spi: Fixes for v3.15

A few driver specific fixes here:
 
  - SH HSPI was dealing with its clocks incorrectly which meant it didn't
    work on some SoCs, fixing this also requires a small fix to one of
    the SoC clock trees to avoid breaking existing users.
  - The SiRF driver appears to have had several quality problems, it's
    fairly new and not widely used so this isn't too worrying.
  - A brute force fix for excessive locking in the Atmel driver, it needs
    further investigation but this deals with the immediate issue.
  - A build fix for the Blackfin driver.
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Merge tag 'spi-v3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A few driver specific fixes here:

   - SH HSPI was dealing with its clocks incorrectly which meant it
     didn't work on some SoCs, fixing this also requires a small fix to
     one of the SoC clock trees to avoid breaking existing users.
   - The SiRF driver appears to have had several quality problems, it's
     fairly new and not widely used so this isn't too worrying.
   - A brute force fix for excessive locking in the Atmel driver, it
     needs further investigation but this deals with the immediate
     issue.
   - A build fix for the Blackfin driver"

* tag 'spi-v3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: atmel: Fix scheduling while atomic bug
  spi: sh-hspi: Do not specifically request shyway_clk clock
  ARM: shmobile: r8a7778: Use clks as MSTP007 parent
  spi: sirf: make GPIO chipselect function work well
  spi: sirf: set SPI controller in RISC IO chipselect mode
  spi: sirf: correct TXFIFO empty interrupt status bit
  spi: bfin5xx: fix build error

arch/arm/mach-shmobile/clock-r8a7778.c

@@ -170,7 +170,7 @@ static struct clk mstp_clks[MSTP_NR] = {
 	[MSTP010] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 10, 0), /* SSI2 */
 	[MSTP009] = SH_CLK_MSTP32(&p_clk, MSTPCR0,  9, 0), /* SSI3 */
 	[MSTP008] = SH_CLK_MSTP32(&p_clk, MSTPCR0,  8, 0), /* SRU */
-	[MSTP007] = SH_CLK_MSTP32(&p_clk, MSTPCR0,  7, 0), /* HSPI */
+	[MSTP007] = SH_CLK_MSTP32(&s_clk, MSTPCR0,  7, 0), /* HSPI */
 };
 
 static struct clk_lookup lookups[] = {

drivers/spi/spi-atmel.c

@@ -1115,8 +1115,11 @@ static int atmel_spi_one_transfer(struct spi_master *master,
 			atmel_spi_next_xfer_pio(master, xfer);
 		}
 
+		/* interrupts are disabled, so free the lock for schedule */
+		atmel_spi_unlock(as);
 		ret = wait_for_completion_timeout(&as->xfer_completion,
 							SPI_DMA_TIMEOUT);
+		atmel_spi_lock(as);
 		if (WARN_ON(ret == 0)) {
 			dev_err(&spi->dev,
 				"spi trasfer timeout, err %d\n", ret);

drivers/spi/spi-bfin5xx.c

@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/device.h>
+#include <linux/gpio.h>
 #include <linux/slab.h>
 #include <linux/io.h>
 #include <linux/ioport.h>

drivers/spi/spi-sh-hspi.c

@@ -244,9 +244,9 @@ static int hspi_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	clk = clk_get(NULL, "shyway_clk");
+	clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(clk)) {
-		dev_err(&pdev->dev, "shyway_clk is required\n");
+		dev_err(&pdev->dev, "couldn't get clock\n");
 		ret = -EINVAL;
 		goto error0;
 	}

drivers/spi/spi-sirf.c

@@ -287,8 +287,8 @@ static irqreturn_t spi_sirfsoc_irq(int irq, void *dev_id)
 				sspi->left_rx_word)
 			sspi->rx_word(sspi);
 
-	if (spi_stat & (SIRFSOC_SPI_FIFO_EMPTY
+	if (spi_stat & (SIRFSOC_SPI_TXFIFO_EMPTY |
-			| SIRFSOC_SPI_TXFIFO_THD_REACH))
+			SIRFSOC_SPI_TXFIFO_THD_REACH))
 		while (!((readl(sspi->base + SIRFSOC_SPI_TXFIFO_STATUS)
 				& SIRFSOC_SPI_FIFO_FULL)) &&
 				sspi->left_tx_word)
@@ -470,7 +470,16 @@ static void spi_sirfsoc_chipselect(struct spi_device *spi, int value)
 		writel(regval, sspi->base + SIRFSOC_SPI_CTRL);
 	} else {
 		int gpio = sspi->chipselect[spi->chip_select];
-		gpio_direction_output(gpio, spi->mode & SPI_CS_HIGH ? 0 : 1);
+		switch (value) {
+		case BITBANG_CS_ACTIVE:
+			gpio_direction_output(gpio,
+					spi->mode & SPI_CS_HIGH ? 1 : 0);
+			break;
+		case BITBANG_CS_INACTIVE:
+			gpio_direction_output(gpio,
+					spi->mode & SPI_CS_HIGH ? 0 : 1);
+			break;
+		}
 	}
 }
 
@@ -559,6 +568,11 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
 		regval &= ~SIRFSOC_SPI_CMD_MODE;
 		sspi->tx_by_cmd = false;
 	}
+	/*
+	 * set spi controller in RISC chipselect mode, we are controlling CS by
+	 * software BITBANG_CS_ACTIVE and BITBANG_CS_INACTIVE.
+	 */
+	regval |= SIRFSOC_SPI_CS_IO_MODE;
 	writel(regval, sspi->base + SIRFSOC_SPI_CTRL);
 
 	if (IS_DMA_VALID(t)) {