1 // SPDX-License-Identifier: GPL-2.0
4  * Copyright (C) 2017 Spreadtrum  - http://www.spreadtrum.com
10 #include <linux/hwspinlock.h>
20 /* hwspinlock registers definition */
30 /* hwspinlock number */
40 static int sprd_hwspinlock_trylock(struct hwspinlock *lock)  in sprd_hwspinlock_trylock()
43 		dev_get_drvdata(lock->bank->dev);  in sprd_hwspinlock_trylock()
44 	void __iomem *addr = lock->priv;  in sprd_hwspinlock_trylock()
52 	user_id = readl(sprd_hwlock->base + HWSPINLOCK_MASTERID(lock_id));  in sprd_hwspinlock_trylock()
53 	dev_warn(sprd_hwlock->bank.dev,  in sprd_hwspinlock_trylock()
54 		 "hwspinlock [%d] lock failed and master/user id = %d!\n",  in sprd_hwspinlock_trylock()
60 static void sprd_hwspinlock_unlock(struct hwspinlock *lock)  in sprd_hwspinlock_unlock()
62 	void __iomem *lock_addr = lock->priv;  in sprd_hwspinlock_unlock()
68 static void sprd_hwspinlock_relax(struct hwspinlock *lock)  in sprd_hwspinlock_relax()
83 	clk_disable_unprepare(sprd_hwlock->clk);  in sprd_hwspinlock_disable()
89 	struct hwspinlock *lock;  in sprd_hwspinlock_probe()
92 	if (!pdev->dev.of_node)  in sprd_hwspinlock_probe()
93 		return -ENODEV;  in sprd_hwspinlock_probe()
95 	sprd_hwlock = devm_kzalloc(&pdev->dev,  in sprd_hwspinlock_probe()
99 		return -ENOMEM;  in sprd_hwspinlock_probe()
101 	sprd_hwlock->base = devm_platform_ioremap_resource(pdev, 0);  in sprd_hwspinlock_probe()
102 	if (IS_ERR(sprd_hwlock->base))  in sprd_hwspinlock_probe()
103 		return PTR_ERR(sprd_hwlock->base);  in sprd_hwspinlock_probe()
105 	sprd_hwlock->clk = devm_clk_get(&pdev->dev, "enable");  in sprd_hwspinlock_probe()
106 	if (IS_ERR(sprd_hwlock->clk)) {  in sprd_hwspinlock_probe()
107 		dev_err(&pdev->dev, "get hwspinlock clock failed!\n");  in sprd_hwspinlock_probe()
108 		return PTR_ERR(sprd_hwlock->clk);  in sprd_hwspinlock_probe()
111 	ret = clk_prepare_enable(sprd_hwlock->clk);  in sprd_hwspinlock_probe()
115 	ret = devm_add_action_or_reset(&pdev->dev, sprd_hwspinlock_disable,  in sprd_hwspinlock_probe()
118 		dev_err(&pdev->dev,  in sprd_hwspinlock_probe()
119 			"Failed to add hwspinlock disable action\n");  in sprd_hwspinlock_probe()
123 	/* set the hwspinlock to record user id to identify subsystems */  in sprd_hwspinlock_probe()
124 	writel(HWSPINLOCK_USER_BITS, sprd_hwlock->base + HWSPINLOCK_RECCTRL);  in sprd_hwspinlock_probe()
127 		lock = &sprd_hwlock->bank.lock[i];  in sprd_hwspinlock_probe()
128 		lock->priv = sprd_hwlock->base + HWSPINLOCK_TOKEN(i);  in sprd_hwspinlock_probe()
133 	return devm_hwspin_lock_register(&pdev->dev, &sprd_hwlock->bank,  in sprd_hwspinlock_probe()
139 	{ .compatible = "sprd,hwspinlock-r3p0", },