arch/arm/mach-omap1/gpio15xx.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-omap1/gpio15xx.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-omap1/gpio15xx.c
Extension
.c
Size
2813 bytes
Lines
117
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * OMAP15xx specific gpio init
 *
 * Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com/
 *
 * Author:
 *	Charulatha V <charu@ti.com>
 */

#include <linux/platform_data/gpio-omap.h>
#include <linux/soc/ti/omap1-soc.h>
#include <asm/irq.h>

#include "irqs.h"

#define OMAP1_MPUIO_VBASE		OMAP1_MPUIO_BASE
#define OMAP1510_GPIO_BASE		0xFFFCE000

/* gpio1 */
static struct resource omap15xx_mpu_gpio_resources[] = {
	{
		.start	= OMAP1_MPUIO_VBASE,
		.end	= OMAP1_MPUIO_VBASE + SZ_2K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.start	= INT_MPUIO,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct omap_gpio_reg_offs omap15xx_mpuio_regs = {
	.revision       = USHRT_MAX,
	.direction	= OMAP_MPUIO_IO_CNTL,
	.datain		= OMAP_MPUIO_INPUT_LATCH,
	.dataout	= OMAP_MPUIO_OUTPUT,
	.irqstatus	= OMAP_MPUIO_GPIO_INT,
	.irqenable	= OMAP_MPUIO_GPIO_MASKIT,
	.irqenable_inv	= true,
	.irqctrl	= OMAP_MPUIO_GPIO_INT_EDGE,
};

static struct omap_gpio_platform_data omap15xx_mpu_gpio_config = {
	.is_mpuio		= true,
	.bank_width		= 16,
	.bank_stride		= 1,
	.regs			= &omap15xx_mpuio_regs,
};

static struct platform_device omap15xx_mpu_gpio = {
	.name           = "omap_gpio",
	.id             = 0,
	.dev            = {
		.platform_data = &omap15xx_mpu_gpio_config,
	},
	.num_resources = ARRAY_SIZE(omap15xx_mpu_gpio_resources),
	.resource = omap15xx_mpu_gpio_resources,
};

/* gpio2 */
static struct resource omap15xx_gpio_resources[] = {
	{
		.start	= OMAP1510_GPIO_BASE,
		.end	= OMAP1510_GPIO_BASE + SZ_2K - 1,
		.flags	= IORESOURCE_MEM,
	},
	{
		.start	= INT_GPIO_BANK1,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct omap_gpio_reg_offs omap15xx_gpio_regs = {
	.revision	= USHRT_MAX,
	.direction	= OMAP1510_GPIO_DIR_CONTROL,
	.datain		= OMAP1510_GPIO_DATA_INPUT,
	.dataout	= OMAP1510_GPIO_DATA_OUTPUT,
	.irqstatus	= OMAP1510_GPIO_INT_STATUS,
	.irqenable	= OMAP1510_GPIO_INT_MASK,
	.irqenable_inv	= true,
	.irqctrl	= OMAP1510_GPIO_INT_CONTROL,
	.pinctrl	= OMAP1510_GPIO_PIN_CONTROL,
};

static struct omap_gpio_platform_data omap15xx_gpio_config = {
	.bank_width		= 16,
	.regs                   = &omap15xx_gpio_regs,
};

Annotation

Implementation Notes