From: Huang Rui <ray.huang@amd.com>
Date: Tue, 22 Feb 2022 15:34:20 +0000 (+0800)
Subject: cpupower: Add the function to get the sysfs value from specific table
X-Git-Tag: howlett/maple/20220722_2~1005^2^2~5^2~6
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e3ede97657d8cfc4fd75aecad50269534bb55aed;p=users%2Fjedix%2Flinux-maple.git

cpupower: Add the function to get the sysfs value from specific table

Expose the helper into cpufreq header, then cpufreq driver can use this
function to get the sysfs value if it has any specific sysfs interfaces.

Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---

diff --git a/tools/power/cpupower/lib/cpufreq.c b/tools/power/cpupower/lib/cpufreq.c
index c3b56db8b9214..1516d23c17c98 100644
--- a/tools/power/cpupower/lib/cpufreq.c
+++ b/tools/power/cpupower/lib/cpufreq.c
@@ -83,20 +83,21 @@ static const char *cpufreq_value_files[MAX_CPUFREQ_VALUE_READ_FILES] = {
 	[STATS_NUM_TRANSITIONS] = "stats/total_trans"
 };
 
-
-static unsigned long sysfs_cpufreq_get_one_value(unsigned int cpu,
-						 enum cpufreq_value which)
+unsigned long cpufreq_get_sysfs_value_from_table(unsigned int cpu,
+						 const char **table,
+						 unsigned int index,
+						 unsigned int size)
 {
 	unsigned long value;
 	unsigned int len;
 	char linebuf[MAX_LINE_LEN];
 	char *endp;
 
-	if (which >= MAX_CPUFREQ_VALUE_READ_FILES)
+	if (!table || index >= size || !table[index])
 		return 0;
 
-	len = sysfs_cpufreq_read_file(cpu, cpufreq_value_files[which],
-				linebuf, sizeof(linebuf));
+	len = sysfs_cpufreq_read_file(cpu, table[index], linebuf,
+				      sizeof(linebuf));
 
 	if (len == 0)
 		return 0;
@@ -109,6 +110,14 @@ static unsigned long sysfs_cpufreq_get_one_value(unsigned int cpu,
 	return value;
 }
 
+static unsigned long sysfs_cpufreq_get_one_value(unsigned int cpu,
+						 enum cpufreq_value which)
+{
+	return cpufreq_get_sysfs_value_from_table(cpu, cpufreq_value_files,
+						  which,
+						  MAX_CPUFREQ_VALUE_READ_FILES);
+}
+
 /* read access to files which contain one string */
 
 enum cpufreq_string {
@@ -124,7 +133,7 @@ static const char *cpufreq_string_files[MAX_CPUFREQ_STRING_FILES] = {
 
 
 static char *sysfs_cpufreq_get_one_string(unsigned int cpu,
-					   enum cpufreq_string which)
+					  enum cpufreq_string which)
 {
 	char linebuf[MAX_LINE_LEN];
 	char *result;
diff --git a/tools/power/cpupower/lib/cpufreq.h b/tools/power/cpupower/lib/cpufreq.h
index 95f4fd9e2656c..2f3c840358063 100644
--- a/tools/power/cpupower/lib/cpufreq.h
+++ b/tools/power/cpupower/lib/cpufreq.h
@@ -203,6 +203,18 @@ int cpufreq_modify_policy_governor(unsigned int cpu, char *governor);
 int cpufreq_set_frequency(unsigned int cpu,
 				unsigned long target_frequency);
 
+/*
+ * get the sysfs value from specific table
+ *
+ * Read the value with the sysfs file name from specific table. Does
+ * only work if the cpufreq driver has the specific sysfs interfaces.
+ */
+
+unsigned long cpufreq_get_sysfs_value_from_table(unsigned int cpu,
+						 const char **table,
+						 unsigned int index,
+						 unsigned int size);
+
 #ifdef __cplusplus
 }
 #endif