From 942ee0933e881ff500aae7e42309bf6abbc495d4 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Mon, 27 Nov 2017 05:32:42 +0100 Subject: [PATCH] fdtdec: Support parsing multiple /memory nodes It is legal to have multiple /memory nodes in a device tree . Currently, fdtdec_setup_memory_size() only supports parsing the first node . This patch extends the function such that if a particular /memory node does no longer have further "reg" entries and CONFIG_NR_DRAM_BANKS still allows for more DRAM banks, the code moves on to the next memory node and checks it's "reg"s. This makes it possible to handle both systems with single memory node with multiple entries and systems with multiple memory nodes with single entry. Signed-off-by: Marek Vasut Cc: Tom Rini Cc: Simon Glass --- lib/fdtdec.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/lib/fdtdec.c b/lib/fdtdec.c index c4582eacca..46df0f15f9 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -1176,21 +1176,33 @@ int fdtdec_setup_memory_size(void) #if defined(CONFIG_NR_DRAM_BANKS) int fdtdec_setup_memory_banksize(void) { - int bank, ret, mem; + int bank, ret, mem, reg = 0; struct fdt_resource res; - mem = fdt_path_offset(gd->fdt_blob, "/memory"); + mem = fdt_node_offset_by_prop_value(gd->fdt_blob, -1, "device_type", + "memory", 7); 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", bank, &res); - if (ret == -FDT_ERR_NOTFOUND) - break; - if (ret != 0) + ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res); + if (ret == -FDT_ERR_NOTFOUND) { + reg = 0; + mem = fdt_node_offset_by_prop_value(gd->fdt_blob, mem, + "device_type", + "memory", 7); + if (mem == -FDT_ERR_NOTFOUND) + break; + + ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res); + if (ret == -FDT_ERR_NOTFOUND) + break; + } + if (ret != 0) { return -EINVAL; + } gd->bd->bi_dram[bank].start = (phys_addr_t)res.start; gd->bd->bi_dram[bank].size = -- 2.39.5