Merge branch '2023-11-03-assorted-tegra-improvements'

- Assorted improvements for Tegra platforms

1 files changed, 45 insertions, 0 deletions

diff --git a/drivers/sysreset/sysreset_tegra.c b/drivers/sysreset/sysreset_tegra.c
new file mode 100644
index 00000000000..10bcd3a1873
--- /dev/null
+++ b/drivers/sysreset/sysreset_tegra.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <dm.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <linux/err.h>
+#include <asm/arch-tegra/pmc.h>
+
+static int tegra_sysreset_request(struct udevice *dev,
+				  enum sysreset_t type)
+{
+	u32 value;
+
+	switch (type) {
+	case SYSRESET_WARM:
+	case SYSRESET_COLD:
+		/* resets everything but scratch 0 and reset status */
+		value = tegra_pmc_readl(PMC_CNTRL);
+		value |= PMC_CNTRL_MAIN_RST;
+		tegra_pmc_writel(value, PMC_CNTRL);
+		break;
+	default:
+		return -EPROTONOSUPPORT;
+	}
+
+	return -EINPROGRESS;
+}
+
+static struct sysreset_ops tegra_sysreset = {
+	.request = tegra_sysreset_request,
+};
+
+U_BOOT_DRIVER(sysreset_tegra) = {
+	.id	= UCLASS_SYSRESET,
+	.name	= "sysreset_tegra",
+	.ops	= &tegra_sysreset,
+};
+
+/* Link to Tegra PMC once there is a driver */
+U_BOOT_DRVINFO(sysreset_tegra) = {
+	.name = "sysreset_tegra"
+};