[PATCH 1/2] ram: k3-ddrss: Fix register name and explain its usage

[Dave Gerlach]

Hi,

On 3/22/22 07:11, Dominic Rath wrote:
> 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 <rath at ibv-augsburg.net>

This patch looks good to me.

Acked-by: Dave Gerlach <d-gerlach at ti.com>

> ---
>   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 25e3976e65..261ba64506 100644
> --- a/drivers/ram/k3-ddrss/k3-ddrss.c
> +++ b/drivers/ram/k3-ddrss/k3-ddrss.c
> @@ -27,7 +27,7 @@
>   #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 SINGLE_DDR_SUBSYSTEM	0x1
> @@ -529,8 +529,8 @@ 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
>   -- 2.35.1
>