1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2023 Inochi Amaoto <inochiama@outlook.com>
4 */
5
6#include <linux/io.h>
7#include <linux/iopoll.h>
8#include <linux/spinlock.h>
9#include <linux/bug.h>
10
11#include "clk-cv18xx-common.h"
12
13int cv1800_clk_setbit(struct cv1800_clk_common *common,
14		      struct cv1800_clk_regbit *field)
15{
16	u32 mask = BIT(field->shift);
17	u32 value;
18	unsigned long flags;
19
20	spin_lock_irqsave(common->lock, flags);
21
22	value = readl(common->base + field->reg);
23	writel(value | mask, common->base + field->reg);
24
25	spin_unlock_irqrestore(common->lock, flags);
26
27	return 0;
28}
29
30int cv1800_clk_clearbit(struct cv1800_clk_common *common,
31			struct cv1800_clk_regbit *field)
32{
33	u32 mask = BIT(field->shift);
34	u32 value;
35	unsigned long flags;
36
37	spin_lock_irqsave(common->lock, flags);
38
39	value = readl(common->base + field->reg);
40	writel(value & ~mask, common->base + field->reg);
41
42	spin_unlock_irqrestore(common->lock, flags);
43
44	return 0;
45}
46
47int cv1800_clk_checkbit(struct cv1800_clk_common *common,
48			struct cv1800_clk_regbit *field)
49{
50	return readl(common->base + field->reg) & BIT(field->shift);
51}
52
53#define PLL_LOCK_TIMEOUT_US	(200 * 1000)
54
55void cv1800_clk_wait_for_lock(struct cv1800_clk_common *common,
56			      u32 reg, u32 lock)
57{
58	void __iomem *addr = common->base + reg;
59	u32 regval;
60
61	if (!lock)
62		return;
63
64	WARN_ON(readl_relaxed_poll_timeout(addr, regval, regval & lock,
65					   100, PLL_LOCK_TIMEOUT_US));
66}
67