]>
git.ipfire.org Git - thirdparty/u-boot.git/blob - drivers/w1-eeprom/w1-eeprom-uclass.c
1 // SPDX-License-Identifier: GPL-2.0+
4 * Copyright (c) 2015 Free Electrons
5 * Copyright (c) 2015 NextThing Co.
6 * Copyright (c) 2018 Microchip Technology, Inc.
8 * Maxime Ripard <maxime.ripard@free-electrons.com>
9 * Eugen Hristev <eugen.hristev@microchip.com>
16 #include <w1-eeprom.h>
18 #include <dm/device-internal.h>
20 int w1_eeprom_read_buf(struct udevice
*dev
, unsigned int offset
,
21 u8
*buf
, unsigned int count
)
23 const struct w1_eeprom_ops
*ops
= device_get_ops(dev
);
30 ret
= w1_eeprom_get_id(dev
, &id
);
36 return ops
->read_buf(dev
, offset
, buf
, count
);
39 int w1_eeprom_register_new_device(u64 id
)
41 u8 family
= id
& 0xff;
45 for (ret
= uclass_first_device(UCLASS_W1_EEPROM
, &dev
);
47 uclass_next_device(&dev
)) {
49 debug("cannot find w1 eeprom dev\n");
52 if (dev_get_driver_data(dev
) == family
) {
55 w1
= dev_get_parent_platdata(dev
);
56 if (w1
->id
) /* device already in use */
59 debug("%s: Match found: %s:%s %llx\n", __func__
,
60 dev
->name
, dev
->driver
->name
, id
);
65 debug("%s: No matches found: error %d\n", __func__
, ret
);
70 int w1_eeprom_get_id(struct udevice
*dev
, u64
*id
)
72 struct w1_device
*w1
= dev_get_parent_platdata(dev
);
81 UCLASS_DRIVER(w1_eeprom
) = {
83 .id
= UCLASS_W1_EEPROM
,
84 .flags
= DM_UC_FLAG_SEQ_ALIAS
,
85 #if CONFIG_IS_ENABLED(OF_CONTROL)
86 .post_bind
= dm_scan_fdt_dev
,
90 int w1_eeprom_dm_init(void)
96 ret
= uclass_get(UCLASS_W1_EEPROM
, &uc
);
98 debug("W1_EEPROM uclass not available\n");
102 uclass_foreach_dev(dev
, uc
) {
103 ret
= device_probe(dev
);
104 if (ret
== -ENODEV
) { /* No such device. */
105 debug("W1_EEPROM not available.\n");
109 if (ret
) { /* Other error. */
110 printf("W1_EEPROM probe failed, error %d\n", ret
);