simplefb: formalize pseudo palette handling

Add a proper struct describing simplefb private data, with the palette in there,
instead of directly storing the palette in the fb_info->par pointer.
Signed-off-by: NLuc Verhaegen <libv@skynet.be>
Acked-by: NStephen Warren <swarren@nvidia.com>
[hdegoede@redhat.com: drop unnecessary void * cast]
Reviewed-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: NDavid Herrmann <dh.herrmann@gmail.com>
Acked-by: NGrant Likely <grant.likely@linaro.org>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/simplefb.c

@@ -41,6 +41,8 @@ static struct fb_var_screeninfo simplefb_var = {
 	.vmode		= FB_VMODE_NONINTERLACED,
 };
 
+#define PSEUDO_PALETTE_SIZE 16
+
 static int simplefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 			      u_int transp, struct fb_info *info)
 {
@@ -50,7 +52,7 @@ static int simplefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 	u32 cb = blue >> (16 - info->var.blue.length);
 	u32 value;
 
-	if (regno >= 16)
+	if (regno >= PSEUDO_PALETTE_SIZE)
 		return -EINVAL;
 
 	value = (cr << info->var.red.offset) |
@@ -163,11 +165,16 @@ static int simplefb_parse_pd(struct platform_device *pdev,
 	return 0;
 }
 
+struct simplefb_par {
+	u32 palette[PSEUDO_PALETTE_SIZE];
+};
+
 static int simplefb_probe(struct platform_device *pdev)
 {
 	int ret;
 	struct simplefb_params params;
 	struct fb_info *info;
+	struct simplefb_par *par;
 	struct resource *mem;
 
 	if (fb_get_options("simplefb", NULL))
@@ -188,11 +195,13 @@ static int simplefb_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	info = framebuffer_alloc(sizeof(u32) * 16, &pdev->dev);
+	info = framebuffer_alloc(sizeof(struct simplefb_par), &pdev->dev);
 	if (!info)
 		return -ENOMEM;
 	platform_set_drvdata(pdev, info);
 
+	par = info->par;
+
 	info->fix = simplefb_fix;
 	info->fix.smem_start = mem->start;
 	info->fix.smem_len = resource_size(mem);
@@ -225,7 +234,7 @@ static int simplefb_probe(struct platform_device *pdev)
 		framebuffer_release(info);
 		return -ENODEV;
 	}
-	info->pseudo_palette = (void *)(info + 1);
+	info->pseudo_palette = par->palette;
 
 	dev_info(&pdev->dev, "framebuffer at 0x%lx, 0x%x bytes, mapped to 0x%p\n",
 			     info->fix.smem_start, info->fix.smem_len,