diff options
| author | Scott Collyer <scollyer@google.com> | 2020-06-17 20:22:56 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-03-04 21:18:11 +0000 |
| commit | 22c4439064728d0d83e708724c3f3da5fd5e65b3 (patch) | |
| tree | 38c8471d10351e36e0be7238d315412017c01297 /chip/stm32/system.c | |
| parent | 5906ecf9d006259ed51afddc3ada0469d08253a7 (diff) | |
| download | chrome-ec-22c4439064728d0d83e708724c3f3da5fd5e65b3.tar.gz | |
stm32g4: Add USB endpoint support
This CL enables USB-EP for the STM32G4 family. It also fixes backup
domain register access issues which are required for fw updates via
USB.
BUG=b:148493929
BRANCH=None
TEST=Verified on quiche that STM32G4 enumerates as an USB endpoint and
can be used successfully with fwupd.
Signed-off-by: Scott Collyer <scollyer@google.com>
Change-Id: I75e6b6e70e9ca2589ace76f0aa0facadd9e94142
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2268139
Tested-by: Scott Collyer <scollyer@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Diana Z <dzigterman@chromium.org>
Commit-Queue: Scott Collyer <scollyer@chromium.org>
Diffstat (limited to 'chip/stm32/system.c')
| -rw-r--r-- | chip/stm32/system.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/chip/stm32/system.c b/chip/stm32/system.c index 0304c7b3be..42525deb48 100644 --- a/chip/stm32/system.c +++ b/chip/stm32/system.c @@ -280,6 +280,13 @@ void system_pre_init(void) /* Wait for LSI to be ready */ while (!(STM32_RCC_CSR & BIT(1))) ; + +#if defined(CHIP_FAMILY_STM32G4) + /* Make sure PWR clock is enabled */ + STM32_RCC_APB1ENR1 |= STM32_RCC_APB1ENR1_PWREN; + /* Enable access to backup domain registers */ + STM32_PWR_CR1 |= STM32_PWR_CR1_DBP; +#endif /* re-configure RTC if needed */ #ifdef CHIP_FAMILY_STM32L if ((STM32_RCC_CSR & 0x00C30000) != 0x00420000) { @@ -399,7 +406,7 @@ void system_reset(int flags) * use this for hard reset. */ STM32_FLASH_CR |= FLASH_CR_OBL_LAUNCH; -#elif defined(CHIP_FAMILY_STM32L4) +#elif defined(CHIP_FAMILY_STM32L4) || defined(CHIP_FAMILY_STM32G4) STM32_FLASH_KEYR = FLASH_KEYR_KEY1; STM32_FLASH_KEYR = FLASH_KEYR_KEY2; STM32_FLASH_OPTKEYR = FLASH_OPTKEYR_KEY1; |