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Commit be2553ff authored by Olof Johansson's avatar Olof Johansson Committed by Paul Mackerras
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[POWERPC] pasemi: Register i2c devices at boot 



Setup i2c_board_info based on device tree contents.  This has to be
a device_initcall since we need PCI to be probed by the time we
run it, but before the actual driver is initialized.

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 3d5d27c4

arch/powerpc/platforms/pasemi/Makefile

+1 −1
Original line number Diff line number Diff line 
obj-y	+= setup.o pci.o time.o idle.o powersave.o iommu.o dma_lib.o

obj-y	+= setup.o pci.o time.o idle.o powersave.o iommu.o dma_lib.o misc.o

obj-$(CONFIG_PPC_PASEMI_MDIO)	+= gpio_mdio.o

obj-$(CONFIG_PPC_PASEMI_CPUFREQ) += cpufreq.o

arch/powerpc/platforms/pasemi/misc.c

0 → 100644
+97 −0
Original line number Diff line number Diff line 
/*

 * 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_driver;

	char    *i2c_type;

};



static struct i2c_driver_device i2c_devices[] __initdata = {

	{"dallas,ds1338",  "rtc-ds1307",  "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->driver_name, i2c_devices[i].i2c_driver,

			    KOBJ_NAME_LEN) >= KOBJ_NAME_LEN ||

		    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\n");

				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