1 // SPDX-License-Identifier: GPL-2.0-only
3  * Pistachio SoC Reset Controller driver
14 #include <linux/reset-controller.h>
18 #include <dt-bindings/reset/pistachio-resets.h>
59 		return -EINVAL;  in pistachio_reset_shift()
67 	u32 mask;  in pistachio_reset_assert()  local
74 	mask = BIT(shift);  in pistachio_reset_assert()
76 	return regmap_update_bits(rd->periph_regs, PISTACHIO_SOFT_RESET,  in pistachio_reset_assert()
77 				  mask, mask);  in pistachio_reset_assert()
84 	u32 mask;  in pistachio_reset_deassert()  local
91 	mask = BIT(shift);  in pistachio_reset_deassert()
93 	return regmap_update_bits(rd->periph_regs, PISTACHIO_SOFT_RESET,  in pistachio_reset_deassert()
94 				  mask, 0);  in pistachio_reset_deassert()
105 	struct device *dev = &pdev->dev;  in pistachio_reset_probe()
106 	struct device_node *np = pdev->dev.of_node;  in pistachio_reset_probe()
110 		return -ENOMEM;  in pistachio_reset_probe()
112 	rd->periph_regs = syscon_node_to_regmap(np->parent);  in pistachio_reset_probe()
113 	if (IS_ERR(rd->periph_regs))  in pistachio_reset_probe()
114 		return PTR_ERR(rd->periph_regs);  in pistachio_reset_probe()
116 	rd->rcdev.owner = THIS_MODULE;  in pistachio_reset_probe()
117 	rd->rcdev.nr_resets = PISTACHIO_RESET_MAX + 1;  in pistachio_reset_probe()
118 	rd->rcdev.ops = &pistachio_reset_ops;  in pistachio_reset_probe()
119 	rd->rcdev.of_node = np;  in pistachio_reset_probe()
121 	return devm_reset_controller_register(dev, &rd->rcdev);  in pistachio_reset_probe()
125 	 { .compatible = "img,pistachio-reset", },
132 		.name		= "pistachio-reset",