52 static inline bool has_quirk_single_word_read(struct eeprom_93xx46_dev *edev)  in has_quirk_single_word_read()  argument
54 	return edev->pdata->quirks & EEPROM_93XX46_QUIRK_SINGLE_WORD_READ;  in has_quirk_single_word_read()
57 static inline bool has_quirk_instruction_length(struct eeprom_93xx46_dev *edev)  in has_quirk_instruction_length()  argument
59 	return edev->pdata->quirks & EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH;  in has_quirk_instruction_length()
62 static inline bool has_quirk_extra_read_cycle(struct eeprom_93xx46_dev *edev)  in has_quirk_extra_read_cycle()  argument
64 	return edev->pdata->quirks & EEPROM_93XX46_QUIRK_EXTRA_READ_CYCLE;  in has_quirk_extra_read_cycle()
70 	struct eeprom_93xx46_dev *edev = priv;  in eeprom_93xx46_read()  local
74 	if (unlikely(off >= edev->size))  in eeprom_93xx46_read()
76 	if ((off + count) > edev->size)  in eeprom_93xx46_read()
77 		count = edev->size - off;  in eeprom_93xx46_read()
81 	mutex_lock(&edev->lock);  in eeprom_93xx46_read()
83 	if (edev->pdata->prepare)  in eeprom_93xx46_read()
84 		edev->pdata->prepare(edev);  in eeprom_93xx46_read()
89 		u16 cmd_addr = OP_READ << edev->addrlen;  in eeprom_93xx46_read()
93 		if (edev->addrlen == 7) {  in eeprom_93xx46_read()
96 			if (has_quirk_single_word_read(edev))  in eeprom_93xx46_read()
101 			if (has_quirk_single_word_read(edev))  in eeprom_93xx46_read()
105 		dev_dbg(&edev->spi->dev, "read cmd 0x%x, %d Hz\n",  in eeprom_93xx46_read()
106 			cmd_addr, edev->spi->max_speed_hz);  in eeprom_93xx46_read()
108 		if (has_quirk_extra_read_cycle(edev)) {  in eeprom_93xx46_read()
125 		err = spi_sync(edev->spi, &m);  in eeprom_93xx46_read()
130 			dev_err(&edev->spi->dev, "read %zu bytes at %d: err. %d\n",  in eeprom_93xx46_read()
140 	if (edev->pdata->finish)  in eeprom_93xx46_read()
141 		edev->pdata->finish(edev);  in eeprom_93xx46_read()
143 	mutex_unlock(&edev->lock);  in eeprom_93xx46_read()
148 static int eeprom_93xx46_ew(struct eeprom_93xx46_dev *edev, int is_on)  in eeprom_93xx46_ew()  argument
155 	cmd_addr = OP_START << edev->addrlen;  in eeprom_93xx46_ew()
156 	if (edev->addrlen == 7) {  in eeprom_93xx46_ew()
164 	if (has_quirk_instruction_length(edev)) {  in eeprom_93xx46_ew()
169 	dev_dbg(&edev->spi->dev, "ew%s cmd 0x%04x, %d bits\n",  in eeprom_93xx46_ew()
180 	mutex_lock(&edev->lock);  in eeprom_93xx46_ew()
182 	if (edev->pdata->prepare)  in eeprom_93xx46_ew()
183 		edev->pdata->prepare(edev);  in eeprom_93xx46_ew()
185 	ret = spi_sync(edev->spi, &m);  in eeprom_93xx46_ew()
189 		dev_err(&edev->spi->dev, "erase/write %sable error %d\n",  in eeprom_93xx46_ew()
192 	if (edev->pdata->finish)  in eeprom_93xx46_ew()
193 		edev->pdata->finish(edev);  in eeprom_93xx46_ew()
195 	mutex_unlock(&edev->lock);  in eeprom_93xx46_ew()
200 eeprom_93xx46_write_word(struct eeprom_93xx46_dev *edev,  in eeprom_93xx46_write_word()  argument
208 	cmd_addr = OP_WRITE << edev->addrlen;  in eeprom_93xx46_write_word()
210 	if (edev->addrlen == 7) {  in eeprom_93xx46_write_word()
220 	dev_dbg(&edev->spi->dev, "write cmd 0x%x\n", cmd_addr);  in eeprom_93xx46_write_word()
235 	ret = spi_sync(edev->spi, &m);  in eeprom_93xx46_write_word()
244 	struct eeprom_93xx46_dev *edev = priv;  in eeprom_93xx46_write()  local
248 	if (unlikely(off >= edev->size))  in eeprom_93xx46_write()
250 	if ((off + count) > edev->size)  in eeprom_93xx46_write()
251 		count = edev->size - off;  in eeprom_93xx46_write()
256 	if (edev->addrlen == 6) {  in eeprom_93xx46_write()
262 	ret = eeprom_93xx46_ew(edev, 1);  in eeprom_93xx46_write()
266 	mutex_lock(&edev->lock);  in eeprom_93xx46_write()
268 	if (edev->pdata->prepare)  in eeprom_93xx46_write()
269 		edev->pdata->prepare(edev);  in eeprom_93xx46_write()
272 		ret = eeprom_93xx46_write_word(edev, &buf[i], off + i);  in eeprom_93xx46_write()
