[PATCH v2 20/25] tty: serial: samsung_tty: Use devm_ioremap_resource

Hector Martin
2021-02-15T12:23:51Z

This picks up the non-posted I/O mode needed for Apple platforms to
work properly.

This removes the request/release functions, which are no longer
necessary, since devm_ioremap_resource takes care of that already. Most
other drivers already do it this way, anyway.

Also fix a bug checking the return value, which should use IS_ERR().

Signed-off-by: Hector Martin <marcan@marcan.st>
---
drivers/tty/serial/samsung_tty.c | 25 +++----------------------
1 file changed, 3 insertions(+), 22 deletions(-)

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 821cd0e4f870..619bc4864e2a 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -1572,26 +1572,11 @@ static const char *s3c24xx_serial_type(struct uart_port *port)
}
}

-#define MAP_SIZE (0x100)
-
-static void s3c24xx_serial_release_port(struct uart_port *port)
-{
- release_mem_region(port->mapbase, MAP_SIZE);
-}
-
-static int s3c24xx_serial_request_port(struct uart_port *port)
-{
- const char *name = s3c24xx_serial_portname(port);
-
- return request_mem_region(port->mapbase, MAP_SIZE, name) ? 0 : -EBUSY;
-}
-
static void s3c24xx_serial_config_port(struct uart_port *port, int flags)
{
struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);

- if (flags & UART_CONFIG_TYPE &&
- s3c24xx_serial_request_port(port) == 0)
+ if (flags & UART_CONFIG_TYPE)
port->type = info->port_type;
}

@@ -1644,8 +1629,6 @@ static struct uart_ops s3c24xx_serial_ops = {
.shutdown = s3c24xx_serial_shutdown,
.set_termios = s3c24xx_serial_set_termios,
.type = s3c24xx_serial_type,
- .release_port = s3c24xx_serial_release_port,
- .request_port = s3c24xx_serial_request_port,
.config_port = s3c24xx_serial_config_port,
.verify_port = s3c24xx_serial_verify_port,
#if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_CONSOLE_POLL)
@@ -1667,8 +1650,6 @@ static const struct uart_ops s3c64xx_serial_ops = {
.shutdown = s3c64xx_serial_shutdown,
.set_termios = s3c24xx_serial_set_termios,
.type = s3c24xx_serial_type,
- .release_port = s3c24xx_serial_release_port,
- .request_port = s3c24xx_serial_request_port,
.config_port = s3c24xx_serial_config_port,
.verify_port = s3c24xx_serial_verify_port,
#if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_CONSOLE_POLL)
@@ -1926,8 +1907,8 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,

dev_dbg(port->dev, "resource %pR)\n", res);

- port->membase = devm_ioremap(port->dev, res->start, resource_size(res));
- if (!port->membase) {
+ port->membase = devm_ioremap_resource(port->dev, res);
+ if (IS_ERR(port->membase)) {
dev_err(port->dev, "failed to remap controller address\n");
return -EBUSY;
}
--
2.30.0