0161dd0938
Add support for GPIO controller feature of AW9523B. Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com> Co-authored-by: Benjamin Cabé <kartben@gmail.com>
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/*
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* Copyright (c) 2024 TOKITA Hiroshi
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT awinic_aw9523b
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#include <zephyr/drivers/i2c.h>
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#include <zephyr/drivers/mfd/aw9523b.h>
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#include <zephyr/kernel.h>
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#define AW9523B_ID_VALUE 0x23
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struct mfd_aw9523b_config {
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struct i2c_dt_spec i2c;
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};
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struct mfd_aw9523b_data {
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struct k_sem lock;
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};
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static int mfd_aw9523b_init(const struct device *dev)
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{
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const struct mfd_aw9523b_config *config = dev->config;
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struct mfd_aw9523b_data *data = dev->data;
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uint8_t reg;
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int ret;
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if (!i2c_is_ready_dt(&config->i2c)) {
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return -ENODEV;
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}
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k_sem_init(&data->lock, 1, 1);
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ret = i2c_reg_read_byte_dt(&config->i2c, AW9523B_REG_ID, ®);
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if (ret) {
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return ret;
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};
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if (reg != AW9523B_ID_VALUE) {
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return -1;
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}
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return 0;
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}
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struct k_sem *aw9523b_get_lock(const struct device *dev)
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{
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struct mfd_aw9523b_data *data = dev->data;
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return &data->lock;
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}
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#define MFD_AW9523B_DEFINE(inst) \
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static const struct mfd_aw9523b_config config##inst = { \
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.i2c = I2C_DT_SPEC_INST_GET(inst), \
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}; \
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\
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static struct mfd_aw9523b_data data##inst; \
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\
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DEVICE_DT_INST_DEFINE(inst, mfd_aw9523b_init, NULL, &data##inst, &config##inst, \
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POST_KERNEL, CONFIG_MFD_INIT_PRIORITY, NULL);
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DT_INST_FOREACH_STATUS_OKAY(MFD_AW9523B_DEFINE)
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