Add ddr driver for rk3576 to get the ram capacity.
Signed-off-by: Heiko Stuebner heiko@sntech.de --- drivers/ram/rockchip/Makefile | 1 + drivers/ram/rockchip/sdram_rk3576.c | 65 +++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+) create mode 100644 drivers/ram/rockchip/sdram_rk3576.c
diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile index 36dc0500dab..442fe73deb6 100644 --- a/drivers/ram/rockchip/Makefile +++ b/drivers/ram/rockchip/Makefile @@ -14,6 +14,7 @@ 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_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..fa4187a5860 --- /dev/null +++ b/drivers/ram/rockchip/sdram_rk3576.c @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2024 Rockchip Electronics Co., Ltd. + */ + +#include <config.h> +#include <dm.h> +#include <ram.h> +#include <syscon.h> +#include <asm/arch-rockchip/clock.h> +#include <asm/arch-rockchip/grf_rk3576.h> +#include <asm/arch-rockchip/sdram.h> + +struct dram_info { + struct ram_info info; + struct rk3576_pmu1grf *pmugrf; +}; + +static int rk3576_dmc_probe(struct udevice *dev) +{ + struct dram_info *priv = dev_get_priv(dev); + + priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF); + + /* + * On a 16GB board the DDR ATAG reports: + * start 0x40000000, size 0x400000000 + * While the size value from the pmugrf below reports + * pmugrf->osreg2: 0x400000000 + * pmugrf->osreg4: 0x10000000 + * So it seems only osreg2 is responsible for the ram size. + */ + priv->info.base = CFG_SYS_SDRAM_BASE; + priv->info.size = + rockchip_sdram_size((phys_addr_t)&priv->pmugrf->os_reg[2]); + + return 0; +} + +static int rk3576_dmc_get_info(struct udevice *dev, struct ram_info *info) +{ + struct dram_info *priv = dev_get_priv(dev); + + *info = priv->info; + + 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(dmc_rk3576) = { + .name = "rockchip_rk3576_dmc", + .id = UCLASS_RAM, + .of_match = rk3576_dmc_ids, + .ops = &rk3576_dmc_ops, + .probe = rk3576_dmc_probe, + .priv_auto = sizeof(struct dram_info), +};