soc/intel/skylake: Control fixed IO decode from devicetree
The current implementation doesn't allow custom values for the LPC IO
decodes and IO enables.
Add the lpc_ioe and lpc_iod values. If they are not zero, they will be
used instead of the current handling for COMA and COMB.
BUG=N/A
TEST=tested on facebook monolith
Change-Id: Iad7bb0e44739e8d656a542c79af7f98a4e9bde69
Signed-off-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38748
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/common/block/lpc/lpc_lib.c b/src/soc/intel/common/block/lpc/lpc_lib.c
index 5b30a81..8edbd2e 100644
--- a/src/soc/intel/common/block/lpc/lpc_lib.c
+++ b/src/soc/intel/common/block/lpc/lpc_lib.c
@@ -42,6 +42,17 @@
return pci_read_config16(PCH_DEV_LPC, LPC_IO_DECODE);
}
+uint16_t lpc_set_fixed_io_ranges(uint16_t io_ranges, uint16_t mask)
+{
+ uint16_t reg_io_ranges;
+
+ reg_io_ranges = lpc_get_fixed_io_decode() & ~mask;
+ io_ranges |= reg_io_ranges & mask;
+ pci_write_config16(PCH_DEV_LPC, LPC_IO_DECODE, io_ranges);
+
+ return io_ranges;
+}
+
/*
* Find the first unused IO window.
* Returns -1 if not found, 0 for reg 0x84, 1 for reg 0x88 ...