mfd: at91-usart: Add platform dependency

It doesn't make sense to present option MFD_AT91_USART by default if
not building an AT91 kernel, as the drivers which depend on it are
not available.

Fixes: 7d3aa342cef7 ("mfd: at91-usart: Add MFD driver for USART")
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 8c5dfdc..f461460 100644 (file)
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -102,6 +102,7 @@ config MFD_AAT2870_CORE
 config MFD_AT91_USART
        tristate "AT91 USART Driver"
        select MFD_CORE
+       depends on ARCH_AT91 || COMPILE_TEST
        help
          Select this to get support for AT91 USART IP. This is a wrapper
          over at91-usart-serial driver and usart-spi-driver. Only one function