drivers/of: Add empty ranges quirk for PA-Semi
The "sdc" node is missing the ranges property, it needs to be treated
as having an empty one otherwise translation fails for its children.
Fixes 746c9e9f92
, "of/base: Fix PowerPC address parsing hack"
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Stable <stable@vger.kernel.org> # v3.18+
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@ -450,12 +450,17 @@ static struct of_bus *of_match_bus(struct device_node *np)
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return NULL;
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}
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static int of_empty_ranges_quirk(void)
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static int of_empty_ranges_quirk(struct device_node *np)
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{
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if (IS_ENABLED(CONFIG_PPC)) {
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/* To save cycles, we cache the result */
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/* To save cycles, we cache the result for global "Mac" setting */
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static int quirk_state = -1;
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/* PA-SEMI sdc DT bug */
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if (of_device_is_compatible(np, "1682m-sdc"))
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return true;
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/* Make quirk cached */
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if (quirk_state < 0)
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quirk_state =
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of_machine_is_compatible("Power Macintosh") ||
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@ -490,7 +495,7 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
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* This code is only enabled on powerpc. --gcl
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*/
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ranges = of_get_property(parent, rprop, &rlen);
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if (ranges == NULL && !of_empty_ranges_quirk()) {
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if (ranges == NULL && !of_empty_ranges_quirk(parent)) {
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pr_debug("OF: no ranges; cannot translate\n");
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return 1;
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}
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