65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* GXP timer driver
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*
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* (C) Copyright 2022 Hewlett Packard Enterprise Development LP.
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* Author: Nick Hawkins <nick.hawkins@hpe.com>
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* Author: Jean-Marie Verdun <verdun@hpe.com>
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*/
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#include <clk.h>
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#include <dm.h>
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#include <timer.h>
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#include <asm/io.h>
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#define USTIMELO 0x18
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#define USTIMEHI 0x1C
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struct gxp_timer_priv {
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void __iomem *base;
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};
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static u64 gxp_timer_get_count(struct udevice *dev)
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{
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struct gxp_timer_priv *priv = dev_get_priv(dev);
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u64 val;
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val = readl(priv->base + USTIMEHI);
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val = (val << 32) | readl(priv->base + USTIMELO);
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return val;
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}
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static int gxp_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 gxp_timer_priv *priv = dev_get_priv(dev);
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priv->base = dev_read_addr_ptr(dev);
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if (!priv->base)
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return -ENOENT;
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uc_priv->clock_rate = 1000000;
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return 0;
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}
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static const struct timer_ops gxp_timer_ops = {
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.get_count = gxp_timer_get_count,
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};
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static const struct udevice_id gxp_timer_ids[] = {
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{ .compatible = "hpe,gxp-timer" },
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{}
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};
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U_BOOT_DRIVER(gxp_timer) = {
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.name = "gxp-timer",
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.id = UCLASS_TIMER,
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.of_match = gxp_timer_ids,
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.priv_auto = sizeof(struct gxp_timer_priv),
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.probe = gxp_timer_probe,
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.ops = &gxp_timer_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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