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serial: 8250: Document uart_8250_port's ->dl_read/write()

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Add documentation for the struct uart_8250_port divisor latch function
pointers. Documentation is in kernel doc format but don't enable kernel
doc yet as many other fields remain undocumented.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230511121029.13128-3-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ilpo Järvinen 2023-05-11 15:10:25 +03:00 committed by Greg Kroah-Hartman
parent b245aa0cc5
commit 98658ae8f3
1 changed files with 10 additions and 1 deletions
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11
include/linux/serial_8250.h
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@ -90,8 +90,17 @@ struct uart_8250_em485 {
* their own 8250 ports without registering their own
* platform device. Using these will make your driver
* dependent on the 8250 driver.
*
* @dl_read: ``u32 ()(struct uart_8250_port *port)``
*
* UART divisor latch read.
*
* @dl_write: ``void ()(struct uart_8250_port *port, u32 value)``
*
* Write @value into UART divisor latch.
*
* Locking: Caller holds port's lock.
*/
struct uart_8250_port {
struct uart_port port;
struct timer_list timer; /* "no irq" timer */