dt-bindings: clock: Add X1000 bindings.

Add the clock bindings for the X1000 Soc from Ingenic.

Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
Link: https://lkml.kernel.org/r/1573378102-72380-2-git-send-email-zhouyanjie@zoho.com
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/ingenic,cgu.txt

@@ -11,6 +11,7 @@ Required properties:
   * ingenic,jz4725b-cgu
   * ingenic,jz4770-cgu
   * ingenic,jz4780-cgu
+  * ingenic,x1000-cgu
 - reg : The address & length of the CGU registers.
 - clocks : List of phandle & clock specifiers for clocks external to the CGU.
   Two such external clocks should be specified - first the external crystal

include/dt-bindings/clock/x1000-cgu.h

@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This header provides clock numbers for the ingenic,x1000-cgu DT binding.
+ *
+ * They are roughly ordered as:
+ *   - external clocks
+ *   - PLLs
+ *   - muxes/dividers in the order they appear in the x1000 programmers manual
+ *   - gates in order of their bit in the CLKGR* registers
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_X1000_CGU_H__
+#define __DT_BINDINGS_CLOCK_X1000_CGU_H__
+
+#define X1000_CLK_EXCLK		0
+#define X1000_CLK_RTCLK		1
+#define X1000_CLK_APLL		2
+#define X1000_CLK_MPLL		3
+#define X1000_CLK_SCLKA		4
+#define X1000_CLK_CPUMUX	5
+#define X1000_CLK_CPU		6
+#define X1000_CLK_L2CACHE	7
+#define X1000_CLK_AHB0		8
+#define X1000_CLK_AHB2PMUX	9
+#define X1000_CLK_AHB2		10
+#define X1000_CLK_PCLK		11
+#define X1000_CLK_DDR		12
+#define X1000_CLK_MAC		13
+#define X1000_CLK_MSCMUX	14
+#define X1000_CLK_MSC0		15
+#define X1000_CLK_MSC1		16
+#define X1000_CLK_SSIPLL	17
+#define X1000_CLK_SSIMUX	18
+#define X1000_CLK_SFC		19
+#define X1000_CLK_I2C0		20
+#define X1000_CLK_I2C1		21
+#define X1000_CLK_I2C2		22
+#define X1000_CLK_UART0		23
+#define X1000_CLK_UART1		24
+#define X1000_CLK_UART2		25
+#define X1000_CLK_SSI		26
+#define X1000_CLK_PDMA		27
+
+#endif /* __DT_BINDINGS_CLOCK_X1000_CGU_H__ */