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Fixes mimxrt10xx: Wrong I2C transfer status #13819 #27896

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Merged
merged 1 commit into from
Sep 3, 2020
Merged

Fixes mimxrt10xx: Wrong I2C transfer status #13819 #27896

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12 changes: 11 additions & 1 deletion drivers/i2c/i2c_mcux_lpi2c.c
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,10 @@
LOG_MODULE_REGISTER(mcux_lpi2c);

#include "i2c-priv.h"
/* Wait for the duration of 12 bits to detect a NAK after a bus
* address scan. (10 appears sufficient, 20% safety factor.)
*/
#define SCAN_DELAY_US(baudrate) (12 * USEC_PER_SEC / baudrate)

struct mcux_lpi2c_config {
LPI2C_Type *base;
Expand Down Expand Up @@ -161,7 +165,13 @@ static int mcux_lpi2c_transfer(const struct device *dev, struct i2c_msg *msgs,
LPI2C_MasterTransferAbort(base, &data->handle);
return -EIO;
}

if (msgs->len == 0) {
k_busy_wait(SCAN_DELAY_US(config->bitrate));
if (0 != (base->MSR & LPI2C_MSR_NDF_MASK)) {
LPI2C_MasterTransferAbort(base, &data->handle);
return -EIO;
}
}
/* Move to the next message */
msgs++;
}
Expand Down