[PATCH v3 07/15] ram: rockchip: Add rk3576 ddr driver support

[Kever Yang]

On 2025/4/16 05:51, Heiko Stuebner wrote:
> Add ddr driver for rk3576 to get the ram capacity.
>
> Signed-off-by: Heiko Stuebner <heiko at sntech.de>
> Reviewed-by: Jonas Karlman <jonas at kwiboo.se>

Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
>   drivers/ram/rockchip/Makefile       |  1 +
>   drivers/ram/rockchip/sdram_rk3576.c | 35 +++++++++++++++++++++++++++++
>   2 files changed, 36 insertions(+)
>   create mode 100644 drivers/ram/rockchip/sdram_rk3576.c
>
> diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile
> index f222cc99f1e..fd94aad0cd4 100644
> --- a/drivers/ram/rockchip/Makefile
> +++ b/drivers/ram/rockchip/Makefile
> @@ -15,6 +15,7 @@ obj-$(CONFIG_ROCKCHIP_RK3328) = sdram_rk3328.o sdram_pctl_px30.o sdram_phy_px30.
>   obj-$(CONFIG_ROCKCHIP_RK3399) += sdram_rk3399.o
>   obj-$(CONFIG_ROCKCHIP_RK3528) += sdram_rk3528.o
>   obj-$(CONFIG_ROCKCHIP_RK3568) += sdram_rk3568.o
> +obj-$(CONFIG_ROCKCHIP_RK3576) += sdram_rk3576.o
>   obj-$(CONFIG_ROCKCHIP_RK3588) += sdram_rk3588.o
>   obj-$(CONFIG_ROCKCHIP_RV1126) += sdram_rv1126.o sdram_pctl_px30.o
>   obj-$(CONFIG_ROCKCHIP_SDRAM_COMMON) += sdram_common.o
> diff --git a/drivers/ram/rockchip/sdram_rk3576.c b/drivers/ram/rockchip/sdram_rk3576.c
> new file mode 100644
> index 00000000000..5a66032ef8f
> --- /dev/null
> +++ b/drivers/ram/rockchip/sdram_rk3576.c
> @@ -0,0 +1,35 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * (C) Copyright 2024 Rockchip Electronics Co., Ltd.
> + */
> +
> +#include <dm.h>
> +#include <ram.h>
> +#include <asm/arch-rockchip/sdram.h>
> +
> +#define PMU1GRF_BASE			0x26026000
> +#define OS_REG2_REG			0x208
> +
> +static int rk3576_dmc_get_info(struct udevice *dev, struct ram_info *info)
> +{
> +	info->base = CFG_SYS_SDRAM_BASE;
> +	info->size = rockchip_sdram_size(PMU1GRF_BASE + OS_REG2_REG);
> +
> +	return 0;
> +}
> +
> +static struct ram_ops rk3576_dmc_ops = {
> +	.get_info = rk3576_dmc_get_info,
> +};
> +
> +static const struct udevice_id rk3576_dmc_ids[] = {
> +	{ .compatible = "rockchip,rk3576-dmc" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(rockchip_rk3576_dmc) = {
> +	.name = "rockchip_rk3576_dmc",
> +	.id = UCLASS_RAM,
> +	.of_match = rk3576_dmc_ids,
> +	.ops = &rk3576_dmc_ops,
> +};