power/reset/keystone-reset.c

1 // SPDX-License-Identifier: GPL-2.0-only
43  * rsctrl_enable_rspll_write - enable access to RSCTRL, RSCFG
56 	/* enable write access to RSTCTRL */  in rsctrl_restart_handler()
59 	/* reset the SOC */  in rsctrl_restart_handler()
72 	{.compatible = "ti,keystone-reset", },
85 	struct device *dev = &pdev->dev;  in rsctrl_probe()
86 	struct device_node *np = dev->of_node;  in rsctrl_probe()
89 		return -ENODEV;  in rsctrl_probe()
92 	pllctrl_regs = syscon_regmap_lookup_by_phandle(np, "ti,syscon-pll");  in rsctrl_probe()
96 	devctrl_regs = syscon_regmap_lookup_by_phandle(np, "ti,syscon-dev");  in rsctrl_probe()
100 	ret = of_property_read_u32_index(np, "ti,syscon-pll", 1, &rspll_offset);  in rsctrl_probe()
102 		dev_err(dev, "couldn't read the reset pll offset!\n");  in rsctrl_probe()
103 		return -EINVAL;  in rsctrl_probe()
106 	ret = of_property_read_u32_index(np, "ti,syscon-dev", 1, &rsmux_offset);  in rsctrl_probe()
109 		return -EINVAL;  in rsctrl_probe()
112 	/* set soft/hard reset */  in rsctrl_probe()
113 	val = of_property_read_bool(np, "ti,soft-reset");  in rsctrl_probe()
124 	/* disable a reset isolation for all module clocks */  in rsctrl_probe()
129 	/* enable a reset for watchdogs from wdt-list */  in rsctrl_probe()
131 		ret = of_property_read_u32_index(np, "ti,wdt-list", i, &val);  in rsctrl_probe()
132 		if (ret == -EOVERFLOW && !i) {  in rsctrl_probe()
133 			dev_err(dev, "ti,wdt-list property has to contain at"  in rsctrl_probe()
135 			return -EINVAL;  in rsctrl_probe()
141 			dev_err(dev, "ti,wdt-list property can contain "  in rsctrl_probe()
143 			return -EINVAL;  in rsctrl_probe()
172 MODULE_DESCRIPTION("Texas Instruments keystone reset driver");