[PATCH v2 04/12] ram: rockchip: Add basic support for RK3506

[Kever Yang]

On 2026/2/1 07:38, Jonas Karlman wrote:
> Add support for reading DRAM size information from PMUGRF os_reg2 reg.
>
> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
> Tested-by: Aaron Griffith <aargri at gmail.com>
Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
> v2: Collect t-b tag
> ---
>   drivers/ram/rockchip/Makefile       |  1 +
>   drivers/ram/rockchip/sdram_rk3506.c | 33 +++++++++++++++++++++++++++++
>   2 files changed, 34 insertions(+)
>   create mode 100644 drivers/ram/rockchip/sdram_rk3506.c
>
> diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile
> index fd94aad0cd49..27921ae4921a 100644
> --- a/drivers/ram/rockchip/Makefile
> +++ b/drivers/ram/rockchip/Makefile
> @@ -13,6 +13,7 @@ obj-$(CONFIG_ROCKCHIP_RK3288) = sdram_rk3288.o
>   obj-$(CONFIG_ROCKCHIP_RK3308) = sdram_rk3308.o
>   obj-$(CONFIG_ROCKCHIP_RK3328) = sdram_rk3328.o sdram_pctl_px30.o sdram_phy_px30.o
>   obj-$(CONFIG_ROCKCHIP_RK3399) += sdram_rk3399.o
> +obj-$(CONFIG_ROCKCHIP_RK3506) += sdram_rk3506.o
>   obj-$(CONFIG_ROCKCHIP_RK3528) += sdram_rk3528.o
>   obj-$(CONFIG_ROCKCHIP_RK3568) += sdram_rk3568.o
>   obj-$(CONFIG_ROCKCHIP_RK3576) += sdram_rk3576.o
> diff --git a/drivers/ram/rockchip/sdram_rk3506.c b/drivers/ram/rockchip/sdram_rk3506.c
> new file mode 100644
> index 000000000000..a8396ea88883
> --- /dev/null
> +++ b/drivers/ram/rockchip/sdram_rk3506.c
> @@ -0,0 +1,33 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +// Copyright Contributors to the U-Boot project.
> +
> +#include <dm.h>
> +#include <ram.h>
> +#include <asm/arch-rockchip/sdram.h>
> +
> +#define PMUGRF_BASE			0xff910000
> +#define OS_REG2_REG			0x208
> +
> +static int rk3506_dmc_get_info(struct udevice *dev, struct ram_info *info)
> +{
> +	info->base = CFG_SYS_SDRAM_BASE;
> +	info->size = rockchip_sdram_size(PMUGRF_BASE + OS_REG2_REG);
> +
> +	return 0;
> +}
> +
> +static struct ram_ops rk3506_dmc_ops = {
> +	.get_info = rk3506_dmc_get_info,
> +};
> +
> +static const struct udevice_id rk3506_dmc_ids[] = {
> +	{ .compatible = "rockchip,rk3506-dmc" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(rockchip_rk3506_dmc) = {
> +	.name = "rockchip_rk3506_dmc",
> +	.id = UCLASS_RAM,
> +	.of_match = rk3506_dmc_ids,
> +	.ops = &rk3506_dmc_ops,
> +};