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kernel add
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/*
* Copyright (C) 2007 PA Semi, Inc
*
* Parts based on arch/powerpc/sysdev/fsl_soc.c:
*
* 2006 (c) MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/i2c.h>
#ifdef CONFIG_I2C_BOARDINFO
/* The below is from fsl_soc.c. It's copied because since there are no
* official bus bindings at this time it doesn't make sense to share across
* the platforms, even though they happen to be common.
*/
struct i2c_driver_device {
char *of_device;
char *i2c_type;
};
static struct i2c_driver_device i2c_devices[] __initdata = {
{"dallas,ds1338", "ds1338"},
};
static int __init find_i2c_driver(struct device_node *node,
struct i2c_board_info *info)
{
int i;
for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) {
if (!of_device_is_compatible(node, i2c_devices[i].of_device))
continue;
if (strlcpy(info->type, i2c_devices[i].i2c_type,
I2C_NAME_SIZE) >= I2C_NAME_SIZE)
return -ENOMEM;
return 0;
}
return -ENODEV;
}
static int __init pasemi_register_i2c_devices(void)
{
struct pci_dev *pdev;
struct device_node *adap_node;
struct device_node *node;
pdev = NULL;
while ((pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa003, pdev))) {
adap_node = pci_device_to_OF_node(pdev);
if (!adap_node)
continue;
node = NULL;
while ((node = of_get_next_child(adap_node, node))) {
struct i2c_board_info info = {};
const u32 *addr;
int len;
addr = of_get_property(node, "reg", &len);
if (!addr || len < sizeof(int) ||
*addr > (1 << 10) - 1) {
printk(KERN_WARNING
"pasemi_register_i2c_devices: "
"invalid i2c device entry
");
continue;
}
info.irq = irq_of_parse_and_map(node, 0);
if (info.irq == NO_IRQ)
info.irq = -1;
if (find_i2c_driver(node, &info) < 0)
continue;
info.addr = *addr;
i2c_register_board_info(PCI_FUNC(pdev->devfn), &info,
1);
}
}
return 0;
}
device_initcall(pasemi_register_i2c_devices);
#endif
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