[PATCH v2 02/15] serial: core: add uart_iotype_mmio/legacy_io helper functions

[Hugo Villeneuve]

From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>

To help simplify code that check on the io type mode of the port.

Signed-off-by: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
---
Will also be used by future commit that add UPIO_BUS.
---
 drivers/tty/serial/serial_core.c | 28 ++++++++++++++++++++++++++++
 include/linux/serial_core.h      |  4 ++++
 2 files changed, 32 insertions(+)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 7354f8af4853d34e5e819c2887f287970c653b69..c177054f9515e1cb5a1e557c0dac096cb1cbd8cf 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1967,6 +1967,34 @@ static const char *uart_type(struct uart_port *port)
 	return str;
 }
 
+bool uart_iotype_mmio(enum uart_iotype iotype)
+{
+	switch (iotype) {
+	case UPIO_MEM:
+	case UPIO_MEM32:
+	case UPIO_AU:
+	case UPIO_TSI:
+	case UPIO_MEM32BE:
+	case UPIO_MEM16:
+		return true;
+	default:
+		return false;
+	}
+}
+EXPORT_SYMBOL_GPL(uart_iotype_mmio);
+
+bool uart_iotype_legacy_io(enum uart_iotype iotype)
+{
+	switch (iotype) {
+	case UPIO_PORT:
+	case UPIO_HUB6:
+		return true;
+	default:
+		return false;
+	}
+}
+EXPORT_SYMBOL_GPL(uart_iotype_legacy_io);
+
 #ifdef CONFIG_PROC_FS
 
 static void uart_line_info(struct seq_file *m, struct uart_state *state)
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 666430b4789977ae19641442b369eb1c773233f4..fc3f5ebe389658c197ffc105ce4ac11cacef59bb 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -1306,4 +1306,8 @@ static inline int uart_handle_break(struct uart_port *port)
 					 !((cflag) & CLOCAL))
 
 int uart_get_rs485_mode(struct uart_port *port);
+
+bool uart_iotype_mmio(enum uart_iotype iotype);
+bool uart_iotype_legacy_io(enum uart_iotype iotype);
+
 #endif /* LINUX_SERIAL_CORE_H */

-- 
2.47.3