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drivers: i2c: litex: add mutex in litei2c

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add mutex for the litei2c driver

Signed-off-by: Fin Maaß <f.maass@vogl-electronic.com>
This commit is contained in:
Fin Maaß 2025-03-20 09:30:05 +01:00 committed by Benjamin Cabé
parent f874253166
commit 2260111cc6
1 changed files with 26 additions and 1 deletions
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27
drivers/i2c/i2c_litex_litei2c.c
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@ -30,9 +30,14 @@ struct i2c_litex_litei2c_config {
uint32_t bitrate;
};
struct i2c_litex_litei2c_data {
struct k_mutex mutex;
};
static int i2c_litex_configure(const struct device *dev, uint32_t dev_config)
{
const struct i2c_litex_litei2c_config *config = dev->config;
struct i2c_litex_litei2c_data *data = dev->data;
if (I2C_ADDR_10_BITS & dev_config) {
return -ENOTSUP;
@ -42,6 +47,8 @@ static int i2c_litex_configure(const struct device *dev, uint32_t dev_config)
return -ENOTSUP;
}
k_mutex_lock(&data->mutex, K_FOREVER);
/* Setup speed to use */
switch (I2C_SPEED_GET(dev_config)) {
case I2C_SPEED_STANDARD:
@ -54,9 +61,12 @@ static int i2c_litex_configure(const struct device *dev, uint32_t dev_config)
litex_write8(2, config->phy_speed_mode_addr);
break;
default:
k_mutex_unlock(&data->mutex);
return -ENOTSUP;
}
k_mutex_unlock(&data->mutex);
return 0;
}
@ -99,6 +109,7 @@ static int i2c_litex_transfer(const struct device *dev, struct i2c_msg *msgs, ui
uint16_t addr)
{
const struct i2c_litex_litei2c_config *config = dev->config;
struct i2c_litex_litei2c_data *data = dev->data;
uint32_t len_tx_buf = 0;
uint32_t len_rx_buf = 0;
uint8_t len_tx = 0;
@ -115,6 +126,8 @@ static int i2c_litex_transfer(const struct device *dev, struct i2c_msg *msgs, ui
int ret = 0;
k_mutex_lock(&data->mutex, K_FOREVER);
litex_write8(1, config->master_active_addr);
LOG_DBG("addr: 0x%x", addr);
@ -256,12 +269,17 @@ transfer_end:
litex_write8(0, config->master_active_addr);
k_mutex_unlock(&data->mutex);
return ret;
}
static int i2c_litex_recover_bus(const struct device *dev)
{
const struct i2c_litex_litei2c_config *config = dev->config;
struct i2c_litex_litei2c_data *data = dev->data;
k_mutex_lock(&data->mutex, K_FOREVER);
litex_write8(1, config->master_active_addr);
@ -281,14 +299,19 @@ static int i2c_litex_recover_bus(const struct device *dev)
litex_write8(0, config->master_active_addr);
k_mutex_unlock(&data->mutex);
return 0;
}
static int i2c_litex_init(const struct device *dev)
{
const struct i2c_litex_litei2c_config *config = dev->config;
struct i2c_litex_litei2c_data *data = dev->data;
int ret;
k_mutex_init(&data->mutex);
ret = i2c_litex_configure(dev, I2C_MODE_CONTROLLER | i2c_map_dt_bitrate(config->bitrate));
if (ret != 0) {
LOG_ERR("failed to configure I2C: %d", ret);
@ -310,6 +333,8 @@ static DEVICE_API(i2c, i2c_litex_litei2c_driver_api) = {
/* Device Instantiation */
#define I2C_LITEX_INIT(n) \
static struct i2c_litex_litei2c_data i2c_litex_litei2c_data_##n; \
\
static const struct i2c_litex_litei2c_config i2c_litex_litei2c_config_##n = { \
.phy_speed_mode_addr = DT_INST_REG_ADDR_BY_NAME(n, phy_speed_mode), \
.master_active_addr = DT_INST_REG_ADDR_BY_NAME(n, master_active), \
@ -320,7 +345,7 @@ static DEVICE_API(i2c, i2c_litex_litei2c_driver_api) = {
.bitrate = DT_INST_PROP(n, clock_frequency), \
}; \
\
I2C_DEVICE_DT_INST_DEFINE(n, i2c_litex_init, NULL, NULL, \
I2C_DEVICE_DT_INST_DEFINE(n, i2c_litex_init, NULL, &i2c_litex_litei2c_data_##n, \
&i2c_litex_litei2c_config_##n, POST_KERNEL, \
CONFIG_I2C_INIT_PRIORITY, &i2c_litex_litei2c_driver_api);