commit 0eb8880fac7b0f32ebab33f99e758c6b308e3aa1
author Shimoda, Yoshihiro <yoshihiro.shimoda.uh@renesas.com> Wed Mar 07 14:45:37 2012 +0900
committer Grant Likely <grant.likely@secretlab.ca> Wed Mar 07 19:18:45 2012 -0700
tree 2d8ca659f3db6d17a1957fd6c9957beace6c171e
parent d5a8003135da7afe311e4e13ff42000ab7cd2078

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>

drivers/spi/spi-sh.c

diff --git a/drivers/spi/spi-sh.c b/drivers/spi/spi-sh.c
index 70c8af9..79442c31 100644
--- a/drivers/spi/spi-sh.c
+++ b/drivers/spi/spi-sh.c
@@ -92,17 +92,26 @@
 	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 @@
 	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));