From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bich HEMON Subject: [PATCH 01/20] serial: stm32: adding fifo support Date: Mon, 26 Jun 2017 12:49:09 +0000 Message-ID: <1498481318-1894-2-git-send-email-bich.hemon@st.com> References: <1498481318-1894-1-git-send-email-bich.hemon@st.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1498481318-1894-1-git-send-email-bich.hemon@st.com> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Greg Kroah-Hartman , Rob Herring , Mark Rutland , Maxime Coquelin , Alexandre TORGUE , Jiri Slaby , "linux-serial@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" Cc: Bich HEMON List-Id: devicetree@vger.kernel.org From: Bich Hemon This patch adds fifo mode support for rx and tx. Signed-off-by: Gerald Baeza --- 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