spi/spi-sh: add IORESOURCE_MEM_TYPE_MASK decoding for access size

This SPI controller's access size is 32, or 8-bit. The previous driver
supported 32-bit only. So, this patch adds IORESOURCE_MEM_TYPE_MASK
decoding, an then, the driver can handle the SPI controller of 8-bit.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 23 insertions, 2 deletions

diff --git a/drivers/spi/spi-sh.c b/drivers/spi/spi-sh.c
index 70c8af9f7ccc..79442c31bcd9 100644
--- a/drivers/spi/spi-sh.c
+++ b/drivers/spi/spi-sh.c
@@ -92,17 +92,26 @@ struct spi_sh_data {
         unsigned long cr1;
         wait_queue_head_t wait;
         spinlock_t lock;
+        int width;
 };
 
 static void spi_sh_write(struct spi_sh_data *ss, unsigned long data,
                              unsigned long offset)
 {
-        writel(data, ss->addr + offset);
+        if (ss->width == 8)
+                iowrite8(data, ss->addr + (offset >> 2));
+        else if (ss->width == 32)
+                iowrite32(data, ss->addr + offset);
 }
 
 static unsigned long spi_sh_read(struct spi_sh_data *ss, unsigned long offset)
 {
-        return readl(ss->addr + offset);
+        if (ss->width == 8)
+                return ioread8(ss->addr + (offset >> 2));
+        else if (ss->width == 32)
+                return ioread32(ss->addr + offset);
+        else
+                return 0;
 }
 
 static void spi_sh_set_bit(struct spi_sh_data *ss, unsigned long val,
@@ -464,6 +473,18 @@ static int __devinit spi_sh_probe(struct platform_device *pdev)
         ss = spi_master_get_devdata(master);
         dev_set_drvdata(&pdev->dev, ss);
 
+        switch (res->flags & IORESOURCE_MEM_TYPE_MASK) {
+        case IORESOURCE_MEM_8BIT:
+                ss->width = 8;
+                break;
+        case IORESOURCE_MEM_32BIT:
+                ss->width = 32;
+                break;
+        default:
+                dev_err(&pdev->dev, "No support width\n");
+                ret = -ENODEV;
+                goto error1;
+        }
         ss->irq = irq;
         ss->master = master;
         ss->addr = ioremap(res->start, resource_size(res));