175  * @ks: pointer to switch instance
185 static inline __be16 create_spi_cmd(struct ks8995_switch *ks, int cmd,  in create_spi_cmd()  argument
191 	result <<= ks->chip->addr_width + ks->chip->addr_shift;  in create_spi_cmd()
193 	result |= address << ks->chip->addr_shift;  in create_spi_cmd()
198 static int ks8995_read(struct ks8995_switch *ks, char *buf,  in ks8995_read()  argument
206 	cmd = create_spi_cmd(ks, KS8995_CMD_READ, offset);  in ks8995_read()
219 	mutex_lock(&ks->lock);  in ks8995_read()
220 	err = spi_sync(ks->spi, &m);  in ks8995_read()
221 	mutex_unlock(&ks->lock);  in ks8995_read()
226 static int ks8995_write(struct ks8995_switch *ks, char *buf,  in ks8995_write()  argument
234 	cmd = create_spi_cmd(ks, KS8995_CMD_WRITE, offset);  in ks8995_write()
247 	mutex_lock(&ks->lock);  in ks8995_write()
248 	err = spi_sync(ks->spi, &m);  in ks8995_write()
249 	mutex_unlock(&ks->lock);  in ks8995_write()
254 static inline int ks8995_read_reg(struct ks8995_switch *ks, u8 addr, u8 *buf)  in ks8995_read_reg()  argument
256 	return ks8995_read(ks, buf, addr, 1) != 1;  in ks8995_read_reg()
259 static inline int ks8995_write_reg(struct ks8995_switch *ks, u8 addr, u8 val)  in ks8995_write_reg()  argument
263 	return ks8995_write(ks, &buf, addr, 1) != 1;  in ks8995_write_reg()
268 static int ks8995_stop(struct ks8995_switch *ks)  in ks8995_stop()  argument
270 	return ks8995_write_reg(ks, KS8995_REG_ID1, 0);  in ks8995_stop()
273 static int ks8995_start(struct ks8995_switch *ks)  in ks8995_start()  argument
275 	return ks8995_write_reg(ks, KS8995_REG_ID1, 1);  in ks8995_start()
278 static int ks8995_reset(struct ks8995_switch *ks)  in ks8995_reset()  argument
282 	err = ks8995_stop(ks);  in ks8995_reset()
288 	return ks8995_start(ks);  in ks8995_reset()
316  * @ks: pointer to switch instance
320 static int ks8995_get_revision(struct ks8995_switch *ks)  in ks8995_get_revision()  argument
326 	err = ks8995_read_reg(ks, KS8995_REG_ID0, &id0);  in ks8995_get_revision()
333 	if (id0 != ks->chip->family_id) {  in ks8995_get_revision()
334 		dev_err(&ks->spi->dev, "chip family id mismatch: expected 0x%02x but 0x%02x read\n",  in ks8995_get_revision()
335 			ks->chip->family_id, id0);  in ks8995_get_revision()
340 	switch (ks->chip->family_id) {  in ks8995_get_revision()
343 		err = ks8995_read_reg(ks, KS8995_REG_ID1, &id1);  in ks8995_get_revision()
351 		    (get_chip_id(id1) == ks->chip->chip_id)) {  in ks8995_get_revision()
353 			ks->revision_id = get_chip_rev(id1);  in ks8995_get_revision()
356 			err = ks8995_read_reg(ks, KS8995_REG_ID1, &ksz8864_id);  in ks8995_get_revision()
363 			    (ks->chip->chip_id == KSZ8864_CHIP_ID)) {  in ks8995_get_revision()
364 				ks->revision_id = get_chip_rev(id1);  in ks8995_get_revision()
368 			dev_err(&ks->spi->dev, "unsupported chip id for KS8995 family: 0x%02x\n",  in ks8995_get_revision()
375 		err = ks8995_read_reg(ks, KS8995_REG_ID1, &id1);  in ks8995_get_revision()
381 		if (get_chip_id(id1) == ks->chip->chip_id) {  in ks8995_get_revision()
382 			ks->revision_id = get_chip_rev(id1);  in ks8995_get_revision()
384 			dev_err(&ks->spi->dev, "unsupported chip id for KSZ8795 family: 0x%02x\n",  in ks8995_get_revision()
390 		dev_err(&ks->spi->dev, "unsupported family id: 0x%02x\n", id0);  in ks8995_get_revision()
411 	struct ks8995_switch *ks;  in ks8995_probe()  local
420 	ks = devm_kzalloc(&spi->dev, sizeof(*ks), GFP_KERNEL);  in ks8995_probe()
421 	if (!ks)  in ks8995_probe()
424 	mutex_init(&ks->lock);  in ks8995_probe()
425 	ks->spi = spi;  in ks8995_probe()
426 	ks->chip = &ks8995_chip[variant];  in ks8995_probe()
428 	ks->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",  in ks8995_probe()
430 	err = PTR_ERR_OR_ZERO(ks->reset_gpio);  in ks8995_probe()
437 	err = gpiod_set_consumer_name(ks->reset_gpio, "switch-reset");  in ks8995_probe()
443 	gpiod_set_value_cansleep(ks->reset_gpio, 0);  in ks8995_probe()
445 	spi_set_drvdata(spi, ks);  in ks8995_probe()
455 	err = ks8995_get_revision(ks);  in ks8995_probe()
459 	memcpy(&ks->regs_attr, &ks8995_registers_attr, sizeof(ks->regs_attr));  in ks8995_probe()
460 	ks->regs_attr.size = ks->chip->regs_size;  in ks8995_probe()
462 	err = ks8995_reset(ks);  in ks8995_probe()
466 	sysfs_attr_init(&ks->regs_attr.attr);  in ks8995_probe()
467 	err = sysfs_create_bin_file(&spi->dev.kobj, &ks->regs_attr);  in ks8995_probe()
475 		 ks->chip->name, ks->chip->chip_id, ks->revision_id);  in ks8995_probe()
482 	struct ks8995_switch *ks = spi_get_drvdata(spi);  in ks8995_remove()  local
484 	sysfs_remove_bin_file(&spi->dev.kobj, &ks->regs_attr);  in ks8995_remove()
487 	gpiod_set_value_cansleep(ks->reset_gpio, 1);  in ks8995_remove()