Merge tag 'spi-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "There's quite a lot of small driver specific fixes and enhancements in
  this release but the main activity has been around the loopback and
  spidev test drivers which is good to see as it should hopefully help
  improve the quality of all the drivers as people start to make use of
  the new code:

   - Additional tests in the loopback test driver for vmalloc()
     compatibility and around delays together with fixes for existing
     tests.

   - Support for testing continuous data transfer for use in soak
     testing.

   - Device property support for board info platforms.

   - Support for registering empty sets of devices via board info
     (useful when writing code to enumerate hardware automatically)"

* tag 'spi-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (52 commits)
  spi: cadence: Allow for GPIO pins to be used as chipselects
  spi-imx: Implements handling of the SPI_READY mode flag.
  spi: tegra: fix spelling mistake: "trasfer" -> "transfer"
  spi: spi-ti-qspi: Use bounce buffer if read buffer is not DMA'ble
  spi: Add can_dma like interface for spi_flash_read
  spi: dw: Disable clock after unregistering the host
  spi: double time out tolerance
  spi: atmel: add deepest PM support to SAMA5D2
  spi: atmel: factorize reusable code for SPI controller init
  spi: orion: add LSB support
  spi: pl022: don't use uninitialized variable
  spi: loopback-test: fix spelling mistake: "minimam" -> "minimum"
  spi: dynamycally allocated message initialization
  spi: spi-ti-qspi: Remove unused dma_dev variable
  spi: omap2-mcspi: poll OMAP2_MCSPI_CHSTAT_RXS for PIO transfer
  spi: spi-ti-qspi: Use dma_engine wrapper for dma memcpy call
  spi: spidev_test: add option to continuously transfer data
  spi: loopback-test: fix potential integer overflow on multiple
  spi: sun6i: update max transfer size reported
  spi: pl022: Document property values
  ...

1 files changed, 18 insertions, 2 deletions

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 9a7c62f471dc..b402530a7a9a 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -95,6 +95,7 @@ struct spi_imx_data {
 	unsigned int spi_bus_clk;
 
 	unsigned int bytes_per_word;
+	unsigned int spi_drctl;
 
 	unsigned int count;
 	void (*tx)(struct spi_imx_data *);
@@ -246,6 +247,7 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 #define MX51_ECSPI_CTRL_XCH		(1 <<  2)
 #define MX51_ECSPI_CTRL_SMC		(1 << 3)
 #define MX51_ECSPI_CTRL_MODE_MASK	(0xf << 4)
+#define MX51_ECSPI_CTRL_DRCTL(drctl)	((drctl) << 16)
 #define MX51_ECSPI_CTRL_POSTDIV_OFFSET	8
 #define MX51_ECSPI_CTRL_PREDIV_OFFSET	12
 #define MX51_ECSPI_CTRL_CS(cs)		((cs) << 18)
@@ -355,6 +357,12 @@ static int mx51_ecspi_config(struct spi_device *spi,
 	 */
 	ctrl |= MX51_ECSPI_CTRL_MODE_MASK;
 
+	/*
+	 * Enable SPI_RDY handling (falling edge/level triggered).
+	 */
+	if (spi->mode & SPI_READY)
+		ctrl |= MX51_ECSPI_CTRL_DRCTL(spi_imx->spi_drctl);
+
 	/* set clock speed */
 	ctrl |= mx51_ecspi_clkdiv(spi_imx, config->speed_hz, &clk);
 	spi_imx->spi_bus_clk = clk;
@@ -1173,7 +1181,7 @@ static int spi_imx_probe(struct platform_device *pdev)
 	struct spi_master *master;
 	struct spi_imx_data *spi_imx;
 	struct resource *res;
-	int i, ret, irq;
+	int i, ret, irq, spi_drctl;
 
 	if (!np && !mxc_platform_info) {
 		dev_err(&pdev->dev, "can't get the platform data\n");
@@ -1181,6 +1189,12 @@ static int spi_imx_probe(struct platform_device *pdev)
 	}
 
 	master = spi_alloc_master(&pdev->dev, sizeof(struct spi_imx_data));
+	ret = of_property_read_u32(np, "fsl,spi-rdy-drctl", &spi_drctl);
+	if ((ret < 0) || (spi_drctl >= 0x3)) {
+		/* '11' is reserved */
+		spi_drctl = 0;
+	}
+
 	if (!master)
 		return -ENOMEM;
 
@@ -1216,7 +1230,9 @@ static int spi_imx_probe(struct platform_device *pdev)
 	spi_imx->bitbang.master->unprepare_message = spi_imx_unprepare_message;
 	spi_imx->bitbang.master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
 	if (is_imx35_cspi(spi_imx) || is_imx51_ecspi(spi_imx))
-		spi_imx->bitbang.master->mode_bits |= SPI_LOOP;
+		spi_imx->bitbang.master->mode_bits |= SPI_LOOP | SPI_READY;
+
+	spi_imx->spi_drctl = spi_drctl;
 
 	init_completion(&spi_imx->xfer_done);