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- // SPDX-License-Identifier: GPL-2.0+
- /*
- *
- * Copyright (c) 2015 Free Electrons
- * Copyright (c) 2015 NextThing Co.
- * Copyright (c) 2018 Microchip Technology, Inc.
- *
- * Maxime Ripard <maxime.ripard@free-electrons.com>
- * Eugen Hristev <eugen.hristev@microchip.com>
- *
- */
- #define LOG_CATEGORY UCLASS_W1_EEPROM
- #include <common.h>
- #include <dm.h>
- #include <log.h>
- #include <w1.h>
- #include <w1-eeprom.h>
- #include <dm/device-internal.h>
- int w1_eeprom_read_buf(struct udevice *dev, unsigned int offset,
- u8 *buf, unsigned int count)
- {
- const struct w1_eeprom_ops *ops = device_get_ops(dev);
- u64 id = 0;
- int ret;
- if (!ops->read_buf)
- return -ENOSYS;
- ret = w1_eeprom_get_id(dev, &id);
- if (ret)
- return ret;
- if (!id)
- return -ENODEV;
- return ops->read_buf(dev, offset, buf, count);
- }
- int w1_eeprom_get_id(struct udevice *dev, u64 *id)
- {
- struct w1_device *w1 = dev_get_parent_plat(dev);
- if (!w1)
- return -ENODEV;
- *id = w1->id;
- return 0;
- }
- UCLASS_DRIVER(w1_eeprom) = {
- .name = "w1_eeprom",
- .id = UCLASS_W1_EEPROM,
- .flags = DM_UC_FLAG_SEQ_ALIAS,
- #if CONFIG_IS_ENABLED(OF_CONTROL)
- .post_bind = dm_scan_fdt_dev,
- #endif
- };
- int w1_eeprom_dm_init(void)
- {
- struct udevice *dev;
- struct uclass *uc;
- int ret;
- ret = uclass_get(UCLASS_W1_EEPROM, &uc);
- if (ret) {
- debug("W1_EEPROM uclass not available\n");
- return ret;
- }
- uclass_foreach_dev(dev, uc) {
- ret = device_probe(dev);
- if (ret == -ENODEV) { /* No such device. */
- debug("W1_EEPROM not available.\n");
- continue;
- }
- if (ret) { /* Other error. */
- printf("W1_EEPROM probe failed, error %d\n", ret);
- continue;
- }
- }
- return 0;
- }
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