ARM: imx: Add EPIT support

The Enhanced Periodic Interrupt Timer (EPIT) is found on newer
i.MX SoCs and can be used as an alternative system timer.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/Kconfig b/arch/arm/plat-mxc/Kconfig
index 6785db4179b8..95f8d614d4fc 100644
--- a/arch/arm/plat-mxc/Kconfig
+++ b/arch/arm/plat-mxc/Kconfig
@@ -92,6 +92,18 @@ config MXC_DEBUG_BOARD
           data/address de-multiplexing and decode, signal level shift,
           interrupt control and various board functions.
 
+config HAVE_EPIT
+        bool
+
+config MXC_USE_EPIT
+        bool "Use EPIT instead of GPT"
+        depends on HAVE_EPIT
+        help
+          Use EPIT as the system timer on systems that have it. Normally you
+          don't have a reason to do so as the EPIT has the same features and
+          uses the same clocks as the GPT. Anyway, on some systems the GPT
+          may be in use for other purposes.
+
 config MXC_ULPI
         bool