drivers/gpu/drm/arm/display/include/malidp_io.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/arm/display/include/malidp_io.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/arm/display/include/malidp_io.h
Extension
.h
Size
1027 bytes
Lines
50
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _MALIDP_IO_H_
#define _MALIDP_IO_H_

#include <linux/io.h>

static inline u32
malidp_read32(u32 __iomem *base, u32 offset)
{
	return readl((base + (offset >> 2)));
}

static inline void
malidp_write32(u32 __iomem *base, u32 offset, u32 v)
{
	writel(v, (base + (offset >> 2)));
}

static inline void
malidp_write64(u32 __iomem *base, u32 offset, u64 v)
{
	writel(lower_32_bits(v), (base + (offset >> 2)));
	writel(upper_32_bits(v), (base + (offset >> 2) + 1));
}

static inline void
malidp_write32_mask(u32 __iomem *base, u32 offset, u32 m, u32 v)
{
	u32 tmp = malidp_read32(base, offset);

	tmp &= (~m);
	malidp_write32(base, offset, v | tmp);
}

static inline void
malidp_write_group(u32 __iomem *base, u32 offset, int num, const u32 *values)
{
	int i;

	for (i = 0; i < num; i++)
		malidp_write32(base, offset + i * 4, values[i]);
}

#endif /*_MALIDP_IO_H_*/

Annotation

Implementation Notes