| Message ID | 1472769085-20715-4-git-send-email-hl@rock-chips.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 2016년 09월 02일 07:31, Lin Huang wrote: > This patch adds the documentation for rockchip rk3399 dmc driver. > > Signed-off-by: Lin Huang <hl@rock-chips.com> > --- > Changes in v8: > - add ddr timing properties > > Changes in v7: > -None > > Changes in v6: > -Add more detail in Documentation > > Changes in v5: > -None > > Changes in v4: > -None > > Changes in v3: > -None > > Changes in v2: > -None > > Changes in v1: > -None > > .../devicetree/bindings/devfreq/rk3399_dmc.txt | 173 +++++++++++++++++++++ > 1 file changed, 173 insertions(+) > create mode 100644 Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt > > diff --git a/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt > new file mode 100644 > index 0000000..1f39b5cb > --- /dev/null > +++ b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt > @@ -0,0 +1,173 @@ > +* Rockchip rk3399 DMC(Dynamic Memory Controller) device > + > +Required properties: > +- compatible: Must be "rockchip,rk3399-dmc". > +- devfreq-events: Node to get DDR loading, Refer to > + Documentation/devicetree/bindings/devfreq/ > + rockchip-dfi.txt > +- interrupts: The interrupt number to the CPU. The interrupt > + specifier format depends on the interrupt controller. > + It should be DCF interrupts, when DDR dvfs finish, > + it will happen. > +- clocks: Phandles for clock specified in "clock-names" property > +- clock-names : The name of clock used by the DFI, must be > + "pclk_ddr_mon"; > +- operating-points-v2: Refer to Documentation/devicetree/bindings/power/opp.txt > + for details. > +- center-supply: DMC supply node. > +- status: Marks the node enabled/disabled. > + > +Following properties are ddr timing: > + > +- dram_speed_bin : Value is defined at include/dt-bindings/clock/ddr.h, > + it select ddr3 cl-trp-trcd type, default value > + "DDR3_DEFAULT".it must selected according to > + "Speed Bin" in ddr3 datasheet, DO NOT use smaller > + "Speed Bin" than ddr3 exactly is. > + > +- pd_idle : Config the PD_IDLE value, defined the power-down idle > + period, memories are places into power-down mode if > + bus is idle for PD_IDLE DFI clocks. > + > +- sr_idle : Configure the SR_IDLE value, defined the selfrefresh > + idle period, memories are places into self-refresh > + mode if bus is idle for SR_IDLE*1024 DFI clocks > + (DFI clocks freq is half of dram's clocks), defaule > + value is "0". > + > +- sr_mc_gate_idle : Defined the self-refresh with memory and controller > + clock gating idle period, memories are places into > + self-refresh mode and memory controller clock arg > + gating if bus is idle for sr_mc_gate_idle*1024 DFI > + clocks. > + > +- srpd_lite_idle : Defined the self-refresh power down idle period, > + memories are places into self-refresh power down > + mode if bus is idle for srpd_lite_idle*1024 DFI > + clocks. This parameter is for LPDDR4 only. > + > +- standby_idle : Defined the standby idle period, memories are places > + into self-refresh than controller, pi, phy and dram > + clock will gating if bus is idle for > + standby_idle * DFI clocks. > + > +- dram_dll_disb_freq : It's defined the DDR3 dll bypass frequency in MHz > + when ddr freq less than DRAM_DLL_DISB_FREQ, ddr3 > + dll will bypssed note: if dll was bypassed, the > + odt also stop working. > + > +- phy_dll_disb_freq : Defined the PHY dll bypass frequency in MHz (Mega Hz), > + when ddr freq less than DRAM_DLL_DISB_FREQ, phy dll > + will bypssed. note: phy dll and phy odt are > + independent > + > +- ddr3_odt_disb_freq : When dram type is DDR3, this parameter defined the > + odt disable frequency in MHz (Mega Hz), when ddr > + frequency less then ddr3_odt_disb_freq, the odt > + on