linux-kernel - [PATCH v4 5/6] hwmon: (k10temp) Don't show temperature limits on Ryzen (Zen) CPUs

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Message-Id: <20200122160800.12560-6-linux@roeck-us.net>
Date:   Wed, 22 Jan 2020 08:07:59 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     linux-hwmon@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Clemens Ladisch <clemens@...isch.de>,
        Jean Delvare <jdelvare@...e.com>,
        Brad Campbell <lists2009@...rfbargle.com>,
        Ondrej Čerman <ocerman@...1.eu>,
        Bernhard Gebetsberger <bernhard.gebetsberger@....at>,
        Holger Kiehl <Holger.Kiehl@....de>,
        Michael Larabel <michael@...ronix.com>,
        Jonathan McDowell <noodles@...th.li>,
        Ken Moffat <zarniwhoop73@...glemail.com>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        Darren Salt <devspam@...eofthesa.me.uk>,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH v4 5/6] hwmon: (k10temp) Don't show temperature limits on Ryzen (Zen) CPUs

The maximum Tdie or Tctl is not published for Ryzen CPUs. What is
known, however, is that the traditional value of 70 degrees C is no
longer correct. On top of that, the limit applies to Tctl, not to Tdie.
Displaying it in either context is meaningless, confusing, and wrong.
Stop doing it.

Tested-by: Brad Campbell <lists2009@...rfbargle.com>
Tested-by: Holger Kiehl <holger.kiehl@....de>
Tested-by: Michael Larabel <michael@...ronix.com>
Tested-by: Jonathan McDowell <noodles@...th.li>
Tested-by: Ken Moffat <zarniwhoop73@...glemail.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/hwmon/k10temp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c
index b961e12c6f58..4a470b5195ee 100644
--- a/drivers/hwmon/k10temp.c
+++ b/drivers/hwmon/k10temp.c
@@ -355,7 +355,7 @@ static umode_t k10temp_is_visible(const void *_data,
 			}
 			break;
 		case hwmon_temp_max:
-			if (channel)
+			if (channel || data->show_tdie)
 				return 0;
 			break;
 		case hwmon_temp_crit:
-- 
2.17.1