linux-kernel - [PATCH v2 1/4] dt-bindings: leds: Add binding for qcom-spmi-flash

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Message-ID: <20210126140240.1517044-2-nfraprado@protonmail.com>
Date:   Tue, 26 Jan 2021 14:04:08 +0000
From:   Nícolas F. R. A. Prado 
        <nfraprado@...tonmail.com>
To:     Pavel Machek <pavel@....cz>, Dan Murphy <dmurphy@...com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-leds@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        Brian Masney <masneyb@...tation.org>,
        Luca Weiss <luca@...tu.xyz>,
        Russell King <linux@...linux.org.uk>,
        Georgi Djakov <georgi.djakov@...aro.org>,
        linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        lkcamp@...ts.libreplanetbr.org, andrealmeid@...labora.com
Subject: [PATCH v2 1/4] dt-bindings: leds: Add binding for qcom-spmi-flash

Add devicetree binding for QCOM SPMI Flash LEDs, which are part of
PM8941, and are used both as lantern and camera flash.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...tonmail.com>
---
Changes in v2:
- Add this commit

 .../bindings/leds/leds-qcom-spmi-flash.yaml   | 94 +++++++++++++++++++
 .../dt-bindings/leds/leds-qcom-spmi-flash.h   | 15 +++
 2 files changed, 109 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/leds-qcom-spmi-flash.yaml
 create mode 100644 include/dt-bindings/leds/leds-qcom-spmi-flash.h

diff --git a/Documentation/devicetree/bindings/leds/leds-qcom-spmi-flash.yaml b/Documentation/devicetree/bindings/leds/leds-qcom-spmi-flash.yaml
new file mode 100644
index 000000000000..169716e14f67
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-qcom-spmi-flash.yaml
@@ -0,0 +1,94 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/leds-qcom-spmi-flash.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SPMI Flash LEDs
+
+maintainers:
+  - Nícolas F. R. A. Prado <nfraprado@...tonmail.com>
+
+description: |
+  The Qualcomm SPMI Flash LEDs are part of Qualcomm PMICs and are used primarily
+  as a camera or video flash. They can also be used as a lantern when on torch
+  mode.
+  The PMIC is connected to Host processor via SPMI bus.
+
+properties:
+  compatible:
+    const: qcom,spmi-flash
+
+  reg:
+    maxItems: 1
+
+  flash-boost-supply:
+    description: SMBB regulator for LED flash mode
+
+  torch-boost-supply:
+    description: SMBB regulator for LED torch mode
+
+patternProperties:
+  "^led[0-1]$":
+    type: object
+    $ref: common.yaml#
+
+    properties:
+      qcom,clamp-curr:
+        description: current to clamp at, in uA
+        $ref: /schemas/types.yaml#definitions/uint32
+
+      qcom,headroom:
+        description: |
+          headroom to use. Use one of QCOM_SPMI_FLASH_HEADROOM_* defined in
+          include/dt-bindings/leds/leds-qcom-spmi-flash.h
+        $ref: /schemas/types.yaml#definitions/uint32
+        minimum: 0
+        maximum: 3
+
+      qcom,startup-dly:
+        description: |
+          delay before flashing. Use one of QCOM_SPMI_FLASH_STARTUP_DLY_*
+          defined in include/dt-bindings/leds/leds-qcom-spmi-flash.h
+        $ref: /schemas/types.yaml#definitions/uint32
+        minimum: 0
+        maximum: 3
+
+      qcom,safety-timer:
+        description: include for safety timer use, otherwise watchdog timer will be used
+        type: boolean
+
+required:
+  - compatible
+  - reg
+  - flash-boost-supply
+  - torch-boost-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/leds/common.h>
+    #include <dt-bindings/leds/leds-qcom-spmi-flash.h>
+
+    qcom,leds@...0 {
+        compatible = "qcom,spmi-flash";
+        reg = <0xd300 0x100>;
+        flash-boost-supply = <&pm8941_5vs1>;
+        torch-boost-supply = <&pm8941_5v>;
+
+        led0 {
+            led-sources = <0>;
+            function = LED_FUNCTION_FLASH;
+            color = <LED_COLOR_ID_WHITE>;
+            led-max-microamp = <200000>;
+            flash-max-microamp = <1000000>;
+            flash-max-timeout-us = <1280000>;
+            default-state = "off";
+            qcom,clamp-curr = <200000>;
+            qcom,headroom = <QCOM_SPMI_FLASH_HEADROOM_500MV>;
+            qcom,startup-dly = <QCOM_SPMI_FLASH_STARTUP_DLY_128US>;
+            qcom,safety-timer;
+        };
+    };
+...
diff --git a/include/dt-bindings/leds/leds-qcom-spmi-flash.h b/include/dt-bindings/leds/leds-qcom-spmi-flash.h
new file mode 100644
index 000000000000..8bd54a8e831d
--- /dev/null
+++ b/include/dt-bindings/leds/leds-qcom-spmi-flash.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _DT_BINDINGS_LEDS_QCOM_SPMI_FLASH_H
+#define _DT_BINDINGS_LEDS_QCOM_SPMI_FLASH_H
+
+#define QCOM_SPMI_FLASH_HEADROOM_250MV	0
+#define QCOM_SPMI_FLASH_HEADROOM_300MV	1
+#define QCOM_SPMI_FLASH_HEADROOM_400MV	2
+#define QCOM_SPMI_FLASH_HEADROOM_500MV	3
+
+#define QCOM_SPMI_FLASH_STARTUP_DLY_10US	0
+#define QCOM_SPMI_FLASH_STARTUP_DLY_32US	1
+#define QCOM_SPMI_FLASH_STARTUP_DLY_64US	2
+#define QCOM_SPMI_FLASH_STARTUP_DLY_128US	3
+
+#endif
-- 
2.30.0