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| author | Mark Brown <broonie@kernel.org> | 2018-06-27 14:26:12 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-06-27 14:26:12 +0100 |
| commit | 1ce34dea91ae86bb18f493f72292df1bf6f66df7 (patch) | |
| tree | a9655fcdd65c2068cc04ffe3562a9c710dfa2145 /drivers/spi/spi-cadence.c | |
| parent | b0e4376b34cab1cbbd7ed399a1df787890336837 (diff) | |
| parent | a26899e0baa4de07caf97f5e4d7298240e98fd0e (diff) | |
Merge tag 'v4.14.52' into linux-linaro-lsk-v4.14lsk-v4.14-18.06
This is the 4.14.52 stable release
Diffstat (limited to 'drivers/spi/spi-cadence.c')
| -rw-r--r-- | drivers/spi/spi-cadence.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/spi/spi-cadence.c b/drivers/spi/spi-cadence.c index 5c9516ae4942..4a001634023e 100644 --- a/drivers/spi/spi-cadence.c +++ b/drivers/spi/spi-cadence.c @@ -313,6 +313,14 @@ static void cdns_spi_fill_tx_fifo(struct cdns_spi *xspi) while ((trans_cnt < CDNS_SPI_FIFO_DEPTH) && (xspi->tx_bytes > 0)) { + + /* When xspi in busy condition, bytes may send failed, + * then spi control did't work thoroughly, add one byte delay + */ + if (cdns_spi_read(xspi, CDNS_SPI_ISR) & + CDNS_SPI_IXR_TXFULL) + usleep_range(10, 20); + if (xspi->txbuf) cdns_spi_write(xspi, CDNS_SPI_TXD, *xspi->txbuf++); else |