55 static inline bool has_quirk_single_word_read(struct eeprom_93xx46_dev *edev)  in has_quirk_single_word_read()  argument
57 	return edev->pdata->quirks & EEPROM_93XX46_QUIRK_SINGLE_WORD_READ;  in has_quirk_single_word_read()
60 static inline bool has_quirk_instruction_length(struct eeprom_93xx46_dev *edev)  in has_quirk_instruction_length()  argument
62 	return edev->pdata->quirks & EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH;  in has_quirk_instruction_length()
65 static inline bool has_quirk_extra_read_cycle(struct eeprom_93xx46_dev *edev)  in has_quirk_extra_read_cycle()  argument
67 	return edev->pdata->quirks & EEPROM_93XX46_QUIRK_EXTRA_READ_CYCLE;  in has_quirk_extra_read_cycle()
73 	struct eeprom_93xx46_dev *edev = priv;  in eeprom_93xx46_read()  local
77 	if (unlikely(off >= edev->size))  in eeprom_93xx46_read()
79 	if ((off + count) > edev->size)  in eeprom_93xx46_read()
80 		count = edev->size - off;  in eeprom_93xx46_read()
84 	mutex_lock(&edev->lock);  in eeprom_93xx46_read()
86 	if (edev->pdata->prepare)  in eeprom_93xx46_read()
87 		edev->pdata->prepare(edev);  in eeprom_93xx46_read()
92 		u16 cmd_addr = OP_READ << edev->addrlen;  in eeprom_93xx46_read()
96 		if (edev->addrlen == 7) {  in eeprom_93xx46_read()
99 			if (has_quirk_single_word_read(edev))  in eeprom_93xx46_read()
104 			if (has_quirk_single_word_read(edev))  in eeprom_93xx46_read()
108 		dev_dbg(&edev->spi->dev, "read cmd 0x%x, %d Hz\n",  in eeprom_93xx46_read()
109 			cmd_addr, edev->spi->max_speed_hz);  in eeprom_93xx46_read()
111 		if (has_quirk_extra_read_cycle(edev)) {  in eeprom_93xx46_read()
128 		err = spi_sync(edev->spi, &m);  in eeprom_93xx46_read()
133 			dev_err(&edev->spi->dev, "read %zu bytes at %d: err. %d\n",  in eeprom_93xx46_read()
143 	if (edev->pdata->finish)  in eeprom_93xx46_read()
144 		edev->pdata->finish(edev);  in eeprom_93xx46_read()
146 	mutex_unlock(&edev->lock);  in eeprom_93xx46_read()
151 static int eeprom_93xx46_ew(struct eeprom_93xx46_dev *edev, int is_on)  in eeprom_93xx46_ew()  argument
158 	cmd_addr = OP_START << edev->addrlen;  in eeprom_93xx46_ew()
159 	if (edev->addrlen == 7) {  in eeprom_93xx46_ew()
167 	if (has_quirk_instruction_length(edev)) {  in eeprom_93xx46_ew()
172 	dev_dbg(&edev->spi->dev, "ew%s cmd 0x%04x, %d bits\n",  in eeprom_93xx46_ew()
183 	mutex_lock(&edev->lock);  in eeprom_93xx46_ew()
185 	if (edev->pdata->prepare)  in eeprom_93xx46_ew()
186 		edev->pdata->prepare(edev);  in eeprom_93xx46_ew()
188 	ret = spi_sync(edev->spi, &m);  in eeprom_93xx46_ew()
192 		dev_err(&edev->spi->dev, "erase/write %sable error %d\n",  in eeprom_93xx46_ew()
195 	if (edev->pdata->finish)  in eeprom_93xx46_ew()
196 		edev->pdata->finish(edev);  in eeprom_93xx46_ew()
198 	mutex_unlock(&edev->lock);  in eeprom_93xx46_ew()
203 eeprom_93xx46_write_word(struct eeprom_93xx46_dev *edev,  in eeprom_93xx46_write_word()  argument
211 	cmd_addr = OP_WRITE << edev->addrlen;  in eeprom_93xx46_write_word()
213 	if (edev->addrlen == 7) {  in eeprom_93xx46_write_word()
223 	dev_dbg(&edev->spi->dev, "write cmd 0x%x\n", cmd_addr);  in eeprom_93xx46_write_word()
238 	ret = spi_sync(edev->spi, &m);  in eeprom_93xx46_write_word()
247 	struct eeprom_93xx46_dev *edev = priv;  in eeprom_93xx46_write()  local
251 	if (unlikely(off >= edev->size))  in eeprom_93xx46_write()
253 	if ((off + count) > edev->size)  in eeprom_93xx46_write()
254 		count = edev->size - off;  in eeprom_93xx46_write()
259 	if (edev->addrlen == 6) {  in eeprom_93xx46_write()
265 	ret = eeprom_93xx46_ew(edev, 1);  in eeprom_93xx46_write()
269 	mutex_lock(&edev->lock);  in eeprom_93xx46_write()
271 	if (edev->pdata->prepare)  in eeprom_93xx46_write()
272 		edev->pdata->prepare(edev);  in eeprom_93xx46_write()
275 		ret = eeprom_93xx46_write_word(edev, &buf[i], off + i);  in eeprom_93xx46_write()
