linux-kernel - [PATCH v2 3/6] cpupower: Restore format of frequency-info limit

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Message-Id: <9f3d11fc1f75e2589aee67cbafac6ead3adf0f23.1484147115.git.shorne@gmail.com>
Date:   Thu, 12 Jan 2017 00:16:04 +0900
From:   Stafford Horne <shorne@...il.com>
To:     Shuah Khan <shuah@...nel.org>, Darren Hart <dvhart@...ux.intel.com>
Cc:     Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        Stafford Horne <shorne@...il.com>,
        Thomas Renninger <trenn@...e.com>,
        "Shreyas B. Prabhu" <shreyas@...ux.vnet.ibm.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        linux-pm@...r.kernel.org
Subject: [PATCH v2 3/6] cpupower: Restore format of frequency-info limit

The intel_pstate kselftest expects that the output of
`cpupower frequency-info -l | tail -1 | awk ' { print $1 } '`
to get frequency limits.  This does not work after the following two
changes.

 - 562e5f1a3: rework the "cpupower frequency-info" command
   (Jacob Tanenbaum) removed parsable limit output
 - ce512b840: Do not analyse offlined cpus
   (Thomas Renninger) added newline to break limit parsing more

This change preserves human readable output if wanted as well as
parsable output for scripts/tests.

Cc: Thomas Renninger <trenn@...e.com>
Cc: "Shreyas B. Prabhu" <shreyas@...ux.vnet.ibm.com>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Cc: linux-pm@...r.kernel.org
Signed-off-by: Stafford Horne <shorne@...il.com>
---
 tools/power/cpupower/utils/cpufreq-info.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/tools/power/cpupower/utils/cpufreq-info.c b/tools/power/cpupower/utils/cpufreq-info.c
index 590d12a..3e701f0 100644
--- a/tools/power/cpupower/utils/cpufreq-info.c
+++ b/tools/power/cpupower/utils/cpufreq-info.c
@@ -285,20 +285,24 @@ static int get_freq_hardware(unsigned int cpu, unsigned int human)
 
 /* --hwlimits / -l */
 
-static int get_hardware_limits(unsigned int cpu)
+static int get_hardware_limits(unsigned int cpu, unsigned int human)
 {
 	unsigned long min, max;
 
-	printf(_("  hardware limits: "));
 	if (cpufreq_get_hardware_limits(cpu, &min, &max)) {
 		printf(_("Not Available\n"));
 		return -EINVAL;
 	}
 
-	print_speed(min);
-	printf(" - ");
-	print_speed(max);
-	printf("\n");
+	if (human) {
+		printf(_("  hardware limits: "));
+		print_speed(min);
+		printf(" - ");
+		print_speed(max);
+		printf("\n");
+	} else {
+		printf("%lu %lu\n", min, max);
+	}
 	return 0;
 }
 
@@ -456,7 +460,7 @@ static void debug_output_one(unsigned int cpu)
 	get_related_cpus(cpu);
 	get_affected_cpus(cpu);
 	get_latency(cpu, 1);
-	get_hardware_limits(cpu);
+	get_hardware_limits(cpu, 1);
 
 	freqs = cpufreq_get_available_frequencies(cpu);
 	if (freqs) {
@@ -622,7 +626,7 @@ int cmd_freq_info(int argc, char **argv)
 			ret = get_driver(cpu);
 			break;
 		case 'l':
-			ret = get_hardware_limits(cpu);
+			ret = get_hardware_limits(cpu, human);
 			break;
 		case 'w':
 			ret = get_freq_hardware(cpu, human);
@@ -639,7 +643,6 @@ int cmd_freq_info(int argc, char **argv)
 		}
 		if (ret)
 			return ret;
-		printf("\n");
 	}
 	return ret;
 }
-- 
2.9.3