1 // SPDX-License-Identifier: GPL-2.0
3 // rcpm.c - Freescale QorIQ RCPM driver
5 // Copyright 2019-2020 NXP
34 	np = of_find_compatible_node(NULL, NULL, "fsl,ls1021a-scfg");  in copy_ippdexpcr1_setting()
49  * rcpm_pm_prepare - performs device-level tasks associated with power
50  * management, such as programming related to the wakeup source control.
60 	struct device_node	*np = dev->of_node;  in rcpm_pm_prepare()
66 		return -EINVAL;  in rcpm_pm_prepare()
68 	base = rcpm->ippdexpcr_base;  in rcpm_pm_prepare()
71 	/* Begin with first registered wakeup source */  in rcpm_pm_prepare()
75 		if (!ws->dev || !ws->dev->parent)  in rcpm_pm_prepare()
78 		ret = device_property_read_u32_array(ws->dev->parent,  in rcpm_pm_prepare()
79 				"fsl,rcpm-wakeup", value,  in rcpm_pm_prepare()
80 				rcpm->wakeup_cells + 1);  in rcpm_pm_prepare()
86 		 * For DT mode, would handle devices with "fsl,rcpm-wakeup"  in rcpm_pm_prepare()
92 		if (is_of_node(dev->fwnode))  in rcpm_pm_prepare()
93 			if (np->phandle != value[0])  in rcpm_pm_prepare()
96 		/* Property "#fsl,rcpm-wakeup-cells" of rcpm node defines the  in rcpm_pm_prepare()
97 		 * number of IPPDEXPCR register cells, and "fsl,rcpm-wakeup"  in rcpm_pm_prepare()
98 		 * of wakeup source IP contains an integer array: <phandle to  in rcpm_pm_prepare()
104 		for (i = 0; i < rcpm->wakeup_cells; i++)  in rcpm_pm_prepare()
111 	for (i = 0; i < rcpm->wakeup_cells; i++) {  in rcpm_pm_prepare()
119 		if (rcpm->little_endian) {  in rcpm_pm_prepare()
127 		 * Workaround of errata A-008646 on SoC LS1021A:  in rcpm_pm_prepare()
135 			if (of_device_is_compatible(np, "fsl,ls1021a-rcpm"))  in rcpm_pm_prepare()
148 	struct device	*dev = &pdev->dev;  in rcpm_probe()
154 		return -ENOMEM;  in rcpm_probe()
156 	rcpm->ippdexpcr_base = devm_platform_ioremap_resource(pdev, 0);  in rcpm_probe()
157 	if (IS_ERR(rcpm->ippdexpcr_base)) {  in rcpm_probe()
158 		ret =  PTR_ERR(rcpm->ippdexpcr_base);  in rcpm_probe()
162 	rcpm->little_endian = device_property_read_bool(  in rcpm_probe()
163 			&pdev->dev, "little-endian");  in rcpm_probe()
165 	ret = device_property_read_u32(&pdev->dev,  in rcpm_probe()
166 			"#fsl,rcpm-wakeup-cells", &rcpm->wakeup_cells);  in rcpm_probe()
170 	dev_set_drvdata(&pdev->dev, rcpm);  in rcpm_probe()
176 	{ .compatible = "fsl,qoriq-rcpm-2.1+", },