spi: S3C24XX: reset register status on resume.

Fix a bug in the spi_s3c24xx driver where it does not reset the registers
of the hardware when resuming from suspend (this block has been reset over
suspend).

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/spi/spi_s3c24xx.c b/drivers/spi/spi_s3c24xx.c
index 1c643c9e1f15ff793e5d7c140e9f93ee96320544..21661c7959c87cab171323d8dc1821046ee77604 100644 (file)
--- a/drivers/spi/spi_s3c24xx.c
+++ b/drivers/spi/spi_s3c24xx.c
@@ -236,6 +236,19 @@ static irqreturn_t s3c24xx_spi_irq(int irq, void *dev)
        return IRQ_HANDLED;
 }
 
+static void s3c24xx_spi_initialsetup(struct s3c24xx_spi *hw)
+{
+       /* for the moment, permanently enable the clock */
+
+       clk_enable(hw->clk);
+
+       /* program defaults into the registers */
+
+       writeb(0xff, hw->regs + S3C2410_SPPRE);
+       writeb(SPPIN_DEFAULT, hw->regs + S3C2410_SPPIN);
+       writeb(SPCON_DEFAULT, hw->regs + S3C2410_SPCON);
+}
+
 static int __init s3c24xx_spi_probe(struct platform_device *pdev)
 {
        struct s3c2410_spi_info *pdata;
@@ -327,15 +340,7 @@ static int __init s3c24xx_spi_probe(struct platform_device *pdev)
                goto err_no_clk;
        }
 
-       /* for the moment, permanently enable the clock */
-
-       clk_enable(hw->clk);
-
-       /* program defaults into the registers */
-
-       writeb(0xff, hw->regs + S3C2410_SPPRE);
-       writeb(SPPIN_DEFAULT, hw->regs + S3C2410_SPPIN);
-       writeb(SPCON_DEFAULT, hw->regs + S3C2410_SPCON);
+       s3c24xx_spi_initialsetup(hw);
 
        /* setup any gpio we can */
 
@@ -415,7 +420,7 @@ static int s3c24xx_spi_resume(struct platform_device *pdev)
 {
        struct s3c24xx_spi *hw = platform_get_drvdata(pdev);
 
-       clk_enable(hw->clk);
+       s3c24xx_spi_initialsetup(hw);
        return 0;
 }