[03/23] tty: serial/samsung: prepare for common clock API

Commit Message

Arnd Bergmann March 5, 2013, 5:42 p.m. UTC

With the common clock interface, there is no way to
provide the "clock_source" sysfs attribute for the
samsung serial ports. Given that this file was
purely informational and had fixed contents, we have
reason to believe that no user space programs
were relying on it.

The sysfs file is not documented in the ABI docs.

Signed-off-by: Arnd Bergmann <[e-mail]>
---
 drivers/tty/serial/samsung.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 2769a38..603f3f3 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1179,6 +1179,7 @@  static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
 	return 0;
 }
 
+#ifdef CONFIG_SAMSUNG_CLOCK
 static ssize_t s3c24xx_serial_show_clksrc(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf)
@@ -1194,7 +1195,7 @@  static ssize_t s3c24xx_serial_show_clksrc(struct device *dev,
 }
 
 static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL);
-
+#endif
 
 /* Device driver serial port probe */
 
@@ -1252,9 +1253,11 @@  static int s3c24xx_serial_probe(struct platform_device *pdev)
 	uart_add_one_port(&s3c24xx_uart_drv, &ourport->port);
 	platform_set_drvdata(pdev, &ourport->port);
 
+#ifdef CONFIG_SAMSUNG_CLOCK
 	ret = device_create_file(&pdev->dev, &dev_attr_clock_source);
 	if (ret < 0)
 		dev_err(&pdev->dev, "failed to add clock source attr.\n");
+#endif
 
 	ret = s3c24xx_serial_cpufreq_register(ourport);
 	if (ret < 0)
@@ -1272,7 +1275,9 @@  static int s3c24xx_serial_remove(struct platform_device *dev)
 
 	if (port) {
 		s3c24xx_serial_cpufreq_deregister(to_ourport(port));
+#ifdef CONFIG_SAMSUNG_CLOCK
 		device_remove_file(&dev->dev, &dev_attr_clock_source);
+#endif
 		uart_remove_one_port(&s3c24xx_uart_drv, port);
 	}