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serial: stm32: fix uart enable management 

Signed-off-by: Gerald Baeza <gerald.baeza@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexandre TORGUE 2016-09-15 18:42:42 +02:00 committed by Greg Kroah-Hartman
parent 01d32d7161
commit 87f1f809c9
1 changed files with 5 additions and 1 deletions
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6
drivers/tty/serial/stm32-usart.c
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@ -461,9 +461,11 @@ static void stm32_shutdown(struct uart_port *port)
{
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
struct stm32_usart_config *cfg = &stm32_port->info->cfg;
u32 val;
val = USART_CR1_TXEIE | USART_CR1_RXNEIE | USART_CR1_TE | USART_CR1_RE;
val |= BIT(cfg->uart_enable_bit);
stm32_clr_bits(port, ofs->cr1, val);
free_irq(port->irq, port);
@ -923,6 +925,7 @@ static void stm32_console_write(struct console *co, const char *s, unsigned cnt)
struct uart_port *port = &stm32_ports[co->index].port;
struct stm32_port *stm32_port = to_stm32_port(port);
struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
struct stm32_usart_config *cfg = &stm32_port->info->cfg;
unsigned long flags;
u32 old_cr1, new_cr1;
int locked = 1;
@ -935,9 +938,10 @@ static void stm32_console_write(struct console *co, const char *s, unsigned cnt)
else
spin_lock(&port->lock);
/* Save and disable interrupts */
/* Save and disable interrupts, enable the transmitter */
old_cr1 = readl_relaxed(port->membase + ofs->cr1);
new_cr1 = old_cr1 & ~USART_CR1_IE_MASK;
new_cr1 |= USART_CR1_TE | BIT(cfg->uart_enable_bit);
writel_relaxed(new_cr1, port->membase + ofs->cr1);
uart_console_write(port, s, cnt, stm32_console_putchar);