5.10-stable review patch. If anyone has any objections, please let me know.
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From: Ilpo Järvinen ilpo.jarvinen@linux.intel.com
[ Upstream commit 59c221f8e1269278161313048c71929c9950b2c4 ]
Add information on supported serial_rs485 features.
Signed-off-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Link: https://lore.kernel.org/r/20220606100433.13793-8-ilpo.jarvinen@linux.intel.c... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Stable-dep-of: 0c2a5f471ce5 ("serial: 8250_exar: Set missing rs485_supported flag") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/tty/serial/8250/8250_exar.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c index 5c2adf14049b..19de9f535c67 100644 --- a/drivers/tty/serial/8250/8250_exar.c +++ b/drivers/tty/serial/8250/8250_exar.c @@ -123,6 +123,7 @@ struct exar8250;
struct exar8250_platform { int (*rs485_config)(struct uart_port *, struct serial_rs485 *); + const struct serial_rs485 *rs485_supported; int (*register_gpio)(struct pci_dev *, struct uart_8250_port *); };
@@ -423,9 +424,14 @@ static int generic_rs485_config(struct uart_port *port, return 0; }
+static const struct serial_rs485 generic_rs485_supported = { + .flags = SER_RS485_ENABLED, +}; + static const struct exar8250_platform exar8250_default_platform = { .register_gpio = xr17v35x_register_gpio, .rs485_config = generic_rs485_config, + .rs485_supported = &generic_rs485_supported, };
static int iot2040_rs485_config(struct uart_port *port, @@ -461,6 +467,10 @@ static int iot2040_rs485_config(struct uart_port *port, return generic_rs485_config(port, rs485); }
+static const struct serial_rs485 iot2040_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RX_DURING_TX | SER_RS485_TERMINATE_BUS, +}; + static const struct property_entry iot2040_gpio_properties[] = { PROPERTY_ENTRY_U32("exar,first-pin", 10), PROPERTY_ENTRY_U32("ngpios", 1), @@ -485,6 +495,7 @@ static int iot2040_register_gpio(struct pci_dev *pcidev,
static const struct exar8250_platform iot2040_platform = { .rs485_config = iot2040_rs485_config, + .rs485_supported = &iot2040_rs485_supported, .register_gpio = iot2040_register_gpio, };
@@ -522,6 +533,7 @@ pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev,
port->port.uartclk = baud * 16; port->port.rs485_config = platform->rs485_config; + port->port.rs485_supported = platform->rs485_supported;
/* * Setup the UART clock for the devices on expansion slot to