diff options
Diffstat (limited to 'target/linux/generic/backport-4.14/950-tty-serial-exar-generalize-rs485-setup.patch')
| -rw-r--r-- | target/linux/generic/backport-4.14/950-tty-serial-exar-generalize-rs485-setup.patch | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/target/linux/generic/backport-4.14/950-tty-serial-exar-generalize-rs485-setup.patch b/target/linux/generic/backport-4.14/950-tty-serial-exar-generalize-rs485-setup.patch deleted file mode 100644 index c4c4cfcb71..0000000000 --- a/target/linux/generic/backport-4.14/950-tty-serial-exar-generalize-rs485-setup.patch +++ /dev/null @@ -1,75 +0,0 @@ -From 9d9398944488cd3a3e1e0912b26fbc4d5921e547 Mon Sep 17 00:00:00 2001 -From: Daniel Golle <daniel@makrotopia.org> -Date: Mon, 4 Jun 2018 23:33:07 +0200 -Subject: [PATCH] tty: serial: exar: generalize RS485 setup - -Move the non-board-specific part of the RS485 initialization from -iot2040_rs485_config function to a new generic function used also for -other boards. -This allows using TIOCGRS485 and TIOCSRS485 on boards (such as mPCIe -serial IO modules) which are hard-wired to RS485 or have jumpers for -their configurations. - -Signed-off-by: Daniel Golle <daniel@makrotopia.org> -Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - drivers/tty/serial/8250/8250_exar.c | 38 +++++++++++++++++++---------- - 1 file changed, 25 insertions(+), 13 deletions(-) - ---- a/drivers/tty/serial/8250/8250_exar.c -+++ b/drivers/tty/serial/8250/8250_exar.c -@@ -293,8 +293,32 @@ static int xr17v35x_register_gpio(struct - return 0; - } - -+static int generic_rs485_config(struct uart_port *port, -+ struct serial_rs485 *rs485) -+{ -+ bool is_rs485 = !!(rs485->flags & SER_RS485_ENABLED); -+ u8 __iomem *p = port->membase; -+ u8 value; -+ -+ value = readb(p + UART_EXAR_FCTR); -+ if (is_rs485) -+ value |= UART_FCTR_EXAR_485; -+ else -+ value &= ~UART_FCTR_EXAR_485; -+ -+ writeb(value, p + UART_EXAR_FCTR); -+ -+ if (is_rs485) -+ writeb(UART_EXAR_RS485_DLY(4), p + UART_MSR); -+ -+ port->rs485 = *rs485; -+ -+ return 0; -+} -+ - static const struct exar8250_platform exar8250_default_platform = { - .register_gpio = xr17v35x_register_gpio, -+ .rs485_config = generic_rs485_config, - }; - - static int iot2040_rs485_config(struct uart_port *port, -@@ -327,19 +351,7 @@ static int iot2040_rs485_config(struct u - value |= mode; - writeb(value, p + UART_EXAR_MPIOLVL_7_0); - -- value = readb(p + UART_EXAR_FCTR); -- if (is_rs485) -- value |= UART_FCTR_EXAR_485; -- else -- value &= ~UART_FCTR_EXAR_485; -- writeb(value, p + UART_EXAR_FCTR); -- -- if (is_rs485) -- writeb(UART_EXAR_RS485_DLY(4), p + UART_MSR); -- -- port->rs485 = *rs485; -- -- return 0; -+ return generic_rs485_config(port, rs485); - } - - static const struct property_entry iot2040_gpio_properties[] = { |