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timer: add orion-timer support

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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>
This commit is contained in:
Michael Walle 2022-08-17 21:37:51 +02:00 committed by Stefan Roese
parent 78c9b85df8
commit e9e73d78a8
3 changed files with 70 additions and 0 deletions
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6
drivers/timer/Kconfig
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@ -194,6 +194,12 @@ config OMAP_TIMER
help
Select this to enable an timer for Omap devices.
config ORION_TIMER
bool "Orion timer support"
depends on TIMER
help
Select this to enable an timer for Orion devices.
config RISCV_TIMER
bool "RISC-V timer support"
depends on TIMER && RISCV

1
drivers/timer/Makefile
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@ -17,6 +17,7 @@ obj-$(CONFIG_MPC83XX_TIMER) += mpc83xx_timer.o
obj-$(CONFIG_NOMADIK_MTU_TIMER) += nomadik-mtu-timer.o
obj-$(CONFIG_NPCM_TIMER) += npcm-timer.o
obj-$(CONFIG_OMAP_TIMER) += omap-timer.o
obj-$(CONFIG_ORION_TIMER) += orion-timer.o
obj-$(CONFIG_RENESAS_OSTM_TIMER) += ostm_timer.o
obj-$(CONFIG_RISCV_TIMER) += riscv_timer.o
obj-$(CONFIG_ROCKCHIP_TIMER) += rockchip_timer.o

63
drivers/timer/orion-timer.c Normal file
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@ -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),
};