mirror of
https://github.com/AsahiLinux/u-boot
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e9e73d78a8
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>
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <asm/io.h>
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#include <common.h>
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#include <dm/device.h>
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#include <dm/fdtaddr.h>
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#include <timer.h>
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#define TIMER_CTRL 0x00
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#define TIMER0_EN BIT(0)
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#define TIMER0_RELOAD_EN BIT(1)
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#define TIMER0_RELOAD 0x10
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#define TIMER0_VAL 0x14
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struct orion_timer_priv {
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void *base;
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};
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static uint64_t orion_timer_get_count(struct udevice *dev)
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{
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struct orion_timer_priv *priv = dev_get_priv(dev);
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return ~readl(priv->base + TIMER0_VAL);
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}
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static int orion_timer_probe(struct udevice *dev)
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{
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struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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struct orion_timer_priv *priv = dev_get_priv(dev);
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priv->base = devfdt_remap_addr_index(dev, 0);
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if (!priv->base) {
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debug("unable to map registers\n");
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return -ENOMEM;
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}
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uc_priv->clock_rate = CONFIG_SYS_TCLK;
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writel(~0, priv->base + TIMER0_VAL);
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writel(~0, priv->base + TIMER0_RELOAD);
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/* enable timer */
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setbits_le32(priv->base + TIMER_CTRL, TIMER0_EN | TIMER0_RELOAD_EN);
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return 0;
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}
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static const struct timer_ops orion_timer_ops = {
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.get_count = orion_timer_get_count,
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};
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static const struct udevice_id orion_timer_ids[] = {
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{ .compatible = "marvell,orion-timer" },
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{}
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};
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U_BOOT_DRIVER(orion_timer) = {
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.name = "orion_timer",
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.id = UCLASS_TIMER,
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.of_match = orion_timer_ids,
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.probe = orion_timer_probe,
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.ops = &orion_timer_ops,
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.priv_auto = sizeof(struct orion_timer_priv),
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};
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