coresight: making cpu index lookup arm64 compliant

Function "get_logical_index()" is not available on arm64.
Instead of adding the function simply using "of_get_cpu_node()" and
comparing the return value with cpu handles yields the same
result.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/coresight/of_coresight.c b/drivers/coresight/of_coresight.c
index c3efa41..f3cc8e9 100644 (file)
--- a/drivers/coresight/of_coresight.c
+++ b/drivers/coresight/of_coresight.c
@@ -22,6 +22,7 @@
 #include <linux/platform_device.h>
 #include <linux/amba/bus.h>
 #include <linux/coresight.h>
+#include <linux/cpumask.h>
 #include <asm/smp_plat.h>
 
 
@@ -113,7 +114,7 @@ static int of_coresight_alloc_memory(struct device *dev,
 struct coresight_platform_data *of_get_coresight_platform_data(
                                struct device *dev, struct device_node *node)
 {
-       int i = 0, ret = 0;
+       int i = 0, ret = 0, cpu;
        struct coresight_platform_data *pdata;
        struct of_endpoint endpoint, rendpoint;
        struct device *rdev;
@@ -187,17 +188,10 @@ struct coresight_platform_data *of_get_coresight_platform_data(
        /* Affinity defaults to CPU0 */
        pdata->cpu = 0;
        dn = of_parse_phandle(node, "cpu", 0);
-       if (dn) {
-               const u32 *cell;
-               int len, index;
-               u64 hwid;
-
-               cell = of_get_property(dn, "reg", &len);
-               if (cell) {
-                       hwid = of_read_number(cell, of_n_addr_cells(dn));
-                       index = get_logical_index(hwid);
-                       if (index != -EINVAL)
-                               pdata->cpu = index;
+       for (cpu = 0; dn && cpu < nr_cpu_ids; cpu++) {
+               if (dn == of_get_cpu_node(cpu, NULL)) {
+                       pdata->cpu = cpu;
+                       break;
                }
        }