linux-kernel - [PATCH v1 5/8] x86/quirks: Add a DMI quirk for Microsoft Surface 3

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Date:   Fri, 17 Jan 2020 19:56:23 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-rtc@...r.kernel.org,
        "Guilherme G . Piccoli" <gpiccoli@...onical.com>,
        linux-kernel@...r.kernel.org
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>, alsa-devel@...a-project.org
Subject: [PATCH v1 5/8] x86/quirks: Add a DMI quirk for Microsoft Surface 3

Add a DMI quirk for Microsoft Surface 3 which will be utilized by few drivers.

Cc: Cezary Rojewski <cezary.rojewski@...el.com>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc: Liam Girdwood <liam.r.girdwood@...ux.intel.com>
Cc: Jie Yang <yang.jie@...ux.intel.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: alsa-devel@...a-project.org
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 arch/x86/kernel/quirks.c                  | 16 ++++++++++++++++
 include/linux/platform_data/x86/machine.h |  5 +++++
 2 files changed, 21 insertions(+)

diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index 447d4fba8516..9574ef7eaa66 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -673,6 +673,15 @@ static int apple_machine_cb(const struct dmi_system_id *id)
 	return 1;
 }
 
+bool x86_microsoft_surface_3_machine;
+EXPORT_SYMBOL(x86_microsoft_surface_3_machine);
+
+static int microsoft_surface_3_machine_cb(const struct dmi_system_id *id)
+{
+	x86_microsoft_surface_3_machine = true;
+	return 1;
+}
+
 static const struct dmi_system_id x86_machine_table[] = {
 	{
 		.ident = "x86 Apple Macintosh",
@@ -688,6 +697,13 @@ static const struct dmi_system_id x86_machine_table[] = {
 		},
 		.callback = apple_machine_cb,
 	},
+	{
+		.ident = "Microsoft Surface 3",
+		.matches = {
+			DMI_MATCH(DMI_PRODUCT_NAME, "Surface 3"),
+		},
+		.callback = microsoft_surface_3_machine_cb,
+	},
 	{}
 };
 
diff --git a/include/linux/platform_data/x86/machine.h b/include/linux/platform_data/x86/machine.h
index b1e7a560a046..9bdf5a06b490 100644
--- a/include/linux/platform_data/x86/machine.h
+++ b/include/linux/platform_data/x86/machine.h
@@ -8,8 +8,13 @@
  * x86_apple_machine - whether the machine is an x86 Apple Macintosh
  */
 extern bool x86_apple_machine;
+/**
+ * x86_microsoft_surface_3_machine - whether the machine is Microsoft Surface 3
+ */
+extern bool x86_microsoft_surface_3_machine;
 #else
 #define x86_apple_machine			false
+#define x86_microsoft_surface_3_machine		false
 #endif
 
 #endif	/* PLATFORM_DATA_X86_MACHINE_H */
-- 
2.24.1