linux-kernel - [PATCH] platform/chrome: cros_ec_lpc: Add DMI definition for post-Skylake machines running custom Coreboot builds

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Date:   Fri, 21 Jul 2023 00:37:15 +0200
From:   Alicja Michalska <ahplka19@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     robbarnes@...gle.com, lalithkraj@...gle.com, rrangel@...omium.org,
        bleung@...omium.org, groeck@...omium.org,
        chrome-platform@...ts.linux.dev
Subject: [PATCH] platform/chrome: cros_ec_lpc: Add DMI definition for
 post-Skylake machines running custom Coreboot builds

ChromeOS EC LPC lacks DMI match for newer machines, which
use "Google" DMI_SYS_VENDOR as opposed to "GOOGLE" in older models.
This patch adds DMI definition for MrChomebox's custom Coreboots builds,
which we (Chrultrabook Project) are using.

Signed-off-by: Alicja Michalska <ahplka19@...il.com>
---
 drivers/platform/chrome/cros_ec_lpc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index 500a61b093e4..6ac993be4eb1 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -533,6 +533,14 @@ static const struct dmi_system_id cros_ec_lpc_dmi_table[] __initconst = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Glimmer"),
 		},
 	},
+	/* DMI doesn't match modern machines running custom firmware */
+	{
+		/* MrChromebox's firmware */
+		.matches = {
+			DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
+			DMI_MATCH(DMI_BIOS_VERSION, "MrChromebox-"),
+		},
+	},
 	/* A small number of non-Chromebook/box machines also use the ChromeOS EC */
 	{
 		/* the Framework Laptop */
-- 
2.41.0