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hw/misc/aspeed_scu: Skipping dram_init in u-boot

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Setting BIT6 in VGA0 SCRATCH register will indicate that the ddr traning
is done, therefore skipping the u-boot-spl dram_init() process.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Signed-off-by: Troy Lee <troy_lee@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Tested-by: Nabih Estefan <nabihestefan@google.com>
Link: https://lore.kernel.org/qemu-devel/20250304064710.2128993-2-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Jamin Lin 2025-03-04 14:47:03 +08:00 committed by Cédric Le Goater
parent 8e002a6931
commit 2d082fea48
1 changed files with 2 additions and 0 deletions
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hw/misc/aspeed_scu.c
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@ -157,6 +157,7 @@
#define AST2700_SCU_FREQ_CNTR TO_REG(0x3b0)
#define AST2700_SCU_CPU_SCRATCH_0 TO_REG(0x780)
#define AST2700_SCU_CPU_SCRATCH_1 TO_REG(0x784)
#define AST2700_SCU_VGA_SCRATCH_0 TO_REG(0x900)
#define AST2700_SCUIO_CLK_STOP_CTL_1 TO_REG(0x240)
#define AST2700_SCUIO_CLK_STOP_CLR_1 TO_REG(0x244)
@ -930,6 +931,7 @@ static const uint32_t ast2700_a0_resets[ASPEED_AST2700_SCU_NR_REGS] = {
[AST2700_SCU_FREQ_CNTR] = 0x000375eb,
[AST2700_SCU_CPU_SCRATCH_0] = 0x00000000,
[AST2700_SCU_CPU_SCRATCH_1] = 0x00000004,
[AST2700_SCU_VGA_SCRATCH_0] = 0x00000040,
};
static void aspeed_ast2700_scu_reset(DeviceState *dev)