Merge tag 'spi-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/gi…

…t/broonie/spi

Pull spi updates from Mark Brown:
 "A fairly quiet release for the SPI subsystem:

   - Move to using IDR for allocating bus numbers

   - Modernisation of the ep93xx driver, removing a lot of open coding
     and using the framework more

   - The tools have been moved to use the standard tools build system
     and an install target added (there will be a fairly trivial
     conflict with tip resulting from the changes in the main tools
     Makefile)

   - A refactoring of the Qualcomm QUP driver which enables new variants
     to be supported

   - Explicit support for the Freescale i.MX53 and i.MX6 SPI, Renesas
     R-Car H3 and Rockchip RV1108 controllers"

* tag 'spi-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (71 commits)
  spi: spi-falcon: drop check of boot select
  spi: imx: fix use of native chip-selects with devicetree
  spi: pl022: constify amba_id
  spi: imx: fix little-endian build
  spi: omap: Allocate bus number from spi framework
  spi: Kernel coding style fixes
  spi: imx: dynamic burst length adjust for PIO mode
  spi: Pick spi bus number from Linux idr or spi alias
  spi: rockchip: configure CTRLR1 according to size and data frame
  spi: altera: Consolidate TX/RX data register access
  spi: altera: Switch to SPI core transfer queue management
  spi: rockchip: add compatible string for rv1108 spi
  spi: qup: fix 64-bit build warning
  spi: qup: hide warning for uninitialized variable
  spi: spi-ep93xx: use the default master transfer queueing mechanism
  spi: spi-ep93xx: remove private data 'current_msg'
  spi: spi-ep93xx: pass the spi_master pointer around
  spi: spi-ep93xx: absorb the interrupt enable/disable helpers
  spi: spi-ep93xx: add spi master prepare_transfer_hardware()
  spi: spi-ep93xx: use 32-bit read/write for all registers
  ...

Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt

@@ -9,6 +9,7 @@ Required properties:
   - "fsl,imx31-cspi" for SPI compatible with the one integrated on i.MX31
   - "fsl,imx35-cspi" for SPI compatible with the one integrated on i.MX35
   - "fsl,imx51-ecspi" for SPI compatible with the one integrated on i.MX51
+  - "fsl,imx53-ecspi" for SPI compatible with the one integrated on i.MX53 and later Soc
 - reg : Offset and length of the register set for the device
 - interrupts : Should contain CSPI/eCSPI interrupt
 - cs-gpios : Specifies the gpio pins to be used for chipselects.

Documentation/devicetree/bindings/spi/sh-msiof.txt

@@ -6,6 +6,7 @@ Required properties:
 			 "renesas,msiof-r8a7792" (R-Car V2H)
 			 "renesas,msiof-r8a7793" (R-Car M2-N)
 			 "renesas,msiof-r8a7794" (R-Car E2)
+			 "renesas,msiof-r8a7795" (R-Car H3)
 			 "renesas,msiof-r8a7796" (R-Car M3-W)
 			 "renesas,msiof-sh73a0" (SH-Mobile AG5)
 			 "renesas,sh-mobile-msiof" (generic SH-Mobile compatibile device)

Documentation/devicetree/bindings/spi/spi-rockchip.txt

@@ -6,6 +6,7 @@ and display controllers using the SPI communication interface.
 Required Properties:
 
 - compatible: should be one of the following.
+    "rockchip,rv1108-spi" for rv1108 SoCs.
     "rockchip,rk3036-spi" for rk3036 SoCS.
     "rockchip,rk3066-spi" for rk3066 SoCs.
     "rockchip,rk3188-spi" for rk3188 SoCs.

drivers/spi/Kconfig

@@ -55,7 +55,6 @@ comment "SPI Master Controller Drivers"
 
 config SPI_ALTERA
 	tristate "Altera SPI Controller"
-	select SPI_BITBANG
 	help
 	  This is the driver for the Altera SPI Controller.
 
