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i2c: stm32: add DMA callback stubs to avoid nullptr calls in ISR context

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Add stub functions for the I2C DMA callbacks, which are invoked
during or upon completion of DMA-based I2C transactions. Without
these, NULL pointer calls occur on DMA transfer complete or error
events, leading to faults within ISR context.

Signed-off-by: Simon Gilbert <srdgilbert@gmail.com>
This commit is contained in:
Simon Gilbert 2025-03-28 00:29:08 +00:00 • committed by Benjamin Cabé
commit 5c04df9127
1 changed files with 27 additions and 0 deletions
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27
drivers/i2c/i2c_ll_stm32.c
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@ -595,6 +595,32 @@ static void i2c_stm32_irq_config_func_##index(const struct device *dev) \
(DT_INST_DMAS_CELL_BY_NAME(index, dir, channel)), (-1)),\
},
void i2c_stm32_dma_tx_cb(const struct device *dma_dev, void *user_data,
uint32_t channel, int status)
{
ARG_UNUSED(dma_dev);
ARG_UNUSED(user_data);
ARG_UNUSED(channel);
/* log DMA TX error */
if (status != 0) {
LOG_ERR("DMA error %d", status);
}
}
void i2c_stm32_dma_rx_cb(const struct device *dma_dev, void *user_data,
uint32_t channel, int status)
{
ARG_UNUSED(dma_dev);
ARG_UNUSED(user_data);
ARG_UNUSED(channel);
/* log DMA RX error */
if (status != 0) {
LOG_ERR("DMA error %d", status);
}
}
#define I2C_DMA_DATA_INIT(index, dir, src, dest) \
.dma_##dir##_cfg = { \
.dma_slot = STM32_DMA_SLOT(index, dir, slot), \
@ -610,6 +636,7 @@ static void i2c_stm32_irq_config_func_##index(const struct device *dev) \
STM32_DMA_CHANNEL_CONFIG(index, dir)), \
.source_burst_length = 1, \
.dest_burst_length = 1, \
.dma_callback = i2c_stm32_dma_##dir##_cb, \
}, \
#else