e86e3e38bd69eeef66147d805894885e5dde64d1
[openwrt/openwrt.git] / 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 +131,67 @@ 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 + if (pdata->btns[i].gpio == sc->sc_ah->led_pin)
63 + sc->sc_ah->led_pin = -1;
64 +
65 + ath9k_hw_gpio_request_in(sc->sc_ah, pdata->btns[i].gpio,
66 + "ath9k-gpio");
67 + bt[i].gpio = sc->gpiochip->gchip.base + pdata->btns[i].gpio;
68 + }
69 +
70 + memset(&gkpdata, 0, sizeof(struct gpio_keys_platform_data));
71 + gkpdata.buttons = bt;
72 + gkpdata.nbuttons = pdata->num_btns;
73 + gkpdata.poll_interval = pdata->btn_poll_interval;
74 +
75 + pdev = platform_device_register_data(sc->dev, "gpio-keys-polled",
76 + PLATFORM_DEVID_AUTO, &gkpdata,
77 + sizeof(gkpdata));
78 + if (!IS_ERR_OR_NULL(pdev))
79 + sc->btnpdev = pdev;
80 + else {
81 + sc->btnpdev = NULL;
82 + devm_kfree(sc->dev, bt);
83 + }
84 +}
85 +
86 +/* remove GPIO buttons */
87 +static void ath9k_deinit_buttons(struct ath_softc *sc)
88 +{
89 + if (!sc->gpiochip || !sc->btnpdev)
90 + return;
91 +
92 + platform_device_unregister(sc->btnpdev);
93 +
94 + sc->btnpdev = NULL;
95 +}
96 +
97 #else /* CONFIG_GPIOLIB */
98
99 static inline void ath9k_register_gpio_chip(struct ath_softc *sc)
100 @@ -139,6 +202,14 @@ static inline void ath9k_unregister_gpio
101 {
102 }
103
104 +static inline void ath9k_init_buttons(struct ath_softc *sc)
105 +{
106 +}
107 +
108 +static inline void ath9k_deinit_buttons(struct ath_softc *sc)
109 +{
110 +}
111 +
112 #endif /* CONFIG_GPIOLIB */
113
114 /********************************/
115 @@ -262,6 +333,7 @@ void ath_deinit_leds(struct ath_softc *s
116 {
117 struct ath_led *led;
118
119 + ath9k_deinit_buttons(sc);
120 while (!list_empty(&sc->leds)) {
121 led = list_first_entry(&sc->leds, struct ath_led, list);
122 #ifdef CONFIG_GPIOLIB
123 @@ -301,6 +373,7 @@ void ath_init_leds(struct ath_softc *sc)
124 }
125
126 ath_fill_led_pin(sc);
127 + ath9k_init_buttons(sc);
128
129 if (pdata && pdata->leds && pdata->num_leds)
130 for (i = 0; i < pdata->num_leds; i++) {
131 --- a/include/linux/ath9k_platform.h
132 +++ b/include/linux/ath9k_platform.h
133 @@ -49,6 +49,10 @@ struct ath9k_platform_data {
134
135 int num_leds;
136 const struct gpio_led *leds;
137 +
138 + unsigned num_btns;
139 + const struct gpio_keys_button *btns;
140 + unsigned btn_poll_interval;
141 };
142
143 #endif /* _LINUX_ATH9K_PLATFORM_H */