1 // SPDX-License-Identifier: GPL-2.0-or-later
42  * Don't return -ERESTARTSYS if we can't get a token, the MTD core
49 	struct powernv_flash *info = (struct powernv_flash *)mtd->priv;  in powernv_flash_async_op()
50 	struct device *dev = &mtd->dev;  in powernv_flash_async_op()
60 		if (token != -ERESTARTSYS)  in powernv_flash_async_op()
63 			token = -EINTR;  in powernv_flash_async_op()
69 		rc = opal_flash_read(info->id, offset, __pa(buf), len, token);  in powernv_flash_async_op()
72 		rc = opal_flash_write(info->id, offset, __pa(buf), len, token);  in powernv_flash_async_op()
75 		rc = opal_flash_erase(info->id, offset, len, token);  in powernv_flash_async_op()
80 		return -EIO;  in powernv_flash_async_op()
98 			rc = -EINTR;  in powernv_flash_async_op()
136  * Returns 0 if read successful, or -ERRNO if an error occurred
153  * Returns 0 if write successful, -ERRNO if error occurred
165  * @erase: the erase info
166  * Returns 0 if erase successful or -ERRNO if an error occurred
168 static int powernv_flash_erase(struct mtd_info *mtd, struct erase_info *erase)  in powernv_flash_erase()  argument
172 	rc =  powernv_flash_async_op(mtd, FLASH_OP_ERASE, erase->addr,  in powernv_flash_erase()
173 			erase->len, NULL, NULL);  in powernv_flash_erase()
175 		erase->fail_addr = erase->addr;  in powernv_flash_erase()
181  * powernv_flash_set_driver_info - Fill the mtd_info structure and docg3
188 	u64 size;  in powernv_flash_set_driver_info()  local
192 	rc = of_property_read_u32(dev->of_node, "ibm,flash-block-size",  in powernv_flash_set_driver_info()
195 		dev_err(dev, "couldn't get resource block size information\n");  in powernv_flash_set_driver_info()
199 	rc = of_property_read_u64(dev->of_node, "reg", &size);  in powernv_flash_set_driver_info()
201 		dev_err(dev, "couldn't get resource size information\n");  in powernv_flash_set_driver_info()
209 	mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFP", dev->of_node);  in powernv_flash_set_driver_info()
210 	if (!mtd->name)  in powernv_flash_set_driver_info()
211 		return -ENOMEM;  in powernv_flash_set_driver_info()
213 	mtd->type = MTD_NORFLASH;  in powernv_flash_set_driver_info()
214 	mtd->flags = MTD_WRITEABLE;  in powernv_flash_set_driver_info()
215 	mtd->size = size;  in powernv_flash_set_driver_info()
216 	mtd->erasesize = erase_size;  in powernv_flash_set_driver_info()
217 	mtd->writebufsize = mtd->writesize = 1;  in powernv_flash_set_driver_info()
218 	mtd->owner = THIS_MODULE;  in powernv_flash_set_driver_info()
219 	mtd->_erase = powernv_flash_erase;  in powernv_flash_set_driver_info()
220 	mtd->_read = powernv_flash_read;  in powernv_flash_set_driver_info()
221 	mtd->_write = powernv_flash_write;  in powernv_flash_set_driver_info()
222 	mtd->dev.parent = dev;  in powernv_flash_set_driver_info()
223 	mtd_set_of_node(mtd, dev->of_node);  in powernv_flash_set_driver_info()
231  * Returns 0 on success, -ENOMEM, -ENXIO on error
235 	struct device *dev = &pdev->dev;  in powernv_flash_probe()
241 		return -ENOMEM;  in powernv_flash_probe()
243 	data->mtd.priv = data;  in powernv_flash_probe()
245 	ret = of_property_read_u32(dev->of_node, "ibm,opal-id", &(data->id));  in powernv_flash_probe()
247 		dev_err(dev, "no device property 'ibm,opal-id'\n");  in powernv_flash_probe()
251 	ret = powernv_flash_set_driver_info(dev, &data->mtd);  in powernv_flash_probe()
262 	return mtd_device_register(&data->mtd, NULL, 0);  in powernv_flash_probe()
266  * op_release - Release the driver
273 	struct powernv_flash *data = dev_get_drvdata(&(pdev->dev));  in powernv_flash_release()
276 	WARN_ON(mtd_device_unregister(&data->mtd));  in powernv_flash_release()
280 	{ .compatible = "ibm,opal-flash" },