| * MSM Subsystem Power Manager (spm-v2) |
| |
| S4 generation of MSMs have SPM hardware blocks to control the Application |
| Processor Sub-System power. These SPM blocks run individual state machine |
| to determine what the core (L2 or Krait/Scorpion) would do when the WFI |
| instruction is executed by the core. The SAW hardware block handles SPM and |
| AVS functionality for the cores. |
| |
| The devicetree representation of the SPM block should be: |
| |
| Required properties |
| |
| - compatible: "qcom,spm-v2" |
| - reg: The physical address and the size of the SPM's memory mapped registers |
| - qcom, core-id: The core id the SPM block is attached to. |
| {0..n} for cores {0..n} |
| {0xffff} for L2 |
| - qcom,saw2-ver-reg: The location of the version register |
| - qcom,saw2-cfg: SAW2 configuration register |
| - qcom,saw2-avs-ctl: The AVS control register |
| - qcom,saw2-avs-hysterisis: The AVS hysterisis register to delay the AVS |
| controller requests |
| - qcom,saw2-spm-dly: Provides the values for the SPM delay command in the SPM |
| sequence |
| - qcom,saw2-spm-ctl: The SPM control register |
| - qcom,saw2-vctl-timeout-us: The timeout value to wait for voltage to change |
| after sending the voltage command to the PMIC |
| |
| Optional properties |
| |
| - qcom,saw2-avs-limit: The AVS limit register |
| - qcom,saw2-avs-dly: The AVS delay register is used to specify the delay values |
| between AVS controller requests |
| - qcom,saw2-pmic-data0..7: Specify the pmic data value and the associated FTS |
| index to send the PMIC data to |
| - qcom,vctl-port: The PVC (PMIC Virtual Channel) port used for changing |
| voltage |
| - qcom,phase-port: The PVC port used for changing the number of phases |
| - qcom,pfm-port: The PVC port used for enabling PWM/PFM modes |
| - qcom,saw2-spm-cmd-wfi: The WFI command sequence |
| - qcom,saw2-spm-cmd-ret: The Retention command sequence |
| - qcom,saw2-spm-cmd-spc: The Standalone PC command sequence |
| - qcom,saw2-spm-cmd-pc-no-rpm: The Power Collapse command sequence where APPS |
| proc won't inform the RPM. |
| - qcom,saw2-spm-cmd-pc: The Power Collapse command sequence |
| - qcom,saw2-spm-cmd-gdhs: L2 GDHS command sequence |
| - qcom,L2-spm-is-apcs-master: Boolean indicates if the target uses L2 SAW to |
| control the gang rail. If this is not specified the driver assumes |
| that the cpus run with their own separate rails and each cpu's spm |
| talks to its regulator. |
| |
| Example: |
| qcom,spm@f9089000 { |
| compatible = "qcom,spm-v2"; |
| #address-cells = <1>; |
| #size-cells = <1>; |
| reg = <0xf9089000 0x1000>; |
| qcom,core-id = <0>; |
| qcom,saw2-ver-reg = <0xfd0>; |
| qcom,saw2-cfg = <0x1b>; |
| qcom,saw2-avs-ctl = <0>; |
| qcom,saw2-avs-hysteresis = <0>; |
| qcom,saw2-avs-limit = <0>; |
| qcom,saw2-avs-dly= <0>; |
| qcom,saw2-spm-dly= <0x20000400>; |
| qcom,saw2-spm-ctl = <0x1>; |
| qcom,saw2-spm-cmd-wfi = [03 0b 0f]; |
| qcom,saw2-spm-cmd-spc = [00 20 50 80 60 70 10 92 |
| a0 b0 03 68 70 3b 92 a0 b0 |
| 82 2b 50 10 30 02 22 30 0f]; |
| qcom,saw2-spm-cmd-pc = [00 20 10 92 a0 b0 07 3b 92 |
| a0 b0 82 10 30 02 22 30 0f]; |
| }; |
| |
