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can:mcux_flexcan driver errata #31730

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Merged
merged 1 commit into from
Feb 1, 2021
+10 −1
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can:mcux_flexcan driver errata #31730

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11 changes: 10 additions & 1 deletion drivers/can/can_mcux_flexcan.c
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,14 @@ LOG_MODULE_REGISTER(can_mcux_flexcan);
#error You must either set a sampling-point or timings (phase-seg* and prop-seg)
#endif

#if ((defined(FSL_FEATURE_FLEXCAN_HAS_ERRATA_5641) && FSL_FEATURE_FLEXCAN_HAS_ERRATA_5641) || \
(defined(FSL_FEATURE_FLEXCAN_HAS_ERRATA_5829) && FSL_FEATURE_FLEXCAN_HAS_ERRATA_5829))
/* the first valid MB should be occupied by ERRATA 5461 or 5829. */
#define RX_START_IDX 1
#else
#define RX_START_IDX 0
#endif

/*
* RX message buffers (filters) will take up the first N message
* buffers. The rest are available for TX use.
Expand Down Expand Up @@ -165,6 +173,7 @@ static int mcux_flexcan_set_mode(const struct device *dev, enum can_mode mode)
}

FLEXCAN_GetDefaultConfig(&flexcan_config);
flexcan_config.maxMbNum = FSL_FEATURE_FLEXCAN_HAS_MESSAGE_BUFFER_MAX_NUMBERn(0);
flexcan_config.clkSrc = config->clk_source;
flexcan_config.baudRate = clock_freq /
(1U + data->timing.prop_seg + data->timing.phase_seg1 +
Expand Down Expand Up @@ -370,7 +379,7 @@ static int mcux_flexcan_attach_isr(const struct device *dev,
k_mutex_lock(&data->rx_mutex, K_FOREVER);

/* Find and allocate RX message buffer */
for (i = 0; i < MCUX_FLEXCAN_MAX_RX; i++) {
for (i = RX_START_IDX; i < MCUX_FLEXCAN_MAX_RX; i++) {
if (!atomic_test_and_set_bit(data->rx_allocs, i)) {
alloc = i;
break;
Expand Down