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EmbeddedPkg: introduce GPIO PPI

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Introduce a PPI counterpart of the existing 'embedded GPIO' protocol,
so we can manipulate GPIOs from PEI modules. This allows things like
setting the boot mode based on a DIP switch setting.

Note that the naming is slightly awkward, as there is nothing 'embedded'
about a GPIO, but given that the DXE protocol already resides here and
has the 'embedded' prefix, it makes sense to retain uniformity.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel
2017-11-01 12:54:39 +00:00
parent 5cf459731f
commit b1832e16dd
2 changed files with 154 additions and 0 deletions
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EmbeddedPkg/EmbeddedPkg.dec
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@@ -86,6 +86,9 @@
gPlatformGpioProtocolGuid = { 0x52ce9845, 0x5af4, 0x43e2, {0xba, 0xfd, 0x23, 0x08, 0x12, 0x54, 0x7a, 0xc2 }}
gAndroidBootImgProtocolGuid = { 0x9859bb19, 0x407c, 0x4f8b, {0xbc, 0xe1, 0xf8, 0xda, 0x65, 0x65, 0xf4, 0xa5 }}
[Ppis]
gEdkiiEmbeddedGpioPpiGuid = { 0x21c3b115, 0x4e0b, 0x470c, { 0x85, 0xc7, 0xe1, 0x05, 0xa5, 0x75, 0xc9, 0x7b }}
[PcdsFeatureFlag.common]
gEmbeddedTokenSpaceGuid.PcdEmbeddedMacBoot|FALSE|BOOLEAN|0x00000001
gEmbeddedTokenSpaceGuid.PcdEmbeddedDirCmd|TRUE|BOOLEAN|0x00000002