1 // SPDX-License-Identifier: GPL-2.0
3 // rcpm.c - Freescale QorIQ RCPM driver
26  * rcpm_pm_prepare - performs device-level tasks associated with power
27  * management, such as programming related to the wakeup source control.
37 	struct device_node	*np = dev->of_node;  in rcpm_pm_prepare()
43 		return -EINVAL;  in rcpm_pm_prepare()
45 	base = rcpm->ippdexpcr_base;  in rcpm_pm_prepare()
48 	/* Begin with first registered wakeup source */  in rcpm_pm_prepare()
52 		if (!ws->dev || !ws->dev->parent)  in rcpm_pm_prepare()
55 		ret = device_property_read_u32_array(ws->dev->parent,  in rcpm_pm_prepare()
56 				"fsl,rcpm-wakeup", value,  in rcpm_pm_prepare()
57 				rcpm->wakeup_cells + 1);  in rcpm_pm_prepare()
59 		/*  Wakeup source should refer to current rcpm device */  in rcpm_pm_prepare()
60 		if (ret || (np->phandle != value[0]))  in rcpm_pm_prepare()
63 		/* Property "#fsl,rcpm-wakeup-cells" of rcpm node defines the  in rcpm_pm_prepare()
64 		 * number of IPPDEXPCR register cells, and "fsl,rcpm-wakeup"  in rcpm_pm_prepare()
65 		 * of wakeup source IP contains an integer array: <phandle to  in rcpm_pm_prepare()
71 		for (i = 0; i < rcpm->wakeup_cells; i++)  in rcpm_pm_prepare()
78 	for (i = 0; i < rcpm->wakeup_cells; i++) {  in rcpm_pm_prepare()
86 		if (rcpm->little_endian) {  in rcpm_pm_prepare()
104 	struct device	*dev = &pdev->dev;  in rcpm_probe()
111 		return -ENOMEM;  in rcpm_probe()
115 		return -ENODEV;  in rcpm_probe()
117 	rcpm->ippdexpcr_base = devm_ioremap_resource(&pdev->dev, r);  in rcpm_probe()
118 	if (IS_ERR(rcpm->ippdexpcr_base)) {  in rcpm_probe()
119 		ret =  PTR_ERR(rcpm->ippdexpcr_base);  in rcpm_probe()
123 	rcpm->little_endian = device_property_read_bool(  in rcpm_probe()
124 			&pdev->dev, "little-endian");  in rcpm_probe()
126 	ret = device_property_read_u32(&pdev->dev,  in rcpm_probe()
127 			"#fsl,rcpm-wakeup-cells", &rcpm->wakeup_cells);  in rcpm_probe()
131 	dev_set_drvdata(&pdev->dev, rcpm);  in rcpm_probe()
137 	{ .compatible = "fsl,qoriq-rcpm-2.1+", },