drivers/video/backlight/lms283gf05.c

File Facts

System

Linux kernel

Corpus path

drivers/video/backlight/lms283gf05.c

Extension

.c

Size

3992 bytes

Lines

192

Domain

Driver Families

Bucket

drivers/video

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.

• 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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/device.h
• linux/kernel.h
• linux/delay.h
• linux/slab.h
• linux/gpio/consumer.h
• linux/lcd.h
• linux/spi/spi.h
• linux/module.h

Detected Declarations

• struct lms283gf05_state
• struct lms283gf05_seq
• function lms283gf05_reset
• function lms283gf05_toggle
• function lms283gf05_power_set
• function lms283gf05_probe

Annotated Snippet

struct lms283gf05_state {
	struct spi_device	*spi;
	struct lcd_device	*ld;
	struct gpio_desc	*reset;
};

struct lms283gf05_seq {
	unsigned char		reg;
	unsigned short		value;
	unsigned char		delay;
};

/* Magic sequences supplied by manufacturer, for details refer to datasheet */
static const struct lms283gf05_seq disp_initseq[] = {
	/* REG, VALUE, DELAY */
	{ 0x07, 0x0000, 0 },
	{ 0x13, 0x0000, 10 },

	{ 0x11, 0x3004, 0 },
	{ 0x14, 0x200F, 0 },
	{ 0x10, 0x1a20, 0 },
	{ 0x13, 0x0040, 50 },

	{ 0x13, 0x0060, 0 },
	{ 0x13, 0x0070, 200 },

	{ 0x01, 0x0127, 0 },
	{ 0x02,	0x0700, 0 },
	{ 0x03, 0x1030, 0 },
	{ 0x08, 0x0208, 0 },
	{ 0x0B, 0x0620, 0 },
	{ 0x0C, 0x0110, 0 },
	{ 0x30, 0x0120, 0 },
	{ 0x31, 0x0127, 0 },
	{ 0x32, 0x0000, 0 },
	{ 0x33, 0x0503, 0 },
	{ 0x34, 0x0727, 0 },
	{ 0x35, 0x0124, 0 },
	{ 0x36, 0x0706, 0 },
	{ 0x37, 0x0701, 0 },
	{ 0x38, 0x0F00, 0 },
	{ 0x39, 0x0F00, 0 },
	{ 0x40, 0x0000, 0 },
	{ 0x41, 0x0000, 0 },
	{ 0x42, 0x013f, 0 },
	{ 0x43, 0x0000, 0 },
	{ 0x44, 0x013f, 0 },
	{ 0x45, 0x0000, 0 },
	{ 0x46, 0xef00, 0 },
	{ 0x47, 0x013f, 0 },
	{ 0x48, 0x0000, 0 },
	{ 0x07, 0x0015, 30 },

	{ 0x07, 0x0017, 0 },

	{ 0x20, 0x0000, 0 },
	{ 0x21, 0x0000, 0 },
	{ 0x22, 0x0000, 0 }
};

static const struct lms283gf05_seq disp_pdwnseq[] = {
	{ 0x07, 0x0016, 30 },

	{ 0x07, 0x0004, 0 },
	{ 0x10, 0x0220, 20 },

	{ 0x13, 0x0060, 50 },

	{ 0x13, 0x0040, 50 },

	{ 0x13, 0x0000, 0 },
	{ 0x10, 0x0000, 0 }
};


static void lms283gf05_reset(struct gpio_desc *gpiod)
{
	gpiod_set_value(gpiod, 0); /* De-asserted */
	mdelay(100);
	gpiod_set_value(gpiod, 1); /* Asserted */
	mdelay(20);
	gpiod_set_value(gpiod, 0); /* De-asserted */
	mdelay(20);
}

static void lms283gf05_toggle(struct spi_device *spi,
				const struct lms283gf05_seq *seq, int sz)
{
	char buf[3];
	int i;

Annotation

• Immediate include surface: `linux/device.h`, `linux/kernel.h`, `linux/delay.h`, `linux/slab.h`, `linux/gpio/consumer.h`, `linux/lcd.h`, `linux/spi/spi.h`, `linux/module.h`.
• Detected declarations: `struct lms283gf05_state`, `struct lms283gf05_seq`, `function lms283gf05_reset`, `function lms283gf05_toggle`, `function lms283gf05_power_set`, `function lms283gf05_probe`.
• Atlas domain: Driver Families / drivers/video.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.