[coreboot-gerrit] Change in coreboot[master]: soc/intel/common/block/lpc: Add lpc_get_fixed_io_decode

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/38745 )

Change subject: soc/intel/common/block/lpc: Add lpc_get_fixed_io_decode
......................................................................

soc/intel/common/block/lpc: Add lpc_get_fixed_io_decode

Add function to return the fixed io decode ranges contained in register
0x80 of the LPC interface.

BUG=N/A
TEST=build

Change-Id: Ie46d7c9d7a399a8489c030d906f75ba61db19cc4
Signed-off-by: Wim Vervoorn 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38745
Reviewed-by: Frans Hendriks 
Reviewed-by: Paul Menzel 
Tested-by: build bot (Jenkins) 
---
M src/soc/intel/common/block/include/intelblocks/lpc_lib.h
M src/soc/intel/common/block/lpc/lpc_lib.c
2 files changed, 7 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Paul Menzel: Looks good to me, but someone else must approve
  Frans Hendriks: Looks good to me, approved

diff --git a/src/soc/intel/common/block/include/intelblocks/lpc_lib.h b/src/soc/intel/common/block/include/intelblocks/lpc_lib.h
index f77b8d5..cf6d8e9 100644
--- a/src/soc/intel/common/block/include/intelblocks/lpc_lib.h
+++ b/src/soc/intel/common/block/include/intelblocks/lpc_lib.h
@@ -70,6 +70,8 @@
  * Output:I/O Enable Bits
  */
 uint16_t lpc_enable_fixed_io_ranges(uint16_t io_enables);
+/* Return the current decode settings */
+uint16_t lpc_get_fixed_io_decode(void);
 /* Open a generic IO window to the LPC bus. Four windows are available. */
 void lpc_open_pmio_window(uint16_t base, uint16_t size);
 /* Close all generic IO windows to the LPC bus. */
diff --git a/src/soc/intel/common/block/lpc/lpc_lib.c b/src/soc/intel/common/block/lpc/lpc_lib.c
index bc89e4c..3ad2176 100644
--- a/src/soc/intel/common/block/lpc/lpc_lib.c
+++ b/src/soc/intel/common/block/lpc/lpc_lib.c
@@ -37,6 +37,11 @@
    return io_enables;
 }

+uint16_t lpc_get_fixed_io_decode(void)
+{
+	return pci_read_config16(PCH_DEV_LPC, LPC_IO_DECODE);
+}
+
 /*
  * Find the first unused IO window.
  * Returns -1 if not found, 0 for reg 0x84, 1 for reg 0x88 ...