1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Copyright (c) 2015-2016 HiSilicon Technologies Co., Ltd.
11 #include <linux/reset-controller.h>
21 	spinlock_t	lock;  member
33 	u32 offset;  in hisi_reset_of_xlate()  local
36 	offset = (reset_spec->args[0] << HISI_RESET_OFFSET_SHIFT)  in hisi_reset_of_xlate()
38 	bit = reset_spec->args[1] & HISI_RESET_BIT_MASK;  in hisi_reset_of_xlate()
40 	return (offset | bit);  in hisi_reset_of_xlate()
48 	u32 offset, reg;  in hisi_reset_assert()  local
51 	offset = (id & HISI_RESET_OFFSET_MASK) >> HISI_RESET_OFFSET_SHIFT;  in hisi_reset_assert()
54 	spin_lock_irqsave(&rstc->lock, flags);  in hisi_reset_assert()
56 	reg = readl(rstc->membase + offset);  in hisi_reset_assert()
57 	writel(reg | BIT(bit), rstc->membase + offset);  in hisi_reset_assert()
59 	spin_unlock_irqrestore(&rstc->lock, flags);  in hisi_reset_assert()
69 	u32 offset, reg;  in hisi_reset_deassert()  local
72 	offset = (id & HISI_RESET_OFFSET_MASK) >> HISI_RESET_OFFSET_SHIFT;  in hisi_reset_deassert()
75 	spin_lock_irqsave(&rstc->lock, flags);  in hisi_reset_deassert()
77 	reg = readl(rstc->membase + offset);  in hisi_reset_deassert()
78 	writel(reg & ~BIT(bit), rstc->membase + offset);  in hisi_reset_deassert()
80 	spin_unlock_irqrestore(&rstc->lock, flags);  in hisi_reset_deassert()
94 	rstc = devm_kmalloc(&pdev->dev, sizeof(*rstc), GFP_KERNEL);  in hisi_reset_init()
98 	rstc->membase = devm_platform_ioremap_resource(pdev, 0);  in hisi_reset_init()
99 	if (IS_ERR(rstc->membase))  in hisi_reset_init()
102 	spin_lock_init(&rstc->lock);  in hisi_reset_init()
103 	rstc->rcdev.owner = THIS_MODULE;  in hisi_reset_init()
104 	rstc->rcdev.ops = &hisi_reset_ops;  in hisi_reset_init()
105 	rstc->rcdev.of_node = pdev->dev.of_node;  in hisi_reset_init()
106 	rstc->rcdev.of_reset_n_cells = 2;  in hisi_reset_init()
107 	rstc->rcdev.of_xlate = hisi_reset_of_xlate;  in hisi_reset_init()
108 	reset_controller_register(&rstc->rcdev);  in hisi_reset_init()
116 	reset_controller_unregister(&rstc->rcdev);  in hisi_reset_exit()