diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 6c692568bdf5..b361c1bb3e43 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -281,7 +281,8 @@ static void fsl_lpspi_read_rx_fifo(struct fsl_lpspi_data *fsl_lpspi) fsl_lpspi->rx(fsl_lpspi); } -static void fsl_lpspi_set_cmd(struct fsl_lpspi_data *fsl_lpspi) +static void fsl_lpspi_set_cmd(struct fsl_lpspi_data *fsl_lpspi, + struct spi_device *spi) { u32 temp = 0; @@ -303,6 +304,13 @@ static void fsl_lpspi_set_cmd(struct fsl_lpspi_data *fsl_lpspi) temp |= TCR_CONTC; } } + + if (spi->mode & SPI_CPOL) + temp |= TCR_CPOL; + + if (spi->mode & SPI_CPHA) + temp |= TCR_CPHA; + writel(temp, fsl_lpspi->base + IMX7ULP_TCR); dev_dbg(fsl_lpspi->dev, "TCR=0x%x\n", temp); @@ -488,12 +496,45 @@ static int fsl_lpspi_setup_transfer(struct spi_controller *controller, fsl_lpspi->watermark = min(fsl_lpspi->txfifosize, t->len); + return fsl_lpspi_config(fsl_lpspi); +} + +static int fsl_lpspi_prepare_message(struct spi_controller *controller, + struct spi_message *msg) +{ + struct fsl_lpspi_data *fsl_lpspi = + spi_controller_get_devdata(controller); + struct spi_device *spi = msg->spi; + struct spi_transfer *t; + int ret; + + t = list_first_entry_or_null(&msg->transfers, struct spi_transfer, + transfer_list); + if (!t) + return 0; + + fsl_lpspi->is_first_byte = true; + fsl_lpspi->usedma = false; + ret = fsl_lpspi_setup_transfer(controller, spi, t); + if (fsl_lpspi_can_dma(controller, spi, t)) fsl_lpspi->usedma = true; else fsl_lpspi->usedma = false; - return fsl_lpspi_config(fsl_lpspi); + if (ret < 0) + return ret; + + fsl_lpspi_set_cmd(fsl_lpspi, spi); + + /* No IRQs */ + writel(0, fsl_lpspi->base + IMX7ULP_IER); + + /* Controller disable, clear FIFOs, clear status */ + writel(CR_RRF | CR_RTF, fsl_lpspi->base + IMX7ULP_CR); + writel(SR_CLEAR_MASK, fsl_lpspi->base + IMX7ULP_SR); + + return 0; } static int fsl_lpspi_target_abort(struct spi_controller *controller) @@ -753,14 +794,18 @@ static int fsl_lpspi_transfer_one(struct spi_controller *controller, spi_controller_get_devdata(controller); int ret; - fsl_lpspi->is_first_byte = true; + if (fsl_lpspi_can_dma(controller, spi, t)) + fsl_lpspi->usedma = true; + else + fsl_lpspi->usedma = false; + ret = fsl_lpspi_setup_transfer(controller, spi, t); if (ret < 0) return ret; t->effective_speed_hz = fsl_lpspi->config.effective_speed_hz; - fsl_lpspi_set_cmd(fsl_lpspi); + fsl_lpspi_set_cmd(fsl_lpspi, spi); fsl_lpspi->is_first_byte = false; if (fsl_lpspi->usedma) @@ -944,6 +989,7 @@ static int fsl_lpspi_probe(struct platform_device *pdev) } controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32); + controller->prepare_message = fsl_lpspi_prepare_message; controller->transfer_one = fsl_lpspi_transfer_one; controller->prepare_transfer_hardware = lpspi_prepare_xfer_hardware; controller->unprepare_transfer_hardware = lpspi_unprepare_xfer_hardware;