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From:   Jan Kiszka <jan.kiszka@siemens.com>
Subject: [PATCH] platform/x86: pmc_atom: Add Siemens SIMATIC IPC227E to
To:     Darren Hart <dvhart@infradead.org>,
        Andy Shevchenko <andy@infradead.org>,
        platform-driver-x86@vger.kernel.org
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Message-ID: <ddaeca63-eae8-e466-5c30-6e194b251bbb@siemens.com>
Date:   Wed, 4 Sep 2019 08:18:03 +0200
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From: Jan Kiszka <jan.kiszka@siemens.com>

The SIMATIC IPC227E 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.

Fixes: 648e921888ad ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL")
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---

Should go into stable as well, down to 4.19.

 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 aa53648a2214..9aca5e7ce6d0 100644
--- a/drivers/platform/x86/pmc_atom.c
+++ b/drivers/platform/x86/pmc_atom.c
@@ -415,6 +415,13 @@ static const struct dmi_system_id critclk_systems[] = {
 			DMI_MATCH(DMI_BOARD_NAME, "CB6363"),
 		},
 	},
+	{
+		.ident = "SIMATIC IPC227E",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "6ES7647-8B"),
+		},
+	},
 	{ /*sentinel*/ }
 };
 
-- 

2.16.4


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