ram: rockchip: Add basic support for RK3528

Add support for reading DRAM size information from PMUGRF os_reg18 reg.

Compared to most Rockchip SoCs the RK3528 use os_reg18 for DRAM info,
instead of os_reg2.

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

diff --git a/arch/arm/mach-rockchip/sdram.c b/arch/arm/mach-rockchip/sdram.c
index f7d3282..aa3f47c 100644 (file)
--- a/arch/arm/mach-rockchip/sdram.c
+++ b/arch/arm/mach-rockchip/sdram.c
@@ -110,7 +110,8 @@ static int rockchip_dram_init_banksize(void)
        u8 i, j;
 
        if (!IS_ENABLED(CONFIG_ROCKCHIP_RK3588) &&
-           !IS_ENABLED(CONFIG_ROCKCHIP_RK3568))
+           !IS_ENABLED(CONFIG_ROCKCHIP_RK3568) &&
+           !IS_ENABLED(CONFIG_ROCKCHIP_RK3528))
                return -ENOTSUPP;
 
        if (!IS_ENABLED(CONFIG_ROCKCHIP_EXTERNAL_TPL))

diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile
index 36dc050..f222cc9 100644 (file)
--- 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-$(CONFIG_ROCKCHIP_RK3528) += sdram_rk3528.o
 obj-$(CONFIG_ROCKCHIP_RK3568) += sdram_rk3568.o
 obj-$(CONFIG_ROCKCHIP_RK3588) += sdram_rk3588.o
 obj-$(CONFIG_ROCKCHIP_RV1126) += sdram_rv1126.o sdram_pctl_px30.o

diff --git a/drivers/ram/rockchip/sdram_rk3528.c b/drivers/ram/rockchip/sdram_rk3528.c
new file mode 100644 (file)
index 0000000..89d325b
--- /dev/null
+++ b/drivers/ram/rockchip/sdram_rk3528.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                    0xff370000
+#define OS_REG18_REG                   0x248
+
+static int rk3528_dmc_get_info(struct udevice *dev, struct ram_info *info)
+{
+       info->base = CFG_SYS_SDRAM_BASE;
+       info->size = rockchip_sdram_size(PMUGRF_BASE + OS_REG18_REG);
+
+       return 0;
+}
+
+static struct ram_ops rk3528_dmc_ops = {
+       .get_info = rk3528_dmc_get_info,
+};
+
+static const struct udevice_id rk3528_dmc_ids[] = {
+       { .compatible = "rockchip,rk3528-dmc" },
+       { }
+};
+
+U_BOOT_DRIVER(rockchip_rk3528_dmc) = {
+       .name = "rockchip_rk3528_dmc",
+       .id = UCLASS_RAM,
+       .of_match = rk3528_dmc_ids,
+       .ops = &rk3528_dmc_ops,
+};