linux-kernel - [PATCH v1 5/6] dt-bindings: clock: meson: add A1 CPU clock controller bindings

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Message-ID: <20240329205904.25002-6-ddrokosov@salutedevices.com>
Date: Fri, 29 Mar 2024 23:58:45 +0300
From: Dmitry Rokosov <ddrokosov@...utedevices.com>
To: <neil.armstrong@...aro.org>, <jbrunet@...libre.com>,
	<mturquette@...libre.com>, <sboyd@...nel.org>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <khilman@...libre.com>,
	<martin.blumenstingl@...glemail.com>
CC: <kernel@...utedevices.com>, <rockosov@...il.com>,
	<linux-amlogic@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, Dmitry Rokosov
	<ddrokosov@...utedevices.com>
Subject: [PATCH v1 5/6] dt-bindings: clock: meson: add A1 CPU clock controller bindings

Add the documentation and dt bindings for Amlogic A1 CPU clock
controller.

This controller consists of the general 'cpu_clk' and two main parents:
'cpu fixed clock' and 'syspll'. The 'cpu fixed clock' is an internal
fixed clock, while the 'syspll' serves as an external input from the A1
PLL clock controller.

Signed-off-by: Dmitry Rokosov <ddrokosov@...utedevices.com>
---
 .../bindings/clock/amlogic,a1-cpu-clkc.yaml   | 64 +++++++++++++++++++
 .../dt-bindings/clock/amlogic,a1-cpu-clkc.h   | 19 ++++++
 2 files changed, 83 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/amlogic,a1-cpu-clkc.yaml
 create mode 100644 include/dt-bindings/clock/amlogic,a1-cpu-clkc.h

diff --git a/Documentation/devicetree/bindings/clock/amlogic,a1-cpu-clkc.yaml b/Documentation/devicetree/bindings/clock/amlogic,a1-cpu-clkc.yaml
new file mode 100644
index 000000000000..d52d2e084ae7
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/amlogic,a1-cpu-clkc.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/amlogic,a1-cpu-clkc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic A1 CPU Clock Control Unit
+
+maintainers:
+  - Neil Armstrong <neil.armstrong@...aro.org>
+  - Jerome Brunet <jbrunet@...libre.com>
+  - Dmitry Rokosov <ddrokosov@...utedevices.com>
+
+properties:
+  compatible:
+    const: amlogic,a1-cpu-clkc
+
+  '#clock-cells':
+    const: 1
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: input fixed pll div2
+      - description: input fixed pll div3
+      - description: input sys pll
+      - description: input oscillator (usually at 24MHz)
+
+  clock-names:
+    items:
+      - const: fclk_div2
+      - const: fclk_div3
+      - const: sys_pll
+      - const: xtal
+
+required:
+  - compatible
+  - '#clock-cells'
+  - reg
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/amlogic,a1-pll-clkc.h>
+    apb {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        clock-controller@...00000 {
+            compatible = "amlogic,a1-cpu-clkc";
+            reg = <0 0xfd000000 0 0x88>;
+            #clock-cells = <1>;
+            clocks = <&clkc_pll CLKID_FCLK_DIV2>,
+                     <&clkc_pll CLKID_FCLK_DIV3>,
+                     <&clkc_pll CLKID_SYS_PLL>,
+                     <&xtal>;
+            clock-names = "fclk_div2", "fclk_div3", "sys_pll", "xtal";
+        };
+    };
diff --git a/include/dt-bindings/clock/amlogic,a1-cpu-clkc.h b/include/dt-bindings/clock/amlogic,a1-cpu-clkc.h
new file mode 100644
index 000000000000..1d321c6eddb7
--- /dev/null
+++ b/include/dt-bindings/clock/amlogic,a1-cpu-clkc.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
+/*
+ * Copyright (c) 2024, SaluteDevices. All Rights Reserved.
+ * Author: Dmitry Rokosov <ddrokosov@...utedevices.com>
+ */
+
+#ifndef __A1_CPU_CLKC_H
+#define __A1_CPU_CLKC_H
+
+#define CLKID_CPU_FSOURCE_SEL0	0
+#define CLKID_CPU_FSOURCE_DIV0	1
+#define CLKID_CPU_FSEL0		2
+#define CLKID_CPU_FSOURCE_SEL1	3
+#define CLKID_CPU_FSOURCE_DIV1	4
+#define CLKID_CPU_FSEL1		5
+#define CLKID_CPU_FCLK		6
+#define CLKID_CPU_CLK		7
+
+#endif /* __A1_CPU_CLKC_H */
-- 
2.43.0