Merge tag 'spi' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull arm-soc spi updates from Arnd Bergmann:
 "These changes conceptually belong into the spi tree, but we decided to
  put them into arm-soc to better deal with interdependencies with other
  platform specific patches that are already there."

* tag 'spi' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  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()

1 files changed, 12 insertions, 30 deletions

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 0dedbbdb153a..646a7657fe62 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/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 @@ err3:
         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);