drivers/pmdomain/sunxi/sun50i-h6-prcm-ppu.c

Source file repositories/reference/linux-study-clean/drivers/pmdomain/sunxi/sun50i-h6-prcm-ppu.c

File Facts

System
Linux kernel
Corpus path
drivers/pmdomain/sunxi/sun50i-h6-prcm-ppu.c
Extension
.c
Size
5764 bytes
Lines
209
Domain
Driver Families
Bucket
drivers/pmdomain
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

struct sun50i_h6_ppu_pd {
	struct generic_pm_domain	genpd;
	void __iomem			*reg;
	u32				gate_mask;
	bool				negated;
};

#define FLAG_PPU_ALWAYS_ON	BIT(0)
#define FLAG_PPU_NEGATED	BIT(1)

struct sun50i_h6_ppu_desc {
	const char *name;
	u32 offset;
	u32 mask;
	unsigned int flags;
};

static const struct sun50i_h6_ppu_desc sun50i_h6_ppus[] = {
	{ "AVCC", PD_H6_VDD_SYS_REG, PD_H6_AVCC_VDD_GATE },
	{ "CPUS", PD_H6_VDD_SYS_REG, PD_H6_CPUS_VDD_GATE },
	{ "GPU", PD_H6_GPU_REG, PD_H6_GPU_GATE },
};
static const struct sun50i_h6_ppu_desc sun50i_h616_ppus[] = {
	{ "PLL", PD_H6_VDD_SYS_REG, PD_H6_AVCC_VDD_GATE,
		FLAG_PPU_ALWAYS_ON | FLAG_PPU_NEGATED },
	{ "ANA", PD_H6_VDD_SYS_REG, PD_H616_ANA_VDD_GATE, FLAG_PPU_ALWAYS_ON },
	{ "GPU", PD_H6_GPU_REG, PD_H6_GPU_GATE, FLAG_PPU_NEGATED },
};

struct sun50i_h6_ppu_data {
	const struct sun50i_h6_ppu_desc *descs;
	int nr_domains;
};

static const struct sun50i_h6_ppu_data sun50i_h6_ppu_data = {
	.descs = sun50i_h6_ppus,
	.nr_domains = ARRAY_SIZE(sun50i_h6_ppus),
};

static const struct sun50i_h6_ppu_data sun50i_h616_ppu_data = {
	.descs = sun50i_h616_ppus,
	.nr_domains = ARRAY_SIZE(sun50i_h616_ppus),
};

#define to_sun50i_h6_ppu_pd(_genpd) \
	container_of(_genpd, struct sun50i_h6_ppu_pd, genpd)

static bool sun50i_h6_ppu_power_status(const struct sun50i_h6_ppu_pd *pd)
{
	bool bit = readl(pd->reg) & pd->gate_mask;

	return bit ^ pd->negated;
}

static int sun50i_h6_ppu_pd_set_power(const struct sun50i_h6_ppu_pd *pd,
				      bool set_bit)
{
	u32 reg = readl(pd->reg);

	if (set_bit)
		writel(reg | pd->gate_mask, pd->reg);
	else
		writel(reg & ~pd->gate_mask, pd->reg);

	return 0;
}

static int sun50i_h6_ppu_pd_power_on(struct generic_pm_domain *genpd)
{
	const struct sun50i_h6_ppu_pd *pd = to_sun50i_h6_ppu_pd(genpd);

	return sun50i_h6_ppu_pd_set_power(pd, !pd->negated);
}

static int sun50i_h6_ppu_pd_power_off(struct generic_pm_domain *genpd)
{
	const struct sun50i_h6_ppu_pd *pd = to_sun50i_h6_ppu_pd(genpd);

	return sun50i_h6_ppu_pd_set_power(pd, pd->negated);
}

static int sun50i_h6_ppu_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct genpd_onecell_data *ppu;
	struct sun50i_h6_ppu_pd *pds;
	const struct sun50i_h6_ppu_data *data;
	void __iomem *base;
	int ret, i;

Annotation

Implementation Notes