power/reset/ocelot-reset.c

1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
11 #include <linux/mfd/syscon.h>
15 #include <linux/reboot.h>
19 	const char *syscon;  member
41 				 unsigned long mode, void *cmd)  in ocelot_restart_handle()  argument
46 	u32 if_si_owner_bit = ctx->props->if_si_owner_bit;  in ocelot_restart_handle()
49 	regmap_update_bits(ctx->cpu_ctrl, ctx->props->protect_reg,  in ocelot_restart_handle()
50 			   ctx->props->vcore_protect, 0);  in ocelot_restart_handle()
52 	/* Make the SI back to boot mode */  in ocelot_restart_handle()
53 	regmap_update_bits(ctx->cpu_ctrl, ICPU_CFG_CPU_SYSTEM_CTRL_GENERAL_CTRL,  in ocelot_restart_handle()
59 	writel(SOFT_CHIP_RST, ctx->base);  in ocelot_restart_handle()
70 	struct device *dev = &pdev->dev;  in ocelot_reset_probe()
73 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);  in ocelot_reset_probe()
75 		return -ENOMEM;  in ocelot_reset_probe()
78 	ctx->base = devm_ioremap_resource(dev, res);  in ocelot_reset_probe()
79 	if (IS_ERR(ctx->base))  in ocelot_reset_probe()
80 		return PTR_ERR(ctx->base);  in ocelot_reset_probe()
82 	ctx->props = device_get_match_data(dev);  in ocelot_reset_probe()
84 	ctx->cpu_ctrl = syscon_regmap_lookup_by_compatible(ctx->props->syscon);  in ocelot_reset_probe()
85 	if (IS_ERR(ctx->cpu_ctrl)) {  in ocelot_reset_probe()
86 		dev_err(dev, "No syscon map: %s\n", ctx->props->syscon);  in ocelot_reset_probe()
87 		return PTR_ERR(ctx->cpu_ctrl);  in ocelot_reset_probe()
90 	ctx->restart_handler.notifier_call = ocelot_restart_handle;  in ocelot_reset_probe()
91 	ctx->restart_handler.priority = 192;  in ocelot_reset_probe()
92 	err = register_restart_handler(&ctx->restart_handler);  in ocelot_reset_probe()
100 	.syscon		 = "mscc,ocelot-cpu-syscon",
107 	.syscon		 = "microchip,sparx5-cpu-syscon",
115 		.compatible = "mscc,ocelot-chip-reset",
118 		.compatible = "microchip,sparx5-chip-reset",
127 		.name = "ocelot-chip-reset",