@@ -518,8 +517,8 @@ config SPI_PPC4xx
 
 config SPI_PXA2XX
 	tristate "PXA2xx SSP SPI master"
-	depends on (ARCH_PXA || PCI || ACPI)
-	select PXA_SSP if ARCH_PXA
+	depends on (ARCH_PXA || ARCH_MMP || PCI || ACPI)
+	select PXA_SSP if ARCH_PXA || ARCH_MMP
 	help
 	  This enables using a PXA2xx or Sodaville SSP port as a SPI master
 	  controller. The driver can be configured to use any SSP port and

drivers/spi/spi-altera.c

@@ -18,7 +18,6 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/spi/spi.h>
-#include <linux/spi/spi_bitbang.h>
 #include <linux/io.h>
 #include <linux/of.h>
 
@@ -45,10 +44,6 @@
 #define ALTERA_SPI_CONTROL_SSO_MSK	0x400
 
 struct altera_spi {
-	/* bitbang has to be first */
-	struct spi_bitbang bitbang;
-	struct completion done;
-
 	void __iomem *base;
 	int irq;
 	int len;
@@ -66,59 +61,64 @@ static inline struct altera_spi *altera_spi_to_hw(struct spi_device *sdev)
 	return spi_master_get_devdata(sdev->master);
 }
 
-static void altera_spi_chipsel(struct spi_device *spi, int value)
+static void altera_spi_set_cs(struct spi_device *spi, bool is_high)
 {
 	struct altera_spi *hw = altera_spi_to_hw(spi);
 
-	if (spi->mode & SPI_CS_HIGH) {
-		switch (value) {
-		case BITBANG_CS_INACTIVE:
-			writel(1 << spi->chip_select,
-			       hw->base + ALTERA_SPI_SLAVE_SEL);
-			hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
-			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
-			break;
-
-		case BITBANG_CS_ACTIVE:
-			hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
-			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
-			writel(0, hw->base + ALTERA_SPI_SLAVE_SEL);
-			break;
-		}
+	if (is_high) {
+		hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
+		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+		writel(0, hw->base + ALTERA_SPI_SLAVE_SEL);
 	} else {
-		switch (value) {
-		case BITBANG_CS_INACTIVE:
-			hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
-			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
-			break;
+		writel(BIT(spi->chip_select), hw->base + ALTERA_SPI_SLAVE_SEL);
+		hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
+		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+	}
+}
+
+static void altera_spi_tx_word(struct altera_spi *hw)
+{
+	unsigned int txd = 0;
 
-		case BITBANG_CS_ACTIVE:
-			writel(1 << spi->chip_select,
-			       hw->base + ALTERA_SPI_SLAVE_SEL);
-			hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
-			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+	if (hw->tx) {
+		switch (hw->bytes_per_word) {
+		case 1:
+			txd = hw->tx[hw->count];
+			break;
+		case 2:
+			txd = (hw->tx[hw->count * 2]
+				| (hw->tx[hw->count * 2 + 1] << 8));
 			break;
 		}
 	}
+
+	writel(txd, hw->base + ALTERA_SPI_TXDATA);
 }
 
-static inline unsigned int hw_txbyte(struct altera_spi *hw, int count)
+static void altera_spi_rx_word(struct altera_spi *hw)
 {
-	if (hw->tx) {
+	unsigned int rxd;
+
+	rxd = readl(hw->base + ALTERA_SPI_RXDATA);
+	if (hw->rx) {
 		switch (hw->bytes_per_word) {
 		case 1:
-			return hw->tx[count];
+			hw->rx[hw->count] = rxd;
+			break;
 		case 2:
-			return (hw->tx[count * 2]
-				| (hw->tx[count * 2 + 1] << 8));
+			hw->rx[hw->count * 2] = rxd;
+			hw->rx[hw->count * 2 + 1] = rxd >> 8;
+			break;
 		}
 	}
-	return 0;
+
+	hw->count++;
 }
 
