dts: bcm2711: Don't mark timer regs unconfigured#6602
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pelwell merged 1 commit intoraspberrypi:rpi-6.6.yfrom Jan 10, 2025
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dts: bcm2711: Don't mark timer regs unconfigured#6602pelwell merged 1 commit intoraspberrypi:rpi-6.6.yfrom
pelwell merged 1 commit intoraspberrypi:rpi-6.6.yfrom
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The DT property arm,cpu-registers-not-fw-configured tells the kernel that the ARM architectural timer has not been configured by the firmware. This prevents the use of a vDSO - a faster alternative to a syscall for some common kernel operations. However, on Pi 4 the firmware does configure the timer, so this property is unnecessary. Delete it. Also remove it from the bcm2712.dtsi where it should never have been, since it is only relevant to 32-bit ARM kernels. Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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kernel: dts: bcm2711: Don't mark timer regs unconfigured See: raspberrypi/linux#6602 kernel: mmc: bcm2835-sdhost Observe SWIOTLB memory limit See: raspberrypi/linux#6603 kernel: drivers: media: pisp_be: Add support for YUV422 planar format See: raspberrypi/linux#6613 kernel: drivers: media: pisp_be: Remove unused fields in struct pisp_be_config See: raspberrypi/linux#6614
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kernel: dts: bcm2711: Don't mark timer regs unconfigured See: raspberrypi/linux#6602 kernel: mmc: bcm2835-sdhost Observe SWIOTLB memory limit See: raspberrypi/linux#6603 kernel: drivers: media: pisp_be: Add support for YUV422 planar format See: raspberrypi/linux#6613 kernel: drivers: media: pisp_be: Remove unused fields in struct pisp_be_config See: raspberrypi/linux#6614
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The DT property arm,cpu-registers-not-fw-configured tells the kernel that the ARM architectural timer has not been configured by the firmware. This prevents the use of a vDSO - a faster alternative to a syscall for some common kernel operations.
However, on Pi 4 the firmware does configure the timer, so this property is unnecessary. Delete it.
Also remove it from the bcm2712.dtsi where it should never have been, since it is only relevant to 32-bit ARM kernels.