[PATCH v4 3/6] dt-bindings: clock: Add Nuvoton WPCM450 clock/reset controller

["Jonathan Neuschäfer" <j.neuschaefer@gmx.net>]

The Nuvoton WPCM450 SoC has a combined clock and reset controller.
Add a devicetree binding for it, as well as definitions for the bit
numbers used by it.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---

v4:
- Add R-b tag

v3:
- Change clock-output-names and clock-names from "refclk" to "ref", suggested
  by Krzysztof Kozlowski

v2:
- https://lore.kernel.org/lkml/20220429172030.398011-5-j.neuschaefer@gmx.net/
- Various improvements, suggested by Krzysztof Kozlowski

v1:
- https://lore.kernel.org/lkml/20220422183012.444674-5-j.neuschaefer@gmx.net/
---
 .../bindings/clock/nuvoton,wpcm450-clk.yaml   | 66 ++++++++++++++++++
 .../dt-bindings/clock/nuvoton,wpcm450-clk.h   | 67 +++++++++++++++++++
 2 files changed, 133 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/nuvoton,wpcm450-clk.yaml
 create mode 100644 include/dt-bindings/clock/nuvoton,wpcm450-clk.h

diff --git a/Documentation/devicetree/bindings/clock/nuvoton,wpcm450-clk.yaml b/Documentation/devicetree/bindings/clock/nuvoton,wpcm450-clk.yaml
new file mode 100644
index 0000000000000..525024a58df4c
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/nuvoton,wpcm450-clk.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/nuvoton,wpcm450-clk.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton WPCM450 clock controller
+
+maintainers:
+  - Jonathan Neuschäfer <j.neuschaefer@gmx.net>
+
+description:
+  The clock controller of the Nuvoton WPCM450 SoC supplies clocks and resets to
+  the rest of the chip.
+
+properties:
+  compatible:
+    const: nuvoton,wpcm450-clk
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Reference clock oscillator (should be 48 MHz)
+
+  clock-names:
+    items:
+      - const: ref
+
+  '#clock-cells':
+    const: 1
+
+  '#reset-cells':
+    const: 1
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - '#clock-cells'
+
+examples:
+  - |
+    #include <dt-bindings/clock/nuvoton,wpcm450-clk.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    refclk: clock-48mhz {
+      /* 48 MHz reference oscillator */
+      compatible = "fixed-clock";
+      clock-output-names = "ref";
+      clock-frequency = <48000000>;
+      #clock-cells = <0>;
+    };
+
+    clk: clock-controller@b0000200 {
+      reg = <0xb0000200 0x100>;
+      compatible = "nuvoton,wpcm450-clk";
+      clocks = <&refclk>;
+      clock-names = "ref";
+      #clock-cells = <1>;
+      #reset-cells = <1>;
+    };
diff --git a/include/dt-bindings/clock/nuvoton,wpcm450-clk.h b/include/dt-bindings/clock/nuvoton,wpcm450-clk.h
new file mode 100644
index 0000000000000..86e1c895921b7
--- /dev/null
+++ b/include/dt-bindings/clock/nuvoton,wpcm450-clk.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+
+#ifndef _DT_BINDINGS_CLOCK_NUVOTON_WPCM450_CLK_H
+#define _DT_BINDINGS_CLOCK_NUVOTON_WPCM450_CLK_H
+
+/* Clocks based on CLKEN bits */
+#define WPCM450_CLK_FIU            0
+#define WPCM450_CLK_XBUS           1
+#define WPCM450_CLK_KCS            2
+#define WPCM450_CLK_SHM            4
+#define WPCM450_CLK_USB1           5
+#define WPCM450_CLK_EMC0           6
+#define WPCM450_CLK_EMC1           7
+#define WPCM450_CLK_USB0           8
+#define WPCM450_CLK_PECI           9
+#define WPCM450_CLK_AES           10
+#define WPCM450_CLK_UART0         11
+#define WPCM450_CLK_UART1         12
+#define WPCM450_CLK_SMB2          13
+#define WPCM450_CLK_SMB3          14
+#define WPCM450_CLK_SMB4          15
+#define WPCM450_CLK_SMB5          16
+#define WPCM450_CLK_HUART         17
+#define WPCM450_CLK_PWM           18
+#define WPCM450_CLK_TIMER0        19
+#define WPCM450_CLK_TIMER1        20
+#define WPCM450_CLK_TIMER2        21
+#define WPCM450_CLK_TIMER3        22
+#define WPCM450_CLK_TIMER4        23
+#define WPCM450_CLK_MFT0          24
+#define WPCM450_CLK_MFT1          25
+#define WPCM450_CLK_WDT           26
+#define WPCM450_CLK_ADC           27
+#define WPCM450_CLK_SDIO          28
+#define WPCM450_CLK_SSPI          29
+#define WPCM450_CLK_SMB0          30
+#define WPCM450_CLK_SMB1          31
+
+/* Other clocks */
+#define WPCM450_CLK_USBPHY        32
+
+#define WPCM450_NUM_CLKS          33
+
+/* Resets based on IPSRST bits */
+#define WPCM450_RESET_FIU          0
+#define WPCM450_RESET_EMC0         6
+#define WPCM450_RESET_EMC1         7
+#define WPCM450_RESET_USB0         8
+#define WPCM450_RESET_USB1         9
+#define WPCM450_RESET_AES_PECI    10
+#define WPCM450_RESET_UART        11
+#define WPCM450_RESET_MC          12
+#define WPCM450_RESET_SMB2        13
+#define WPCM450_RESET_SMB3        14
+#define WPCM450_RESET_SMB4        15
+#define WPCM450_RESET_SMB5        16
+#define WPCM450_RESET_PWM         18
+#define WPCM450_RESET_TIMER       19
+#define WPCM450_RESET_ADC         27
+#define WPCM450_RESET_SDIO        28
+#define WPCM450_RESET_SSPI        29
+#define WPCM450_RESET_SMB0        30
+#define WPCM450_RESET_SMB1        31
+
+#define WPCM450_NUM_RESETS        32
+
+#endif /* _DT_BINDINGS_CLOCK_NUVOTON_WPCM450_CLK_H */
--
2.35.1