41 lines
1.5 KiB
Plaintext
41 lines
1.5 KiB
Plaintext
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* Power Management boot configuration (pm-boot)
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Low power management drivers need to specify the warmboot entry path for the
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application processors to resume from sleep/suspend. The boot configuration
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can vary if the core does/does not support a secure boot mode. The secure
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boot configuration boots the core sets up the core sub system registers and
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calls into the kernel entry point. In the absence of a secure boot mode, the
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core when powered on from reset will need to be configured with the warmboot
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entry pointer. The physical and the virtual address for the entry pointer
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need to provided to the driver.
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The device tree parameters for pm-boot are:
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Required parameters:
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- compatible: Must be "qcom,pm-boot"
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- qcom,mode: The mode that the target will use for booting
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"tz" = MSM_PM_BOOT_CONFIG_TZ,
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"reset_vector_phys" = MSM_PM_BOOT_CONFIG_RESET_VECTOR_PHYS,
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"reset_vector_virt" = MSM_PM_BOOT_CONFIG_RESET_VECTOR_VIRT,
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"remap_boot_addr" = MSM_PM_BOOT_CONFIG_REMAP_BOOT_ADDR,
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Optional parameters (based on the mode chosen):
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- qcom,phy-addr: The physical address that will be used for warmboot entry if
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the processor remap register can be programmed.
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Needed for modes = { MSM_PM_BOOT_CONFIG_RESET_VECTOR_PHYS,
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MSM_PM_BOOT_CONFIG_REMAP_BOOT_ADDR }
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- qcom,virt-addr: The virtual address at which the processor start booting from
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Needed for modes = { MSM_PM_BOOT_CONFIG_RESET_VECTOR_VIRT,
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MSM_PM_BOOT_CONFIG_REMAP_BOOT_ADDR }
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Example:
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qcom,pm-boot {
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compatible = "qcom,pm-boot";
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qcom,mode = "tz"; /* MSM_PM_BOOT_CONFIG_TZ */
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};
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