package/kernel/mac80211/patches/328-ath9k-parse-the-device-configuration-from-an-OF-node.patch

   1 From cea03be5a848823cb8052e2e7b93cb2249d5f60c Mon Sep 17 00:00:00 2001
   2 From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
   3 Date: Sun, 16 Oct 2016 22:59:07 +0200
   4 Subject: [PATCH 3/3] ath9k: parse the device configuration from an OF node
   5
   6 This allows setting the MAC address and specifying that the firmware
   7 will be requested from userspace (because there might not be a hardware
   8 EEPROM connected to the chip) for ath9k based PCI devices using
   9 the device tree.
  10
  11 There is some out-of-tree code to "convert devicetree to
  12 ath9k_platform_data" (for example in OpenWrt and LEDE) which becomes
  13 obsolete with this patch.
  14
  15 Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
  16 Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
  17 ---
  18  drivers/net/wireless/ath/ath9k/init.c | 42 +++++++++++++++++++++++++++++++++++
  19  1 file changed, 42 insertions(+)
  20
  21 --- a/drivers/net/wireless/ath/ath9k/init.c
  22 +++ b/drivers/net/wireless/ath/ath9k/init.c
  23 @@ -20,6 +20,8 @@
  24  #include <linux/slab.h>
  25  #include <linux/ath9k_platform.h>
  26  #include <linux/module.h>
  27 +#include <linux/of.h>
  28 +#include <linux/of_net.h>
  29  #include <linux/relay.h>
  30  #include <net/ieee80211_radiotap.h>
  31
  32 @@ -554,6 +556,42 @@ static int ath9k_init_platform(struct at
  33         return 0;
  34  }
  35
  36 +static int ath9k_of_init(struct ath_softc *sc)
  37 +{
  38 +       struct device_node *np = sc->dev->of_node;
  39 +       struct ath_hw *ah = sc->sc_ah;
  40 +       struct ath_common *common = ath9k_hw_common(ah);
  41 +       enum ath_bus_type bus_type = common->bus_ops->ath_bus_type;
  42 +       const char *mac;
  43 +       char eeprom_name[100];
  44 +       int ret;
  45 +
  46 +       if (!of_device_is_available(np))
  47 +               return 0;
  48 +
  49 +       ath_dbg(common, CONFIG, "parsing configuration from OF node\n");
  50 +
  51 +       if (of_property_read_bool(np, "qca,no-eeprom")) {
  52 +               /* ath9k-eeprom-<bus>-<id>.bin */
  53 +               scnprintf(eeprom_name, sizeof(eeprom_name),
  54 +                         "ath9k-eeprom-%s-%s.bin",
  55 +                         ath_bus_type_to_string(bus_type), dev_name(ah->dev));
  56 +
  57 +               ret = ath9k_eeprom_request(sc, eeprom_name);
  58 +               if (ret)
  59 +                       return ret;
  60 +       }
  61 +
  62 +       mac = of_get_mac_address(np);
  63 +       if (mac)
  64 +               ether_addr_copy(common->macaddr, mac);
  65 +
  66 +       ah->ah_flags &= ~AH_USE_EEPROM;
  67 +       ah->ah_flags |= AH_NO_EEP_SWAP;
  68 +
  69 +       return 0;
  70 +}
  71 +
  72  static int ath9k_init_softc(u16 devid, struct ath_softc *sc,
  73                             const struct ath_bus_ops *bus_ops)
  74  {
  75 @@ -610,6 +648,10 @@ static int ath9k_init_softc(u16 devid, s
  76         if (ret)
  77                 return ret;
  78
  79 +       ret = ath9k_of_init(sc);
  80 +       if (ret)
  81 +               return ret;
  82 +
  83         if (ath9k_led_active_high != -1)
  84                 ah->config.led_active_high = ath9k_led_active_high == 1;
  85