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 a combination of the
platform name and the chip revision for silicon platforms, and simply
with the platform name on pre-silicon platforms.
Signed-off-by: Kartik <kkartik@nvidia.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

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",
+	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;
 

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)

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