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Rockchip Dynamic Memory Controller Driver
Required properties:
- compatible: "rockchip,rk3288-dmc", "syscon"
- rockchip,cru: this driver should access cru regs, so need get cru here
- rockchip,grf: this driver should access grf regs, so need get grf here
- rockchip,pmu: this driver should access pmu regs, so need get pmu here
- rockchip,sgrf: this driver should access sgrf regs, so need get sgrf here
- rockchip,noc: this driver should access noc regs, so need get noc here
- reg: dynamic ram protocol controller(PCTL) address and phy controller(PHYCTL) address
- clock: must include clock specifiers corresponding to entries in the clock-names property.
- clock-output-names: from common clock binding to override the default output clock name
Must contain
pclk_ddrupctl0: support clock for access protocol controller registers of channel 0
pclk_publ0: support clock for access phy controller registers of channel 0
pclk_ddrupctl1: support clock for access protocol controller registers of channel 1
pclk_publ1: support clock for access phy controller registers of channel 1
arm_clk: for get arm frequency
-logic-supply: this driver should adjust VDD_LOGIC according to dmc frequency, so need get logic-supply here
-timings:
Must contain
rockchip,odt-disable-freq: if ddr clock frequency low than odt-disable-freq,this driver should disable DDR ODT
rockchip,dll-disable-freq: if ddr clock frequency low than dll-disable-freq,this driver should disable DDR DLL
rockchip,sr-enable-freq: if ddr clock frequency high than sr-enable-freq,this driver should enable the automatic self refresh function
rockchip,pd-enable-freq: if ddr clock frequency high than pd-enable-freq,this driver should enable the automatic power down function
rockchip,auto-self-refresh-cnt: Self Refresh idle period. Memories are placed into Self-Refresh mode if the NIF is idle in Access state for auto-self-refresh-cnt * 32 * n_clk cycles.The automatic self refresh function is disabled when auto-self-refresh-cnt=0.
rockchip,auto-power-down-cnt: Power-down idle period. Memories are placed into power-down mode if the NIF is idle for auto-power-down-cnt n_clk cycles.The automatic power down function is disabled when auto-power-down-cnt=0.
rockchip,ddr-speed-bin: DDR3 type,AC timing parameters from the memory data-sheet
0.DDR3_800D (5-5-5)
1.DDR3_800E (6-6-6)
2.DDR3_1066E (6-6-6)
3.DDR3_1066F (7-7-7)
4.DDR3_1066G (8-8-8)
5.DDR3_1333F (7-7-7)
6.DDR3_1333G (8-8-8)
7.DDR3_1333H (9-9-9)
8.DDR3_1333J (10-10-10)
9.DDR3_1600G (8-8-8)
10.DDR3_1600H (9-9-9)
11.DDR3_1600J (10-10-10)
12.DDR3_1600K (11-11-11)
13.DDR3_1866J (10-10-10)
14.DDR3_1866K (11-11-11)
15.DDR3_1866L (12-12-12)
16.DDR3_1866M (13-13-13)
17.DDR3_2133K (11-11-11)
18.DDR3_2133L (12-12-12)
19.DDR3_2133M (13-13-13)
20.DDR3_2133N (14-14-14)
21.DDR3_DEFAULT
rockchip,trcd: tRCD,AC timing parameters from the memory data-sheet
rockchip,trp: tRP,AC timing parameters from the memory data-sheet
-rockchip,num-channels: number of SDRAM channels (1 or 2)
-rockchip,pctl-timing: parameters for the SDRAM setup, in this order:
togcnt1u
tinit
trsth
togcnt100n
trefi
tmrd
trfc
trp
trtw
tal
tcl
tcwl
tras
trc
trcd
trrd
trtp
twr
twtr
texsr
txp
txpdll
tzqcs
tzqcsi
tdqs
tcksre
tcksrx
tcke
tmod
trstl
tzqcl
tmrr
tckesr
tdpd
-rockchip,phy-timing: PHY timing information in this order:
dtpr0
dtpr1
dtpr2
mr0..mr3
-rockchip,sdram-channel: SDRAM channel information, each 8 bits. Both channels
will be set up the same. The parameters are in this order:
rank
col
bk
bw
dbw
row_3_4
cs0_row
cs1_row
- rockchip,sdram-params: SDRAM base parameters, in this order:
NOC timing - value for ddrtiming register
NOC activate - value for activate register
ddrconf - value for ddrconf register
DDR frequency in MHz
DRAM type (3=DDR3, 6=LPDDR3)
stride - stride value for soc_con2 register
odt - 1 to enable DDR ODT, 0 to disable
Example:
dmc: dmc@ff610000 {
compatible = "rockchip,rk3288-dmc", "syscon";
rockchip,cru = <&cru>;
rockchip,grf = <&grf>;
rockchip,pmu = <&pmu>;
rockchip,sgrf = <&sgrf>;
rockchip,noc = <&noc>;
reg = <0xff610000 0x3fc
0xff620000 0x294
0xff630000 0x3fc
0xff640000 0x294>;
clocks = <&cru PCLK_DDRUPCTL0>, <&cru PCLK_PUBL0>,
<&cru PCLK_DDRUPCTL1>, <&cru PCLK_PUBL1>,
<&cru ARMCLK>;
clock-names = "pclk_ddrupctl0", "pclk_publ0",
"pclk_ddrupctl1", "pclk_publ1",
"arm_clk";
};
&dmc {
logic-supply = <&vdd_logic>;
timings {
rockchip,odt-disable-freq = <333000000>;
rockchip,dll-disable-freq = <333000000>;
rockchip,sr-enable-freq = <333000000>;
rockchip,pd-enable-freq = <666000000>;
rockchip,auto-self-refresh-cnt = <0>;
rockchip,auto-power-down-cnt = <64>;
rockchip,ddr-speed-bin = <21>;
rockchip,trcd = <10>;
rockchip,trp = <10>;
};
rockchip,num-channels = <2>;
rockchip,pctl-timing = <0x29a 0x1f4 0xc8 0x42 0x4e 0x4 0xea 0xa
0x5 0x0 0xa 0x7 0x19 0x24 0xa 0x7
0x5 0xa 0x5 0x200 0x5 0x10 0x40 0x0
0x1 0x7 0x7 0x4 0xc 0x43 0x100 0x0
0x5 0x0>;
rockchip,phy-timing = <0x48f9aab4 0xea0910 0x1002c200
0xa60 0x40 0x10 0x0>;
rockchip,sdram-channel = /bits/ 8 <0x1 0xa 0x3 0x2 0x1 0x0 0xf 0xf>;
rockchip,sdram-params = <0x30B25564 0x627 3 666000000 3 9 1>;
};
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