drivers/phy/mediatek/phy-mtk-io.h

Source file repositories/reference/linux-study-clean/drivers/phy/mediatek/phy-mtk-io.h

File Facts

System
Linux kernel
Corpus path
drivers/phy/mediatek/phy-mtk-io.h
Extension
.h
Size
897 bytes
Lines
47
Domain
Driver Families
Bucket
drivers/phy
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 __PHY_MTK_H__
#define __PHY_MTK_H__

#include <linux/bitfield.h>
#include <linux/io.h>

static inline void mtk_phy_clear_bits(void __iomem *reg, u32 bits)
{
	u32 tmp = readl(reg);

	tmp &= ~bits;
	writel(tmp, reg);
}

static inline void mtk_phy_set_bits(void __iomem *reg, u32 bits)
{
	u32 tmp = readl(reg);

	tmp |= bits;
	writel(tmp, reg);
}

static inline void mtk_phy_update_bits(void __iomem *reg, u32 mask, u32 val)
{
	u32 tmp = readl(reg);

	tmp &= ~mask;
	tmp |= val & mask;
	writel(tmp, reg);
}

/* field @mask shall be constant and continuous */
#define mtk_phy_update_field(reg, mask, val) \
({ \
	BUILD_BUG_ON_MSG(!__builtin_constant_p(mask), "mask is not constant"); \
	mtk_phy_update_bits(reg, mask, FIELD_PREP(mask, val)); \
})

#endif

Annotation

Implementation Notes