| Message ID | 1374492747-13879-7-git-send-email-Sudeep.KarkadaNagesha@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, 22 Jul 2013, Sudeep KarkadaNagesha wrote: > From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> > > 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> > Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org> > --- > 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 > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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;