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@@ -10,6 +10,17 @@ Optional properties:
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configuration in TPL/SPL to reduce code size and boot time, since these
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phases only know about a small subset of PCI devices.
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+For PCI devices the following optional property is available:
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+
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+- pci,no-autoconfig : Don't automatically configure this PCI device at all.
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+ This is used when the device is statically configured and must maintain
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+ this same config throughout the boot process. An example is a serial
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+ UART being used to debug PCI configuration, since reconfiguring it stops
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+ the UART from working until the driver is re-probed, and this can cause
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+ output to be lost. This should not generally be used in production code,
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+ although it is often harmless.
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+
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+
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Example:
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pci {
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@@ -21,4 +32,16 @@ pci {
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0x42000000 0x0 0xb0000000 0xb0000000 0 0x10000000
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0x01000000 0x0 0x1000 0x1000 0 0xefff>;
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u-boot,skip-auto-config-until-reloc;
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+
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+
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+ serial: serial@18,2 {
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+ reg = <0x0200c210 0 0 0 0>;
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+ u-boot,dm-pre-reloc;
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+ compatible = "intel,apl-ns16550";
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+ early-regs = <0xde000000 0x20>;
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+ reg-shift = <2>;
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+ clock-frequency = <1843200>;
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+ current-speed = <115200>;
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+ pci,no-autoconfig;
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+ };
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};
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