ST,stm32mp1 DDR3/LPDDR2/LPDDR3 Controller (DDRCTRL and DDRPHYC)

--------------------
Required properties:
--------------------
- compatible	: Should be "st,stm32mp1-ddr"
- reg		: controleur (DDRCTRL) and phy (DDRPHYC) base address
- clocks	: controller clocks handle
- clock-names	: associated controller clock names
		  the "ddrphyc" clock is used to check the DDR frequency
		  at phy level according the expected value in "mem-speed" field

the next attributes are DDR parameters, they are generated by DDR tools
included in STM32 Cube tool

info attributes:
----------------
- st,mem-name	: name for DDR configuration, simple string for information
- st,mem-speed	: DDR expected speed for the setting in kHz
- st,mem-size	: DDR mem size in byte


controlleur attributes:
-----------------------
- st,ctl-reg	: controleur values depending of the DDR type
		  (DDR3/LPDDR2/LPDDR3)
	for STM32MP15x: 25 values are requested in this order
		MSTR
		MRCTRL0
		MRCTRL1
		DERATEEN
		DERATEINT
		PWRCTL
		PWRTMG
		HWLPCTL
		RFSHCTL0
		RFSHCTL3
		CRCPARCTL0
		ZQCTL0
		DFITMG0
		DFITMG1
		DFILPCFG0
		DFIUPD0
		DFIUPD1
		DFIUPD2
		DFIPHYMSTR
		ODTMAP
		DBG0
		DBG1
		DBGCMD
		POISONCFG
		PCCFG

- st,ctl-timing	: controleur values depending of frequency and timing parameter
		  of DDR
	for STM32MP15x: 12 values are requested in this order
		RFSHTMG
		DRAMTMG0
		DRAMTMG1
		DRAMTMG2
		DRAMTMG3
		DRAMTMG4
		DRAMTMG5
		DRAMTMG6
		DRAMTMG7
		DRAMTMG8
		DRAMTMG14
		ODTCFG

- st,ctl-map	: controleur values depending of address mapping
	for STM32MP15x: 9 values are requested in this order
		ADDRMAP1
		ADDRMAP2
		ADDRMAP3
		ADDRMAP4
		ADDRMAP5
		ADDRMAP6
		ADDRMAP9
		ADDRMAP10
		ADDRMAP11

- st,ctl-perf	: controleur values depending of performance and scheduling
	for STM32MP15x: 17 values are requested in this order
		SCHED
		SCHED1
		PERFHPR1
		PERFLPR1
		PERFWR1
		PCFGR_0
		PCFGW_0
		PCFGQOS0_0
		PCFGQOS1_0
		PCFGWQOS0_0
		PCFGWQOS1_0
		PCFGR_1
		PCFGW_1
		PCFGQOS0_1
		PCFGQOS1_1
		PCFGWQOS0_1
		PCFGWQOS1_1

phyc attributes:
----------------
- st,phy-reg	: phy values depending of the DDR type (DDR3/LPDDR2/LPDDR3)
	for STM32MP15x: 11 values are requested in this order
		PGCR
		ACIOCR
		DXCCR
		DSGCR
		DCR
		ODTCR
		ZQ0CR1
		DX0GCR
		DX1GCR
		DX2GCR
		DX3GCR

- st,phy-timing	: phy values depending of frequency and timing parameter of DDR
	for STM32MP15x: 10 values are requested in this order
		PTR0
		PTR1
		PTR2
		DTPR0
		DTPR1
		DTPR2
		MR0
		MR1
		MR2
		MR3

- st,phy-cal	: phy cal depending of calibration or tuning of DDR
	This parameter is optional; when it is absent the built-in PHY
	calibration is done.
	for STM32MP15x: 12 values are requested in this order
		DX0DLLCR
		DX0DQTR
		DX0DQSTR
		DX1DLLCR
		DX1DQTR
		DX1DQSTR
		DX2DLLCR
		DX2DQTR
		DX2DQSTR
		DX3DLLCR
		DX3DQTR
		DX3DQSTR

Example:

/ {
	soc {
		u-boot,dm-spl;

		ddr: ddr@0x5A003000{
			u-boot,dm-spl;
			u-boot,dm-pre-reloc;

			compatible = "st,stm32mp1-ddr";

			reg = <0x5A003000 0x550
			       0x5A004000 0x234>;

			clocks = <&rcc_clk AXIDCG>,
				 <&rcc_clk DDRC1>,
				 <&rcc_clk DDRC2>,
				 <&rcc_clk DDRPHYC>,
				 <&rcc_clk DDRCAPB>,
				 <&rcc_clk DDRPHYCAPB>;

			clock-names = "axidcg",
				      "ddrc1",
				      "ddrc2",
				      "ddrphyc",
				      "ddrcapb",
				      "ddrphycapb";

			st,mem-name = "DDR3 2x4Gb 533MHz";
			st,mem-speed = <533000>;
			st,mem-size = <0x40000000>;

