[PATCH -next] tty: serial: atmel: driver depends on COMMON_CLK

[Randy Dunlap <rdunlap@infradead.org>]

Since atmel_serial.c uses interfaces that are provided by
the COMMON_CLK Kconfig symbol, the driver should depend on
COMMON_CLK to prevent build errors.

ld: drivers/tty/serial/atmel_serial.o: in function `atmel_serial_pm':
atmel_serial.c:(.text+0x1553): undefined reference to `__clk_is_enabled'
ld: drivers/tty/serial/atmel_serial.o: in function `atmel_set_termios':
atmel_serial.c:(.text+0x1dfe): undefined reference to `__clk_is_enabled'

Fixes: 5e3ce1f26129 ("tty: serial: atmel: Make the driver aware of the existence of GCLK")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Sergiu Moga <sergiu.moga@microchip.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Richard Genoud <richard.genoud@gmail.com>
Cc: linux-serial@vger.kernel.org
Cc: Jiri Slaby <jirislaby@kernel.org>
---
 drivers/tty/serial/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -128,6 +128,7 @@ config SERIAL_SB1250_DUART_CONSOLE
 config SERIAL_ATMEL
 	bool "AT91 on-chip serial port support"
 	depends on ARCH_AT91 || COMPILE_TEST
+	depends on COMMON_CLK
 	select SERIAL_CORE
 	select SERIAL_MCTRL_GPIO if GPIOLIB
 	select MFD_AT91_USART