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-rw-r--r--drivers/timer/Kconfig7
-rw-r--r--drivers/timer/Makefile1
-rw-r--r--drivers/timer/rockchip_timer.c107
3 files changed, 115 insertions, 0 deletions
diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
index ac4832be20..13f122350b 100644
--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -103,4 +103,11 @@ config AE3XX_TIMER
help
Select this to enable a timer for AE3XX devices.
+config ROCKCHIP_TIMER
+ bool "Rockchip timer support"
+ depends on TIMER
+ help
+ Select this to enable support for the timer found on
+ Rockchip devices.
+
endmenu
diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile
index d16ea5391e..fa7ce7c835 100644
--- a/drivers/timer/Makefile
+++ b/drivers/timer/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_STI_TIMER) += sti-timer.o
obj-$(CONFIG_ARC_TIMER) += arc_timer.o
obj-$(CONFIG_AG101P_TIMER) += ag101p_timer.o
obj-$(CONFIG_AE3XX_TIMER) += ae3xx_timer.o
+obj-$(CONFIG_ROCKCHIP_TIMER) += rockchip_timer.o
diff --git a/drivers/timer/rockchip_timer.c b/drivers/timer/rockchip_timer.c
new file mode 100644
index 0000000000..0848033c66
--- /dev/null
+++ b/drivers/timer/rockchip_timer.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2017 Theobroma Systems Design und Consulting GmbH
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <mapmem.h>
+#include <asm/arch/timer.h>
+#include <dt-structs.h>
+#include <timer.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+struct rockchip_timer_plat {
+ struct dtd_rockchip_rk3368_timer dtd;
+};
+#endif
+
+/* Driver private data. Contains timer id. Could be either 0 or 1. */
+struct rockchip_timer_priv {
+ struct rk_timer *timer;
+};
+
+static int rockchip_timer_get_count(struct udevice *dev, u64 *count)
+{
+ struct rockchip_timer_priv *priv = dev_get_priv(dev);
+ uint64_t timebase_h, timebase_l;
+ uint64_t cntr;
+
+ timebase_l = readl(&priv->timer->timer_curr_value0);
+ timebase_h = readl(&priv->timer->timer_curr_value1);
+
+ /* timers are down-counting */
+ cntr = timebase_h << 32 | timebase_l;
+ *count = ~0ull - cntr;
+ return 0;
+}
+
+static int rockchip_clk_ofdata_to_platdata(struct udevice *dev)
+{
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+ struct rockchip_timer_priv *priv = dev_get_priv(dev);
+
+ priv->timer = (struct rk_timer *)devfdt_get_addr(dev);
+#endif
+
+ return 0;
+}
+
+static int rockchip_timer_start(struct udevice *dev)
+{
+ struct rockchip_timer_priv *priv = dev_get_priv(dev);
+ const uint64_t reload_val = ~0uLL;
+ const uint32_t reload_val_l = reload_val & 0xffffffff;
+ const uint32_t reload_val_h = reload_val >> 32;
+
+ /* disable timer and reset all control */
+ writel(0, &priv->timer->timer_ctrl_reg);
+ /* write reload value */
+ writel(reload_val_l, &priv->timer->timer_load_count0);
+ writel(reload_val_h, &priv->timer->timer_load_count1);
+ /* enable timer */
+ writel(1, &priv->timer->timer_ctrl_reg);
+
+ return 0;
+}
+
+static int rockchip_timer_probe(struct udevice *dev)
+{
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ struct rockchip_timer_priv *priv = dev_get_priv(dev);
+ struct rockchip_timer_plat *plat = dev_get_platdata(dev);
+
+ priv->timer = map_sysmem(plat->dtd.reg[1], plat->dtd.reg[3]);
+ uc_priv->clock_rate = plat->dtd.clock_frequency;
+#endif
+
+ return rockchip_timer_start(dev);
+}
+
+static const struct timer_ops rockchip_timer_ops = {
+ .get_count = rockchip_timer_get_count,
+};
+
+static const struct udevice_id rockchip_timer_ids[] = {
+ { .compatible = "rockchip,rk3368-timer" },
+ {}
+};
+
+U_BOOT_DRIVER(arc_timer) = {
+ .name = "rockchip_rk3368_timer",
+ .id = UCLASS_TIMER,
+ .of_match = rockchip_timer_ids,
+ .probe = rockchip_timer_probe,
+ .ops = &rockchip_timer_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+ .priv_auto_alloc_size = sizeof(struct rockchip_timer_priv),
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ .platdata_auto_alloc_size = sizeof(struct rockchip_timer_plat),
+#endif
+ .ofdata_to_platdata = rockchip_clk_ofdata_to_platdata,
+};