[PATCH v2] rockchip: sdram: fix LPDDR5 bank info for sys_reg version 3

[Kever Yang]

From: YouMin Chen <cym at rock-chips.com>

This patch add support for additional bank info used by LPDDR5.

Signed-off-by: YouMin Chen <cym at rock-chips.com>
Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---

(no changes since v1)

 arch/arm/mach-rockchip/sdram.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-rockchip/sdram.c b/arch/arm/mach-rockchip/sdram.c
index 99ecbdc3412..0d9a0aef6f5 100644
--- a/arch/arm/mach-rockchip/sdram.c
+++ b/arch/arm/mach-rockchip/sdram.c
@@ -109,7 +109,14 @@ size_t rockchip_sdram_size(phys_addr_t reg)
 		cs0_col = 9 + (sys_reg2 >> SYS_REG_COL_SHIFT(ch) &
 			  SYS_REG_COL_MASK);
 		cs1_col = cs0_col;
-		bk = 3 - ((sys_reg2 >> SYS_REG_BK_SHIFT(ch)) & SYS_REG_BK_MASK);
+		if (dram_type == LPDDR5)
+			/* LPDDR5: 0:8bank(bk=3), 1:16bank(bk=4) */
+			bk = 3 + ((sys_reg2 >> SYS_REG_BK_SHIFT(ch)) &
+			SYS_REG_BK_MASK);
+		else
+			/* Other: 0:8bank(bk=3), 1:4bank(bk=2) */
+			bk = 3 - ((sys_reg2 >> SYS_REG_BK_SHIFT(ch)) &
+			SYS_REG_BK_MASK);
 		if (version >= 2) {
 			cs1_col = 9 + (sys_reg3 >> SYS_REG_CS1_COL_SHIFT(ch) &
 				  SYS_REG_CS1_COL_MASK);
-- 
2.25.1