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path: root/drivers/timer/sandbox_timer.c
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Diffstat (limited to 'drivers/timer/sandbox_timer.c')
-rw-r--r--drivers/timer/sandbox_timer.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/timer/sandbox_timer.c b/drivers/timer/sandbox_timer.c
new file mode 100644
index 0000000..38de763
--- /dev/null
+++ b/drivers/timer/sandbox_timer.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <timer.h>
+#include <os.h>
+
+/* system timer offset in ms */
+static unsigned long sandbox_timer_offset;
+
+void sandbox_timer_add_offset(unsigned long offset)
+{
+ sandbox_timer_offset += offset;
+}
+
+static int sandbox_timer_get_count(struct udevice *dev, unsigned long *count)
+{
+ *count = os_get_nsec() / 1000 + sandbox_timer_offset * 1000;
+
+ return 0;
+}
+
+static int sandbox_timer_probe(struct udevice *dev)
+{
+ struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+
+ uc_priv->clock_rate = 1000000;
+
+ return 0;
+}
+
+static const struct timer_ops sandbox_timer_ops = {
+ .get_count = sandbox_timer_get_count,
+};
+
+static const struct udevice_id sandbox_timer_ids[] = {
+ { .compatible = "sandbox,timer" },
+ { }
+};
+
+U_BOOT_DRIVER(sandbox_timer) = {
+ .name = "sandbox_timer",
+ .id = UCLASS_TIMER,
+ .of_match = sandbox_timer_ids,
+ .probe = sandbox_timer_probe,
+ .ops = &sandbox_timer_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};