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path: root/drivers/video/backlight/ep93xx_bl.c
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Diffstat (limited to 'drivers/video/backlight/ep93xx_bl.c')
-rw-r--r--drivers/video/backlight/ep93xx_bl.c25
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/video/backlight/ep93xx_bl.c b/drivers/video/backlight/ep93xx_bl.c
index b62b8b9063b5..08214e1f0958 100644
--- a/drivers/video/backlight/ep93xx_bl.c
+++ b/drivers/video/backlight/ep93xx_bl.c
@@ -17,11 +17,6 @@
#include <linux/fb.h>
#include <linux/backlight.h>
-#include <mach/hardware.h>
-
-#define EP93XX_RASTER_REG(x) (EP93XX_RASTER_BASE + (x))
-#define EP93XX_RASTER_BRIGHTNESS EP93XX_RASTER_REG(0x20)
-
#define EP93XX_MAX_COUNT 255
#define EP93XX_MAX_BRIGHT 255
#define EP93XX_DEF_BRIGHT 128
@@ -35,7 +30,7 @@ static int ep93xxbl_set(struct backlight_device *bl, int brightness)
{
struct ep93xxbl *ep93xxbl = bl_get_data(bl);
- __raw_writel((brightness << 8) | EP93XX_MAX_COUNT, ep93xxbl->mmio);
+ writel((brightness << 8) | EP93XX_MAX_COUNT, ep93xxbl->mmio);
ep93xxbl->brightness = brightness;
@@ -70,21 +65,29 @@ static int __init ep93xxbl_probe(struct platform_device *dev)
struct ep93xxbl *ep93xxbl;
struct backlight_device *bl;
struct backlight_properties props;
+ struct resource *res;
ep93xxbl = devm_kzalloc(&dev->dev, sizeof(*ep93xxbl), GFP_KERNEL);
if (!ep93xxbl)
return -ENOMEM;
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENXIO;
+
/*
- * This register is located in the range already ioremap'ed by
- * the framebuffer driver. A MFD driver seems a bit of overkill
- * to handle this so use the static I/O mapping; this address
- * is already virtual.
+ * FIXME - We don't do a request_mem_region here because we are
+ * sharing the register space with the framebuffer driver (see
+ * drivers/video/ep93xx-fb.c) and doing so will cause the second
+ * loaded driver to return -EBUSY.
*
* NOTE: No locking is required; the framebuffer does not touch
* this register.
*/
- ep93xxbl->mmio = EP93XX_RASTER_BRIGHTNESS;
+ ep93xxbl->mmio = devm_ioremap(&dev->dev, res->start,
+ resource_size(res));
+ if (!ep93xxbl->mmio)
+ return -ENXIO;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_RAW;