diff options
| -rw-r--r-- | board/samus_pd/usb_pd_config.h | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/board/samus_pd/usb_pd_config.h b/board/samus_pd/usb_pd_config.h index 60925b3077..c6ec62e2cf 100644 --- a/board/samus_pd/usb_pd_config.h +++ b/board/samus_pd/usb_pd_config.h @@ -162,19 +162,21 @@ static inline void pd_tx_disable(int port, int polarity) /* we know the plug polarity, do the right configuration */ static inline void pd_select_polarity(int port, int polarity) { + uint32_t val = STM32_COMP_CSR; + + /* Use window mode so that COMP1 and COMP2 share non-inverting input */ + val |= STM32_COMP_CMP1EN | STM32_COMP_CMP2EN | STM32_COMP_WNDWEN; + if (port == 0) { /* use the right comparator inverted input for COMP1 */ - STM32_COMP_CSR = (STM32_COMP_CSR & ~STM32_COMP_CMP1INSEL_MASK) - | STM32_COMP_CMP1EN - | (polarity ? STM32_COMP_CMP1INSEL_INM4 - : STM32_COMP_CMP1INSEL_INM6); + STM32_COMP_CSR = (val & ~STM32_COMP_CMP1INSEL_MASK) | + (polarity ? STM32_COMP_CMP1INSEL_INM4 + : STM32_COMP_CMP1INSEL_INM6); } else { /* use the right comparator inverted input for COMP2 */ - /* use window mode on COMP2 to use COMP1 non-inverting input */ - STM32_COMP_CSR = (STM32_COMP_CSR & ~STM32_COMP_CMP2INSEL_MASK) - | STM32_COMP_CMP2EN | STM32_COMP_WNDWEN - | (polarity ? STM32_COMP_CMP2INSEL_INM5 - : STM32_COMP_CMP2INSEL_INM6); + STM32_COMP_CSR = (val & ~STM32_COMP_CMP2INSEL_MASK) | + (polarity ? STM32_COMP_CMP2INSEL_INM5 + : STM32_COMP_CMP2INSEL_INM6); } } |