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arm64: renesas: r8a779g3: Disable dual-rank DRAM on Retronix R-Car V4H ES2 Sparrow Hawk

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The R-Car V4H SoC before rev.3.0 can not support dual-rank LPDDR5 DRAM.
This affects 16 GiB dual-rank DRAM configuration of Retronix R-Car V4H
Sparrow Hawk board. Fall back to 8 GiB single-rank DRAM configuration
on such systems instead.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
This commit is contained in:
Marek Vasut
2025-08-06 02:57:14 +02:00
parent e394ef09bc
commit 47148dfd8f
1 changed files with 2 additions and 2 deletions
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board/renesas/sparrowhawk/sparrowhawk.c
+2 -2
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@@ -116,7 +116,7 @@ dbsc5_get_board_data(struct udevice *dev, const u32 modemr0)
* Use MD[19] setting to discern 8 GiB and 16 GiB DRAM Sparrow Hawk
* board variants from each other automatically.
*/
if (modemr0 & BIT(19))
if ((renesas_get_cpu_rev_integer() >= 3) && (modemr0 & BIT(19)))
return &renesas_v4h_sparrowhawk_16g_5500_dbsc5_board_config;
else
return &renesas_v4h_sparrowhawk_8g_6400_dbsc5_board_config;
@@ -244,7 +244,7 @@ void renesas_dram_init_banksize(void)
int bank;
/* 8 GiB device, do nothing. */
if (!(modemr0 & BIT(19)))
if (!((renesas_get_cpu_rev_integer() >= 3) && (modemr0 & BIT(19))))
return;
/* 16 GiB device, adjust memory map. */