dram side and controller side are both disabled. > + > +- ddr3_drv : When dram type is DDR3, this parameter define the > + dram side driver stength in ohm, default value is > + DDR3_DS_40ohm. > + > +- ddr3_odt : When dram type is DDR3, this parameter define the > + dram side ODT stength in ohm, default value is > + DDR3_ODT_120ohm. > + > +- phy_ddr3_ca_drv : When dram type is DDR3, this parameter define the phy > + side CA line(incluing command line, address line and > + clock line) driver strength. default value is > + PHY_DRV_ODT_40. > + > +- phy_ddr3_dq_drv : When dram type is DDR3, this parameter define the phy > + side DQ line(incluing DQS/DQ/DM line) driver strength. > + default value is PHY_DRV_ODT_40. > + > +- phy_ddr3_odt : When dram type is DDR3, this parameter define the > + phy side odt strength, default value is > + PHY_DRV_ODT_240. > + > +- lpddr3_odt_disb_freq : When dram type is LPDDR3, this parameter defined then > + odt disable frequency in MHz (Mega Hz), when ddr > + frequency less then ddr3_odt_disb_freq, the odt on > + dram side and controller side are both disabled. > + > +- lpddr3_drv : When dram type is LPDDR3, this parameter define the > + dram side driver stength in ohm, default value is > + LP3_DS_34ohm. > + > +- lpddr3_odt : When dram type is LPDDR3, this parameter define the > + dram side ODT stength in ohm, default value is > + LP3_ODT_240ohm. > + > +- phy_lpddr3_ca_drv : When dram type is LPDDR3, this parameter define the > + phy side CA line(incluing command line, address line > + and clock line) driver strength. default value is > + PHY_DRV_ODT_40. > + > +- phy_lpddr3_dq_drv : When dram type is LPDDR3, this parameter define the > + phy side DQ line(incluing DQS/DQ/DM line) driver > + strength. default value is PHY_DRV_ODT_40. > + > +- phy_lpddr3_odt : When dram type is LPDDR3, this parameter define the phy > + side odt strength, default value is PHY_DRV_ODT_240. > + > +- lpddr4_odt_disb_freq : When dram type is LPDDR4, this parameter defined the > + odt disable frequency in MHz (Mega Hz), when ddr > + frequency less then ddr3_odt_disb_freq, the odt on > + dram side and controller side are both disabled. > + > +- lpddr4_drv : When dram type is LPDDR4, this parameter define the > + dram side driver stength in ohm, default value is > + LP4_PDDS_60ohm. > + > +- lpddr4_dq_odt : When dram type is LPDDR4, this parameter define the > + dram side ODT on dqs/dq line stength in ohm, default > + value is LP4_DQ_ODT_40ohm. > + > +- lpddr4_ca_odt : When dram type is LPDDR4, this parameter define the > + dram side ODT on ca line stength in ohm, default value > + is LP4_CA_ODT_40ohm. > + > +- phy_lpddr4_ca_drv : When dram type is LPDDR4, this parameter define the > + phy side CA line(incluing command address line) > + driver strength. default value is PHY_DRV_ODT_40. > + > +- phy_lpddr4_ck_cs_drv : When dram type is LPDDR4, this parameter define the > + phy side clock line and cs line driver strength. > + default value is PHY_DRV_ODT_80. > + > +- phy_lpddr4_dq_drv : When dram type is LPDDR4, this parameter define the > + phy side DQ line(incluing DQS/DQ/DM line) driver > + strength. default value is PHY_DRV_ODT_80. > + > +- phy_lpddr4_odt : When dram type is LPDDR4, this parameter define the > + phy side odt strength, default value is PHY_DRV_ODT_60. It is good to explain the each field for ddr timing. But, why you you drop the example for ddr timing values? I think that you better to add the example for ddr timing values > + > +Example: > + dmc_opp_table: dmc_opp_table { > + compatible = "operating-points-v2"; > + > + opp00 { > + opp-hz = /bits/ 64 <300000000>; > + opp-microvolt = <900000>; > + }; > + opp01 { > + opp-hz = /bits/ 64 <666000000>; > + opp-microvolt = <900000>; > + }; > + }; > + > + dmc: dmc { > + compatible = "rockchip,rk3399-dmc"; > + devfreq-events = <&dfi>; > + interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>; > + clocks = <&cru SCLK_DDRCLK>; > + clock-names = "dmc_clk"; > + operating-points-v2 = <&dmc_opp_table>; > + center-supply = <&ppvar_centerlogic>; > + upthreshold = <15>; > + downdifferential = <10>; > + status = "disabled"; > + }; > + >
