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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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37786c7fee
SoC peripherals can come in several different flavors: - little-endian: registers always need to be accessed in LE mode (so the kernel should perform a swap if the CPU is running BE) - big-endian: registers always need to be accessed in BE mode (so the kernel should perform a swap if the CPU is running LE) - native-endian: the bus will automatically swap accesses, so the kernel should never swap Introduce a function that checks an OF device node to see whether it contains a "big-endian" or "native-endian" property. For the former case, always return true. For the latter case, return true iff the kernel was built for BE (implying that the BE MMIO accessors do not perform a swap). Otherwise return false, assuming LE registers. LE registers are assumed by default because most existing drivers (libahci, serial8250, usb) always use readl/writel in the absence of instructions to the contrary, so that will be our fallback. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rob Herring <robh@kernel.org> |
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| .. | ||
| unittest-data | ||
| address.c | ||
| base.c | ||
| device.c | ||
| dynamic.c | ||
| fdt_address.c | ||
| fdt.c | ||
| irq.c | ||
| Kconfig | ||
| Makefile | ||
| of_mdio.c | ||
| of_mtd.c | ||
| of_net.c | ||
| of_pci_irq.c | ||
| of_pci.c | ||
| of_private.h | ||
| of_reserved_mem.c | ||
| overlay.c | ||
| pdt.c | ||
| platform.c | ||
| resolver.c | ||
| unittest.c | ||