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ddr: altera: n5x: Restructure DDR driver in preparation to support LPDDR4

Message ID 20221122010903.15213-1-jit.loon.lim@intel.com
State Needs Review / ACK, archived
Delegated to: Marek Vasut
Headers show
Series ddr: altera: n5x: Restructure DDR driver in preparation to support LPDDR4 | expand

Commit Message

Jit Loon Lim Nov. 22, 2022, 1:09 a.m. UTC 
From: Tien Fong Chee <tien.fong.chee@intel.com>

Restructure DDR driver so that driver has the ability to recognize the
DDR type by populating DDR handoff from bitstream. This is also in
preparation to improve driver for supporting additional LPDDR4.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
---
 drivers/ddr/altera/sdram_n5x.c | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/drivers/ddr/altera/sdram_n5x.c b/drivers/ddr/altera/sdram_n5x.c
index 737a4e2ff1..8dba6bb035 100644
--- a/drivers/ddr/altera/sdram_n5x.c
+++ b/drivers/ddr/altera/sdram_n5x.c
@@ -336,6 +336,13 @@  enum reset_type {
 	COLD_RESET
 };
 
+enum ddr_type {
+	DDRTYPE_LPDDR4_0,
+	DDRTYPE_LPDDR4_1,
+	DDRTYPE_DDR4,
+	DDRTYPE_UNKNOWN
+};
+
 /* DDR handoff structure */
 struct ddr_handoff {
 	/* Memory reset manager base */