From b4c80f245b7a986b23c8c487ec1c15229c85af8a Mon Sep 17 00:00:00 2001 From: Dominic Rath Date: Wed, 6 Apr 2022 11:56:47 +0200 Subject: [PATCH] ram: k3-ddrss: Fix register name and explain its usage The k3-ddrss driver wants to configure the DDRSS_V2A_CTL_REG to reflect the maximum possible SDRAM of 2 GB for AM64x (instead of the register's default that says 8 GB, which the AM64x DDR controller wouldn't support). The offset 0x20 was correct, but the register name DDRSS_V2A_R1_MAT_REG was that of the next register at offset 0x24. Signed-off-by: Dominic Rath --- drivers/ram/k3-ddrss/k3-ddrss.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/ram/k3-ddrss/k3-ddrss.c b/drivers/ram/k3-ddrss/k3-ddrss.c index 2467f12..6217f98 100644 --- a/drivers/ram/k3-ddrss/k3-ddrss.c +++ b/drivers/ram/k3-ddrss/k3-ddrss.c @@ -30,7 +30,7 @@ #define CTRLMMR_DDR4_FSP_CLKCHNG_REQ_OFFS 0x80 #define CTRLMMR_DDR4_FSP_CLKCHNG_ACK_OFFS 0xc0 -#define DDRSS_V2A_R1_MAT_REG 0x0020 +#define DDRSS_V2A_CTL_REG 0x0020 #define DDRSS_ECC_CTRL_REG 0x0120 #define DDRSS_ECC_CTRL_REG_ECC_EN BIT(0) @@ -620,8 +620,8 @@ static int k3_ddrss_probe(struct udevice *dev) return ret; #ifdef CONFIG_K3_AM64_DDRSS - - writel(0x000001EF, ddrss->ddrss_ss_cfg + DDRSS_V2A_R1_MAT_REG); + /* AM64x supports only up to 2 GB SDRAM */ + writel(0x000001EF, ddrss->ddrss_ss_cfg + DDRSS_V2A_CTL_REG); writel(0x0, ddrss->ddrss_ss_cfg + DDRSS_ECC_CTRL_REG); #endif -- 2.7.4