Merge tag 'spi-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "Lots of stuff going on in the core for SPI this time around, the two
  big changes both being around time in different forms:

   - A rework of delay times from Alexandru Ardelean which makes the
     ways in which they are specified more consistent between drivers so
     that what's available to clients is less dependent on the hardware
     implementation.

   - Support for PTP timestamping of transfers from Vladimir Oltean,
     useful for use with precision clocks with SPI control interfaces.

   - Big cleanups for the Atmel, PXA2xx and Zynq QSPI drivers"

* tag 'spi-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (119 commits)
  dt-bindings: spi: Convert stm32 QSPI bindings to json-schema
  spi: pic32: Retire dma_request_slave_channel_compat()
  spi: Fix Kconfig indentation
  spi: mediatek: add SPI_CS_HIGH support
  spi: st-ssc4: add missed pm_runtime_disable
  spi: tegra20-slink: add missed clk_unprepare
  spi: tegra20-slink: Use dma_request_chan() directly for channel request
  spi: tegra114: Use dma_request_chan() directly for channel request
  spi: s3c64xx: Use dma_request_chan() directly for channel request
  spi: qup: Use dma_request_chan() directly for channel request
  spi: pl022: Use dma_request_chan() directly for channel request
  spi: imx: Use dma_request_chan() directly for channel request
  spi: fsl-lpspi: Use dma_request_chan() directly for channel request
  spi: atmel: Use dma_request_chan() directly for channel request
  spi: at91-usart: Use dma_request_chan() directly for channel request
  spi: fsl-cpm: Correct the free:ing
  spi: Fix regression to return zero on success instead of positive value
  spi: pxa2xx: Add missed security checks
  spi: nxp-fspi: Use devm API to fix missed unregistration of controller
  spi: omap2-mcspi: Remove redundant checks
  ...

1 files changed, 40 insertions, 3 deletions

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index bec758e978fb..442cff71a0d2 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -129,6 +129,7 @@ enum dspi_trans_mode {
 struct fsl_dspi_devtype_data {
 	enum dspi_trans_mode	trans_mode;
 	u8			max_clock_factor;
+	bool			ptp_sts_supported;
 	bool			xspi_mode;
 };
 
@@ -140,12 +141,14 @@ static const struct fsl_dspi_devtype_data vf610_data = {
 static const struct fsl_dspi_devtype_data ls1021a_v1_data = {
 	.trans_mode		= DSPI_TCFQ_MODE,
 	.max_clock_factor	= 8,
+	.ptp_sts_supported	= true,
 	.xspi_mode		= true,
 };
 
 static const struct fsl_dspi_devtype_data ls2085a_data = {
 	.trans_mode		= DSPI_TCFQ_MODE,
 	.max_clock_factor	= 8,
+	.ptp_sts_supported	= true,
 };
 
 static const struct fsl_dspi_devtype_data coldfire_data = {
@@ -654,6 +657,9 @@ static int dspi_rxtx(struct fsl_dspi *dspi)
 	u16 spi_tcnt;
 	u32 spi_tcr;
 
+	spi_take_timestamp_post(dspi->ctlr, dspi->cur_transfer,
+				dspi->tx - dspi->bytes_per_word, !dspi->irq);
+
 	/* Get transfer counter (in number of SPI transfers). It was
 	 * reset to 0 when transfer(s) were started.
 	 */
@@ -672,6 +678,9 @@ static int dspi_rxtx(struct fsl_dspi *dspi)
 		/* Success! */
 		return 0;
 
+	spi_take_timestamp_pre(dspi->ctlr, dspi->cur_transfer,
+			       dspi->tx, !dspi->irq);
+
 	if (trans_mode == DSPI_EOQ_MODE)
 		dspi_eoq_write(dspi);
 	else if (trans_mode == DSPI_TCFQ_MODE)
@@ -707,7 +716,7 @@ static irqreturn_t dspi_interrupt(int irq, void *dev_id)
 	regmap_read(dspi->regmap, SPI_SR, &spi_sr);
 	regmap_write(dspi->regmap, SPI_SR, spi_sr);
 
