diff options
| author | Erwan Le Ray <erwan.leray@foss.st.com> | 2021-03-04 17:22:57 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-14 09:50:07 +0200 |
| commit | a44d6acfa7dffdf37337d02bdbbfc981f357d69b (patch) | |
| tree | d2f9e52817fd926cee6b1e9a3cc106be1f305f70 /drivers/tty | |
| parent | b5e8f0adaec1899ba91c46498adc13c96fcb3663 (diff) | |
serial: stm32: fix startup by enabling usart for reception
[ Upstream commit f4518a8a75f5be1a121b0c95ad9c6b1eb27d920e ]
RX is configured, but usart is not enabled in startup function.
Kernel documentation specifies that startup should enable the port for
reception.
Fix the startup by enabling usart for reception.
Fixes: 84872dc448fe ("serial: stm32: add RX and TX FIFO flush")
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20210304162308.8984-3-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index 1f7fe285bb1f..909a0d991ba1 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -633,6 +633,7 @@ static int stm32_usart_startup(struct uart_port *port) { struct stm32_port *stm32_port = to_stm32_port(port); const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs; + const struct stm32_usart_config *cfg = &stm32_port->info->cfg; const char *name = to_platform_device(port->dev)->name; u32 val; int ret; @@ -657,7 +658,7 @@ static int stm32_usart_startup(struct uart_port *port) } /* RX FIFO enabling */ - val = stm32_port->cr1_irq | USART_CR1_RE; + val = stm32_port->cr1_irq | USART_CR1_RE | BIT(cfg->uart_enable_bit); if (stm32_port->fifoen) val |= USART_CR1_FIFOEN; stm32_usart_set_bits(port, ofs->cr1, val); |