rockchip: rk3328: add sdram driver in U-Boot

Add sdram driver in U-Boot for get the correct sdram size from
sys_reg, so that U-Boot can co-work with Rockchip loader or SPL
to get different dram capability and then tell the kernel.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

diff --git a/arch/arm/mach-rockchip/rk3328/Makefile b/arch/arm/mach-rockchip/rk3328/Makefile
index bbab036a12a5a992dcb160e3f654d7e5ac9aef21..72873e29e6aac1cabf860565cf73f268acb958a4 100644 (file)
--- a/arch/arm/mach-rockchip/rk3328/Makefile
+++ b/arch/arm/mach-rockchip/rk3328/Makefile
@@ -6,4 +6,5 @@
 
 obj-y += clk_rk3328.o
 obj-y += rk3328.o
+obj-y += sdram_rk3328.o
 obj-y += syscon_rk3328.o

diff --git a/arch/arm/mach-rockchip/rk3328/sdram_rk3328.c b/arch/arm/mach-rockchip/rk3328/sdram_rk3328.c
new file mode 100644 (file)
index 0000000..9637a35
--- /dev/null
+++ b/arch/arm/mach-rockchip/rk3328/sdram_rk3328.c
@@ -0,0 +1,60 @@
+/*
+ * (C) Copyright 2017 Rockchip Electronics Co., Ltd.
+ *
+ * SPDX-License-Identifier:     GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <ram.h>
+#include <syscon.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/grf_rk3328.h>
+#include <asm/arch/sdram_common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+struct dram_info {
+       struct ram_info info;
+       struct rk3328_grf_regs *grf;
+};
+
+static int rk3328_dmc_probe(struct udevice *dev)
+{
+       struct dram_info *priv = dev_get_priv(dev);
+
+       priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+       debug("%s: grf=%p\n", __func__, priv->grf);
+       priv->info.base = CONFIG_SYS_SDRAM_BASE;
+       priv->info.size = rockchip_sdram_size(
+                               (phys_addr_t)&priv->grf->os_reg[2]);
+
+       return 0;
+}
+
+static int rk3328_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 rk3328_dmc_ops = {
+       .get_info = rk3328_dmc_get_info,
+};
+
+
+static const struct udevice_id rk3328_dmc_ids[] = {
+       { .compatible = "rockchip,rk3328-dmc" },
+       { }
+};
+
+U_BOOT_DRIVER(dmc_rk3328) = {
+       .name = "rockchip_rk3328_dmc",
+       .id = UCLASS_RAM,
+       .of_match = rk3328_dmc_ids,
+       .ops = &rk3328_dmc_ops,
+       .probe = rk3328_dmc_probe,
+       .priv_auto_alloc_size = sizeof(struct dram_info),
+};