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