89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2007 PA Semi, Inc
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*
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* Parts based on arch/powerpc/sysdev/fsl_soc.c:
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*
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* 2006 (c) MontaVista Software, Inc.
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/of.h>
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#include <linux/i2c.h>
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#ifdef CONFIG_I2C_BOARDINFO
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/* The below is from fsl_soc.c. It's copied because since there are no
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* official bus bindings at this time it doesn't make sense to share across
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* the platforms, even though they happen to be common.
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*/
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struct i2c_driver_device {
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char *of_device;
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char *i2c_type;
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};
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static struct i2c_driver_device i2c_devices[] __initdata = {
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{"dallas,ds1338", "ds1338"},
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};
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static int __init find_i2c_driver(struct device_node *node,
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struct i2c_board_info *info)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) {
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if (!of_device_is_compatible(node, i2c_devices[i].of_device))
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continue;
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if (strlcpy(info->type, i2c_devices[i].i2c_type,
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I2C_NAME_SIZE) >= I2C_NAME_SIZE)
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return -ENOMEM;
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return 0;
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}
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return -ENODEV;
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}
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static int __init pasemi_register_i2c_devices(void)
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{
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struct pci_dev *pdev;
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struct device_node *adap_node;
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struct device_node *node;
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pdev = NULL;
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while ((pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa003, pdev))) {
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adap_node = pci_device_to_OF_node(pdev);
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if (!adap_node)
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continue;
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node = NULL;
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while ((node = of_get_next_child(adap_node, node))) {
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struct i2c_board_info info = {};
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const u32 *addr;
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int len;
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addr = of_get_property(node, "reg", &len);
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if (!addr || len < sizeof(int) ||
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*addr > (1 << 10) - 1) {
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pr_warn("pasemi_register_i2c_devices: invalid i2c device entry\n");
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continue;
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}
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info.irq = irq_of_parse_and_map(node, 0);
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if (!info.irq)
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info.irq = -1;
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if (find_i2c_driver(node, &info) < 0)
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continue;
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info.addr = *addr;
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i2c_register_board_info(PCI_FUNC(pdev->devfn), &info,
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1);
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}
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}
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return 0;
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}
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device_initcall(pasemi_register_i2c_devices);
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#endif
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