-static int altera_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
+static int altera_spi_txrx(struct spi_master *master,
+	struct spi_device *spi, struct spi_transfer *t)
 {
-	struct altera_spi *hw = altera_spi_to_hw(spi);
+	struct altera_spi *hw = spi_master_get_devdata(master);
 
 	hw->tx = t->tx_buf;
 	hw->rx = t->rx_buf;
@@ -132,67 +132,39 @@ static int altera_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
 		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
 
 		/* send the first byte */
-		writel(hw_txbyte(hw, 0), hw->base + ALTERA_SPI_TXDATA);
-
-		wait_for_completion(&hw->done);
-		/* disable receive interrupt */
-		hw->imr &= ~ALTERA_SPI_CONTROL_IRRDY_MSK;
-		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+		altera_spi_tx_word(hw);
 	} else {
 		while (hw->count < hw->len) {
-			unsigned int rxd;
-
-			writel(hw_txbyte(hw, hw->count),
-			       hw->base + ALTERA_SPI_TXDATA);
+			altera_spi_tx_word(hw);
 
 			while (!(readl(hw->base + ALTERA_SPI_STATUS) &
 				 ALTERA_SPI_STATUS_RRDY_MSK))
 				cpu_relax();
 
-			rxd = readl(hw->base + ALTERA_SPI_RXDATA);
-			if (hw->rx) {
-				switch (hw->bytes_per_word) {
-				case 1:
-					hw->rx[hw->count] = rxd;
-					break;
-				case 2:
-					hw->rx[hw->count * 2] = rxd;
-					hw->rx[hw->count * 2 + 1] = rxd >> 8;
-					break;
-				}
-			}
-
-			hw->count++;
+			altera_spi_rx_word(hw);
 		}
+		spi_finalize_current_transfer(master);
 	}
 
-	return hw->count * hw->bytes_per_word;
+	return t->len;
 }
 
 static irqreturn_t altera_spi_irq(int irq, void *dev)
 {
-	struct altera_spi *hw = dev;
-	unsigned int rxd;
+	struct spi_master *master = dev;
+	struct altera_spi *hw = spi_master_get_devdata(master);
 
-	rxd = readl(hw->base + ALTERA_SPI_RXDATA);
-	if (hw->rx) {
-		switch (hw->bytes_per_word) {
-		case 1:
-			hw->rx[hw->count] = rxd;
-			break;
-		case 2:
-			hw->rx[hw->count * 2] = rxd;
-			hw->rx[hw->count * 2 + 1] = rxd >> 8;
-			break;
-		}
-	}
+	altera_spi_rx_word(hw);
 
-	hw->count++;
+	if (hw->count < hw->len) {
+		altera_spi_tx_word(hw);
+	} else {
+		/* disable receive interrupt */
+		hw->imr &= ~ALTERA_SPI_CONTROL_IRRDY_MSK;
+		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
 
-	if (hw->count < hw->len)
-		writel(hw_txbyte(hw, hw->count), hw->base + ALTERA_SPI_TXDATA);
-	else
-		complete(&hw->done);
+		spi_finalize_current_transfer(master);
+	}
 
 	return IRQ_HANDLED;
 }
@@ -214,14 +186,10 @@ static int altera_spi_probe(struct platform_device *pdev)
 	master->mode_bits = SPI_CS_HIGH;
 	master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 16);
 	master->dev.of_node = pdev->dev.of_node;
+	master->transfer_one = altera_spi_txrx;
+	master->set_cs = altera_spi_set_cs;
 
 	hw = spi_master_get_devdata(master);
-	platform_set_drvdata(pdev, hw);
-
-	/* setup the state for the bitbang driver */
-	hw->bitbang.master = master;
-	hw->bitbang.chipselect = altera_spi_chipsel;
-	hw->bitbang.txrx_bufs = altera_spi_txrx;
 
