memory: emif: add basic infrastructure for EMIF driver
EMIF is an SDRAM controller used in various Texas Instruments
SoCs. EMIF supports, based on its revision, one or more of
LPDDR2/DDR2/DDR3 protocols.
Add the basic infrastructure for EMIF driver that includes
driver registration, probe, parsing of platform data etc.
Signed-off-by: Aneesh V <aneesh@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Benoit Cousson <b-cousson@ti.com>
[santosh.shilimkar@ti.com: Moved to drivers/memory from drivers/misc]
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/memory/emif.h b/drivers/memory/emif.h
index 44b97df..692b2a8 100644
--- a/drivers/memory/emif.h
+++ b/drivers/memory/emif.h
@@ -12,6 +12,13 @@
#ifndef __EMIF_H
#define __EMIF_H
+/*
+ * Maximum number of different frequencies supported by EMIF driver
+ * Determines the number of entries in the pointer array for register
+ * cache
+ */
+#define EMIF_MAX_NUM_FREQUENCIES 6
+
/* Registers offset */
#define EMIF_MODULE_ID_AND_REVISION 0x0000
#define EMIF_STATUS 0x0004