linux-kernel - [PATCH v2] platform/x86: pmc_atom: Add Siemens SIMATIC IPC277E to critclk

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Date:   Fri, 20 Sep 2019 15:01:56 +0530
From:   Srikanth Krishnakar <skrishnakar@...il.com>
To:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        dvhart@...radead.org, andy@...radead.org, jan.kiszka@...mens.com
Cc:     Cedric_Hombourger@...tor.com, volker.edenhofer@...mens.com,
        Srikanth_Krishnakar@...tor.com
Subject: [PATCH v2] platform/x86: pmc_atom: Add Siemens SIMATIC IPC277E to critclk_systems DMI table

The SIMATIC IPC277E uses the PMC clock for on-board components
and gets stuck during boot if the clock is disabled. Therefore,
add this device to the critical systems list.

Tested on SIMATIC IPC277E.

Fixes: 648e921888ad ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL")
Reviewed-by: Jan Kiszka <jan.kiszka@...mens.com>
Cc: Cedric Hombourger <Cedric_Hombourger@...tor.com>
Signed-off-by: Srikanth Krishnakar <Srikanth_Krishnakar@...tor.com>
---

Suggested for linux-stable v4.14.x and above.
Depends on ad0d315b4d4e ("platform/x86: pmc_atom: Add Siemens SIMATIC IPC227E to critclk_systems DMI table")

 drivers/platform/x86/pmc_atom.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/platform/x86/pmc_atom.c b/drivers/platform/x86/pmc_atom.c
index 9aca5e7ce6d0..07d1b911e72f 100644
--- a/drivers/platform/x86/pmc_atom.c
+++ b/drivers/platform/x86/pmc_atom.c
@@ -422,6 +422,13 @@ static const struct dmi_system_id critclk_systems[] = {
 			DMI_MATCH(DMI_PRODUCT_VERSION, "6ES7647-8B"),
 		},
 	},
+	{
+		.ident = "SIMATIC IPC277E",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "6AV7882-0"),
+		},
+	},
 	{ /*sentinel*/ }
 };
 
-- 
2.17.1