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| author | Ting Shen <phoenixshen@google.com> | 2019-12-16 17:44:57 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-01-17 12:31:42 +0000 |
| commit | 45427c38df049e4506bf42e17d1ccfd303e1380c (patch) | |
| tree | d0ceab265367bcfb1e9ebc2d47222749710fe127 /board/kodama | |
| parent | 166c22d05730de961b894d954116439d6ff219e7 (diff) | |
| download | chrome-ec-45427c38df049e4506bf42e17d1ccfd303e1380c.tar.gz | |
i2c: Support changing I2C bus speed at runtime
Add a i2c_set_freq function and let chip drivers add their underlying
implementation.
Also implemented on stm32f0.
BUG=b:143677811,b:78189419
TEST=1) make
2) On kodama, call i2c_set_freq(1, 100) during init.
verify the bus is configured to 100kbps in kodama rev 1
BRANCH=kukui
Change-Id: Iebb5baacf098b3e5649a4bd8ca14acf097d39693
Signed-off-by: Ting Shen <phoenixshen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1969245
Reviewed-by: Matthew Blecker <matthewb@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Commit-Queue: Ting Shen <phoenixshen@chromium.org>
Tested-by: Ting Shen <phoenixshen@chromium.org>
Diffstat (limited to 'board/kodama')
| -rw-r--r-- | board/kodama/board.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/board/kodama/board.c b/board/kodama/board.c index 388e91d932..8839c77a54 100644 --- a/board/kodama/board.c +++ b/board/kodama/board.c @@ -23,7 +23,6 @@ #include "gpio.h" #include "hooks.h" #include "host_command.h" -#include "i2c-stm32f0.h" #include "i2c.h" #include "lid_switch.h" #include "power.h" @@ -64,7 +63,8 @@ BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT); /* I2C ports */ const struct i2c_port_t i2c_ports[] = { {"typec", 0, 400, GPIO_I2C1_SCL, GPIO_I2C1_SDA}, - {"other", 1, 400, GPIO_I2C2_SCL, GPIO_I2C2_SDA}, + {"other", 1, 400, GPIO_I2C2_SCL, GPIO_I2C2_SDA, + .flags = I2C_PORT_FLAG_DYNAMIC_SPEED}, }; const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports); @@ -271,12 +271,8 @@ DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT); */ static void board_i2c_init(void) { - if (board_get_version() < 2) { - const struct i2c_port_t i2c_port = { - "other", 1, 100, GPIO_I2C2_SCL, GPIO_I2C2_SDA, - }; - stm32f0_i2c_init_port(&i2c_port); - } + if (board_get_version() < 2) + i2c_set_freq(1, I2C_FREQ_100KHZ); } DECLARE_HOOK(HOOK_INIT, board_i2c_init, HOOK_PRIO_INIT_I2C); |