diff --git a/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt new file mode 100644 index 0000000..1f39b5cb --- /dev/null +++ b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt @@ -0,0 +1,173 @@ +* Rockchip rk3399 DMC(Dynamic Memory Controller) device + +Required properties: +- compatible: Must be "rockchip,rk3399-dmc". +- devfreq-events: Node to get DDR loading, Refer to + Documentation/devicetree/bindings/devfreq/ + rockchip-dfi.txt +- interrupts: The interrupt number to the CPU. The interrupt + specifier format depends on the interrupt controller. + It should be DCF interrupts, when DDR dvfs finish, + it will happen. +- clocks: Phandles for clock specified in "clock-names" property +- clock-names : The name of clock used by the DFI, must be + "pclk_ddr_mon"; +- operating-points-v2: Refer to Documentation/devicetree/bindings/power/opp.txt + for details. +- center-supply: DMC supply node. +- status: Marks the node enabled/disabled. + +Following properties are ddr timing: + +- dram_speed_bin : Value is defined at include/dt-bindings/clock/ddr.h, + it select ddr3 cl-trp-trcd type, default value + "DDR3_DEFAULT".it must selected according to + "Speed Bin" in ddr3 datasheet, DO NOT use smaller + "Speed Bin" than ddr3 exactly is. + +- pd_idle : Config the PD_IDLE value, defined the power-down idle + period, memories are places into power-down mode if + bus is idle for PD_IDLE DFI clocks. + +- sr_idle : Configure the SR_IDLE value, defined the selfrefresh + idle period, memories are places into self-refresh + mode if bus is idle for SR_IDLE*1024 DFI clocks + (DFI clocks freq is half of dram's clocks), defaule + value is "0". + +- sr_mc_gate_idle : Defined the self-refresh with memory and controller + clock gating idle period, memories are places into + self-refresh mode and memory controller clock arg + gating if bus is idle for sr_mc_gate_idle*1024 DFI + clocks. + +- srpd_lite_idle : Defined the self-refresh power down idle period, + memories are places into self-refresh power down + mode if bus is idle for srpd_lite_idle*1024 DFI + clocks. This parameter is for LPDDR4 only. + +- standby_idle : Defined the standby idle period, memories are places + into self-refresh than controller, pi, phy and dram + clock will gating if bus is idle for + standby_idle * DFI clocks. + +- dram_dll_disb_freq : It's defined the DDR3 dll bypass frequency in MHz + when ddr freq less than DRAM_DLL_DISB_FREQ, ddr3 + dll will bypssed note: if dll was bypassed, the + odt also stop working. + +- phy_dll_disb_freq : Defined the PHY dll bypass frequency in MHz (Mega Hz), + when ddr freq less than DRAM_DLL_DISB_FREQ, phy dll + will bypssed. note: phy dll and phy odt are + independent + +- ddr3_odt_disb_freq : When dram type is DDR3, this parameter defined the + odt disable frequency in MHz (Mega Hz), when ddr + frequency less then ddr3_odt_disb_freq, the odt + on dram side and controller side are both disabled. + +- ddr3_drv : When dram type is DDR3, this parameter define the + dram side driver stength in ohm, default value is + DDR3_DS_40ohm. + +- ddr3_odt : When dram type is DDR3, this parameter define the + dram side ODT stength in ohm, default value is + DDR3_ODT_120ohm. + +- phy_ddr3_ca_drv : When dram type is DDR3, this parameter define the phy + side CA line(incluing command line, address line and + clock line) driver strength. default value