util/intelp2m: Add Intel Pad to Macro utility

This patch adds a new utility for converting a pad configuration from
the inteltool dump to the PAD_CFG_*() macros [1] for coreboot and GPIO
config data structures for FSP/sdk2-platforms/slimbootloader [2,3].
Mirror: https://github.com/maxpoliak/pch-pads-parser.git

[1] src/soc/intel/common/block/include/intelblocks/gpio_defs.h
[2] https://slimbootloader.github.io/tools/index.html#gpio-tool
[3] 3rdparty/fsp/CometLakeFspBinPkg/CometLake1/Include/GpioSampleDef.h

Change-Id: If3e3b523c4f63dc2f91e9ccd16934e3a1b6e21fa
Signed-off-by: Maxim Polyakov <max.senia.poliak@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35643
Reviewed-by: Andrey Petrov <andrey.petrov@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/intelp2m/fields/raw/raw.go

@@ -0,0 +1,28 @@
+package raw
+
+import "fmt"
+import "../../platforms/common"
+
+type FieldMacros struct {}
+
+func (FieldMacros) DecodeDW0() {
+	macro := common.GetMacro()
+	// Do not decode, print as is.
+	macro.Add(fmt.Sprintf("0x%0.8x", macro.Register(common.PAD_CFG_DW0).ValueGet()))
+}
+
+func (FieldMacros) DecodeDW1() {
+	macro := common.GetMacro()
+	// Do not decode, print as is.
+	macro.Add(fmt.Sprintf("0x%0.8x", macro.Register(common.PAD_CFG_DW1).ValueGet()))
+}
+
+// GenerateString - generates the entire string of bitfield macros.
+func (bitfields FieldMacros) GenerateString() {
+	macro := common.GetMacro()
+	macro.Add("_PAD_CFG_STRUCT(").Id().Add(", ")
+	bitfields.DecodeDW0()
+	macro.Add(", ")
+	bitfields.DecodeDW1()
+	macro.Add("),")
+}