Re: [PATCH v1 3/5] rockchip: rk3568: Add sdram driver

[Kever Yang]

On 2021/6/2 下午3:58, Joseph Chen wrote:

Add the driver for rk3568 u-boot to get sdram capacity.

Signed-off-by: Joseph Chen <che...@rock-chips.com>

Reviewed-by: Kever Yang <kever.y...@rock-chips.com>

Thanks,
- Kever

---

  drivers/ram/rockchip/Makefile       |  1 +
  drivers/ram/rockchip/sdram_rk3568.c | 56 +++++++++++++++++++++++++++++
  2 files changed, 57 insertions(+)
  create mode 100644 drivers/ram/rockchip/sdram_rk3568.c

diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile
index c3ec89ada4..ca1c289b88 100644
--- a/drivers/ram/rockchip/Makefile
+++ b/drivers/ram/rockchip/Makefile
@@ -12,4 +12,5 @@ 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-$(CONFIG_ROCKCHIP_RK3568) += sdram_rk3568.o
  obj-$(CONFIG_ROCKCHIP_SDRAM_COMMON) += sdram_common.o
diff --git a/drivers/ram/rockchip/sdram_rk3568.c 
b/drivers/ram/rockchip/sdram_rk3568.c
new file mode 100644
index 0000000000..0ac4b54eef
--- /dev/null
+++ b/drivers/ram/rockchip/sdram_rk3568.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2021 Rockchip Electronics Co., Ltd.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <ram.h>
+#include <syscon.h>
+#include <asm/arch-rockchip/clock.h>
+#include <asm/arch-rockchip/grf_rk3568.h>
+#include <asm/arch-rockchip/sdram.h>
+
+struct dram_info {
+       struct ram_info info;
+       struct rk3568_pmugrf *pmugrf;
+};
+
+static int rk3568_dmc_probe(struct udevice *dev)
+{
+       struct dram_info *priv = dev_get_priv(dev);
+
+       priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF);
+       priv->info.base = CONFIG_SYS_SDRAM_BASE;
+       priv->info.size =
+               rockchip_sdram_size((phys_addr_t)&priv->pmugrf->pmu_os_reg2);
+
+       return 0;
+}
+
+static int rk3568_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 rk3568_dmc_ops = {
+       .get_info = rk3568_dmc_get_info,
+};
+
+static const struct udevice_id rk3568_dmc_ids[] = {
+       { .compatible = "rockchip,rk3568-dmc" },
+       { }
+};
+
+U_BOOT_DRIVER(dmc_rk3568) = {
+       .name = "rockchip_rk3568_dmc",
+       .id = UCLASS_RAM,
+       .of_match = rk3568_dmc_ids,
+       .ops = &rk3568_dmc_ops,
+       .probe = rk3568_dmc_probe,
+       .priv_auto = sizeof(struct dram_info),
+};