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serial: 8250: Change dl_read/write to handle value as u32

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Divisor latch read/write functions currently handle the value is int.
As the value is related to HW context, u32 makes much more sense than a
signed type.

While at it, name the parameters in the callback signature.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230511121029.13128-2-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ilpo Järvinen
2023-05-11 15:10:24 +03:00
committed by Greg Kroah-Hartman
parent 9d86719f87
commit b245aa0cc5
6 changed files with 14 additions and 14 deletions
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4
include/linux/serial_8250.h
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@@ -129,8 +129,8 @@ struct uart_8250_port {
const struct uart_8250_ops *ops;
/* 8250 specific callbacks */
int (*dl_read)(struct uart_8250_port *);
void (*dl_write)(struct uart_8250_port *, int);
u32 (*dl_read)(struct uart_8250_port *up);
void (*dl_write)(struct uart_8250_port *up, u32 value);
struct uart_8250_em485 *em485;
void (*rs485_start_tx)(struct uart_8250_port *);