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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2021 YADRO
- *
- * Authors:
- * Nikita Shubin <n.shubin@yadro.com>
- *
- * derivate: lib/utils/gpio/gpio.c
- * Authors:
- * Anup Patel <anup.patel@wdc.com>
- */
- #include <sbi/sbi_error.h>
- #include <sbi_utils/i2c/i2c.h>
- static SBI_LIST_HEAD(i2c_adapters_list);
- struct i2c_adapter *i2c_adapter_find(int id)
- {
- struct sbi_dlist *pos;
- sbi_list_for_each(pos, &(i2c_adapters_list)) {
- struct i2c_adapter *adap = to_i2c_adapter(pos);
- if (adap->id == id)
- return adap;
- }
- return NULL;
- }
- int i2c_adapter_add(struct i2c_adapter *ia)
- {
- if (!ia)
- return SBI_EINVAL;
- if (i2c_adapter_find(ia->id))
- return SBI_EALREADY;
- sbi_list_add(&(ia->node), &(i2c_adapters_list));
- return 0;
- }
- void i2c_adapter_remove(struct i2c_adapter *ia)
- {
- if (!ia)
- return;
- sbi_list_del(&(ia->node));
- }
- int i2c_adapter_write(struct i2c_adapter *ia, uint8_t addr, uint8_t reg,
- uint8_t *buffer, int len)
- {
- if (!ia)
- return SBI_EINVAL;
- if (!ia->write)
- return SBI_ENOSYS;
- return ia->write(ia, addr, reg, buffer, len);
- }
- int i2c_adapter_read(struct i2c_adapter *ia, uint8_t addr, uint8_t reg,
- uint8_t *buffer, int len)
- {
- if (!ia)
- return SBI_EINVAL;
- if (!ia->read)
- return SBI_ENOSYS;
- return ia->read(ia, addr, reg, buffer, len);
- }
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