x86: tangier: Add a sysreset driver
This adds a reset driver for tangier processor.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
diff --git a/arch/x86/cpu/tangier/sysreset.c b/arch/x86/cpu/tangier/sysreset.c
new file mode 100644
index 0000000..e762ee1
--- /dev/null
+++ b/arch/x86/cpu/tangier/sysreset.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * Reset driver for tangier processor
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <sysreset.h>
+#include <asm/scu.h>
+
+static int tangier_sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+ int value;
+
+ switch (type) {
+ case SYSRESET_WARM:
+ value = IPCMSG_WARM_RESET;
+ break;
+ case SYSRESET_COLD:
+ value = IPCMSG_COLD_RESET;
+ break;
+ default:
+ return -ENOSYS;
+ }
+
+ scu_ipc_simple_command(value, 0);
+
+ return -EINPROGRESS;
+}
+
+static const struct udevice_id tangier_sysreset_ids[] = {
+ { .compatible = "intel,reset-tangier" },
+ { }
+};
+
+static struct sysreset_ops tangier_sysreset_ops = {
+ .request = tangier_sysreset_request,
+};
+
+U_BOOT_DRIVER(tangier_sysreset) = {
+ .name = "tangier-sysreset",
+ .id = UCLASS_SYSRESET,
+ .of_match = tangier_sysreset_ids,
+ .ops = &tangier_sysreset_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};