cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

misc.c (2031B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Copyright (C) 2007 PA Semi, Inc
      4 *
      5 * Parts based on arch/powerpc/sysdev/fsl_soc.c:
      6 *
      7 * 2006 (c) MontaVista Software, Inc.
      8 */
      9
     10#include <linux/errno.h>
     11#include <linux/kernel.h>
     12#include <linux/pci.h>
     13#include <linux/of.h>
     14#include <linux/of_irq.h>
     15#include <linux/i2c.h>
     16
     17#ifdef CONFIG_I2C_BOARDINFO
     18/* The below is from fsl_soc.c.  It's copied because since there are no
     19 * official bus bindings at this time it doesn't make sense to share across
     20 * the platforms, even though they happen to be common.
     21 */
     22struct i2c_driver_device {
     23	char    *of_device;
     24	char    *i2c_type;
     25};
     26
     27static struct i2c_driver_device i2c_devices[] __initdata = {
     28	{"dallas,ds1338",  "ds1338"},
     29};
     30
     31static int __init find_i2c_driver(struct device_node *node,
     32				     struct i2c_board_info *info)
     33{
     34	int i;
     35
     36	for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) {
     37		if (!of_device_is_compatible(node, i2c_devices[i].of_device))
     38			continue;
     39		if (strlcpy(info->type, i2c_devices[i].i2c_type,
     40			    I2C_NAME_SIZE) >= I2C_NAME_SIZE)
     41			return -ENOMEM;
     42		return 0;
     43	}
     44	return -ENODEV;
     45}
     46
     47static int __init pasemi_register_i2c_devices(void)
     48{
     49	struct pci_dev *pdev;
     50	struct device_node *adap_node;
     51	struct device_node *node;
     52
     53	pdev = NULL;
     54	while ((pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa003, pdev))) {
     55		adap_node = pci_device_to_OF_node(pdev);
     56
     57		if (!adap_node)
     58			continue;
     59
     60		for_each_child_of_node(adap_node, node) {
     61			struct i2c_board_info info = {};
     62			const u32 *addr;
     63			int len;
     64
     65			addr = of_get_property(node, "reg", &len);
     66			if (!addr || len < sizeof(int) ||
     67			    *addr > (1 << 10) - 1) {
     68				pr_warn("pasemi_register_i2c_devices: invalid i2c device entry\n");
     69				continue;
     70			}
     71
     72			info.irq = irq_of_parse_and_map(node, 0);
     73			if (!info.irq)
     74				info.irq = -1;
     75
     76			if (find_i2c_driver(node, &info) < 0)
     77				continue;
     78
     79			info.addr = *addr;
     80
     81			i2c_register_board_info(PCI_FUNC(pdev->devfn), &info,
     82						1);
     83		}
     84	}
     85	return 0;
     86}
     87device_initcall(pasemi_register_i2c_devices);
     88#endif