]>
git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/timer/sti-timer.c
2 * (C) Copyright 2017 Patrice Chotard <patrice.chotard@st.com>
4 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/arch-armv7/globaltimer.h>
15 DECLARE_GLOBAL_DATA_PTR
;
17 struct sti_timer_priv
{
18 struct globaltimer
*global_timer
;
21 static int sti_timer_get_count(struct udevice
*dev
, u64
*count
)
23 struct sti_timer_priv
*priv
= dev_get_priv(dev
);
24 struct globaltimer
*global_timer
= priv
->global_timer
;
27 u32 old
= readl(&global_timer
->cnt_h
);
30 low
= readl(&global_timer
->cnt_l
);
31 high
= readl(&global_timer
->cnt_h
);
38 *count
= (u64
)((timer
<< 32) | low
);
43 static int sti_timer_probe(struct udevice
*dev
)
45 struct timer_dev_priv
*uc_priv
= dev_get_uclass_priv(dev
);
46 struct sti_timer_priv
*priv
= dev_get_priv(dev
);
49 uc_priv
->clock_rate
= CONFIG_SYS_HZ_CLOCK
;
51 /* get arm global timer base address */
52 addr
= fdtdec_get_addr(gd
->fdt_blob
, dev_of_offset(dev
), "reg");
53 priv
->global_timer
= (struct globaltimer
*)addr
;
56 writel(0x01, &priv
->global_timer
->ctl
);
61 static const struct timer_ops sti_timer_ops
= {
62 .get_count
= sti_timer_get_count
,
65 static const struct udevice_id sti_timer_ids
[] = {
66 { .compatible
= "arm,cortex-a9-global-timer" },
70 U_BOOT_DRIVER(sti_timer
) = {
73 .of_match
= sti_timer_ids
,
74 .priv_auto_alloc_size
= sizeof(struct sti_timer_priv
),
75 .probe
= sti_timer_probe
,
76 .ops
= &sti_timer_ops
,
77 .flags
= DM_FLAG_PRE_RELOC
,