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authorRob Herring <robh@kernel.org>2022-01-12 10:14:09 -0600
committerRob Herring <robh@kernel.org>2022-01-12 10:14:09 -0600
commite623611b4d3f722b57ceeaf4368ac787837408e7 (patch)
treedfcea1c4db3f59b8d084f4ddc24dda6e6180e460 /drivers/of
parent785576c9356fb249e2715fe25f47c773385574ce (diff)
parentb398123bff3bcbc1facb0f29bf6e7b9f1bc55931 (diff)
Merge branch 'dt/linus' into dt/next
Pick a fix which didn't make it into v5.16.
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/fdt.c19
-rw-r--r--drivers/of/irq.c27
2 files changed, 38 insertions, 8 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index cf7608f0537b..ca2cfb3012a4 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -967,18 +967,22 @@ static void __init early_init_dt_check_for_elfcorehdr(unsigned long node)
elfcorehdr_addr, elfcorehdr_size);
}
-static phys_addr_t cap_mem_addr;
-static phys_addr_t cap_mem_size;
+static unsigned long chosen_node_offset = -FDT_ERR_NOTFOUND;
/**
* early_init_dt_check_for_usable_mem_range - Decode usable memory range
* location from flat tree
- * @node: reference to node containing usable memory range location ('chosen')
*/
-static void __init early_init_dt_check_for_usable_mem_range(unsigned long node)
+void __init early_init_dt_check_for_usable_mem_range(void)
{
const __be32 *prop;
int len;
+ phys_addr_t cap_mem_addr;
+ phys_addr_t cap_mem_size;
+ unsigned long node = chosen_node_offset;
+
+ if ((long)node < 0)
+ return;
pr_debug("Looking for usable-memory-range property... ");
@@ -991,6 +995,8 @@ static void __init early_init_dt_check_for_usable_mem_range(unsigned long node)
pr_debug("cap_mem_start=%pa cap_mem_size=%pa\n", &cap_mem_addr,
&cap_mem_size);
+
+ memblock_cap_memory_range(cap_mem_addr, cap_mem_size);
}
#ifdef CONFIG_SERIAL_EARLYCON
@@ -1143,9 +1149,10 @@ int __init early_init_dt_scan_chosen(char *cmdline)
if (node < 0)
return -ENOENT;
+ chosen_node_offset = node;
+
early_init_dt_check_for_initrd(node);
early_init_dt_check_for_elfcorehdr(node);
- early_init_dt_check_for_usable_mem_range(node);
/* Retrieve command line */
p = of_get_flat_dt_prop(node, "bootargs", &l);
@@ -1280,7 +1287,7 @@ void __init early_init_dt_scan_nodes(void)
early_init_dt_scan_memory();
/* Handle linux,usable-memory-range property */
- memblock_cap_memory_range(cap_mem_addr, cap_mem_size);
+ early_init_dt_check_for_usable_mem_range();
}
bool __init early_init_dt_scan(void *params)
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index b10f015b2e37..2b07677a386b 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -76,6 +76,26 @@ struct device_node *of_irq_find_parent(struct device_node *child)
}
EXPORT_SYMBOL_GPL(of_irq_find_parent);
+/*
+ * These interrupt controllers abuse interrupt-map for unspeakable
+ * reasons and rely on the core code to *ignore* it (the drivers do
+ * their own parsing of the property).
+ *
+ * If you think of adding to the list for something *new*, think
+ * again. There is a high chance that you will be sent back to the
+ * drawing board.
+ */
+static const char * const of_irq_imap_abusers[] = {
+ "CBEA,platform-spider-pic",
+ "sti,platform-spider-pic",
+ "realtek,rtl-intc",
+ "fsl,ls1021a-extirq",
+ "fsl,ls1043a-extirq",
+ "fsl,ls1088a-extirq",
+ "renesas,rza1-irqc",
+ NULL,
+};
+
/**
* of_irq_parse_raw - Low level interrupt tree parsing
* @addr: address specifier (start of "reg" property of the device) in be32 format
@@ -159,12 +179,15 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
/*
* Now check if cursor is an interrupt-controller and
* if it is then we are done, unless there is an
- * interrupt-map which takes precedence.
+ * interrupt-map which takes precedence except on one
+ * of these broken platforms that want to parse
+ * interrupt-map themselves for $reason.
*/
bool intc = of_property_read_bool(ipar, "interrupt-controller");
imap = of_get_property(ipar, "interrupt-map", &imaplen);
- if (imap == NULL && intc) {
+ if (intc &&
+ (!imap || of_device_compatible_match(ipar, of_irq_imap_abusers))) {
pr_debug(" -> got it !\n");
return 0;
}