1 // SPDX-License-Identifier: GPL-2.0
3  * Driver for Xilinx TMR Manager IP.
8  * This driver is developed for TMR Manager,The Triple Modular Redundancy(TMR)
9  * Manager is responsible for handling the TMR subsystem state, including
11  * the sub-blocks in the TMR subsystem, and provides majority voting of
21 /* TMR Manager Register offsets */
44  * struct xtmr_manager_dev - Driver data for TMR Manager
63 	iowrite32(value, xtmr_manager->regs + addr);  in xtmr_manager_write()
69 	return ioread32(xtmr_manager->regs + addr);  in xtmr_manager_read()
80 	xtmr_manager->err_cnt++;  in xmb_manager_update_errcnt()
88 	return sysfs_emit(buf, "%x\n", xtmr_manager->err_cnt);  in errcnt_show()
105 	xtmr_manager->cr_val &= ~(1 << XTMR_MANAGER_CR_BB_SHIFT);  in dis_block_break_store()
107 			   xtmr_manager->cr_val);  in dis_block_break_store()
125 	xtmr_manager->cr_val = (1 << XTMR_MANAGER_CR_RIR_SHIFT) |  in xtmr_manager_init()
126 				xtmr_manager->magic1;  in xtmr_manager_init()
128 			   xtmr_manager->cr_val);  in xtmr_manager_init()
137 	 * in the tmr manager, update the xtmr_manager cr_val for the same  in xtmr_manager_init()
139 	xtmr_manager->cr_val |= (1 << XTMR_MANAGER_CR_BB_SHIFT);  in xtmr_manager_init()
144 	 * break handler, Below api updates the TMR manager address and  in xtmr_manager_init()
149 	xmb_manager_register(xtmr_manager->phys_baseaddr, xtmr_manager->cr_val,  in xtmr_manager_init()
155  * xtmr_manager_probe - Driver probe function
169 	xtmr_manager = devm_kzalloc(&pdev->dev, sizeof(*xtmr_manager),  in xtmr_manager_probe()
172 		return -ENOMEM;  in xtmr_manager_probe()
174 	xtmr_manager->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in xtmr_manager_probe()
175 	if (IS_ERR(xtmr_manager->regs))  in xtmr_manager_probe()
176 		return PTR_ERR(xtmr_manager->regs);  in xtmr_manager_probe()
178 	xtmr_manager->phys_baseaddr = res->start;  in xtmr_manager_probe()
180 	err = of_property_read_u32(pdev->dev.of_node, "xlnx,magic1",  in xtmr_manager_probe()
181 				   &xtmr_manager->magic1);  in xtmr_manager_probe()
183 		dev_err(&pdev->dev, "unable to read xlnx,magic1 property");  in xtmr_manager_probe()
187 	if (xtmr_manager->magic1 > XTMR_MANAGER_MAGIC1_MAX_VAL) {  in xtmr_manager_probe()
188 		dev_err(&pdev->dev, "invalid xlnx,magic1 property value");  in xtmr_manager_probe()
189 		return -EINVAL;  in xtmr_manager_probe()
192 	/* Initialize TMR Manager */  in xtmr_manager_probe()
202 		.compatible = "xlnx,tmr-manager-1.0",
210 		.name = "xilinx-tmr_manager",
219 MODULE_DESCRIPTION("Xilinx TMR Manager Driver");