linux-kernel - [PATCH v1] hwmon, via-cputem: support new centaur CPUs

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Date:   Thu, 29 Mar 2018 14:36:43 +0800
From:   David Wang <davidwang@...oxin.com>
To:     <jdelvare@...e.com>, <linux@...ck-us.net>, <tglx@...utronix.de>,
        <mingo@...hat.com>, <rjw@...ysocki.net>,
        <linux-hwmon@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <brucechang@...-alliance.com>, <cooperyan@...oxin.com>,
        <qiyuanwang@...oxin.com>, <benjaminpan@...tech.com>,
        <lukelin@...cpu.com>, <timguo@...oxin.com>,
        David Wang <davidwang@...oxin.com>
Subject: [PATCH v1] hwmon, via-cputem: support new centaur CPUs

Newer centaur CPUs(Family == 7) also support this cpu temperature sensor.

Signed-off-by: David Wang <davidwang@...oxin.com>
---
 drivers/hwmon/via-cputemp.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/hwmon/via-cputemp.c b/drivers/hwmon/via-cputemp.c
index 07a0cb0..2f5bd50 100644
--- a/drivers/hwmon/via-cputemp.c
+++ b/drivers/hwmon/via-cputemp.c
@@ -136,6 +136,11 @@ static int via_cputemp_probe(struct platform_device *pdev)
 	data->id = pdev->id;
 	data->name = "via_cputemp";
 
+	if (c->x86 == 7) {
+		data->msr_temp = 0x1423;
+		goto test_access;
+	}
+
 	switch (c->x86_model) {
 	case 0xA:
 		/* C7 A */
@@ -152,6 +157,7 @@ static int via_cputemp_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+test_access:
 	/* test if we can access the TEMPERATURE MSR */
 	err = rdmsr_safe_on_cpu(data->id, data->msr_temp, &eax, &edx);
 	if (err) {
@@ -283,6 +289,7 @@ static int via_cputemp_down_prep(unsigned int cpu)
 	{ X86_VENDOR_CENTAUR, 6, 0xa, }, /* C7 A */
 	{ X86_VENDOR_CENTAUR, 6, 0xd, }, /* C7 D */
 	{ X86_VENDOR_CENTAUR, 6, 0xf, }, /* Nano */
+	{ X86_VENDOR_CENTAUR, 7, X86_MODEL_ANY, },
 	{}
 };
 MODULE_DEVICE_TABLE(x86cpu, cputemp_ids);
-- 
1.9.1