soc/tegra: fuse: Add Tegra186 support

Tegra210 and Tegra186 are mostly compatible from a fuses point of view.
However, speedo support is implemented in the BPMP firmware, hence the
implementation needs to be skipped in the fuses driver.

Signed-off-by: Timo Alho <talho@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
[treding@nvidia.com: reword commit message]
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/soc/tegra/fuse/fuse-tegra.c

@@ -103,6 +103,9 @@ static struct tegra_fuse *fuse = &(struct tegra_fuse) {
 };
 
 static const struct of_device_id tegra_fuse_match[] = {
+#ifdef CONFIG_ARCH_TEGRA_186_SOC
+	{ .compatible = "nvidia,tegra186-efuse", .data = &tegra186_fuse_soc },
+#endif
 #ifdef CONFIG_ARCH_TEGRA_210_SOC
 	{ .compatible = "nvidia,tegra210-efuse", .data = &tegra210_fuse_soc },
 #endif

drivers/soc/tegra/fuse/fuse-tegra30.c

@@ -46,7 +46,8 @@
     defined(CONFIG_ARCH_TEGRA_114_SOC) || \
     defined(CONFIG_ARCH_TEGRA_124_SOC) || \
     defined(CONFIG_ARCH_TEGRA_132_SOC) || \
-    defined(CONFIG_ARCH_TEGRA_210_SOC)
+    defined(CONFIG_ARCH_TEGRA_210_SOC) || \
+    defined(CONFIG_ARCH_TEGRA_186_SOC)
 static u32 tegra30_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset)
 {
 	return readl_relaxed(fuse->base + FUSE_BEGIN + offset);
@@ -98,7 +99,10 @@ static void __init tegra30_fuse_init(struct tegra_fuse *fuse)
 	fuse->read = tegra30_fuse_read;
 
 	tegra_init_revision();
-	fuse->soc->speedo_init(&tegra_sku_info);
+
+	if (fuse->soc->speedo_init)
+		fuse->soc->speedo_init(&tegra_sku_info);
+
 	tegra30_fuse_add_randomness();
 }
 #endif
@@ -158,3 +162,16 @@ const struct tegra_fuse_soc tegra210_fuse_soc = {
 	.info = &tegra210_fuse_info,
 };
 #endif
+
+#if defined(CONFIG_ARCH_TEGRA_186_SOC)
+static const struct tegra_fuse_info tegra186_fuse_info = {
+	.read = tegra30_fuse_read,
+	.size = 0x300,
+	.spare = 0x280,
+};
+
+const struct tegra_fuse_soc tegra186_fuse_soc = {
+	.init = tegra30_fuse_init,
+	.info = &tegra186_fuse_info,
+};
+#endif

drivers/soc/tegra/fuse/fuse.h

@@ -105,4 +105,8 @@ extern const struct tegra_fuse_soc tegra124_fuse_soc;
 extern const struct tegra_fuse_soc tegra210_fuse_soc;
 #endif
 
+#ifdef CONFIG_ARCH_TEGRA_186_SOC
+extern const struct tegra_fuse_soc tegra186_fuse_soc;
+#endif
+
 #endif