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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 16:20:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 16:20:43 -0700
commit2fa379474fe2227d4d691d2d24eab4e3bdb3b26b (patch)
tree6d91e77cf398f992dc67bdd3be74b985640b1a42
parentMerge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc (diff)
parentMerge branch 'next/devel-samsung-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/spi (diff)
downloadlinux-dev-2fa379474fe2227d4d691d2d24eab4e3bdb3b26b.tar.xz
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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()
-rw-r--r--drivers/spi/spi-s3c64xx.c42
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);