[U-Boot] [PATCH 2/4] lib: fdt: Split fdtdec_setup_memory_banksize()
Marek Vasut
marek.vasut at gmail.com
Tue Mar 5 03:25:55 UTC 2019
Split fdtdec_setup_memory_banksize() into fdtdec_setup_memory_banksize_fdt(),
which allows the caller to pass custom blob into the function and the
original fdtdec_setup_memory_banksize(), which uses the gd->fdt_blob. This
is useful when configuring the DRAM properties from a FDT blob fragment
passed in by the firmware.
Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
Cc: Simon Glass <sjg at chromium.org>
Cc: Tom Rini <trini at konsulko.com>
---
include/fdtdec.h | 19 +++++++++++++++++++
lib/fdtdec.c | 18 ++++++++++++------
2 files changed, 31 insertions(+), 6 deletions(-)
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 3e681099a8..ad00f79f20 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -955,6 +955,25 @@ int fdtdec_setup_mem_size_base_fdt(const void *blob);
*/
int fdtdec_setup_mem_size_base(void);
+/**
+ * fdtdec_setup_memory_banksize_fdt() - decode and populate gd->bd->bi_dram
+ *
+ * Decode the /memory 'reg' property to determine the address and size of the
+ * memory banks. Use this data to populate the global data board info with the
+ * phys address and size of memory banks.
+ *
+ * This function should be called from a boards dram_init_banksize(). This
+ * helper function allows for boards to query the device tree for memory bank
+ * information instead of hard coding the information in cases where it cannot
+ * be detected automatically.
+ *
+ * @param blob FDT blob
+ *
+ * @return 0 if OK, -EINVAL if the /memory node or reg property is missing or
+ * invalid
+ */
+int fdtdec_setup_memory_banksize_fdt(const void *blob);
+
/**
* fdtdec_setup_memory_banksize() - decode and populate gd->bd->bi_dram
*
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 3f29e9d647..79915b59bd 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1123,33 +1123,33 @@ int fdtdec_setup_mem_size_base(void)
static int get_next_memory_node(const void *blob, int mem)
{
do {
- mem = fdt_node_offset_by_prop_value(gd->fdt_blob, mem,
+ mem = fdt_node_offset_by_prop_value(blob, mem,
"device_type", "memory", 7);
} while (!fdtdec_get_is_enabled(blob, mem));
return mem;
}
-int fdtdec_setup_memory_banksize(void)
+int fdtdec_setup_memory_banksize_fdt(const void *blob)
{
int bank, ret, mem, reg = 0;
struct fdt_resource res;
- mem = get_next_memory_node(gd->fdt_blob, -1);
+ mem = get_next_memory_node(blob, -1);
if (mem < 0) {
debug("%s: Missing /memory node\n", __func__);
return -EINVAL;
}
for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
- ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
+ ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
if (ret == -FDT_ERR_NOTFOUND) {
reg = 0;
- mem = get_next_memory_node(gd->fdt_blob, mem);
+ mem = get_next_memory_node(blob, mem);
if (mem == -FDT_ERR_NOTFOUND)
break;
- ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
+ ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
if (ret == -FDT_ERR_NOTFOUND)
break;
}
@@ -1169,6 +1169,12 @@ int fdtdec_setup_memory_banksize(void)
return 0;
}
+
+int fdtdec_setup_memory_banksize(void)
+{
+ return fdtdec_setup_memory_banksize_fdt(gd->fdt_blob);
+
+}
#endif
#if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
--
2.19.2
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