pulse widths for BANK0, and colors A,
+ B, and C. Each value in range of 31 to 63 for pulse widths of 32 to 64.
+ Color D is always width 64.
+
+ solomon,area-color-enable:
+ type: boolean
+ description:
+ Display uses color mode
+
+ solomon,low-power:
+ type: boolean
+ description:
+ Display runs in low power mode
+
+required:
+ - compatible
+ - reg
+
+if:
+ properties:
+ compatible:
+ contains:
+ const: solomon,ssd1307fb-i2c
+then:
+ required:
+ - pwms
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ssd1307: oled at 3c {
+ compatible = "solomon,ssd1307fb-i2c";
+ reg = <0x3c>;
+ pwms = <&pwm 4 3000>;
+ reset-gpios = <&gpio2 7>;
+ };
+
+ ssd1306: oled at 3d {
+ compatible = "solomon,ssd1306fb-i2c";
+ reg = <0x3c>;
+ pwms = <&pwm 4 3000>;
+ reset-gpios = <&gpio2 7>;
+ solomon,com-lrremap;
+ solomon,com-invdir;
+ solomon,com-offset = <32>;
+ solomon,lookup-table = /bits/ 8 <0x3f 0x3f 0x3f 0x3f>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/display/ssd1307fb.txt b/Documentation/devicetree/bindings/display/ssd1307fb.txt
deleted file mode 100644
index 2dcb6d12d1371536..0000000000000000
--- a/Documentation/devicetree/bindings/display/ssd1307fb.txt
+++ /dev/null
@@ -1,60 +0,0 @@
-* Solomon SSD1307 Framebuffer Driver
-
-Required properties:
- - compatible: Should be "solomon,<chip>fb-<bus>". The only supported bus for
- now is i2c, and the supported chips are ssd1305, ssd1306, ssd1307 and
- ssd1309.
- - reg: Should contain address of the controller on the I2C bus. Most likely
- 0x3c or 0x3d
- - pwm: Should contain the pwm to use according to the OF device tree PWM
- specification [0]. Only required for the ssd1307.
- - solomon,height: Height in pixel of the screen driven by the controller
- - solomon,width: Width in pixel of the screen driven by the controller
- - solomon,page-offset: Offset of pages (band of 8 pixels) that the screen is
- mapped to.
-
-Optional properties:
- - reset-gpios: The GPIO used to reset the OLED display, if available. See
- Documentation/devicetree/bindings/gpio/gpio.txt for details.
- - vbat-supply: The supply for VBAT
- - solomon,segment-no-remap: Display needs normal (non-inverted) data column
- to segment mapping
- - solomon,col-offset: Offset of columns (COL/SEG) that the screen is mapped to.
- - solomon,com-seq: Display uses sequential COM pin configuration
- - solomon,com-lrremap: Display uses left-right COM pin remap
- - solomon,com-invdir: Display uses inverted COM pin scan direction
- - solomon,com-offset: Number of the COM pin wired to the first display line
- - solomon,prechargep1: Length of deselect period (phase 1) in clock cycles.
- - solomon,prechargep2: Length of precharge period (phase 2) in clock cycles.
- This needs to be the higher, the higher the capacitance
- of the OLED's pixels is
- - solomon,dclk-div: Clock divisor 1 to 16
- - solomon,dclk-frq: Clock frequency 0 to 15, higher value means higher
- frequency
- - solomon,lookup-table: 8 bit value array of current drive pulse widths for
- BANK0, and colors A, B, and C. Each value in range
- of 31 to 63 for pulse widths of 32 to 64. Color D
- is always width 64.
- - solomon,area-color-enable: Display uses color mode
- - solomon,low-power. Display runs in low power mode
-
-[0]: Documentation/devicetree/bindings/pwm/pwm.txt
-
-Examples:
-ssd1307: oled at 3c {
- compatible = "solomon,ssd1307fb-i2c";
- reg = <0x3c>;
- pwms = <&pwm 4 3000>;
- reset-gpios = <&gpio2 7>;
-};
-
-ssd1306: oled at 3c {
- compatible = "solomon,ssd1306fb-i2c";
- reg = <0x3c>;
- pwms = <&pwm 4 3000>;
- reset-gpios = <&gpio2 7>;
- solomon,com-lrremap;
- solomon,com-invdir;
- solomon,com-offset = <32>;
- solomon,lookup-table = /bits/ 8 <0x3f 0x3f 0x3f 0x3f>;
-};
--
2.25.1
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