of: Add testcases for interrupt parsing

This patch extends the DT selftest code with some test cases for the
interrupt parsing functions.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 85 insertions, 6 deletions

diff --git a/drivers/of/selftest.c b/drivers/of/selftest.c
index 0eb5c38b4e07..9c80f0b7556b 100644
--- a/drivers/of/selftest.c
+++ b/drivers/of/selftest.c
@@ -9,18 +9,24 @@
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_irq.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/device.h>
 
-static bool selftest_passed = true;
+static struct selftest_results {
+        int passed;
+        int failed;
+} selftest_results;
+
 #define selftest(result, fmt, ...) { \
         if (!(result)) { \
-                pr_err("FAIL %s:%i " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
-                selftest_passed = false; \
+                selftest_results.failed++; \
+                pr_err("FAIL %s():%i " fmt, __func__, __LINE__, ##__VA_ARGS__); \
         } else { \
-                pr_info("pass %s:%i\n", __FILE__, __LINE__); \
+                selftest_results.passed++; \
+                pr_debug("pass %s():%i\n", __func__, __LINE__); \
         } \
 }
 
@@ -131,7 +137,6 @@ static void __init of_selftest_property_match_string(void)
         struct device_node *np;
         int rc;
 
-        pr_info("start\n");
         np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
         if (!np) {
                 pr_err("No testcase data in device tree\n");
@@ -154,6 +159,78 @@ static void __init of_selftest_property_match_string(void)
         selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc);
 }
 
+static void __init of_selftest_parse_interrupts(void)
+{
+        struct device_node *np;
+        struct of_phandle_args args;
+        int i, rc;
+
+        np = of_find_node_by_path("/testcase-data/interrupts/interrupts0");
+        if (!np) {
+                pr_err("missing testcase data\n");
+                return;
+        }
+
+        for (i = 0; i < 4; i++) {
+                bool passed = true;
+                args.args_count = 0;
+                rc = of_irq_parse_one(np, i, &args);
+
+                passed &= !rc;
+                passed &= (args.args_count == 1);
+                passed &= (args.args[0] == (i + 1));
+
+                selftest(passed, "index %i - data error on node %s rc=%i\n",
+                         i, args.np->full_name, rc);
+        }
+        of_node_put(np);
+
+        np = of_find_node_by_path("/testcase-data/interrupts/interrupts1");
+        if (!np) {
+                pr_err("missing testcase data\n");
+                return;
+        }
+
+        for (i = 0; i < 4; i++) {
+                bool passed = true;
+                args.args_count = 0;
+                rc = of_irq_parse_one(np, i, &args);
+
+                /* Test the values from tests-phandle.dtsi */
+                switch (i) {
+                case 0:
+                        passed &= !rc;
+                        passed &= (args.args_count == 1);
+                        passed &= (args.args[0] == 9);
+                        break;
+                case 1:
+                        passed &= !rc;
+                        passed &= (args.args_count == 3);
+                        passed &= (args.args[0] == 10);
+                        passed &= (args.args[1] == 11);
+                        passed &= (args.args[2] == 12);
+                        break;
+                case 2:
+                        passed &= !rc;
+                        passed &= (args.args_count == 2);
+                        passed &= (args.args[0] == 13);
+                        passed &= (args.args[1] == 14);
+                        break;
+                case 3:
+                        passed &= !rc;
+                        passed &= (args.args_count == 2);
+                        passed &= (args.args[0] == 15);
+                        passed &= (args.args[1] == 16);
+                        break;
+                default:
+                        passed = false;
+                }
+                selftest(passed, "index %i - data error on node %s rc=%i\n",
+                         i, args.np->full_name, rc);
+        }
+        of_node_put(np);
+}
+
 static int __init of_selftest(void)
 {
         struct device_node *np;
@@ -168,7 +245,9 @@ static int __init of_selftest(void)
         pr_info("start of selftest - you will see error messages\n");
         of_selftest_parse_phandle_with_args();
         of_selftest_property_match_string();
-        pr_info("end of selftest - %s\n", selftest_passed ? "PASS" : "FAIL");
+        of_selftest_parse_interrupts();
+        pr_info("end of selftest - %i passed, %i failed\n",
+                selftest_results.passed, selftest_results.failed);
         return 0;
 }
 late_initcall(of_selftest);