			st,ctl-reg = <
				0x00040401 /*MSTR*/
				0x00000010 /*MRCTRL0*/
				0x00000000 /*MRCTRL1*/
				0x00000000 /*DERATEEN*/
				0x00800000 /*DERATEINT*/
				0x00000000 /*PWRCTL*/
				0x00400010 /*PWRTMG*/
				0x00000000 /*HWLPCTL*/
				0x00210000 /*RFSHCTL0*/
				0x00000000 /*RFSHCTL3*/
				0x00000000 /*CRCPARCTL0*/
				0xC2000040 /*ZQCTL0*/
				0x02050105 /*DFITMG0*/
				0x00000202 /*DFITMG1*/
				0x07000000 /*DFILPCFG0*/
				0xC0400003 /*DFIUPD0*/
				0x00000000 /*DFIUPD1*/
				0x00000000 /*DFIUPD2*/
				0x00000000 /*DFIPHYMSTR*/
				0x00000001 /*ODTMAP*/
				0x00000000 /*DBG0*/
				0x00000000 /*DBG1*/
				0x00000000 /*DBGCMD*/
				0x00000000 /*POISONCFG*/
				0x00000010 /*PCCFG*/
			>;

			st,ctl-timing = <
				0x0080008A /*RFSHTMG*/
				0x121B2414 /*DRAMTMG0*/
				0x000D041B /*DRAMTMG1*/
				0x0607080E /*DRAMTMG2*/
				0x0050400C /*DRAMTMG3*/
				0x07040407 /*DRAMTMG4*/
				0x06060303 /*DRAMTMG5*/
				0x02020002 /*DRAMTMG6*/
				0x00000202 /*DRAMTMG7*/
				0x00001005 /*DRAMTMG8*/
				0x000D041B /*DRAMTMG1*/4
				0x06000600 /*ODTCFG*/
			>;

			st,ctl-map = <
				0x00080808 /*ADDRMAP1*/
				0x00000000 /*ADDRMAP2*/
				0x00000000 /*ADDRMAP3*/
				0x00001F1F /*ADDRMAP4*/
				0x07070707 /*ADDRMAP5*/
				0x0F070707 /*ADDRMAP6*/
				0x00000000 /*ADDRMAP9*/
				0x00000000 /*ADDRMAP10*/
				0x00000000 /*ADDRMAP11*/
			>;

			st,ctl-perf = <
				0x00001201 /*SCHED*/
				0x00001201 /*SCHED*/1
				0x01000001 /*PERFHPR1*/
				0x08000200 /*PERFLPR1*/
				0x08000400 /*PERFWR1*/
				0x00010000 /*PCFGR_0*/
				0x00000000 /*PCFGW_0*/
				0x02100B03 /*PCFGQOS0_0*/
				0x00800100 /*PCFGQOS1_0*/
				0x01100B03 /*PCFGWQOS0_0*/
				0x01000200 /*PCFGWQOS1_0*/
				0x00010000 /*PCFGR_1*/
				0x00000000 /*PCFGW_1*/
				0x02100B03 /*PCFGQOS0_1*/
				0x00800000 /*PCFGQOS1_1*/
				0x01100B03 /*PCFGWQOS0_1*/
				0x01000200 /*PCFGWQOS1_1*/
			>;

			st,phy-reg = <
				0x01442E02 /*PGCR*/
				0x10400812 /*ACIOCR*/
				0x00000C40 /*DXCCR*/
				0xF200001F /*DSGCR*/
				0x0000000B /*DCR*/
				0x00010000 /*ODTCR*/
				0x0000007B /*ZQ0CR1*/
				0x0000CE81 /*DX0GCR*/
				0x0000CE81 /*DX1GCR*/
				0x0000CE81 /*DX2GCR*/
				0x0000CE81 /*DX3GCR*/
			>;

			st,phy-timing = <
				0x0022A41B /*PTR0*/
				0x047C0740 /*PTR1*/
				0x042D9C80 /*PTR2*/
				0x369477D0 /*DTPR0*/
				0x098A00D8 /*DTPR1*/
				0x10023600 /*DTPR2*/
				0x00000830 /*MR0*/
				0x00000000 /*MR1*/
				0x00000208 /*MR2*/
				0x00000000 /*MR3*/
			>;

			st,phy-cal = <
				0x40000000 /*DX0DLLCR*/
				0xFFFFFFFF /*DX0DQTR*/
				0x3DB02000 /*DX0DQSTR*/
				0x40000000 /*DX1DLLCR*/
				0xFFFFFFFF /*DX1DQTR*/
				0x3DB02000 /*DX1DQSTR*/
				0x40000000 /*DX2DLLCR*/
				0xFFFFFFFF /*DX2DQTR*/
				0x3DB02000 /*DX2DQSTR*/
				0x40000000 /*DX3DLLCR*/
				0xFFFFFFFF /*DX3DQTR*/
				0x3DB02000 /*DX3DQSTR*/
			>;

			status = "okay";
		};
	};
};