3  * FPGA Region - Device Tree support for FPGA programming under Linux
8 #include <linux/fpga/fpga-bridge.h>
9 #include <linux/fpga/fpga-mgr.h>
10 #include <linux/fpga/fpga-region.h>
22 	{ .compatible = "fpga-region", },
28  * of_fpga_region_find - find FPGA region
29  * @np: device node of FPGA Region
33  * Return: FPGA Region struct or NULL
41  * of_fpga_region_get_mgr - get reference for FPGA manager
42  * @np: device node of FPGA region
44  * Get FPGA Manager from "fpga-mgr" property or from ancestor region.
48  * Return: fpga manager struct or IS_ERR() condition containing error code.
57 		if (of_device_is_compatible(np, "fpga-region")) {  in of_fpga_region_get_mgr()
58 			mgr_node = of_parse_phandle(np, "fpga-mgr", 0);  in of_fpga_region_get_mgr()
75  * @region: FPGA region
78  * specified by "fpga-bridges" property.  Note that the
109 	br = of_parse_phandle(info->overlay, "fpga-bridges", 0);  in of_fpga_region_get_bridges()
118 		br = of_parse_phandle(np, "fpga-bridges", i);  in of_fpga_region_get_bridges()
147  * If the overlay adds child FPGA regions, they are not allowed to have
150  * Return: 0 for OK or -EINVAL if child FPGA region adds firmware-name.
174 		pr_err("firmware-name not allowed in child FPGA region: %pOF",  in child_regions_with_firmware()
183  * @region: FPGA region
184  * @overlay: overlay applied to the FPGA region
186  * Given an overlay applied to an FPGA region, parse the FPGA image specific
190  *   NULL if overlay doesn't direct us to program the FPGA.
209 	 * Reject overlay if child FPGA Regions added in the overlay have  in of_fpga_region_parse_ov()
210 	 * firmware-name property (would mean that an FPGA region that has  in of_fpga_region_parse_ov()
211 	 * not been added to the live tree yet is doing FPGA programming).  in of_fpga_region_parse_ov()
223 	/* Read FPGA region properties from the overlay */  in of_fpga_region_parse_ov()
224 	if (of_property_read_bool(overlay, "partial-fpga-config"))  in of_fpga_region_parse_ov()
227 	if (of_property_read_bool(overlay, "external-fpga-config"))  in of_fpga_region_parse_ov()
230 	if (of_property_read_bool(overlay, "encrypted-fpga-config"))  in of_fpga_region_parse_ov()
250 	/* If overlay is not programming the FPGA, don't need FPGA image info */  in of_fpga_region_parse_ov()
257 	 * If overlay informs us FPGA was externally programmed, specifying  in of_fpga_region_parse_ov()
261 		dev_err(dev, "error: specified firmware and external-fpga-config");  in of_fpga_region_parse_ov()
275  * @region: FPGA region that the overlay was applied to
278  * Called when an overlay targeted to an FPGA Region is about to be applied.
279  * Parses the overlay for properties that influence how the FPGA will be
280  * programmed and does some checking. If the checks pass, programs the FPGA.
297 	/* If overlay doesn't program the FPGA, accept it anyway. */  in of_fpga_region_notify_pre_apply()
320  * @region: FPGA region that was targeted by the overlay that was removed
324  * FPGA region.
341  * This notifier handles programming an FPGA when a "firmware-name" property is
342  * added to an fpga-region.
344  * Return: NOTIFY_OK or error if FPGA programming fails.
405 	/* Find the FPGA mgr specified by region or parent region. */  in of_fpga_region_probe()
419 	dev_info(dev, "FPGA Region probed\n");  in of_fpga_region_probe()
441 		.name	= "of-fpga-region",
480 MODULE_DESCRIPTION("FPGA Region");