[PATCH 03/15] drm/ast: Use constants for AHBC registers

[Thomas Zimmermann <tzimmermann@suse.de>]

AHBC is the Advanced High-Speed Bus Controller. AHBC registers are
located in the memory range within [0x1e600000, 0x1e61ffff]. Refer
to them with constants named AST_REG_AHBC<n>, where <n> is the byte
offset into the range.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/ast/ast_2500.c |  6 +++---
 drivers/gpu/drm/ast/ast_reg.h  | 11 +++++++++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_2500.c b/drivers/gpu/drm/ast/ast_2500.c
index 2a52af0ded56..f751a27e7eb3 100644
--- a/drivers/gpu/drm/ast/ast_2500.c
+++ b/drivers/gpu/drm/ast/ast_2500.c
@@ -109,9 +109,9 @@ void ast_2500_patch_ahb(void __iomem *regs)
 	u32 data;
 
 	/* Clear bus lock condition */
-	__ast_moutdwm(regs, 0x1e600000, 0xAEED1A03);
-	__ast_moutdwm(regs, 0x1e600084, 0x00010000);
-	__ast_moutdwm(regs, 0x1e600088, 0x00000000);
+	__ast_moutdwm(regs, AST_REG_AHBC00, AST_REG_AHBC00_PROTECT_KEY);
+	__ast_moutdwm(regs, AST_REG_AHBC84, 0x00010000);
+	__ast_moutdwm(regs, AST_REG_AHBC88, 0x00000000);
 	__ast_moutdwm(regs, 0x1e6e2000, 0x1688A8A8);
 
 	data = __ast_mindwm(regs, 0x1e6e2070);
diff --git a/drivers/gpu/drm/ast/ast_reg.h b/drivers/gpu/drm/ast/ast_reg.h
index ca9403efc7f9..0bc033dbac55 100644
--- a/drivers/gpu/drm/ast/ast_reg.h
+++ b/drivers/gpu/drm/ast/ast_reg.h
@@ -87,4 +87,15 @@
 #define AST_REG_P2A04				AST_REG_P2A(0xf004)
 #define AST_REG_P2A04_BASE_MASK			GENMASK(31, 16)
 
+/*
+ * AHB Controller (0x1e600000 - 0x1e61ffff)
+ */
+
+#define AST_REG_AHBC_BASE			(0x1e600000)
+#define AST_REG_AHBC(__offset)			(AST_REG_AHBC_BASE + (__offset))
+#define AST_REG_AHBC00				AST_REG_AHBC(0x00)
+#define AST_REG_AHBC00_PROTECT_KEY		(0xaeed1a03)
+#define AST_REG_AHBC84				AST_REG_AHBC(0x84)
+#define AST_REG_AHBC88				AST_REG_AHBC(0x88)
+
 #endif
-- 
2.53.0