1 // SPDX-License-Identifier: GPL-2.0+
2 /* Microchip Sparx5 Switch Reset driver
6  * The Sparx5 Chip Register Model can be browsed at this location:
7  * https://github.com/microchip-ung/sparx-5_reginfo
16 #include <linux/reset-controller.h>
43 	regmap_update_bits(ctx->cpu_ctrl, ctx->props->protect_reg,  in sparx5_switch_reset()
44 			   ctx->props->protect_bit, ctx->props->protect_bit);  in sparx5_switch_reset()
47 	regmap_write(ctx->gcb_ctrl, ctx->props->reset_reg,  in sparx5_switch_reset()
48 		     ctx->props->reset_bit);  in sparx5_switch_reset()
51 	return regmap_read_poll_timeout(ctx->gcb_ctrl, ctx->props->reset_reg, val,  in sparx5_switch_reset()
52 					(val & ctx->props->reset_bit) == 0,  in sparx5_switch_reset()
89 		return ERR_PTR(-ENOMEM);  in mchp_lan966x_syscon_to_regmap()
91 	regmap_config.max_register =  resource_size(&res) - 4;  in mchp_lan966x_syscon_to_regmap()
103 	syscon_np = of_parse_phandle(pdev->dev.of_node, name, 0);  in mchp_sparx5_map_syscon()
105 		return -ENODEV;  in mchp_sparx5_map_syscon()
109 	 * When used in LAN966x PCI device, the cpu-syscon device needs to be  in mchp_sparx5_map_syscon()
114 	if (of_device_is_compatible(pdev->dev.of_node, "microchip,lan966x-switch-reset"))  in mchp_sparx5_map_syscon()
115 		regmap = mchp_lan966x_syscon_to_regmap(&pdev->dev, syscon_np);  in mchp_sparx5_map_syscon()
121 		dev_err(&pdev->dev, "No '%s' map: %d\n", name, err);  in mchp_sparx5_map_syscon()
137 		dev_err(&pdev->dev, "Could not map resource %d\n", index);  in mchp_sparx5_map_io()
140 	sparx5_reset_regmap_config.name = res->name;  in mchp_sparx5_map_io()
141 	map = devm_regmap_init_mmio(&pdev->dev, mem, &sparx5_reset_regmap_config);  in mchp_sparx5_map_io()
150 	struct device_node *dn = pdev->dev.of_node;  in mchp_sparx5_reset_probe()
154 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);  in mchp_sparx5_reset_probe()
156 		return -ENOMEM;  in mchp_sparx5_reset_probe()
158 	err = mchp_sparx5_map_syscon(pdev, "cpu-syscon", &ctx->cpu_ctrl);  in mchp_sparx5_reset_probe()
161 	err = mchp_sparx5_map_io(pdev, 0, &ctx->gcb_ctrl);  in mchp_sparx5_reset_probe()
165 	ctx->rcdev.owner = THIS_MODULE;  in mchp_sparx5_reset_probe()
166 	ctx->rcdev.dev = &pdev->dev;  in mchp_sparx5_reset_probe()
167 	ctx->rcdev.nr_resets = 1;  in mchp_sparx5_reset_probe()
168 	ctx->rcdev.ops = &sparx5_reset_ops;  in mchp_sparx5_reset_probe()
169 	ctx->rcdev.of_node = dn;  in mchp_sparx5_reset_probe()
170 	ctx->props = device_get_match_data(&pdev->dev);  in mchp_sparx5_reset_probe()
177 	return devm_reset_controller_register(&pdev->dev, &ctx->rcdev);  in mchp_sparx5_reset_probe()
196 		.compatible = "microchip,sparx5-switch-reset",
199 		.compatible = "microchip,lan966x-switch-reset",
209 		.name = "sparx5-switch-reset",
225 MODULE_DESCRIPTION("Microchip Sparx5 switch reset driver");