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From: cy_huang <u0084500@gmail.com>
To: lee.jones@linaro.org, lgirdwood@gmail.com, broonie@kernel.org,
	daniel.thompson@linaro.org, jingoohan1@gmail.com,
	b.zolnierkie@samsung.com, pavel@ucw.cz, robh+dt@kernel.org
Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org,
	devicetree@vger.kernel.org, cy_huang@richtek.com
Subject: [PATCH v7 2/4] backlight: rt4831: Adds DT binding document for Richtek RT4831 backlight
Date: Mon, 17 May 2021 22:35:59 +0800	[thread overview]
Message-ID: <1621262161-9972-2-git-send-email-u0084500@gmail.com> (raw)
In-Reply-To: <1621262161-9972-1-git-send-email-u0084500@gmail.com>

From: ChiYuan Huang <cy_huang@richtek.com>

Adds DT binding document for Richtek RT4831 backlight.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
---
since v7
- Add allOf property refer to common.yaml.
- Remove default-brightness/max-brightness description and refer string.
---
 .../leds/backlight/richtek,rt4831-backlight.yaml   | 62 ++++++++++++++++++++++
 include/dt-bindings/leds/rt4831-backlight.h        | 23 ++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml
 create mode 100644 include/dt-bindings/leds/rt4831-backlight.h

diff --git a/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml
new file mode 100644
index 00000000..e0ac686
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Richtek RT4831 Backlight
+
+maintainers:
+  - ChiYuan Huang <cy_huang@richtek.com>
+
+description: |
+  RT4831 is a mutifunctional device that can provide power to the LCD display
+  and LCD backlight.
+
+  For the LCD backlight, it can provide four channel WLED driving capability.
+  Each channel driving current is up to 30mA
+
+  Datasheet is available at
+  https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf
+
+allOf:
+  - $ref: common.yaml#
+
+properties:
+  compatible:
+    const: richtek,rt4831-backlight
+
+  default-brightness:
+    minimum: 0
+    maximum: 2048
+
+  max-brightness:
+    minimum: 0
+    maximum: 2048
+
+  richtek,pwm-enable:
+    description: |
+      Specify the backlight dimming following by PWM duty or by SW control.
+    type: boolean
+
+  richtek,bled-ovp-sel:
+    description: |
+      Backlight OVP level selection, currently support 17V/21V/25V/29V.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    default: 1
+    minimum: 0
+    maximum: 3
+
+  richtek,channel-use:
+    description: |
+      Backlight LED channel to be used.
+      BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    minimum: 1
+    maximum: 15
+
+required:
+  - compatible
+  - richtek,channel-use
+
+additionalProperties: false
diff --git a/include/dt-bindings/leds/rt4831-backlight.h b/include/dt-bindings/leds/rt4831-backlight.h
new file mode 100644
index 00000000..125c635
--- /dev/null
+++ b/include/dt-bindings/leds/rt4831-backlight.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * This header provides constants for rt4831 backlight bindings.
+ *
+ * Copyright (C) 2020, Richtek Technology Corp.
+ * Author: ChiYuan Huang <cy_huang@richtek.com>
+ */
+
+#ifndef _DT_BINDINGS_RT4831_BACKLIGHT_H
+#define _DT_BINDINGS_RT4831_BACKLIGHT_H
+
+#define RT4831_BLOVPLVL_17V	0
+#define RT4831_BLOVPLVL_21V	1
+#define RT4831_BLOVPLVL_25V	2
+#define RT4831_BLOVPLVL_29V	3
+
+#define RT4831_BLED_CH1EN	(1 << 0)
+#define RT4831_BLED_CH2EN	(1 << 1)
+#define RT4831_BLED_CH3EN	(1 << 2)
+#define RT4831_BLED_CH4EN	(1 << 3)
+#define RT4831_BLED_ALLCHEN	((1 << 4) - 1)
+
+#endif /* _DT_BINDINGS_RT4831_BACKLIGHT_H */
-- 
2.7.4


  reply	other threads:[~2021-05-17 15:46 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-17 14:35 [PATCH v7 1/4] mfd: rt4831: Adds support for Richtek RT4831 cy_huang
2021-05-17 14:35 ` cy_huang [this message]
2021-05-19 14:50   ` [PATCH v7 2/4] backlight: rt4831: Adds DT binding document for Richtek RT4831 backlight Lee Jones
2021-05-17 14:36 ` [PATCH v7 3/4] mfd: rt4831: Adds DT binding document for Richtek RT4831 cy_huang
2021-05-19 14:50   ` Lee Jones
2021-05-17 14:36 ` [PATCH v7 4/4] backlight: rt4831: Adds support for Richtek RT4831 backlight cy_huang
2021-05-19 14:51   ` Lee Jones
2021-05-19 14:50 ` [PATCH v7 1/4] mfd: rt4831: Adds support for Richtek RT4831 Lee Jones
  -- strict thread matches above, loose matches on Subject: below --
2021-05-12 15:21 cy_huang
2021-05-12 15:21 ` [PATCH v7 2/4] backlight: rt4831: Adds DT binding document for Richtek RT4831 backlight cy_huang

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