Add support for reading DRAM size information from PMUGRF os_reg2 reg.
Signed-off-by: Jonas Karlman <[email protected]>
---
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,
+};
--
2.52.0
