linux-kernel - [PATCH v3] soc/tegra: fuse: use platform info with soc revision

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Date:   Wed, 9 Nov 2022 19:50:22 +0530
From:   Kartik <kkartik@...dia.com>
To:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <kkartik@...dia.com>, <digetx@...il.com>,
        <ndesaulniers@...gle.com>, <ulf.hansson@...aro.org>,
        <arnd@...db.de>, <skamble@...dia.com>, <windhl@....com>,
        <sumitg@...dia.com>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v3] soc/tegra: fuse: use platform info with soc revision

Tegra pre-silicon platforms do not have chip revisions. This makes the
revision soc attribute meaningless on these platforms.

Instead, populate the revision soc attribute with
"platform name + chip revision" for Silicon. For pre-silicon platforms
populate it with "platform name" instead.

Signed-off-by: Kartik <kkartik@...dia.com>
---
v2->v3
 * Cosmetic Changes.
v1->v2
 * Updated commit message.

 drivers/soc/tegra/fuse/fuse-tegra.c    | 22 ++++++++++++++++++++--
 drivers/soc/tegra/fuse/tegra-apbmisc.c |  1 +
 include/soc/tegra/fuse.h               | 15 +++++++++++++++
 3 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
index ea25a1dcafc2..f02953f793e9 100644
--- a/drivers/soc/tegra/fuse/fuse-tegra.c
+++ b/drivers/soc/tegra/fuse/fuse-tegra.c
@@ -35,6 +35,19 @@ static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
 	[TEGRA_REVISION_A04]     = "A04",
 };
 
+static const char *tegra_platform_name[TEGRA_PLATFORM_MAX] = {
+	[TEGRA_PLATFORM_SILICON]			= "Silicon",
+	[TEGRA_PLATFORM_QT]				= "QT",
+	[TEGRA_PLATFORM_SYSTEM_FPGA]			= "System FPGA",
+	[TEGRA_PLATFORM_UNIT_FPGA]			= "Unit FPGA",
+	[TEGRA_PLATFORM_ASIM_QT]			= "Asim QT",
+	[TEGRA_PLATFORM_ASIM_LINSIM]			= "Asim Linsim",
+	[TEGRA_PLATFORM_DSIM_ASIM_LINSIM]		= "Dsim Asim Linsim",
+	[TEGRA_PLATFORM_VERIFICATION_SIMULATION]	= "Verification Simulation",
+	[TEGRA_PLATFORM_VDK]				= "VDK",
+	[TEGRA_PLATFORM_VSP]				= "VSP",
+};
+
 static const struct of_device_id car_match[] __initconst = {
 	{ .compatible = "nvidia,tegra20-car", },
 	{ .compatible = "nvidia,tegra30-car", },
@@ -370,8 +383,13 @@ struct device * __init tegra_soc_device_register(void)
 		return NULL;
 
 	attr->family = kasprintf(GFP_KERNEL, "Tegra");
-	attr->revision = kasprintf(GFP_KERNEL, "%s",
-		tegra_revision_name[tegra_sku_info.revision]);
+	if (tegra_is_silicon())
+		attr->revision = kasprintf(GFP_KERNEL, "%s %s",
+					   tegra_platform_name[tegra_sku_info.platform],
+					   tegra_revision_name[tegra_sku_info.revision]);
+	else
+		attr->revision = kasprintf(GFP_KERNEL, "%s",
+					   tegra_platform_name[tegra_sku_info.platform]);
 	attr->soc_id = kasprintf(GFP_KERNEL, "%u", tegra_get_chip_id());
 	attr->custom_attr_group = fuse->soc->soc_attr_group;
 
diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c
index 3351bd872ab2..4591c5bcb690 100644
--- a/drivers/soc/tegra/fuse/tegra-apbmisc.c
+++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c
@@ -156,6 +156,7 @@ void __init tegra_init_revision(void)
 	}
 
 	tegra_sku_info.sku_id = tegra_fuse_read_early(FUSE_SKU_INFO);
+	tegra_sku_info.platform = tegra_get_platform();
 }
 
 void __init tegra_init_apbmisc(void)
diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h
index 977c334136e9..a63de5da8124 100644
--- a/include/soc/tegra/fuse.h
+++ b/include/soc/tegra/fuse.h
@@ -34,6 +34,20 @@ enum tegra_revision {
 	TEGRA_REVISION_MAX,
 };
 
+enum tegra_platform {
+	TEGRA_PLATFORM_SILICON = 0,
+	TEGRA_PLATFORM_QT,
+	TEGRA_PLATFORM_SYSTEM_FPGA,
+	TEGRA_PLATFORM_UNIT_FPGA,
+	TEGRA_PLATFORM_ASIM_QT,
+	TEGRA_PLATFORM_ASIM_LINSIM,
+	TEGRA_PLATFORM_DSIM_ASIM_LINSIM,
+	TEGRA_PLATFORM_VERIFICATION_SIMULATION,
+	TEGRA_PLATFORM_VDK,
+	TEGRA_PLATFORM_VSP,
+	TEGRA_PLATFORM_MAX,
+};
+
 struct tegra_sku_info {
 	int sku_id;
 	int cpu_process_id;
@@ -47,6 +61,7 @@ struct tegra_sku_info {
 	int gpu_speedo_id;
 	int gpu_speedo_value;
 	enum tegra_revision revision;
+	enum tegra_platform platform;
 };
 
 #ifdef CONFIG_ARCH_TEGRA
-- 
2.17.1