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Subject[PATCH v2 26/29] arm: use common of_flat_dt_match_machine
Date
From: Rob Herring <rob.herring@calxeda.com>

Convert arm to use the common of_flat_dt_match_machine function.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
arch/arm/kernel/devtree.c | 42 ++++++++++++++++++++----------------------
1 file changed, 20 insertions(+), 22 deletions(-)

diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index e7ce175..0541f36 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -174,6 +174,19 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
return (phys_id & MPIDR_HWID_BITMASK) == cpu_logical_map(cpu);
}

+static const void * __init arch_get_next_mach(const char *const **match)
+{
+ static const struct machine_desc *mdesc = __arch_info_begin;
+ const struct machine_desc *m = mdesc;
+
+ if (m >= __arch_info_end)
+ return NULL;
+
+ mdesc++;
+ *match = m->dt_compat;
+ return m;
+}
+
/**
* setup_machine_fdt - Machine setup when an dtb was passed to the kernel
* @dt_phys: physical address of dt blob
@@ -184,9 +197,6 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
{
const struct machine_desc *mdesc, *mdesc_best = NULL;
- unsigned int score, mdesc_score = ~1;
- unsigned long dt_root;
- const char *model;

#ifdef CONFIG_ARCH_MULTIPLATFORM
DT_MACHINE_START(GENERIC_DT, "Generic DT based system")
@@ -198,23 +208,17 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
if (!dt_phys || !early_init_dt_scan(phys_to_virt(dt_phys)))
return NULL;

+ mdesc = of_flat_dt_match_machine(mdesc_best, arch_get_next_mach);

- /* Search the mdescs for the 'best' compatible value match */
- dt_root = of_get_flat_dt_root();
- for_each_machine_desc(mdesc) {
- score = of_flat_dt_match(dt_root, mdesc->dt_compat);
- if (score > 0 && score < mdesc_score) {
- mdesc_best = mdesc;
- mdesc_score = score;
- }
- }
- if (!mdesc_best) {
+ if (!mdesc) {
const char *prop;
long size;
+ unsigned long dt_root;

early_print("\nError: unrecognized/unsupported "
"device tree compatible list:\n[ ");

+ dt_root = of_get_flat_dt_root();
prop = of_get_flat_dt_prop(dt_root, "compatible", &size);
while (size > 0) {
early_print("'%s' ", prop);
@@ -225,16 +229,10 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)

dump_machine_table(); /* does not return */
}
-
- model = of_get_flat_dt_prop(dt_root, "model", NULL);
- if (!model)
- model = of_get_flat_dt_prop(dt_root, "compatible", NULL);
- if (!model)
- model = "<unknown>";
- pr_info("Machine: %s, model: %s\n", mdesc_best->name, model);
+ early_print("matched mach %s\n", mdesc->name);

/* Change machine number to match the mdesc we're using */
- __machine_arch_type = mdesc_best->nr;
+ __machine_arch_type = mdesc->nr;

- return mdesc_best;
+ return mdesc;
}
--
1.8.1.2


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