Merge branch 'next/devel-samsung-spi' of...

Merge branch 'next/devel-samsung-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/spi

From Kukjin Kim <kgene.kim@samsung.com>:
You may think that 'since this is including only samsung spi stuff,
so this should be sent to upstream via spi tree', yeah right. But in
this time, would be helpful to us if they could be sent via arm-soc,
samsung tree for avoiding useless conflicts. Because samsung-dt-spi
branch touches the same driver and it is already in arm-soc tree.

* 'next/devel-samsung-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  spi/s3c64xx: Expand S3C64XX_SPI_{DE,}ACT macros at call sites
  spi/s3c64xx: Convert to devm_request_and_ioremap()
  spi/s3c64xx: Put the /CS GPIO into output mode
  spi/s3c64xx: Fix handling of errors in gpio_request()
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/spi/spi-s3c64xx.c

@@ -79,11 +79,6 @@
 #define S3C64XX_SPI_SLAVE_AUTO			(1<<1)
 #define S3C64XX_SPI_SLAVE_SIG_INACT		(1<<0)
 
-#define S3C64XX_SPI_ACT(c) writel(0, (c)->regs + S3C64XX_SPI_SLAVE_SEL)
-
-#define S3C64XX_SPI_DEACT(c) writel(S3C64XX_SPI_SLAVE_SIG_INACT, \
-					(c)->regs + S3C64XX_SPI_SLAVE_SEL)
-
 #define S3C64XX_SPI_INT_TRAILING_EN		(1<<6)
 #define S3C64XX_SPI_INT_RX_OVERRUN_EN		(1<<5)
 #define S3C64XX_SPI_INT_RX_UNDERRUN_EN		(1<<4)
@@ -737,14 +732,15 @@ static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
 		enable_cs(sdd, spi);
 
 		/* Start the signals */
-		S3C64XX_SPI_ACT(sdd);
+		writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 
 		spin_unlock_irqrestore(&sdd->lock, flags);
 
 		status = wait_for_xfer(sdd, xfer, use_dma);
 
 		/* Quiese the signals */
-		S3C64XX_SPI_DEACT(sdd);
+		writel(S3C64XX_SPI_SLAVE_SIG_INACT,
+		       sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 
 		if (status) {
 			dev_err(&spi->dev, "I/O Error: "
@@ -894,11 +890,12 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
 	}
 
 	if (!spi_get_ctldata(spi)) {
-		err = gpio_request(cs->line, dev_name(&spi->dev));
+		err = gpio_request_one(cs->line, GPIOF_OUT_INIT_HIGH,
+				       dev_name(&spi->dev));
 		if (err) {
-			dev_err(&spi->dev, "request for slave select gpio "
-					"line [%d] failed\n", cs->line);
-			err = -EBUSY;
+			dev_err(&spi->dev,
+				"Failed to get /CS gpio [%d]: %d\n",
+				cs->line, err);
 			goto err_gpio_req;
 		}
 		spi_set_ctldata(spi, cs);
@@ -1031,7 +1028,7 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel)
 
 	sdd->cur_speed = 0;
 
-	S3C64XX_SPI_DEACT(sdd);
+	writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 
 	/* Disable Interrupts - we use Polling if not DMA mode */
 	writel(0, regs + S3C64XX_SPI_INT_EN);
@@ -1116,7 +1113,8 @@ static int s3c64xx_spi_parse_dt_gpio(struct s3c64xx_spi_driver_data *sdd)
 
 		ret = gpio_request(gpio, "spi-bus");
 		if (ret) {
-			dev_err(dev, "gpio [%d] request failed\n", gpio);
+			dev_err(dev, "gpio [%d] request failed: %d\n",
+				gpio, ret);
 			goto free_gpio;
 		}
 	}
@@ -1278,14 +1276,7 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
 	/* the spi->mode bits understood by this driver: */
 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
 
-	if (request_mem_region(mem_res->start,
-			resource_size(mem_res), pdev->name) == NULL) {
-		dev_err(&pdev->dev, "Req mem region failed\n");
-		ret = -ENXIO;
-		goto err0;
-	}
-
-	sdd->regs = ioremap(mem_res->start, resource_size(mem_res));
+	sdd->regs = devm_request_and_ioremap(&pdev->dev, mem_res);
 	if (sdd->regs == NULL) {
 		dev_err(&pdev->dev, "Unable to remap IO\n");
 		ret = -ENXIO;
@@ -1379,9 +1370,7 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
 	if (!sdd->cntrlr_info->cfg_gpio && pdev->dev.of_node)
 		s3c64xx_spi_dt_gpio_free(sdd);
 err2:
-	iounmap((void *) sdd->regs);
 err1:
-	release_mem_region(mem_res->start, resource_size(mem_res));
 err0:
 	platform_set_drvdata(pdev, NULL);
 	spi_master_put(master);
@@ -1393,7 +1382,6 @@ static int s3c64xx_spi_remove(struct platform_device *pdev)
 {
 	struct spi_master *master = spi_master_get(platform_get_drvdata(pdev));
 	struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
-	struct resource	*mem_res;
 
 	pm_runtime_disable(&pdev->dev);
 
@@ -1412,12 +1400,6 @@ static int s3c64xx_spi_remove(struct platform_device *pdev)
 	if (!sdd->cntrlr_info->cfg_gpio && pdev->dev.of_node)
 		s3c64xx_spi_dt_gpio_free(sdd);
 
-	iounmap((void *) sdd->regs);
-
-	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (mem_res != NULL)
-		release_mem_region(mem_res->start, resource_size(mem_res));
-
 	platform_set_drvdata(pdev, NULL);
 	spi_master_put(master);