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authorJulius Werner <jwerner@chromium.org>2014-09-24 15:40:49 -0700
committerPatrick Georgi <pgeorgi@google.com>2015-04-10 11:57:33 +0200
commiteaa9c4596b083ee1d1a48c5e7632abdb5b7e5297 (patch)
treed3294fcdf788dbd85f84e4fc2806d1443cf575f7 /src/soc/samsung
parente9e0eec4faa46ff3879c3350000c4a20b9053270 (diff)
downloadcoreboot-eaa9c4596b083ee1d1a48c5e7632abdb5b7e5297.tar.xz
gpio: Extend common GPIO header, simplify function names
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>
Diffstat (limited to 'src/soc/samsung')
-rw-r--r--src/soc/samsung/exynos5250/include/soc/gpio.h2
-rw-r--r--src/soc/samsung/exynos5420/include/soc/gpio.h2
2 files changed, 4 insertions, 0 deletions
diff --git a/src/soc/samsung/exynos5250/include/soc/gpio.h b/src/soc/samsung/exynos5250/include/soc/gpio.h
index bbe97a1048..398e7b02de 100644
--- a/src/soc/samsung/exynos5250/include/soc/gpio.h
+++ b/src/soc/samsung/exynos5250/include/soc/gpio.h
@@ -22,6 +22,8 @@
#include <soc/cpu.h>
+/* TODO: Align interface to src/include/gpio.h! */
+
struct gpio_bank {
unsigned int con;
unsigned int dat;
diff --git a/src/soc/samsung/exynos5420/include/soc/gpio.h b/src/soc/samsung/exynos5420/include/soc/gpio.h
index 1c6a77b7c4..ee34bc3abf 100644
--- a/src/soc/samsung/exynos5420/include/soc/gpio.h
+++ b/src/soc/samsung/exynos5420/include/soc/gpio.h
@@ -22,6 +22,8 @@
#include <soc/cpu.h>
+/* TODO: Align interface to src/include/gpio.h! */
+
struct gpio_bank {
unsigned int con;
unsigned int dat;