-	if (!(spi_sr & (SPI_SR_EOQF | SPI_SR_TCFQF)))
+	if (!(spi_sr & SPI_SR_EOQF))
 		return IRQ_NONE;
 
 	if (dspi_rxtx(dspi) == 0) {
@@ -779,6 +788,9 @@ static int dspi_transfer_one_message(struct spi_controller *ctlr,
 				     SPI_FRAME_EBITS(transfer->bits_per_word) |
 				     SPI_CTARE_DTCP(1));
 
+		spi_take_timestamp_pre(dspi->ctlr, dspi->cur_transfer,
+				       dspi->tx, !dspi->irq);
+
 		trans_mode = dspi->devtype_data->trans_mode;
 		switch (trans_mode) {
 		case DSPI_EOQ_MODE:
@@ -815,8 +827,7 @@ static int dspi_transfer_one_message(struct spi_controller *ctlr,
 			dev_err(&dspi->pdev->dev,
 				"Waiting for transfer to complete failed!\n");
 
-		if (transfer->delay_usecs)
-			udelay(transfer->delay_usecs);
+		spi_transfer_delay_exec(transfer);
 	}
 
 out:
@@ -1006,6 +1017,25 @@ static void dspi_init(struct fsl_dspi *dspi)
 			     SPI_CTARE_FMSZE(0) | SPI_CTARE_DTCP(1));
 }
 
+static int dspi_slave_abort(struct spi_master *master)
+{
+	struct fsl_dspi *dspi = spi_master_get_devdata(master);
+
+	/*
+	 * Terminate all pending DMA transactions for the SPI working
+	 * in SLAVE mode.
+	 */
+	dmaengine_terminate_sync(dspi->dma->chan_rx);
+	dmaengine_terminate_sync(dspi->dma->chan_tx);
+
+	/* Clear the internal DSPI RX and TX FIFO buffers */
+	regmap_update_bits(dspi->regmap, SPI_MCR,
+			   SPI_MCR_CLR_TXF | SPI_MCR_CLR_RXF,
+			   SPI_MCR_CLR_TXF | SPI_MCR_CLR_RXF);
+
+	return 0;
+}
+
 static int dspi_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
@@ -1030,6 +1060,7 @@ static int dspi_probe(struct platform_device *pdev)
 	ctlr->dev.of_node = pdev->dev.of_node;
 
 	ctlr->cleanup = dspi_cleanup;
+	ctlr->slave_abort = dspi_slave_abort;
 	ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
 
 	pdata = dev_get_platdata(&pdev->dev);
@@ -1114,6 +1145,9 @@ static int dspi_probe(struct platform_device *pdev)
 
 	dspi_init(dspi);
 
+	if (dspi->devtype_data->trans_mode == DSPI_TCFQ_MODE)
+		goto poll_mode;
+
 	dspi->irq = platform_get_irq(pdev, 0);
 	if (dspi->irq <= 0) {
 		dev_info(&pdev->dev,
@@ -1132,6 +1166,7 @@ static int dspi_probe(struct platform_device *pdev)
 	init_waitqueue_head(&dspi->waitq);
 
 poll_mode:
+
 	if (dspi->devtype_data->trans_mode == DSPI_DMA_MODE) {
 		ret = dspi_request_dma(dspi, res->start);
 		if (ret < 0) {
@@ -1143,6 +1178,8 @@ poll_mode:
 	ctlr->max_speed_hz =
 		clk_get_rate(dspi->clk) / dspi->devtype_data->max_clock_factor;
 
+	ctlr->ptp_sts_supported = dspi->devtype_data->ptp_sts_supported;
+
 	platform_set_drvdata(pdev, ctlr);
 
 	ret = spi_register_controller(ctlr);