This patch makes a few cosmetic changes:
- Rename tristate_gpios.c to gpio.c since it will soon be used for
binary GPIOs as well.
- Rename gpio_get_tristates() to gpio_base3_value() - The binary
version will be called gpio_base2_value().
- Updates call sites.
- Change the variable name "id" to something more generic.
BUG=none
BRANCH=none
TEST=compiled for veyron_pinky and storm
Change-Id: Iab7e32f4e9d70853f782695cfe6842accff1df64
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: c47d0f33ea1a6e9515211b834009cf47a171953f
Original-Change-Id: I36d88c67cb118efd1730278691dc3e4ecb6055ee
Original-Signed-off-by: David Hendricks <dhendrix@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/228324
Reviewed-on: http://review.coreboot.org/9411
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
The function to read board IDs from tristate GPIOs currently supports
two output modes: a normal base-3 integer, or a custom format where
every two bits represent one tristate pin. Each board decides which
representation to use on its own, which is inconsistent and provides
another possible gotcha to trip over when reading unfamiliar code.
The two-bits-per-pin format creates the additional problem that a
complete list of IDs (such as some boards use to build board-ID tables)
necessarily has "holes" in them (since 0b11 does not correspond to a
possible pin state), which makes them extremely tricky to write, read
and expand. It's also very unintuitive in my opinion, although it was
intended to make it easier to read individual pin states from a hex
representation.
This patch switches all boards over to base-3 and removes the other
format to improve consistency. The tristate reading function will just
print the pin states as they are read to make it easier to debug them,
and we add a new BASE3() macro that can generate ternary numbers from
pin states. Also change the order of all static initializers of board ID
pin lists to write the most significant bit first, hoping that this can
help clear up confusion about the endianness of the pins.
CQ-DEPEND=CL:219902
BUG=None
TEST=Booted on a Nyan_Blaze (with board ID 1, unfortunately the only one
I have). Compiled on Daisy, Peach_Pit, Nyan, Nyan_Big, Nyan_Blaze, Rush,
Rush_Ryu, Storm, Veryon_Pinky and Falco for good measure.
Change-Id: I3ce5a0829f260db7d7df77e6788c2c6d13901b8f
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 2fa9545ac431c9af111ee4444d593ee4cf49554d
Original-Change-Id: I6133cdaf01ed6590ae07e88d9e85a33dc013211a
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/219901
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9401
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
We've had gpiolib.h which defines a few common GPIO access functions for
a while, but it wasn't really complete. This patch adds the missing
gpio_output() function, and also renames the unwieldy
gpio_get_in_value() and gpio_set_out_value() to the much easier to
handle gpio_get() and gpio_set(). The header is renamed to the simpler
gpio.h while we're at it (there was never really anything "lib" about
it, and it was presumably just chosen due to the IPQ806x include/
conflict problem that is now resolved).
It also moves the definition of gpio_t into SoC-specific code, so that
different implementations are free to encode their platform-specific
GPIO parameters in those 4 bytes in the most convenient way (such as the
rk3288 with a bitfield struct). Every SoC intending to use this common
API should supply a <soc/gpio.h> that typedefs gpio_t to a type at most
4 bytes in length. Files accessing the API only need to include <gpio.h>
which may pull in additional things (like a gpio_t creation macro) from
<soc/gpio.h> on its own.
For now the API is still only used on non-x86 SoCs. Whether it makes
sense to expand it to x86 as well should be separately evaluated at a
later point (by someone who understands those systems better). Also,
Exynos retains its old, incompatible GPIO API even though it would be a
prime candidate, because it's currently just not worth the effort.
BUG=None
TEST=Compiled on Daisy, Peach_Pit, Nyan_Blaze, Rush_Ryu, Storm and
Veyron_Pinky.
Change-Id: Ieee77373c2bd13d07ece26fa7f8b08be324842fe
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 9e04902ada56b929e3829f2c3b4aeb618682096e
Original-Change-Id: I6c1e7d1e154d9b02288aabedb397e21e1aadfa15
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/220975
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9400
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This patch aligns tegra124 to the new SoC header include scheme.
Also alphabetized headers in affected files since we touch them anyway.
BUG=None
TEST=Tested with whole series. Compiled Nyan, Nyan_Big and Nyan_Blaze.
Change-Id: Ia82ab86b2af903690cc6c9d310f7bdda3425ea7c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 4d23774e071ec22781991ff20fbf63802f620c88
Original-Change-Id: Ia126cff8590117788d1872e50608c257d2659c1f
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/224504
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/9326
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
The name was changed due to review comments misunderstanding, it
should be restored to properly convey what the function does.
BUG=chrome-os-partner:30489
TEST=verified that Storm still properly reports board ID
Change-Id: Iba33cf837e137424bfac970b0c9764d26786be9c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: c0fff28c6ebf255cb9cf9dfe4c961d7a25bb13ff
Original-Change-Id: I4bd63f29afbfaf9f3e3e78602564eb52f63cc487
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/211413
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8979
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Some platforms use tertiary interpretation of GPIO input state to
increase number of distinct values represented by a limited number of
GPIOs. The three states are
- external pull down (interpreted as 0)
- external pull up (1)
- not connected (2)
This has been required by Nvidia devices so far, but Exynos and
Ipq8086 platforms need this too.
This patch moves the function reading the tertiary state into the
library and exposes the necessary GPIO API functions in a new include
file. The functions are still supposed to be provided by platform
specific modules.
The function interpreting the GPIO states has been modified to allow
to interpret the state either as a true tertiary number or as a set
two bit fields.
Since linker garbage collection is not happening when building x86
targets, a new configuration option is being added to include the new
module only when needed.
BUG=chrome-os-partner:30489
TEST=verified that nyan_big still reports proper revision ID.
Change-Id: Ib55122c359629b58288c1022da83e6c63dc2264d
Original-Change-Id: I243c9f43c82bd4a41de2154bbdbd07df0a241046
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/209673
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit c79ef1c545d073eaad69e6c8c629f9656b8c2f3e)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/8717
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
There is no point in duplicating boardid.h per board - they are all
the same. Let's keep a single instance in the common include directory
and let the linker report a problem if one tries using this function
on a board where it is not supported.
BUG=chrome-os-partner:30489
TEST=verified that coreboot builds fine for nyan_big and nyan_blaze.
Original-Change-Id: Ifbe9c2287a1d828d4db74c637d1d02047ac4da25
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/209699
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit 589e6415faf18ca6aaf44da343dd33eadc8a53d3)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I8eef89cb822611a0050e5a50fc4b970eebd8d962
Reviewed-on: http://review.coreboot.org/8666
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
The nyan_blaze board will have different BCT .inc files, to be
added/updated later. GPIOs and some devicetree stuff may also differ.
BUG=None
TEST=Built nyan, nyan_big and nyan_blaze.
BRANCH=None
Original-Change-Id: I8b16fc71346cf973983aa046096b79cb83ad4bb6
Original-Signed-off-by: Tom Warren <twarren@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/190721
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Julius Werner <jwerner@chromium.org>
(cherry picked from commit bea753131e2247a90cc5359fa5f603026d66c7ce)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I435ae78da2f6c4f1a78fea8300b6285e52272535
Reviewed-on: http://review.coreboot.org/7453
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
