linux-kernel - [PATCH] platform/x86: pmc_atom: Add Lex 3I380NX industrial PC to critclk

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Date:   Tue, 19 Jul 2022 14:48:31 +0200
From:   Paul Spooren <paul.spooren@...bo.com>
To:     Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Paul Spooren <paul.spooren@...bo.com>,
        Michael Schöne <michael.schoene@...bo.com>
Subject: [PATCH] platform/x86: pmc_atom: Add Lex 3I380NX industrial PC to critclk_systems DMI table

The Lex 3I380NX industrial PC has 4 ethernet controllers on board
which need pmc_plt_clk0 - 3 to function, add it to the critclk_systems
DMI table, so that drivers/clk/x86/clk-pmc-atom.c will mark the clocks
as CLK_CRITICAL and they will not get turned off.

This commit is nearly redundant to 3d0818f5eba8 ("platform/x86:
pmc_atom: Add Lex 3I380D industrial PC to critclk_systems DMI table")
but for the 3I380NX device.

The original vendor firmware is only available using the WaybackMachine:
http://www.lex.com.tw/products/3I380NX.html

Signed-off-by: Michael Schöne <michael.schoene@...bo.com>
Signed-off-by: Paul Spooren <paul.spooren@...bo.com>
---
 drivers/platform/x86/pmc_atom.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/platform/x86/pmc_atom.c b/drivers/platform/x86/pmc_atom.c
index b8b1ed1406de..15973a400e43 100644
--- a/drivers/platform/x86/pmc_atom.c
+++ b/drivers/platform/x86/pmc_atom.c
@@ -397,6 +397,15 @@ static const struct dmi_system_id critclk_systems[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "3I380D"),
 		},
 	},
+	{
+		/* pmc_plt_clk0 - 3 are used for the 4 ethernet controllers */
+		.ident = "Lex 3I380NX",
+		.callback = dmi_callback,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Lex BayTrail"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "3I380NX"),
+		},
+	},
 	{
 		/* pmc_plt_clk* - are used for ethernet controllers */
 		.ident = "Lex 2I385SW",
-- 
2.32.1 (Apple Git-133)