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author | Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> | 2013-06-17 15:51:44 +0100 |
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committer | Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> | 2013-08-21 10:29:55 +0100 |
commit | da0eb143dbbaf26b6f084bee81d56fc64efb5390 (patch) | |
tree | 1b6f04e08bace36682d33866bf3c3fdac5fc1baf /drivers/cpufreq | |
parent | e768f350c8c3d4253011282db771f35af37ee59a (diff) | |
download | op-kernel-dev-da0eb143dbbaf26b6f084bee81d56fc64efb5390.zip op-kernel-dev-da0eb143dbbaf26b6f084bee81d56fc64efb5390.tar.gz |
cpufreq: arm_big_little: remove device tree parsing for cpu nodes
Now that the cpu device registration initialises the of_node(if available)
appropriately for all the cpus, parsing here is redundant.
This patch removes all DT parsing and uses cpu->of_node instead.
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r-- | drivers/cpufreq/arm_big_little_dt.c | 40 |
1 files changed, 14 insertions, 26 deletions
diff --git a/drivers/cpufreq/arm_big_little_dt.c b/drivers/cpufreq/arm_big_little_dt.c index fd9e3ea..480c0bd 100644 --- a/drivers/cpufreq/arm_big_little_dt.c +++ b/drivers/cpufreq/arm_big_little_dt.c @@ -19,12 +19,11 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt -#include <linux/cpu.h> #include <linux/cpufreq.h> #include <linux/device.h> #include <linux/export.h> #include <linux/module.h> -#include <linux/of.h> +#include <linux/of_device.h> #include <linux/opp.h> #include <linux/platform_device.h> #include <linux/slab.h> @@ -34,27 +33,13 @@ /* get cpu node with valid operating-points */ static struct device_node *get_cpu_node_with_valid_op(int cpu) { - struct device_node *np = NULL, *parent; - int count = 0; + struct device_node *np = of_cpu_device_node_get(cpu); - parent = of_find_node_by_path("/cpus"); - if (!parent) { - pr_err("failed to find OF /cpus\n"); - return NULL; + if (!of_get_property(np, "operating-points", NULL)) { + of_node_put(np); + np = NULL; } - for_each_child_of_node(parent, np) { - if (count++ != cpu) - continue; - if (!of_get_property(np, "operating-points", NULL)) { - of_node_put(np); - np = NULL; - } - - break; - } - - of_node_put(parent); return np; } @@ -63,11 +48,12 @@ static int dt_init_opp_table(struct device *cpu_dev) struct device_node *np; int ret; - np = get_cpu_node_with_valid_op(cpu_dev->id); - if (!np) - return -ENODATA; + np = of_node_get(cpu_dev->of_node); + if (!np) { + pr_err("failed to find cpu%d node\n", cpu_dev->id); + return -ENOENT; + } - cpu_dev->of_node = np; ret = of_init_opp_table(cpu_dev); of_node_put(np); @@ -79,9 +65,11 @@ static int dt_get_transition_latency(struct device *cpu_dev) struct device_node *np; u32 transition_latency = CPUFREQ_ETERNAL; - np = get_cpu_node_with_valid_op(cpu_dev->id); - if (!np) + np = of_node_get(cpu_dev->of_node); + if (!np) { + pr_info("Failed to find cpu node. Use CPUFREQ_ETERNAL transition latency\n"); return CPUFREQ_ETERNAL; + } of_property_read_u32(np, "clock-latency", &transition_latency); of_node_put(np); |