clk: mmp: add mmp2 DT support for clock driver

It adds the DT support for mmp2 clock subsystem.
Signed-off-by: Chao Xie <chao.xie@marvell.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>

Documentation/devicetree/bindings/clock/marvell,mmp2.txt

+* Marvell MMP2 Clock Controller
+
+The MMP2 clock subsystem generates and supplies clock to various
+controllers within the MMP2 SoC.
+
+Required Properties:
+
+- compatible: should be one of the following.
+  - "marvell,mmp2-clock" - controller compatible with MMP2 SoC.
+
+- reg: physical base address of the clock subsystem and length of memory mapped
+  region. There are 3 places in SOC has clock control logic:
+  "mpmu", "apmu", "apbc". So three reg spaces need to be defined.
+
+- #clock-cells: should be 1.
+- #reset-cells: should be 1.
+
+Each clock is assigned an identifier and client nodes use this identifier
+to specify the clock which they consume.
+
+All these identifier could be found in <dt-bindings/clock/marvell-mmp2.h>.

drivers/clk/mmp/Makefile

@@ -7,6 +7,7 @@ obj-y += clk-apbc.o clk-apmu.o clk-frac.o clk-mix.o clk-gate.o clk.o
 obj-$(CONFIG_RESET_CONTROLLER) += reset.o
 
 obj-$(CONFIG_MACH_MMP_DT) += clk-of-pxa168.o clk-of-pxa910.o
+obj-$(CONFIG_MACH_MMP2_DT) += clk-of-mmp2.o
 
 obj-$(CONFIG_CPU_PXA168) += clk-pxa168.o
 obj-$(CONFIG_CPU_PXA910) += clk-pxa910.o

include/dt-bindings/clock/marvell,mmp2.h

+#ifndef __DTS_MARVELL_MMP2_CLOCK_H
+#define __DTS_MARVELL_MMP2_CLOCK_H
+
+/* fixed clocks and plls */
+#define MMP2_CLK_CLK32			1
+#define MMP2_CLK_VCTCXO			2
+#define MMP2_CLK_PLL1			3
+#define MMP2_CLK_PLL1_2			8
+#define MMP2_CLK_PLL1_4			9
+#define MMP2_CLK_PLL1_8			10
+#define MMP2_CLK_PLL1_16		11
+#define MMP2_CLK_PLL1_3			12
+#define MMP2_CLK_PLL1_6			13
+#define MMP2_CLK_PLL1_12		14
+#define MMP2_CLK_PLL1_20		15
+#define MMP2_CLK_PLL2			16
+#define MMP2_CLK_PLL2_2			17
+#define MMP2_CLK_PLL2_4			18
+#define MMP2_CLK_PLL2_8			19
+#define MMP2_CLK_PLL2_16		20
+#define MMP2_CLK_PLL2_3			21
+#define MMP2_CLK_PLL2_6			22
+#define MMP2_CLK_PLL2_12		23
+#define MMP2_CLK_VCTCXO_2		24
+#define MMP2_CLK_VCTCXO_4		25
+#define MMP2_CLK_UART_PLL		26
+#define MMP2_CLK_USB_PLL		27
+
+/* apb periphrals */
+#define MMP2_CLK_TWSI0			60
+#define MMP2_CLK_TWSI1			61
+#define MMP2_CLK_TWSI2			62
+#define MMP2_CLK_TWSI3			63
+#define MMP2_CLK_TWSI4			64
+#define MMP2_CLK_TWSI5			65
+#define MMP2_CLK_GPIO			66
+#define MMP2_CLK_KPC			67
+#define MMP2_CLK_RTC			68
+#define MMP2_CLK_PWM0			69
+#define MMP2_CLK_PWM1			70
+#define MMP2_CLK_PWM2			71
+#define MMP2_CLK_PWM3			72
+#define MMP2_CLK_UART0			73
+#define MMP2_CLK_UART1			74
+#define MMP2_CLK_UART2			75
+#define MMP2_CLK_UART3			76
+#define MMP2_CLK_SSP0			77
+#define MMP2_CLK_SSP1			78
+#define MMP2_CLK_SSP2			79
+#define MMP2_CLK_SSP3			80
+
+/* axi periphrals */
+#define MMP2_CLK_SDH0			101
+#define MMP2_CLK_SDH1			102
+#define MMP2_CLK_SDH2			103
+#define MMP2_CLK_SDH3			104
+#define MMP2_CLK_USB			105
+#define MMP2_CLK_DISP0			106
+#define MMP2_CLK_DISP0_MUX		107
+#define MMP2_CLK_DISP0_SPHY		108
+#define MMP2_CLK_DISP1			109
+#define MMP2_CLK_DISP1_MUX		110
+#define MMP2_CLK_CCIC_ARBITER		111
+#define MMP2_CLK_CCIC0			112
+#define MMP2_CLK_CCIC0_MIX		113
+#define MMP2_CLK_CCIC0_PHY		114
+#define MMP2_CLK_CCIC0_SPHY		115
+#define MMP2_CLK_CCIC1			116
+#define MMP2_CLK_CCIC1_MIX		117
+#define MMP2_CLK_CCIC1_PHY		118
+#define MMP2_CLK_CCIC1_SPHY		119
+
+#define MMP2_NR_CLKS			200
+#endif