On Mon, 22 Jul 2013, Sudeep KarkadaNagesha wrote:
> From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@xxxxxxx>
>
> 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@xxxxxxx>
> Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@xxxxxxx>
Acked-by: Nicolas Pitre <nico@xxxxxxxxxx>
> ---
> drivers/bus/arm-cci.c | 28 +++++++---------------------
> 1 file changed, 7 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
> index 7332889..7dd891c 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);
>
> - 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;
> --
> 1.8.1.2
>
>
> --
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