ram: rockchip: Add rk3576 ddr driver support

Add ddr driver for rk3576 to get the ram capacity.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile
index f222cc9..fd94aad 100644 (file)
--- 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 (file)
index 0000000..5a66032
--- /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,
+};