package/kernel/mac80211/patches/549-ath9k_enable_gpio_buttons.patch

   1 From: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
   2 Subject: [PATCH v5 5/8] mac80211: ath9k: enable GPIO buttons
   3
   4 Enable platform-defined GPIO button support for ath9k device.
   5 Key poller is activated for attached platform buttons.
   6 Requires ath9k GPIO chip access.
   7
   8 Signed-off-by: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11 --- a/drivers/net/wireless/ath/ath9k/ath9k.h
  12 +++ b/drivers/net/wireless/ath/ath9k/ath9k.h
  13 @@ -1069,6 +1069,7 @@ struct ath_softc {
  14         struct list_head leds;
  15  #ifdef CONFIG_GPIOLIB
  16         struct ath9k_gpio_chip *gpiochip;
  17 +       struct platform_device *btnpdev;        /* gpio-keys-polled */
  18  #endif
  19  #endif
  20
  21 --- a/drivers/net/wireless/ath/ath9k/gpio.c
  22 +++ b/drivers/net/wireless/ath/ath9k/gpio.c
  23 @@ -17,6 +17,8 @@
  24  #include "ath9k.h"
  25  #include <linux/ath9k_platform.h>
  26  #include <linux/gpio.h>
  27 +#include <linux/platform_device.h>
  28 +#include <linux/gpio_keys.h>
  29
  30  #ifdef CPTCFG_MAC80211_LEDS
  31
  32 @@ -129,6 +131,64 @@ static void ath9k_unregister_gpio_chip(s
  33         sc->gpiochip = NULL;
  34  }
  35
  36 +/******************/
  37 +/*  GPIO Buttons  */
  38 +/******************/
  39 +
  40 +/* add GPIO buttons */
  41 +static void ath9k_init_buttons(struct ath_softc *sc)
  42 +{
  43 +       struct ath9k_platform_data *pdata = sc->dev->platform_data;
  44 +       struct platform_device *pdev;
  45 +       struct gpio_keys_platform_data gkpdata;
  46 +       struct gpio_keys_button *bt;
  47 +       int i;
  48 +
  49 +       if (!sc->gpiochip)
  50 +               return;
  51 +
  52 +       if (!pdata || !pdata->btns || !pdata->num_btns)
  53 +               return;
  54 +
  55 +       bt = devm_kmemdup(sc->dev, pdata->btns,
  56 +                         pdata->num_btns * sizeof(struct gpio_keys_button),
  57 +                         GFP_KERNEL);
  58 +       if (!bt)
  59 +               return;
  60 +
  61 +       for (i = 0; i < pdata->num_btns; i++) {
  62 +               ath9k_hw_gpio_request_in(sc->sc_ah, pdata->btns[i].gpio,
  63 +                                        "ath9k-gpio");
  64 +               bt[i].gpio = sc->gpiochip->gchip.base + pdata->btns[i].gpio;
  65 +       }
  66 +
  67 +       memset(&gkpdata, 0, sizeof(struct gpio_keys_platform_data));
  68 +       gkpdata.buttons = bt;
  69 +       gkpdata.nbuttons = pdata->num_btns;
  70 +       gkpdata.poll_interval = pdata->btn_poll_interval;
  71 +
  72 +       pdev = platform_device_register_data(sc->dev, "gpio-keys-polled",
  73 +                                            PLATFORM_DEVID_AUTO, &gkpdata,
  74 +                                            sizeof(gkpdata));
  75 +       if (!IS_ERR_OR_NULL(pdev))
  76 +               sc->btnpdev = pdev;
  77 +       else {
  78 +               sc->btnpdev = NULL;
  79 +               devm_kfree(sc->dev, bt);
  80 +       }
  81 +}
  82 +
  83 +/* remove GPIO buttons */
  84 +static void ath9k_deinit_buttons(struct ath_softc *sc)
  85 +{
  86 +       if (!sc->gpiochip || !sc->btnpdev)
  87 +               return;
  88 +
  89 +       platform_device_unregister(sc->btnpdev);
  90 +
  91 +       sc->btnpdev = NULL;
  92 +}
  93 +
  94  #else /* CONFIG_GPIOLIB */
  95
  96  static inline void ath9k_register_gpio_chip(struct ath_softc *sc)
  97 @@ -139,6 +199,14 @@ static inline void ath9k_unregister_gpio
  98  {
  99  }
 100
 101 +static inline void ath9k_init_buttons(struct ath_softc *sc)
 102 +{
 103 +}
 104 +
 105 +static inline void ath9k_deinit_buttons(struct ath_softc *sc)
 106 +{
 107 +}
 108 +
 109  #endif /* CONFIG_GPIOLIB */
 110
 111  /********************************/
 112 @@ -262,6 +330,7 @@ void ath_deinit_leds(struct ath_softc *s
 113  {
 114         struct ath_led *led;
 115
 116 +       ath9k_deinit_buttons(sc);
 117         while (!list_empty(&sc->leds)) {
 118                 led = list_first_entry(&sc->leds, struct ath_led, list);
 119  #ifdef CONFIG_GPIOLIB
 120 @@ -299,6 +368,7 @@ void ath_init_leds(struct ath_softc *sc)
 121                 ath9k_register_gpio_chip(sc);
 122
 123         ath_fill_led_pin(sc);
 124 +       ath9k_init_buttons(sc);
 125
 126         if (pdata && pdata->leds && pdata->num_leds)
 127                 for (i = 0; i < pdata->num_leds; i++) {
 128 --- a/include/linux/ath9k_platform.h
 129 +++ b/include/linux/ath9k_platform.h
 130 @@ -50,6 +50,10 @@ struct ath9k_platform_data {
 131         int num_leds;
 132         const struct gpio_led *leds;
 133         const char *led_name;
 134 +
 135 +       unsigned num_btns;
 136 +       const struct gpio_keys_button *btns;
 137 +       unsigned btn_poll_interval;
 138  };
 139
 140  #endif /* _LINUX_ATH9K_PLATFORM_H */