is + PHY_DRV_ODT_40. + +- phy_ddr3_dq_drv : When dram type is DDR3, this parameter define the phy + side DQ line(incluing DQS/DQ/DM line) driver strength. + default value is PHY_DRV_ODT_40. + +- phy_ddr3_odt : When dram type is DDR3, this parameter define the + phy side odt strength, default value is + PHY_DRV_ODT_240. + +- lpddr3_odt_disb_freq : When dram type is LPDDR3, this parameter defined then + odt disable frequency in MHz (Mega Hz), when ddr + frequency less then ddr3_odt_disb_freq, the odt on + dram side and controller side are both disabled. + +- lpddr3_drv : When dram type is LPDDR3, this parameter define the + dram side driver stength in ohm, default value is + LP3_DS_34ohm. + +- lpddr3_odt : When dram type is LPDDR3, this parameter define the + dram side ODT stength in ohm, default value is + LP3_ODT_240ohm. + +- phy_lpddr3_ca_drv : When dram type is LPDDR3, this parameter define the + phy side CA line(incluing command line, address line + and clock line) driver strength. default value is + PHY_DRV_ODT_40. + +- phy_lpddr3_dq_drv : When dram type is LPDDR3, this parameter define the + phy side DQ line(incluing DQS/DQ/DM line) driver + strength. default value is PHY_DRV_ODT_40. + +- phy_lpddr3_odt : When dram type is LPDDR3, this parameter define the phy + side odt strength, default value is PHY_DRV_ODT_240. + +- lpddr4_odt_disb_freq : When dram type is LPDDR4, this parameter defined the + odt disable frequency in MHz (Mega Hz), when ddr + frequency less then ddr3_odt_disb_freq, the odt on + dram side and controller side are both disabled. + +- lpddr4_drv : When dram type is LPDDR4, this parameter define the + dram side driver stength in ohm, default value is + LP4_PDDS_60ohm. + +- lpddr4_dq_odt : When dram type is LPDDR4, this parameter define the + dram side ODT on dqs/dq line stength in ohm, default + value is LP4_DQ_ODT_40ohm. + +- lpddr4_ca_odt : When dram type is LPDDR4, this parameter define the + dram side ODT on ca line stength in ohm, default value + is LP4_CA_ODT_40ohm. + +- phy_lpddr4_ca_drv : When dram type is LPDDR4, this parameter define the + phy side CA line(incluing command address line) + driver strength. default value is PHY_DRV_ODT_40. + +- phy_lpddr4_ck_cs_drv : When dram type is LPDDR4, this parameter define the + phy side clock line and cs line driver strength. + default value is PHY_DRV_ODT_80. + +- phy_lpddr4_dq_drv : When dram type is LPDDR4, this parameter define the + phy side DQ line(incluing DQS/DQ/DM line) driver + strength. default value is PHY_DRV_ODT_80. + +- phy_lpddr4_odt : When dram type is LPDDR4, this parameter define the + phy side odt strength, default value is PHY_DRV_ODT_60. + +Example: + dmc_opp_table: dmc_opp_table { + compatible = "operating-points-v2"; + + opp00 { + opp-hz = /bits/ 64 <300000000>; + opp-microvolt = <900000>; + }; + opp01 { + opp-hz = /bits/ 64 <666000000>; + opp-microvolt = <900000>; + }; + }; + + dmc: dmc { + compatible = "rockchip,rk3399-dmc"; + devfreq-events = <&dfi>; + interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&cru SCLK_DDRCLK>; + clock-names = "dmc_clk"; + operating-points-v2 = <&dmc_opp_table>; + center-supply = <&ppvar_centerlogic>; + upthreshold = <15>; + downdifferential = <10>; + status = "disabled"; + }; +
This patch adds the documentation for rockchip rk3399 dmc driver. Signed-off-by: Lin Huang <hl@rock-chips.com> --- Changes in v8: - add ddr timing properties Changes in v7: -None Changes in v6: -Add more detail in Documentation Changes in v5: -None Changes in v4: -None Changes in v3: -None Changes in v2: -None Changes in v1: -None .../devicetree/bindings/devfreq/rk3399_dmc.txt | 173 +++++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100644 Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt