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authorRob Herring <robh@kernel.org>2023-03-28 15:16:00 -0500
committerRob Herring <robh@kernel.org>2023-04-13 17:46:35 -0500
commitff61bacd77f258bd2ed145efb69e5449b115d4fe (patch)
tree66a4d268d0aa376f86b6fe023be2568a63319b72 /drivers/of/unittest.c
parentb50c788a56964a900ebcc817c8a5ad35ddad87b6 (diff)
of/address: Add of_property_read_reg() helper
Add a helper, of_property_read_reg(), to read "reg" entries untranslated address and size. This function is intended mainly for cases with an untranslatable "reg" address (i.e. not MMIO). There's also a few translatable cases such as address cells containing a bus chip-select number. Link: https://lore.kernel.org/r/20230328-dt-address-helpers-v1-5-e2456c3e77ab@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of/unittest.c')
-rw-r--r--drivers/of/unittest.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index eaeb58065acc..e73ecbef977b 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1134,6 +1134,27 @@ static void __init of_unittest_bus_3cell_ranges(void)
of_node_put(np);
}
+static void __init of_unittest_reg(void)
+{
+ struct device_node *np;
+ int ret;
+ u64 addr, size;
+
+ np = of_find_node_by_path("/testcase-data/address-tests/bus@80000000/device@1000");
+ if (!np) {
+ pr_err("missing testcase data\n");
+ return;
+ }
+
+ ret = of_property_read_reg(np, 0, &addr, &size);
+ unittest(!ret, "of_property_read_reg(%pOF) returned error %d\n",
+ np, ret);
+ unittest(addr == 0x1000, "of_property_read_reg(%pOF) untranslated address (%llx) incorrect\n",
+ np, addr);
+
+ of_node_put(np);
+}
+
static void __init of_unittest_parse_interrupts(void)
{
struct device_node *np;
@@ -3772,6 +3793,7 @@ static int __init of_unittest(void)
of_unittest_pci_dma_ranges();
of_unittest_bus_ranges();
of_unittest_bus_3cell_ranges();
+ of_unittest_reg();
of_unittest_match_node();
of_unittest_platform_populate();
of_unittest_overlay();