timer: add orion-timer support
Add timer support for Kirkwood and MVEBU devices.
Cc: Pali Rohár <pali@kernel.org>
Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/timer/orion-timer.c b/drivers/timer/orion-timer.c
new file mode 100644
index 0000000..fd30e1b
--- /dev/null
+++ b/drivers/timer/orion-timer.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0+
+#include <asm/io.h>
+#include <common.h>
+#include <dm/device.h>
+#include <dm/fdtaddr.h>
+#include <timer.h>
+
+#define TIMER_CTRL 0x00
+#define TIMER0_EN BIT(0)
+#define TIMER0_RELOAD_EN BIT(1)
+#define TIMER0_RELOAD 0x10
+#define TIMER0_VAL 0x14
+
+struct orion_timer_priv {
+ void *base;
+};
+
+static uint64_t orion_timer_get_count(struct udevice *dev)
+{
+ struct orion_timer_priv *priv = dev_get_priv(dev);
+
+ return ~readl(priv->base + TIMER0_VAL);
+}
+
+static int orion_timer_probe(struct udevice *dev)
+{
+ struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ struct orion_timer_priv *priv = dev_get_priv(dev);
+
+ priv->base = devfdt_remap_addr_index(dev, 0);
+ if (!priv->base) {
+ debug("unable to map registers\n");
+ return -ENOMEM;
+ }
+
+ uc_priv->clock_rate = CONFIG_SYS_TCLK;
+
+ writel(~0, priv->base + TIMER0_VAL);
+ writel(~0, priv->base + TIMER0_RELOAD);
+
+ /* enable timer */
+ setbits_le32(priv->base + TIMER_CTRL, TIMER0_EN | TIMER0_RELOAD_EN);
+
+ return 0;
+}
+
+static const struct timer_ops orion_timer_ops = {
+ .get_count = orion_timer_get_count,
+};
+
+static const struct udevice_id orion_timer_ids[] = {
+ { .compatible = "marvell,orion-timer" },
+ {}
+};
+
+U_BOOT_DRIVER(orion_timer) = {
+ .name = "orion_timer",
+ .id = UCLASS_TIMER,
+ .of_match = orion_timer_ids,
+ .probe = orion_timer_probe,
+ .ops = &orion_timer_ops,
+ .priv_auto = sizeof(struct orion_timer_priv),
+};