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| author | CHLin <CHLIN56@nuvoton.com> | 2019-06-13 11:01:18 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2019-07-24 05:50:26 +0000 |
| commit | 26d7adb2fd72635cde56199b025c200a125dcb78 (patch) | |
| tree | 0b6c70777fc40dea00884ada9ccfebaf9b8692ca /include/gpio.wrap | |
| parent | b872f26ce6b97f62175c835871fbb7ead6b8455b (diff) | |
| download | chrome-ec-26d7adb2fd72635cde56199b025c200a125dcb78.tar.gz | |
IO_Expander: introduce the common interface of IO expander
Implement the common code to provide a friendly interface to control the
IOs of IO expander. It adopts a similar concept to GPIO.
1. Define the IO expander IO in gpio.inc by the format:
IOEX(name, EXPIN(ioex, port, offset), flags)
- name: the name of this IO pin
- EXPIN(ioex, port, offset)
- ioex: the IO expander port (defined in board.c) this IO
pin belongs to.
- port: the port number in the IO expander chip.
- offset: the bit offset in the port above.
- flags: the same as the flags of GPIO.
2. The following APIs are supported:
1. ioex_get_flags_by_mask
2. ioex_set_flags_by_mask
3. ioex_get_flags
4. ioex_set_flags
5. ioex_get_level
6. ioex_set_level
7. ioex_init
3. The following console commands are supported:
1. ioexget [IO_EXPANDER_PIN_NAME]
2. ioexset IO_EXPANDER_PIN_NAME 0/1
BRANCH=none
BUG=none
TEST=No error for "make buildall"
TEST=Apply this and related CLs, manually test each API, make sure each
function works correctly with IO expander chip (NCT3807/NCT3808.)
Change-Id: I79c9813abccc67d5554e2ceb5c119dcf549b7dce
Signed-off-by: CHLin <CHLIN56@nuvoton.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1657858
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Commit-Queue: CH Lin <chlin56@nuvoton.com>
Commit-Queue: Aseda Aboagye <aaboagye@chromium.org>
Tested-by: CH Lin <chlin56@nuvoton.com>
Diffstat (limited to 'include/gpio.wrap')
| -rw-r--r-- | include/gpio.wrap | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/gpio.wrap b/include/gpio.wrap index e2bdabda7b..1e018f2ed2 100644 --- a/include/gpio.wrap +++ b/include/gpio.wrap @@ -114,6 +114,10 @@ #define UNIMPLEMENTED_RW(name) UNIMPLEMENTED(name) #endif +#ifndef IOEX +#define IOEX(name, expin, flags) +#endif + #include "gpio.inc" /* @@ -131,3 +135,5 @@ #undef UNIMPLEMENTED #undef UNIMPLEMENTED_RO #undef UNIMPLEMENTED_RW + +#undef IOEX |