MPC83xx RAM controller This driver supplies support for the embedded RAM controller on MCP83xx-series SoCs. For static configuration mode, each controller node should have child nodes describing the actual RAM modules installed. Controller node =============== Required properties: - compatible: Must be "fsl,mpc83xx-mem-controller" - reg: The address of the RAM controller's register space - #address-cells: Must be 2 - #size-cells: Must be 1 - driver_software_override: DDR driver software override is enabled (1) or disabled (0) - p_impedance_override: DDR driver software p-impedance override; possible values: * DSO_P_IMPEDANCE_HIGHEST_Z * DSO_P_IMPEDANCE_MUCH_HIGHER_Z * DSO_P_IMPEDANCE_HIGHER_Z * DSO_P_IMPEDANCE_NOMINAL * DSO_P_IMPEDANCE_LOWER_Z - n_impedance_override: DDR driver software n-impedance override; possible values: * DSO_N_IMPEDANCE_HIGHEST_Z * DSO_N_IMPEDANCE_MUCH_HIGHER_Z * DSO_N_IMPEDANCE_HIGHER_Z * DSO_N_IMPEDANCE_NOMINAL * DSO_N_IMPEDANCE_LOWER_Z - odt_termination_value: ODT termination value for I/Os; possible values: * ODT_TERMINATION_75_OHM * ODT_TERMINATION_150_OHM - ddr_type: Selects voltage level for DDR pads; possible values: * DDR_TYPE_DDR2_1_8_VOLT * DDR_TYPE_DDR1_2_5_VOLT - mvref_sel: Determine where MVREF_SEL signal is generated; possible values: * MVREF_SEL_EXTERNAL * MVREF_SEL_INTERNAL_GVDD - m_odr: Disable memory transaction reordering; possible values: * M_ODR_ENABLE * M_ODR_DISABLE - clock_adjust: Clock adjust; possible values: * CLOCK_ADJUST_025 * CLOCK_ADJUST_05 * CLOCK_ADJUST_075 * CLOCK_ADJUST_1 - ext_refresh_rec: Extended refresh recovery time; possible values: 0, 16, 32, 48, 64, 80, 96, 112 - read_to_write: Read-to-write turnaround; possible values: 0, 1, 2, 3 - write_to_read: Write-to-read turnaround; possible values: 0, 1, 2, 3 - read_to_read: Read-to-read turnaround; possible values: 0, 1, 2, 3 - write_to_write: Write-to-write turnaround; possible values: 0, 1, 2, 3 - active_powerdown_exit: Active powerdown exit timing; possible values: 1, 2, 3, 4, 5, 6, 7 - precharge_powerdown_exit: Precharge powerdown exit timing; possible values: 1, 2, 3, 4, 5, 6, 7 - odt_powerdown_exit: ODT powerdown exit timing; possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 - mode_reg_set_cycle: Mode register set cycle time; possible values: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 - precharge_to_activate: Precharge-to-acitvate interval; possible values: 1, 2, 3, 4, 5, 6, 7 - activate_to_precharge: Activate to precharge interval; possible values: 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 - activate_to_readwrite: Activate to read/write interval for SDRAM; possible values: 1, 2, 3, 4, 5, 6, 7 - mcas_latency: MCAS latency from READ command; possible values: * CASLAT_20 * CASLAT_25 * CASLAT_30 * CASLAT_35 * CASLAT_40 * CASLAT_45 * CASLAT_50 * CASLAT_55 * CASLAT_60 * CASLAT_65 * CASLAT_70 * CASLAT_75 * CASLAT_80 - refresh_recovery: Refresh recovery time; possible values: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 - last_data_to_precharge: Last data to precharge minimum interval; possible values: 1, 2, 3, 4, 5, 6, 7 - activate_to_activate: Activate-to-activate interval; possible values: 1, 2, 3, 4, 5, 6, 7 - last_write_data_to_read: Last write data pair to read command issue interval; possible values: 1, 2, 3, 4, 5, 6, 7 - additive_latency: Additive latency; possible values: 0, 1, 2, 3, 4, 5 - mcas_to_preamble_override: MCAS-to-preamble-override; possible values: * READ_LAT * READ_LAT_PLUS_1_4 * READ_LAT_PLUS_1_2 * READ_LAT_PLUS_3_4 * READ_LAT_PLUS_1 * READ_LAT_PLUS_5_4 * READ_LAT_PLUS_3_2 * READ_LAT_PLUS_7_4 * READ_LAT_PLUS_2 * READ_LAT_PLUS_9_4 * READ_LAT_PLUS_5_2 * READ_LAT_PLUS_11_4 * READ_LAT_PLUS_3 * READ_LAT_PLUS_13_4 * READ_LAT_PLUS_7_2 * READ_LAT_PLUS_15_4 * READ_LAT_PLUS_4 * READ_LAT_PLUS_17_4 * READ_LAT_PLUS_9_2 * READ_LAT_PLUS_19_4 - write_latency: Write latency; possible values: 1, 2, 3, 4, 5, 6, 7 - read_to_precharge: Read to precharge; possible values: 1, 2, 3, 4 - write_cmd_to_write_data: Write command to write data strobe timing adjustment; possible values: * CLOCK_DELAY_0 * CLOCK_DELAY_1_4 * CLOCK_DELAY_1_2 * CLOCK_DELAY_3_4 * CLOCK_DELAY_1 * CLOCK_DELAY_5_4 * CLOCK_DELAY_3_2 - minimum_cke_pulse_width: Minimum CKE pulse width; possible values: 1, 2, 3, 4 - four_activates_window: Window for four