dt-bindings: clock: Add devicetree binding for BM1880 SoC

Add YAML devicetree binding for Bitmain BM1880 SoC.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lkml.kernel.org/r/20191115162901.17456-4-manivannan.sadhasivam@linaro.orgSigned-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/bitmain,bm1880-clk.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bindings/clock/bitmain,bm1880-clk.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bitmain BM1880 Clock Controller
+
+maintainers:
+  - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+
+description: |
+  The Bitmain BM1880 clock controller generates and supplies clock to
+  various peripherals within the SoC.
+
+  This binding uses common clock bindings
+  [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+properties:
+  compatible:
+    const: bitmain,bm1880-clk
+
+  reg:
+    items:
+      - description: pll registers
+      - description: system registers
+
+  reg-names:
+    items:
+      - const: pll
+      - const: sys
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: osc
+
+  '#clock-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - clocks
+  - clock-names
+  - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+  # Clock controller node:
+  - |
+    clk: clock-controller@e8 {
+        compatible = "bitmain,bm1880-clk";
+        reg = <0xe8 0x0c>, <0x800 0xb0>;
+        reg-names = "pll", "sys";
+        clocks = <&osc>;
+        clock-names = "osc";
+        #clock-cells = <1>;
+    };
+
+  # Example UART controller node that consumes clock generated by the clock controller:
+  - |
+    uart0: serial@58018000 {
+         compatible = "snps,dw-apb-uart";
+         reg = <0x0 0x58018000 0x0 0x2000>;
+         clocks = <&clk 45>, <&clk 46>;
+         clock-names = "baudclk", "apb_pclk";
+         interrupts = <0 9 4>;
+         reg-shift = <2>;
+         reg-io-width = <4>;
+    };
+
+...

include/dt-bindings/clock/bm1880-clock.h

+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Device Tree binding constants for Bitmain BM1880 SoC
+ *
+ * Copyright (c) 2019 Linaro Ltd.
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_BM1880_H
+#define __DT_BINDINGS_CLOCK_BM1880_H
+
+#define BM1880_CLK_OSC			0
+#define BM1880_CLK_MPLL			1
+#define BM1880_CLK_SPLL			2
+#define BM1880_CLK_FPLL			3
+#define BM1880_CLK_DDRPLL		4
+#define BM1880_CLK_A53			5
+#define BM1880_CLK_50M_A53		6
+#define BM1880_CLK_AHB_ROM		7
+#define BM1880_CLK_AXI_SRAM		8
+#define BM1880_CLK_DDR_AXI		9
+#define BM1880_CLK_EFUSE		10
+#define BM1880_CLK_APB_EFUSE		11
+#define BM1880_CLK_AXI5_EMMC		12
+#define BM1880_CLK_EMMC			13
+#define BM1880_CLK_100K_EMMC		14
+#define BM1880_CLK_AXI5_SD		15
+#define BM1880_CLK_SD			16
+#define BM1880_CLK_100K_SD		17
+#define BM1880_CLK_500M_ETH0		18
+#define BM1880_CLK_AXI4_ETH0		19
+#define BM1880_CLK_500M_ETH1		20
+#define BM1880_CLK_AXI4_ETH1		21
+#define BM1880_CLK_AXI1_GDMA		22
+#define BM1880_CLK_APB_GPIO		23
+#define BM1880_CLK_APB_GPIO_INTR	24
+#define BM1880_CLK_GPIO_DB		25
+#define BM1880_CLK_AXI1_MINER		26
+#define BM1880_CLK_AHB_SF		27
+#define BM1880_CLK_SDMA_AXI		28
+#define BM1880_CLK_SDMA_AUD		29
+#define BM1880_CLK_APB_I2C		30
+#define BM1880_CLK_APB_WDT		31
+#define BM1880_CLK_APB_JPEG		32
+#define BM1880_CLK_JPEG_AXI		33
+#define BM1880_CLK_AXI5_NF		34
+#define BM1880_CLK_APB_NF		35
+#define BM1880_CLK_NF			36
+#define BM1880_CLK_APB_PWM		37
+#define BM1880_CLK_DIV_0_RV		38
+#define BM1880_CLK_DIV_1_RV		39
+#define BM1880_CLK_MUX_RV		40
+#define BM1880_CLK_RV			41
+#define BM1880_CLK_APB_SPI		42
+#define BM1880_CLK_TPU_AXI		43
+#define BM1880_CLK_DIV_UART_500M	44
+#define BM1880_CLK_UART_500M		45
+#define BM1880_CLK_APB_UART		46
+#define BM1880_CLK_APB_I2S		47
+#define BM1880_CLK_AXI4_USB		48
+#define BM1880_CLK_APB_USB		49
+#define BM1880_CLK_125M_USB		50
+#define BM1880_CLK_33K_USB		51
+#define BM1880_CLK_DIV_12M_USB		52
+#define BM1880_CLK_12M_USB		53
+#define BM1880_CLK_APB_VIDEO		54
+#define BM1880_CLK_VIDEO_AXI		55
+#define BM1880_CLK_VPP_AXI		56
+#define BM1880_CLK_APB_VPP		57
+#define BM1880_CLK_DIV_0_AXI1		58
+#define BM1880_CLK_DIV_1_AXI1		59
+#define BM1880_CLK_AXI1			60
+#define BM1880_CLK_AXI2			61
+#define BM1880_CLK_AXI3			62
+#define BM1880_CLK_AXI4			63
+#define BM1880_CLK_AXI5			64
+#define BM1880_CLK_DIV_0_AXI6		65
+#define BM1880_CLK_DIV_1_AXI6		66
+#define BM1880_CLK_MUX_AXI6		67
+#define BM1880_CLK_AXI6			68
+#define BM1880_NR_CLKS			69
+
+#endif /* __DT_BINDINGS_CLOCK_BM1880_H */