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tty: serial/samsung: prepare for common clock API 

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 <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2013-04-11 02:04:47 +02:00 committed by Greg Kroah-Hartman
parent 39f610e40e
commit 17efd2b786
1 changed files with 6 additions and 1 deletions
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7
drivers/tty/serial/samsung.c
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@ -1183,6 +1183,7 @@ 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)
@ -1198,7 +1199,7 @@ 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 */
@ -1256,9 +1257,11 @@ 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)
@ -1276,7 +1279,9 @@ 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);
}