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| author | Bich HEMON <bich.hemon@st.com> | 2018-03-12 09:50:05 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-14 13:35:37 +0100 |
| commit | 1bcda09d291081a7732fcaa9d1745312404a4e36 (patch) | |
| tree | b339ce40f103539e7c94b1dddc70bf5f91b4b2ad /drivers/tty/serial/stm32-usart.h | |
| parent | 241672cb4b166da3d2f4deb66bac335f44e04d4a (diff) | |
| download | linux-1bcda09d291081a7732fcaa9d1745312404a4e36.tar.gz linux-1bcda09d291081a7732fcaa9d1745312404a4e36.tar.bz2 linux-1bcda09d291081a7732fcaa9d1745312404a4e36.zip | |
serial: stm32: add support for RS485 hardware control mode
Implement Driver Enable signal (DE) to activate the transmission mode
of the external transceiver.
Signed-off-by: Yves Coppeaux <yves.coppeaux@st.com>
Signed-off-by: Bich Hemon <bich.hemon@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/stm32-usart.h')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h index 2294d0f05872..6f294e280ea3 100644 --- a/drivers/tty/serial/stm32-usart.h +++ b/drivers/tty/serial/stm32-usart.h @@ -135,6 +135,7 @@ struct stm32_usart_info stm32h7_info = { #define USART_BRR_DIV_F_MASK GENMASK(3, 0) #define USART_BRR_DIV_M_MASK GENMASK(15, 4) #define USART_BRR_DIV_M_SHIFT 4 +#define USART_BRR_04_R_SHIFT 1 /* USART_CR1 */ #define USART_CR1_SBK BIT(0) @@ -162,6 +163,8 @@ struct stm32_usart_info stm32h7_info = { #define USART_CR1_M1 BIT(28) /* F7 */ #define USART_CR1_IE_MASK (GENMASK(8, 4) | BIT(14) | BIT(26) | BIT(27)) #define USART_CR1_FIFOEN BIT(29) /* H7 */ +#define USART_CR1_DEAT_SHIFT 21 +#define USART_CR1_DEDT_SHIFT 16 /* USART_CR2 */ #define USART_CR2_ADD_MASK GENMASK(3, 0) /* F4 */ |