 	/* find and map our resources */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -239,15 +207,13 @@ static int altera_spi_probe(struct platform_device *pdev)
 	/* irq is optional */
 	hw->irq = platform_get_irq(pdev, 0);
 	if (hw->irq >= 0) {
-		init_completion(&hw->done);
 		err = devm_request_irq(&pdev->dev, hw->irq, altera_spi_irq, 0,
-				       pdev->name, hw);
+				       pdev->name, master);
 		if (err)
 			goto exit;
 	}
 
-	/* register our spi controller */
-	err = spi_bitbang_start(&hw->bitbang);
+	err = devm_spi_register_master(&pdev->dev, master);
 	if (err)
 		goto exit;
 	dev_info(&pdev->dev, "base %p, irq %d\n", hw->base, hw->irq);
@@ -258,16 +224,6 @@ static int altera_spi_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int altera_spi_remove(struct platform_device *dev)
-{
-	struct altera_spi *hw = platform_get_drvdata(dev);
-	struct spi_master *master = hw->bitbang.master;
-
-	spi_bitbang_stop(&hw->bitbang);
-	spi_master_put(master);
-	return 0;
-}
-
 #ifdef CONFIG_OF
 static const struct of_device_id altera_spi_match[] = {
 	{ .compatible = "ALTR,spi-1.0", },
@@ -279,7 +235,6 @@ MODULE_DEVICE_TABLE(of, altera_spi_match);
 
 static struct platform_driver altera_spi_driver = {
 	.probe = altera_spi_probe,
-	.remove = altera_spi_remove,
 	.driver = {
 		.name = DRV_NAME,
 		.pm = NULL,

drivers/spi/spi-ath79.c

@@ -39,15 +39,15 @@ struct ath79_spi {
 	u32			reg_ctrl;
 	void __iomem		*base;
 	struct clk		*clk;
-	unsigned		rrw_delay;
+	unsigned int		rrw_delay;
 };
 
-static inline u32 ath79_spi_rr(struct ath79_spi *sp, unsigned reg)
+static inline u32 ath79_spi_rr(struct ath79_spi *sp, unsigned int reg)
 {
 	return ioread32(sp->base + reg);
 }
 
-static inline void ath79_spi_wr(struct ath79_spi *sp, unsigned reg, u32 val)
+static inline void ath79_spi_wr(struct ath79_spi *sp, unsigned int reg, u32 val)
 {
 	iowrite32(val, sp->base + reg);
 }
@@ -57,7 +57,7 @@ static inline struct ath79_spi *ath79_spidev_to_sp(struct spi_device *spi)
 	return spi_master_get_devdata(spi->master);
 }
 
-static inline void ath79_spi_delay(struct ath79_spi *sp, unsigned nsecs)
+static inline void ath79_spi_delay(struct ath79_spi *sp, unsigned int nsecs)
 {
 	if (nsecs > sp->rrw_delay)
 		ndelay(nsecs - sp->rrw_delay);
@@ -148,9 +148,8 @@ static int ath79_spi_setup_cs(struct spi_device *spi)
 
 static void ath79_spi_cleanup_cs(struct spi_device *spi)
 {
-	if (gpio_is_valid(spi->cs_gpio)) {
+	if (gpio_is_valid(spi->cs_gpio))
 		gpio_free(spi->cs_gpio);
-	}
 }
 
 static int ath79_spi_setup(struct spi_device *spi)
@@ -176,7 +175,7 @@ static void ath79_spi_cleanup(struct spi_device *spi)
 	spi_bitbang_cleanup(spi);
 }
 
-static u32 ath79_spi_txrx_mode0(struct spi_device *spi, unsigned nsecs,
+static u32 ath79_spi_txrx_mode0(struct spi_device *spi, unsigned int nsecs,
 			       u32 word, u8 bits)
 {
 	struct ath79_spi *sp = ath79_spidev_to_sp(spi);