cregit-Linux how code gets into the kernel

Release 4.9 arch/arm/mach-davinci/usb-da8xx.c

/*
 * DA8xx USB
 */
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/platform_data/usb-davinci.h>
#include <linux/platform_device.h>
#include <linux/usb/musb.h>

#include <mach/common.h>
#include <mach/cputype.h>
#include <mach/da8xx.h>
#include <mach/irqs.h>


#define DA8XX_USB0_BASE		0x01e00000

#define DA8XX_USB1_BASE		0x01e25000

#if IS_ENABLED(CONFIG_USB_MUSB_HDRC)


static struct musb_hdrc_config musb_config = {
	.multipoint	= true,
	.num_eps	= 5,
	.ram_bits	= 10,
};


static struct musb_hdrc_platform_data usb_data = {
	/* OTG requires a Mini-AB connector */
	.mode           = MUSB_OTG,
	.clock		= "usb20",
	.config		= &musb_config,
};


static struct resource da8xx_usb20_resources[] = {
	{
		.start		= DA8XX_USB0_BASE,
		.end		= DA8XX_USB0_BASE + SZ_64K - 1,
		.flags		= IORESOURCE_MEM,
        },
	{
		.start		= IRQ_DA8XX_USB_INT,
		.flags		= IORESOURCE_IRQ,
		.name		= "mc",
        },
};


static u64 usb_dmamask = DMA_BIT_MASK(32);


static struct platform_device usb_dev = {
	.name		= "musb-da8xx",
	.id             = -1,
	.dev = {
		.platform_data		= &usb_data,
		.dma_mask		= &usb_dmamask,
		.coherent_dma_mask      = DMA_BIT_MASK(32),
        },
	.resource	= da8xx_usb20_resources,
	.num_resources	= ARRAY_SIZE(da8xx_usb20_resources),
};


int __init da8xx_register_usb20(unsigned int mA, unsigned int potpgt) { usb_data.power = mA > 510 ? 255 : mA / 2; usb_data.potpgt = (potpgt + 1) / 2; return platform_device_register(&usb_dev); }

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#else
int __init da8xx_register_usb20(unsigned int mA, unsigned int potpgt) { return 0; }

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#endif /* CONFIG_USB_MUSB_HDRC */ static struct resource da8xx_usb11_resources[] = { [0] = { .start = DA8XX_USB1_BASE, .end = DA8XX_USB1_BASE + SZ_4K - 1, .flags = IORESOURCE_MEM, }, [1] = { .start = IRQ_DA8XX_IRQN, .end = IRQ_DA8XX_IRQN, .flags = IORESOURCE_IRQ, }, }; static u64 da8xx_usb11_dma_mask = DMA_BIT_MASK(32); static struct platform_device da8xx_usb11_device = { .name = "ohci", .id = 0, .dev = { .dma_mask = &da8xx_usb11_dma_mask, .coherent_dma_mask = DMA_BIT_MASK(32), }, .num_resources = ARRAY_SIZE(da8xx_usb11_resources), .resource = da8xx_usb11_resources, };
int __init da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata) { da8xx_usb11_device.dev.platform_data = pdata; return platform_device_register(&da8xx_usb11_device); }

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