1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/sysreset/sysreset_cv1800b.c b/drivers/sysreset/sysreset_cv1800b.c
new file mode 100644
index 00000000000..9cd62772ef4
--- /dev/null
+++ b/drivers/sysreset/sysreset_cv1800b.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2024, Kongyang Liu <seashell11234455@gmail.com>
+ */
+
+#include <dm.h>
+#include <stdbool.h>
+#include <sysreset.h>
+#include <wait_bit.h>
+#include <linux/io.h>
+#include <linux/errno.h>
+
+#define REG_RTC_BASE             (void *)0x05026000
+#define REG_RTC_CTRL_BASE        (void *)0x05025000
+#define REG_RTC_EN_SHDN_REQ      (REG_RTC_BASE + 0xc0)
+#define REG_RTC_EN_PWR_CYC_REQ   (REG_RTC_BASE + 0xc8)
+#define REG_RTC_EN_WARM_RST_REQ  (REG_RTC_BASE + 0xcc)
+#define REG_RTC_CTRL_UNLOCKKEY   (REG_RTC_CTRL_BASE + 0x4)
+#define REG_RTC_CTRL             (REG_RTC_CTRL_BASE + 0x8)
+
+#define CTRL_UNLOCKKEY_MAGIC     0xAB18
+
+/* REG_RTC_CTRL */
+#define BIT_REQ_SHDN       BIT(0)
+#define BIT_REQ_PWR_CYC    BIT(3)
+#define BIT_REQ_WARM_RST   BIT(4)
+
+static struct {
+	void *pre_req_reg;
+	u32 req_bit;
+} reset_info[SYSRESET_COUNT] = {
+	[SYSRESET_WARM]      = { REG_RTC_EN_WARM_RST_REQ, BIT_REQ_WARM_RST },
+	[SYSRESET_COLD]      = { REG_RTC_EN_WARM_RST_REQ, BIT_REQ_WARM_RST },
+	[SYSRESET_POWER]     = { REG_RTC_EN_PWR_CYC_REQ, BIT_REQ_PWR_CYC },
+	[SYSRESET_POWER_OFF] = { REG_RTC_EN_SHDN_REQ, BIT_REQ_SHDN },
+};
+
+static int cv1800b_sysreset_request(struct udevice *dev, enum sysreset_t type)
+{
+	u32 reg;
+
+	writel(1, reset_info[type].pre_req_reg);
+	writel(CTRL_UNLOCKKEY_MAGIC, REG_RTC_CTRL_UNLOCKKEY);
+	reg = readl(REG_RTC_CTRL);
+	writel(0xFFFF0800 | reset_info[type].req_bit, REG_RTC_CTRL);
+
+	return -EINPROGRESS;
+}
+
+static struct sysreset_ops cv1800b_sysreset = {
+	.request = cv1800b_sysreset_request,
+};
+
+static const struct udevice_id cv1800b_sysreset_ids[] = {
+	{ .compatible = "sophgo,cv1800b-sysreset", },
+	{},
+};
+
+U_BOOT_DRIVER(sysreset_cv1800b) = {
+	.name = "cv1800b_sysreset",
+	.id	  = UCLASS_SYSRESET,
+	.ops  = &cv1800b_sysreset,
+	.of_match = cv1800b_sysreset_ids
+};