drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (c) 2014 Broadcom Corporation
   4  */
   5 #include <linux/init.h>
   6 #include <linux/of.h>
   7 #include <linux/of_irq.h>
   8
   9 #include <defs.h>
  10 #include "debug.h"
  11 #include "core.h"
  12 #include "common.h"
  13 #include "of.h"
  14
  15 void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
  16                     struct brcmf_mp_device *settings)
  17 {
  18         struct brcmfmac_sdio_pd *sdio = &settings->bus.sdio;
  19         struct device_node *root, *np = dev->of_node;
  20         int irq;
  21         u32 irqf;
  22         u32 val;
  23
  24         /* Set board-type to the first string of the machine compatible prop */
  25         root = of_find_node_by_path("/");
  26         if (root) {
  27                 int i, len;
  28                 char *board_type;
  29                 const char *tmp;
  30
  31                 of_property_read_string_index(root, "compatible", 0, &tmp);
  32
  33                 /* get rid of '/' in the compatible string to be able to find the FW */
  34                 len = strlen(tmp) + 1;
  35                 board_type = devm_kzalloc(dev, len, GFP_KERNEL);
  36                 strscpy(board_type, tmp, len);
  37                 for (i = 0; i < board_type[i]; i++) {
  38                         if (board_type[i] == '/')
  39                                 board_type[i] = '-';
  40                 }
  41                 settings->board_type = board_type;
  42
  43                 of_node_put(root);
  44         }
  45
  46         if (!np || bus_type != BRCMF_BUSTYPE_SDIO ||
  47             !of_device_is_compatible(np, "brcm,bcm4329-fmac"))
  48                 return;
  49
  50         if (of_property_read_u32(np, "brcm,drive-strength", &val) == 0)
  51                 sdio->drive_strength = val;
  52
  53         /* make sure there are interrupts defined in the node */
  54         if (!of_find_property(np, "interrupts", NULL))
  55                 return;
  56
  57         irq = irq_of_parse_and_map(np, 0);
  58         if (!irq) {
  59                 brcmf_err("interrupt could not be mapped\n");
  60                 return;
  61         }
  62         irqf = irqd_get_trigger_type(irq_get_irq_data(irq));
  63
  64         sdio->oob_irq_supported = true;
  65         sdio->oob_irq_nr = irq;
  66         sdio->oob_irq_flags = irqf;
  67 }