drivers/reset/reset-k210.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
7 #include <linux/reset-controller.h>
9 #include <linux/mfd/syscon.h>
11 #include <soc/canaan/k210-sysctl.h>
13 #include <dt-bindings/reset/k210-rst.h>
33 	return regmap_update_bits(ksr->map, K210_SYSCTL_PERI_RESET, BIT(id), 1);  in k210_rst_assert()
41 	return regmap_update_bits(ksr->map, K210_SYSCTL_PERI_RESET, BIT(id), 0);  in k210_rst_deassert()
65 	ret = regmap_read(ksr->map, K210_SYSCTL_PERI_RESET, &reg);  in k210_rst_status()
75 	unsigned long id = reset_spec->args[0];  in k210_rst_xlate()
78 		return -EINVAL;  in k210_rst_xlate()
92 	struct device *dev = &pdev->dev;  in k210_rst_probe()
100 		return -ENOMEM;  in k210_rst_probe()
102 	parent_np = of_get_parent(dev->of_node);  in k210_rst_probe()
103 	ksr->map = syscon_node_to_regmap(parent_np);  in k210_rst_probe()
105 	if (IS_ERR(ksr->map))  in k210_rst_probe()
106 		return PTR_ERR(ksr->map);  in k210_rst_probe()
108 	ksr->rcdev.owner = THIS_MODULE;  in k210_rst_probe()
109 	ksr->rcdev.dev = dev;  in k210_rst_probe()
110 	ksr->rcdev.of_node = dev->of_node;  in k210_rst_probe()
111 	ksr->rcdev.ops = &k210_rst_ops;  in k210_rst_probe()
112 	ksr->rcdev.nr_resets = fls(K210_RST_MASK);  in k210_rst_probe()
113 	ksr->rcdev.of_reset_n_cells = 1;  in k210_rst_probe()
114 	ksr->rcdev.of_xlate = k210_rst_xlate;  in k210_rst_probe()
116 	return devm_reset_controller_register(dev, &ksr->rcdev);  in k210_rst_probe()
120 	{ .compatible = "canaan,k210-rst" },
127 		.name		= "k210-rst",