[PATCH 01/20] serial: stm32: adding fifo support
From: Bich HEMON <hidden>
Date: 2017-06-26 12:49:59
Also in:
linux-devicetree, linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
From: Bich Hemon <redacted> This patch adds fifo mode support for rx and tx. Signed-off-by: Gerald Baeza <redacted> --- drivers/tty/serial/stm32-usart.c | 3 +++ drivers/tty/serial/stm32-usart.h | 1 + 2 files changed, 4 insertions(+)
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 0338562..50948f6 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c@@ -453,6 +453,7 @@ static int stm32_startup(struct uart_port *port) return ret; val = USART_CR1_RXNEIE | USART_CR1_TE | USART_CR1_RE; + val |= USART_CR1_FIFOEN; stm32_set_bits(port, ofs->cr1, val); return 0;
@@ -467,6 +468,7 @@ static void stm32_shutdown(struct uart_port *port) val = USART_CR1_TXEIE | USART_CR1_RXNEIE | USART_CR1_TE | USART_CR1_RE; val |= BIT(cfg->uart_enable_bit); + val |= USART_CR1_FIFOEN; stm32_clr_bits(port, ofs->cr1, val); free_irq(port->irq, port);
@@ -496,6 +498,7 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios, cr1 = USART_CR1_TE | USART_CR1_RE | USART_CR1_RXNEIE; cr1 |= BIT(cfg->uart_enable_bit); + cr1 |= USART_CR1_FIFOEN; cr2 = 0; cr3 = 0;
diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h
index cd97ceb..9f0d0e8 100644
--- a/drivers/tty/serial/stm32-usart.h
+++ b/drivers/tty/serial/stm32-usart.h@@ -134,6 +134,7 @@ struct stm32_usart_info stm32f7_info = { #define USART_CR1_EOBIE BIT(27) /* F7 */ #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 */ /* USART_CR2 */ #define USART_CR2_ADD_MASK GENMASK(3, 0) /* F4 */
--
1.9.1