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1// SPDX-License-Identifier: GPL-2.02/*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