277 			dev_err(&edev->spi->dev, "write failed at %d: %d\n",  in eeprom_93xx46_write()
283 	if (edev->pdata->finish)  in eeprom_93xx46_write()
284 		edev->pdata->finish(edev);  in eeprom_93xx46_write()
286 	mutex_unlock(&edev->lock);  in eeprom_93xx46_write()
289 	eeprom_93xx46_ew(edev, 0);  in eeprom_93xx46_write()
293 static int eeprom_93xx46_eral(struct eeprom_93xx46_dev *edev)  in eeprom_93xx46_eral()  argument
295 	struct eeprom_93xx46_platform_data *pd = edev->pdata;  in eeprom_93xx46_eral()
301 	cmd_addr = OP_START << edev->addrlen;  in eeprom_93xx46_eral()
302 	if (edev->addrlen == 7) {  in eeprom_93xx46_eral()
310 	if (has_quirk_instruction_length(edev)) {  in eeprom_93xx46_eral()
315 	dev_dbg(&edev->spi->dev, "eral cmd 0x%04x, %d bits\n", cmd_addr, bits);  in eeprom_93xx46_eral()
325 	mutex_lock(&edev->lock);  in eeprom_93xx46_eral()
327 	if (edev->pdata->prepare)  in eeprom_93xx46_eral()
328 		edev->pdata->prepare(edev);  in eeprom_93xx46_eral()
330 	ret = spi_sync(edev->spi, &m);  in eeprom_93xx46_eral()
332 		dev_err(&edev->spi->dev, "erase error %d\n", ret);  in eeprom_93xx46_eral()
337 		pd->finish(edev);  in eeprom_93xx46_eral()
339 	mutex_unlock(&edev->lock);  in eeprom_93xx46_eral()
347 	struct eeprom_93xx46_dev *edev = dev_get_drvdata(dev);  in eeprom_93xx46_store_erase()  local
352 		ret = eeprom_93xx46_ew(edev, 1);  in eeprom_93xx46_store_erase()
355 		ret = eeprom_93xx46_eral(edev);  in eeprom_93xx46_store_erase()
358 		ret = eeprom_93xx46_ew(edev, 0);  in eeprom_93xx46_store_erase()
368 	struct eeprom_93xx46_dev *edev = context;  in select_assert()  local
370 	gpiod_set_value_cansleep(edev->pdata->select, 1);  in select_assert()
375 	struct eeprom_93xx46_dev *edev = context;  in select_deassert()  local
377 	gpiod_set_value_cansleep(edev->pdata->select, 0);  in select_deassert()
442 	struct eeprom_93xx46_dev *edev;  in eeprom_93xx46_probe()  local
457 	edev = kzalloc(sizeof(*edev), GFP_KERNEL);  in eeprom_93xx46_probe()
458 	if (!edev)  in eeprom_93xx46_probe()
462 		edev->addrlen = 7;  in eeprom_93xx46_probe()
464 		edev->addrlen = 6;  in eeprom_93xx46_probe()
471 	mutex_init(&edev->lock);  in eeprom_93xx46_probe()
473 	edev->spi = spi;  in eeprom_93xx46_probe()
474 	edev->pdata = pd;  in eeprom_93xx46_probe()
476 	edev->size = 128;  in eeprom_93xx46_probe()
477 	edev->nvmem_config.name = dev_name(&spi->dev);  in eeprom_93xx46_probe()
478 	edev->nvmem_config.dev = &spi->dev;  in eeprom_93xx46_probe()
479 	edev->nvmem_config.read_only = pd->flags & EE_READONLY;  in eeprom_93xx46_probe()
480 	edev->nvmem_config.root_only = true;  in eeprom_93xx46_probe()
481 	edev->nvmem_config.owner = THIS_MODULE;  in eeprom_93xx46_probe()
482 	edev->nvmem_config.compat = true;  in eeprom_93xx46_probe()
483 	edev->nvmem_config.base_dev = &spi->dev;  in eeprom_93xx46_probe()
484 	edev->nvmem_config.reg_read = eeprom_93xx46_read;  in eeprom_93xx46_probe()
485 	edev->nvmem_config.reg_write = eeprom_93xx46_write;  in eeprom_93xx46_probe()
486 	edev->nvmem_config.priv = edev;  in eeprom_93xx46_probe()
487 	edev->nvmem_config.stride = 4;  in eeprom_93xx46_probe()
488 	edev->nvmem_config.word_size = 1;  in eeprom_93xx46_probe()
489 	edev->nvmem_config.size = edev->size;  in eeprom_93xx46_probe()
491 	edev->nvmem = nvmem_register(&edev->nvmem_config);  in eeprom_93xx46_probe()
492 	if (IS_ERR(edev->nvmem)) {  in eeprom_93xx46_probe()
493 		err = PTR_ERR(edev->nvmem);  in eeprom_93xx46_probe()
506 	spi_set_drvdata(spi, edev);  in eeprom_93xx46_probe()
509 	kfree(edev);  in eeprom_93xx46_probe()
515 	struct eeprom_93xx46_dev *edev = spi_get_drvdata(spi);  in eeprom_93xx46_remove()  local
517 	nvmem_unregister(edev->nvmem);  in eeprom_93xx46_remove()
519 	if (!(edev->pdata->flags & EE_READONLY))  in eeprom_93xx46_remove()
522 	kfree(edev);  in eeprom_93xx46_remove()