activates; possible values: 1, 2, 3, 4 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 - self_refresh: Self refresh (during sleep); possible values: * SREN_DISABLE * SREN_ENABLE - ecc: Support for ECC; possible values: * ECC_DISABLE * ECC_ENABLE - registered_dram: Support for registered DRAM; possible values: * RD_DISABLE * RD_ENABLE - sdram_type: Type of SDRAM device to be used; possible values: * TYPE_DDR1 * TYPE_DDR2 - dynamic_power_management: Dynamic power management mode; possible values: * DYN_PWR_DISABLE * DYN_PWR_ENABLE - databus_width: DRAM data bus width; possible values * DATA_BUS_WIDTH_16 * DATA_BUS_WIDTH_32 - nc_auto_precharge: Non-concurrent auto-precharge; possible values: * NCAP_DISABLE * NCAP_ENABLE - timing_2t: 2T timing; possible values: * TIMING_1T * TIMING_2T - bank_interleaving_ctrl: Bank (chip select) interleaving control; possible values: * INTERLEAVE_NONE * INTERLEAVE_1_AND_2 - precharge_bit_8: Precharge bin 8; possible values * PRECHARGE_MA_10 * PRECHARGE_MA_8 - half_strength: Global half-strength override; possible values: * STRENGTH_FULL * STRENGTH_HALF - bypass_initialization: Bypass initialization; possible values: * INITIALIZATION_DONT_BYPASS * INITIALIZATION_BYPASS - force_self_refresh: Force self refresh; possible values: * MODE_NORMAL * MODE_REFRESH - dll_reset: DLL reset; possible values: * DLL_RESET_ENABLE * DLL_RESET_DISABLE - dqs_config: DQS configuration; possible values: * DQS_TRUE - odt_config: ODT configuration; possible values: * ODT_ASSERT_NEVER * ODT_ASSERT_WRITES * ODT_ASSERT_READS * ODT_ASSERT_ALWAYS - posted_refreshes: Number of posted refreshes 1, 2, 3, 4, 5, 6, 7, 8 - sdmode: Initial value loaded into the DDR SDRAM mode register - esdmode: Initial value loaded into the DDR SDRAM extended mode register - esdmode2: Initial value loaded into the DDR SDRAM extended mode 2 register - esdmode3: Initial value loaded into the DDR SDRAM extended mode 3 register - refresh_interval: Refresh interval; possible values: 0 - 65535 - precharge_interval: Precharge interval; possible values: 0 - 16383 RAM module node: ================ Required properties: - reg: A triple , which consists of: * cs - the chipselect used to drive this RAM module * addr - the address where this RAM module's memory is map to in the global memory space * size - the size of the RAM module's memory in bytes - auto_precharge: Chip select auto-precharge; possible values: * AUTO_PRECHARGE_ENABLE * AUTO_PRECHARGE_DISABLE - odt_rd_cfg: ODT for reads configuration; possible values: * ODT_RD_NEVER * ODT_RD_ONLY_CURRENT * ODT_RD_ONLY_OTHER_CS * ODT_RD_ONLY_OTHER_DIMM * ODT_RD_ALL - odt_wr_cfg: ODT for writes configuration; possible values: * ODT_WR_NEVER * ODT_WR_ONLY_CURRENT * ODT_WR_ONLY_OTHER_CS * ODT_WR_ONLY_OTHER_DIMM * ODT_WR_ALL - bank_bits: Number of bank bits for SDRAM on chip select; possible values: 2, 3 - row_bits: Number of row bits for SDRAM on chip select; possible values: 12, 13, 14 - col_bits: Number of column bits for SDRAM on chip select; possible values: 8, 9, 10, 11 Example: memory@2000 { #address-cells = <2>; #size-cells = <1>; compatible = "fsl,mpc83xx-mem-controller"; reg = <0x2000 0x1000>; device_type = "memory"; bootph-all; driver_software_override = ; p_impedance_override = ; n_impedance_override = ; odt_termination_value = ; ddr_type = ; clock_adjust = ; read_to_write = <0>; write_to_read = <0>; read_to_read = <0>; write_to_write = <0>; active_powerdown_exit = <2>; precharge_powerdown_exit = <6>; odt_powerdown_exit = <8>; mode_reg_set_cycle = <2>; precharge_to_activate = <2>; activate_to_precharge = <6>; activate_to_readwrite = <2>; mcas_latency = ; refresh_recovery = <17>; last_data_to_precharge = <2>; activate_to_activate = <2>; last_write_data_to_read = <2>; additive_latency = <0>; mcas_to_preamble_override = ; write_latency = <3>; read_to_precharge = <2>; write_cmd_to_write_data = ; minimum_cke_pulse_width = <3>; four_activates_window = <5>; self_refresh = ; sdram_type = ; databus_width = ; force_self_refresh = ; dll_reset = ; dqs_config = ; odt_config = ; posted_refreshes = <1>; refresh_interval = <2084>; precharge_interval = <256>; sdmode = <0x0242>; esdmode = <0x0440>; ram@0 { reg = <0x0 0x0 0x8000000>; compatible = "nanya,nt5tu64m16hg"; odt_rd_cfg = ; odt_wr_cfg = ; bank_bits = <3>; row_bits = <13>; col_bits = <10>; }; };