274 			dev_err(&edev->spi->dev, "write failed at %d: %d\n",  in eeprom_93xx46_write()
280 	if (edev->pdata->finish)  in eeprom_93xx46_write()
281 		edev->pdata->finish(edev);  in eeprom_93xx46_write()
283 	mutex_unlock(&edev->lock);  in eeprom_93xx46_write()
286 	eeprom_93xx46_ew(edev, 0);  in eeprom_93xx46_write()
290 static int eeprom_93xx46_eral(struct eeprom_93xx46_dev *edev)  in eeprom_93xx46_eral()  argument
292 	struct eeprom_93xx46_platform_data *pd = edev->pdata;  in eeprom_93xx46_eral()
298 	cmd_addr = OP_START << edev->addrlen;  in eeprom_93xx46_eral()
299 	if (edev->addrlen == 7) {  in eeprom_93xx46_eral()
307 	if (has_quirk_instruction_length(edev)) {  in eeprom_93xx46_eral()
312 	dev_dbg(&edev->spi->dev, "eral cmd 0x%04x, %d bits\n", cmd_addr, bits);  in eeprom_93xx46_eral()
322 	mutex_lock(&edev->lock);  in eeprom_93xx46_eral()
324 	if (edev->pdata->prepare)  in eeprom_93xx46_eral()
325 		edev->pdata->prepare(edev);  in eeprom_93xx46_eral()
327 	ret = spi_sync(edev->spi, &m);  in eeprom_93xx46_eral()
329 		dev_err(&edev->spi->dev, "erase error %d\n", ret);  in eeprom_93xx46_eral()
334 		pd->finish(edev);  in eeprom_93xx46_eral()
336 	mutex_unlock(&edev->lock);  in eeprom_93xx46_eral()
344 	struct eeprom_93xx46_dev *edev = dev_get_drvdata(dev);  in eeprom_93xx46_store_erase()  local
349 		ret = eeprom_93xx46_ew(edev, 1);  in eeprom_93xx46_store_erase()
352 		ret = eeprom_93xx46_eral(edev);  in eeprom_93xx46_store_erase()
355 		ret = eeprom_93xx46_ew(edev, 0);  in eeprom_93xx46_store_erase()
365 	struct eeprom_93xx46_dev *edev = context;  in select_assert()  local
367 	gpiod_set_value_cansleep(edev->pdata->select, 1);  in select_assert()
372 	struct eeprom_93xx46_dev *edev = context;  in select_deassert()  local
374 	gpiod_set_value_cansleep(edev->pdata->select, 0);  in select_deassert()
439 	struct eeprom_93xx46_dev *edev;  in eeprom_93xx46_probe()  local
454 	edev = devm_kzalloc(&spi->dev, sizeof(*edev), GFP_KERNEL);  in eeprom_93xx46_probe()
455 	if (!edev)  in eeprom_93xx46_probe()
459 		edev->addrlen = 7;  in eeprom_93xx46_probe()
461 		edev->addrlen = 6;  in eeprom_93xx46_probe()
467 	mutex_init(&edev->lock);  in eeprom_93xx46_probe()
469 	edev->spi = spi;  in eeprom_93xx46_probe()
470 	edev->pdata = pd;  in eeprom_93xx46_probe()
472 	edev->size = 128;  in eeprom_93xx46_probe()
473 	edev->nvmem_config.type = NVMEM_TYPE_EEPROM;  in eeprom_93xx46_probe()
474 	edev->nvmem_config.name = dev_name(&spi->dev);  in eeprom_93xx46_probe()
475 	edev->nvmem_config.dev = &spi->dev;  in eeprom_93xx46_probe()
476 	edev->nvmem_config.read_only = pd->flags & EE_READONLY;  in eeprom_93xx46_probe()
477 	edev->nvmem_config.root_only = true;  in eeprom_93xx46_probe()
478 	edev->nvmem_config.owner = THIS_MODULE;  in eeprom_93xx46_probe()
479 	edev->nvmem_config.compat = true;  in eeprom_93xx46_probe()
480 	edev->nvmem_config.base_dev = &spi->dev;  in eeprom_93xx46_probe()
481 	edev->nvmem_config.reg_read = eeprom_93xx46_read;  in eeprom_93xx46_probe()
482 	edev->nvmem_config.reg_write = eeprom_93xx46_write;  in eeprom_93xx46_probe()
483 	edev->nvmem_config.priv = edev;  in eeprom_93xx46_probe()
484 	edev->nvmem_config.stride = 4;  in eeprom_93xx46_probe()
485 	edev->nvmem_config.word_size = 1;  in eeprom_93xx46_probe()
486 	edev->nvmem_config.size = edev->size;  in eeprom_93xx46_probe()
488 	edev->nvmem = devm_nvmem_register(&spi->dev, &edev->nvmem_config);  in eeprom_93xx46_probe()
489 	if (IS_ERR(edev->nvmem))  in eeprom_93xx46_probe()
490 		return PTR_ERR(edev->nvmem);  in eeprom_93xx46_probe()
501 	spi_set_drvdata(spi, edev);  in eeprom_93xx46_probe()
507 	struct eeprom_93xx46_dev *edev = spi_get_drvdata(spi);  in eeprom_93xx46_remove()  local
509 	if (!(edev->pdata->flags & EE_READONLY))  in eeprom_93xx46_remove()