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drivers/bus: arm-cci: avoid parsing DT for cpu device nodes

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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>
This commit is contained in:
Sudeep KarkadaNagesha 2013-06-17 14:51:48 +01:00
parent f6cec7cd07
commit 78b4d6e0fd
1 changed files with 7 additions and 21 deletions
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28
drivers/bus/arm-cci.c
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@ -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))
for_each_possible_cpu(cpu) {
/* too early to use cpu->of_node */
cpun = of_get_cpu_node(cpu, NULL);
if (WARN(!cpun, "Missing cpu device node\n"))
continue;
hwid = of_read_number(cell, ac);
cpu = get_logical_index(hwid & MPIDR_HWID_BITMASK);
if (cpu < 0 || !cpu_possible(cpu))
continue;
port = __cci_ace_get_port(cpun, ACE_PORT);
if (port < 0)
continue;