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| author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2013-09-19 15:20:25 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-09-24 09:21:40 +0200 |
| commit | 568e628974d287bfea6c86babdd21e3f9779beda (patch) | |
| tree | e410684cc358577fe8df3a52860b22e37ebff832 | |
| parent | 9adf567789b919d206f38fd2229704b67b7cb89c (diff) | |
| download | barebox-568e628974d287bfea6c86babdd21e3f9779beda.tar.gz barebox-568e628974d287bfea6c86babdd21e3f9779beda.tar.xz | |
atmel_serial: add rs485 support
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | drivers/serial/atmel.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/serial/atmel.c b/drivers/serial/atmel.c index 89c141eafe..40945c9282 100644 --- a/drivers/serial/atmel.c +++ b/drivers/serial/atmel.c @@ -362,6 +362,32 @@ static int atmel_serial_setbaudrate(struct console_device *cdev, int baudrate) return 0; } +static int atmel_serial_set_mode(struct console_device *cdev, enum console_mode mode) +{ + struct atmel_uart_port *uart = to_atmel_uart_port(cdev); + u32 mr; + u8 m; + + mr = readl(uart->base + USART3_MR); + mr &= ~0xf; + + switch (mode) { + case CONSOLE_MODE_NORMAL: + m = USART3_USART_MODE_NORMAL; + break; + case CONSOLE_MODE_RS485: + m = USART3_USART_MODE_RS485; + break; + default: + return -EINVAL; + } + + mr |= USART3_BF(USART_MODE, m); + writel(mr, uart->base + USART3_MR); + + return 0; +} + /* * Initialise the serial port with the given baudrate. The settings * are always 8 data bits, no parity, 1 stop bit, no start bits. @@ -404,6 +430,7 @@ static int atmel_serial_probe(struct device_d *dev) cdev->putc = atmel_serial_putc; cdev->getc = atmel_serial_getc; cdev->setbrg = atmel_serial_setbaudrate; + cdev->set_mode = atmel_serial_set_mode; atmel_serial_init_port(cdev); |