regmap: mmio: request native endian formatting

This will avoid the regmap core converting all addresses and values into
big endian, only for the mmio bus driver to have to convert them back to
native endian.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

drivers/base/regmap/regmap-mmio.c

@@ -37,7 +37,7 @@ static int regmap_mmio_gather_write(void *context,
 
 	BUG_ON(reg_size != 4);
 
-	offset = be32_to_cpup(reg);
+	offset = *(u32 *)reg;
 
 	while (val_size) {
 		switch (ctx->val_bytes) {
@@ -45,14 +45,14 @@ static int regmap_mmio_gather_write(void *context,
 			writeb(*(u8 *)val, ctx->regs + offset);
 			break;
 		case 2:
-			writew(be16_to_cpup(val), ctx->regs + offset);
+			writew(*(u16 *)val, ctx->regs + offset);
 			break;
 		case 4:
-			writel(be32_to_cpup(val), ctx->regs + offset);
+			writel(*(u32 *)val, ctx->regs + offset);
 			break;
 #ifdef CONFIG_64BIT
 		case 8:
-			writeq(be64_to_cpup(val), ctx->regs + offset);
+			writeq(*(u64 *)val, ctx->regs + offset);
 			break;
 #endif
 		default:
@@ -83,7 +83,7 @@ static int regmap_mmio_read(void *context,
 
 	BUG_ON(reg_size != 4);
 
-	offset = be32_to_cpup(reg);
+	offset = *(u32 *)reg;
 
 	while (val_size) {
 		switch (ctx->val_bytes) {
@@ -91,14 +91,14 @@ static int regmap_mmio_read(void *context,
 			*(u8 *)val = readb(ctx->regs + offset);
 			break;
 		case 2:
-			*(u16 *)val = cpu_to_be16(readw(ctx->regs + offset));
+			*(u16 *)val = readw(ctx->regs + offset);
 			break;
 		case 4:
-			*(u32 *)val = cpu_to_be32(readl(ctx->regs + offset));
+			*(u32 *)val = readl(ctx->regs + offset);
 			break;
 #ifdef CONFIG_64BIT
 		case 8:
-			*(u64 *)val = cpu_to_be32(readq(ctx->regs + offset));
+			*(u64 *)val = readq(ctx->regs + offset);
 			break;
 #endif
 		default:
@@ -124,6 +124,8 @@ static struct regmap_bus regmap_mmio = {
 	.gather_write = regmap_mmio_gather_write,
 	.read = regmap_mmio_read,
 	.free_context = regmap_mmio_free_context,
+	.reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
+	.val_format_endian_default = REGMAP_ENDIAN_NATIVE,
 };
 
 struct regmap_mmio_context *regmap_mmio_gen_context(void __iomem *regs,
@@ -162,6 +164,14 @@ struct regmap_mmio_context *regmap_mmio_gen_context(void __iomem *regs,
 	if (config->reg_stride < min_stride)
 		return ERR_PTR(-EINVAL);
 
+	switch (config->reg_format_endian) {
+	case REGMAP_ENDIAN_DEFAULT:
+	case REGMAP_ENDIAN_NATIVE:
+		break;
+	default:
+		return ERR_PTR(-EINVAL);
+	}
+
 	ctx = kzalloc(GFP_KERNEL, sizeof(*ctx));
 	if (!ctx)
 		return ERR_PTR(-ENOMEM);