riscv: Move Andes PLMT driver to drivers/timer
This is a regular timer driver, and should live with the other timer
drivers.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
index f8fa4aa..6b8e4c9 100644
--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -53,6 +53,13 @@
Select this to enable a timer for Altera devices. Please find
details on the "Embedded Peripherals IP User Guide" of Altera.
+config ANDES_PLMT
+ bool
+ depends on RISCV_MMODE || SPL_RISCV_MMODE
+ help
+ The Andes PLMT block holds memory-mapped mtime register
+ associated with timer tick.
+
config ARC_TIMER
bool "ARC timer support"
depends on TIMER && ARC && CLK
diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile
index 3a4d74b..dd4f9cc 100644
--- a/drivers/timer/Makefile
+++ b/drivers/timer/Makefile
@@ -5,6 +5,7 @@
obj-y += timer-uclass.o
obj-$(CONFIG_AG101P_TIMER) += ag101p_timer.o
obj-$(CONFIG_ALTERA_TIMER) += altera_timer.o
+obj-$(CONFIG_ANDES_PLMT) += andes_plmt_timer.o
obj-$(CONFIG_ARC_TIMER) += arc_timer.o
obj-$(CONFIG_AST_TIMER) += ast_timer.o
obj-$(CONFIG_ATCPIT100_TIMER) += atcpit100_timer.o
diff --git a/drivers/timer/andes_plmt_timer.c b/drivers/timer/andes_plmt_timer.c
new file mode 100644
index 0000000..cec8671
--- /dev/null
+++ b/drivers/timer/andes_plmt_timer.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019, Rick Chen <rick@andestech.com>
+ * Copyright (C) 2020, Sean Anderson <seanga2@gmail.com>
+ *
+ * U-Boot syscon driver for Andes's Platform Level Machine Timer (PLMT).
+ * The PLMT block holds memory-mapped mtime register
+ * associated with timer tick.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <timer.h>
+#include <asm/io.h>
+#include <linux/err.h>
+
+/* mtime register */
+#define MTIME_REG(base) ((ulong)(base))
+
+static u64 andes_plmt_get_count(struct udevice *dev)
+{
+ return readq((void __iomem *)MTIME_REG(dev->priv));
+}
+
+static const struct timer_ops andes_plmt_ops = {
+ .get_count = andes_plmt_get_count,
+};
+
+static int andes_plmt_probe(struct udevice *dev)
+{
+ dev->priv = dev_read_addr_ptr(dev);
+ if (!dev->priv)
+ return -EINVAL;
+
+ return timer_timebase_fallback(dev);
+}
+
+static const struct udevice_id andes_plmt_ids[] = {
+ { .compatible = "riscv,plmt0" },
+ { }
+};
+
+U_BOOT_DRIVER(andes_plmt) = {
+ .name = "andes_plmt",
+ .id = UCLASS_TIMER,
+ .of_match = andes_plmt_ids,
+ .ops = &andes_plmt_ops,
+ .probe = andes_plmt_probe,
+ .flags = DM_FLAG_PRE_RELOC,
+};