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authorSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>2013-06-17 14:51:48 +0100
committerSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>2013-08-21 10:29:53 +0100
commit78b4d6e0fd2695da3019c86133444578d1ceeed3 (patch)
tree668a67466bff03be655d80db3dd35504c96f9542 /drivers/bus
parentf6cec7cd0777fa18723fce9d398fa7e53b6ef00c (diff)
downloadop-kernel-dev-78b4d6e0fd2695da3019c86133444578d1ceeed3.zip
op-kernel-dev-78b4d6e0fd2695da3019c86133444578d1ceeed3.tar.gz
drivers/bus: arm-cci: avoid parsing DT for cpu device nodes
Since the CPU device nodes can be retrieved using arch_of_get_cpu_node, we can use it to avoid parsing the cpus node searching the cpu nodes and mapping to logical index. This patch removes parsing DT for cpu nodes by using of_get_cpu_node. Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/arm-cci.c28
1 files changed, 7 insertions, 21 deletions
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 7332889..2009266 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -122,17 +122,8 @@ EXPORT_SYMBOL_GPL(cci_ace_get_port);
static void __init cci_ace_init_ports(void)
{
- int port, ac, cpu;
- u64 hwid;
- const u32 *cell;
- struct device_node *cpun, *cpus;
-
- cpus = of_find_node_by_path("/cpus");
- if (WARN(!cpus, "Missing cpus node, bailing out\n"))
- return;
-
- if (WARN_ON(of_property_read_u32(cpus, "#address-cells", &ac)))
- ac = of_n_addr_cells(cpus);
+ int port, cpu;
+ struct device_node *cpun;
/*
* Port index look-up speeds up the function disabling ports by CPU,
@@ -141,18 +132,13 @@ static void __init cci_ace_init_ports(void)
* The stashed index array is initialized for all possible CPUs
* at probe time.
*/
- for_each_child_of_node(cpus, cpun) {
- if (of_node_cmp(cpun->type, "cpu"))
- continue;
- cell = of_get_property(cpun, "reg", NULL);
- if (WARN(!cell, "%s: missing reg property\n", cpun->full_name))
- continue;
-
- hwid = of_read_number(cell, ac);
- cpu = get_logical_index(hwid & MPIDR_HWID_BITMASK);
+ for_each_possible_cpu(cpu) {
+ /* too early to use cpu->of_node */
+ cpun = of_get_cpu_node(cpu, NULL);
- if (cpu < 0 || !cpu_possible(cpu))
+ if (WARN(!cpun, "Missing cpu device node\n"))
continue;
+
port = __cci_ace_get_port(cpun, ACE_PORT);
if (port < 0)
continue;
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