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-rw-r--r--doc/device-tree-bindings/sysreset/ti,sci-sysreset.txt29
-rw-r--r--drivers/sysreset/Kconfig7
-rw-r--r--drivers/sysreset/Makefile1
-rw-r--r--drivers/sysreset/sysreset-ti-sci.c73
4 files changed, 110 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/sysreset/ti,sci-sysreset.txt b/doc/device-tree-bindings/sysreset/ti,sci-sysreset.txt
new file mode 100644
index 0000000000..02704c6487
--- /dev/null
+++ b/doc/device-tree-bindings/sysreset/ti,sci-sysreset.txt
@@ -0,0 +1,29 @@
+Texas Instruments TI SCI System Reset Controller
+================================================
+
+Some TI SoCs contain a system controller (like the SYSFW, etc...) that is
+responsible for controlling the state of the IPs that are present.
+Communication between the host processor running an OS and the system
+controller happens through a protocol known as TI SCI [1].
+
+[1] http://processors.wiki.ti.com/index.php/TISCI
+
+System Reset Controller Node
+============================
+The sysreset controller node represents the reset for the overall SoC
+which is managed by the SYSFW. Because this relies on the TI SCI protocol
+to communicate with the SYSFW it must be a child of the sysfw node.
+
+Required Properties:
+--------------------
+ - compatible: Must be "ti,sci-sysreset"
+
+Example (AM65x):
+----------------
+ sysfw: sysfw {
+ compatible = "ti,am654-system-controller";
+ ...
+ k3_sysreset: sysreset-controller {
+ compatible = "ti,sci-sysreset";
+ };
+ };
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index 9b2fda4d25..ed1d437fb0 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -36,6 +36,13 @@ config SYSRESET_PSCI
Enable PSCI SYSTEM_RESET function call. To use this, PSCI firmware
must be running on your system.
+config SYSRESET_TI_SCI
+ bool "TI System Control Interface (TI SCI) system reset driver"
+ depends on TI_SCI_PROTOCOL
+ help
+ This enables the system reset driver support over TI System Control
+ Interface available on some new TI's SoCs.
+
endif
config SYSRESET_SYSCON
diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index 707f1d7469..02ee1df6b0 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_SYSRESET) += sysreset-uclass.o
obj-$(CONFIG_SYSRESET_GPIO) += sysreset_gpio.o
obj-$(CONFIG_SYSRESET_MICROBLAZE) += sysreset_microblaze.o
obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o
+obj-$(CONFIG_SYSRESET_TI_SCI) += sysreset-ti-sci.o
obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o
obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o
obj-$(CONFIG_SYSRESET_X86) += sysreset_x86.o
diff --git a/drivers/sysreset/sysreset-ti-sci.c b/drivers/sysreset/sysreset-ti-sci.c
new file mode 100644
index 0000000000..890a607c4b
--- /dev/null
+++ b/drivers/sysreset/sysreset-ti-sci.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Texas Instruments System Control Interface (TI SCI) system reset driver
+ *
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ * Andreas Dannenberg <dannenberg@ti.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <linux/soc/ti/ti_sci_protocol.h>
+
+/**
+ * struct ti_sci_sysreset_data - sysreset controller information structure
+ * @sci: TI SCI handle used for communication with system controller
+ */
+struct ti_sci_sysreset_data {
+ const struct ti_sci_handle *sci;
+};
+
+static int ti_sci_sysreset_probe(struct udevice *dev)
+{
+ struct ti_sci_sysreset_data *data = dev_get_priv(dev);
+
+ debug("%s(dev=%p)\n", __func__, dev);
+
+ if (!data)
+ return -ENOMEM;
+
+ /* Store handle for communication with the system controller */
+ data->sci = ti_sci_get_handle(dev);
+ if (IS_ERR(data->sci))
+ return PTR_ERR(data->sci);
+
+ return 0;
+}
+
+static int ti_sci_sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+ struct ti_sci_sysreset_data *data = dev_get_priv(dev);
+ const struct ti_sci_handle *sci = data->sci;
+ const struct ti_sci_core_ops *cops = &sci->ops.core_ops;
+ int ret;
+
+ debug("%s(dev=%p, type=%d)\n", __func__, dev, type);
+
+ ret = cops->reboot_device(sci);
+ if (ret)
+ dev_err(rst->dev, "%s: reboot_device failed (%d)\n",
+ __func__, ret);
+
+ return ret;
+}
+
+static struct sysreset_ops ti_sci_sysreset_ops = {
+ .request = ti_sci_sysreset_request,
+};
+
+static const struct udevice_id ti_sci_sysreset_of_match[] = {
+ { .compatible = "ti,sci-sysreset", },
+ { /* sentinel */ },
+};
+
+U_BOOT_DRIVER(ti_sci_sysreset) = {
+ .name = "ti-sci-sysreset",
+ .id = UCLASS_SYSRESET,
+ .of_match = ti_sci_sysreset_of_match,
+ .probe = ti_sci_sysreset_probe,
+ .priv_auto_alloc_size = sizeof(struct ti_sci_sysreset_data),
+ .ops = &ti_sci_sysreset_ops,
+};