Add mapsize, bugs, and divisor latch read/write functions
(->dl_read/write()) into plat_serial8250_port to carry the setup
necessary for RT288x/Au1xxx devices over to uart port.
Document the added members with kerneldoc style but do not enable
kerneldoc yet as there are many fields which remain undocumented.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
---
drivers/tty/serial/8250/8250_core.c | 4 ++++
include/linux/serial_8250.h | 19 +++++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 13bf535eedcd..21b15b130d12 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -822,12 +822,16 @@ static int serial8250_probe(struct platform_device *dev)
uart.port.iotype = p->iotype;
uart.port.flags = p->flags;
uart.port.mapbase = p->mapbase;
+ uart.port.mapsize = p->mapsize;
uart.port.hub6 = p->hub6;
uart.port.has_sysrq = p->has_sysrq;
uart.port.private_data = p->private_data;
uart.port.type = p->type;
+ uart.bugs = p->bugs;
uart.port.serial_in = p->serial_in;
uart.port.serial_out = p->serial_out;
+ uart.dl_read = p->dl_read;
+ uart.dl_write = p->dl_write;
uart.port.handle_irq = p->handle_irq;
uart.port.handle_break = p->handle_break;
uart.port.set_termios = p->set_termios;
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index d64e7bbe1f2f..82cd8d90a040 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -11,13 +11,29 @@
#include <linux/serial_reg.h>
#include <linux/platform_device.h>
+struct uart_8250_port;
+
/*
* This is the platform device platform_data structure
+ *
+ * @mapsize: Port size for ioremap()
+ * @bugs: Port bugs
+ *
+ * @dl_read: ``u32 ()(struct uart_8250_port *up)``
+ *
+ * UART divisor latch read.
+ *
+ * @dl_write: ``void ()(struct uart_8250_port *up, u32 value)``
+ *
+ * Write @value into UART divisor latch.
+ *
+ * Locking: Caller holds port's lock.
*/
struct plat_serial8250_port {
unsigned long iobase; /* io base address */
void __iomem *membase; /* ioremap cookie or NULL */
resource_size_t mapbase; /* resource base */
+ resource_size_t mapsize;
unsigned int uartclk; /* UART clock rate */
unsigned int irq; /* interrupt number */
unsigned long irqflags; /* request_irq flags */
@@ -28,8 +44,11 @@ struct plat_serial8250_port {
unsigned char has_sysrq; /* supports magic SysRq */
unsigned int type; /* If UPF_FIXED_TYPE */
upf_t flags; /* UPF_* flags */
+ unsigned short bugs; /* port bugs */
unsigned int (*serial_in)(struct uart_port *, int);
void (*serial_out)(struct uart_port *, int, int);
+ u32 (*dl_read)(struct uart_8250_port *up);
+ void (*dl_write)(struct uart_8250_port *up, u32 value);
void (*set_termios)(struct uart_port *,
struct ktermios *new,
const struct ktermios *old);
--
2.30.2
