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drivers/video/fbdev: use ioremap_wc/wt() instead of __ioremap()

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_PAGE_NO_CACHE is a platform specific flag. In addition, this flag
is misleading because one would think it requests a noncached page
whereas a noncached page is _PAGE_NO_CACHE | _PAGE_GUARDED

_PAGE_NO_CACHE alone means write combined noncached page, so lets
use ioremap_wc() instead.

_PAGE_WRITETHRU is also platform specific flag. Use ioremap_wt()
instead.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2018-10-09 13:51:35 +00:00
committed by Michael Ellerman
parent 86c391bd5f
commit e04e39507c
4 changed files with 9 additions and 16 deletions
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3
drivers/video/fbdev/chipsfb.c
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@@ -27,7 +27,6 @@
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/console.h>
#include <asm/io.h>
#ifdef CONFIG_PMAC_BACKLIGHT
#include <asm/backlight.h>
@@ -401,7 +400,7 @@ static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent)
#endif /* CONFIG_PMAC_BACKLIGHT */
#ifdef CONFIG_PPC
p->screen_base = __ioremap(addr, 0x200000, _PAGE_NO_CACHE);
p->screen_base = ioremap_wc(addr, 0x200000);
#else
p->screen_base = ioremap(addr, 0x200000);
#endif