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From: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
Subject: [PATCH v5 5/8] mac80211: ath9k: enable GPIO buttons
Enable platform-defined GPIO button support for ath9k device.
Key poller is activated for attached platform buttons.
Requires ath9k GPIO chip access.
Signed-off-by: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -1056,6 +1056,7 @@ struct ath_softc {
struct list_head leds;
#ifdef CONFIG_GPIOLIB
struct ath9k_gpio_chip *gpiochip;
+ struct platform_device *btnpdev; /* gpio-keys-polled */
#endif
#endif
--- a/drivers/net/wireless/ath/ath9k/gpio.c
+++ b/drivers/net/wireless/ath/ath9k/gpio.c
@@ -17,6 +17,8 @@
#include "ath9k.h"
#include <linux/ath9k_platform.h>
#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/gpio_keys.h>
#ifdef CPTCFG_MAC80211_LEDS
@@ -133,6 +135,67 @@ static void ath9k_unregister_gpio_chip(s
sc->gpiochip = NULL;
}
+/******************/
+/* GPIO Buttons */
+/******************/
+
+/* add GPIO buttons */
+static void ath9k_init_buttons(struct ath_softc *sc)
+{
+ struct ath9k_platform_data *pdata = sc->dev->platform_data;
+ struct platform_device *pdev;
+ struct gpio_keys_platform_data gkpdata;
+ struct gpio_keys_button *bt;
+ int i;
+
+ if (!sc->gpiochip)
+ return;
+
+ if (!pdata || !pdata->btns || !pdata->num_btns)
+ return;
+
+ bt = devm_kmemdup(sc->dev, pdata->btns,
+ pdata->num_btns * sizeof(struct gpio_keys_button),
+ GFP_KERNEL);
+ if (!bt)
+ return;
+
+ for (i = 0; i < pdata->num_btns; i++) {
+ if (pdata->btns[i].gpio == sc->sc_ah->led_pin)
+ sc->sc_ah->led_pin = -1;
+
+ ath9k_hw_gpio_request_in(sc->sc_ah, pdata->btns[i].gpio,
+ "ath9k-gpio");
+ bt[i].gpio = sc->gpiochip->gchip.base + pdata->btns[i].gpio;
+ }
+
+ memset(&gkpdata, 0, sizeof(struct gpio_keys_platform_data));
+ gkpdata.buttons = bt;
+ gkpdata.nbuttons = pdata->num_btns;
+ gkpdata.poll_interval = pdata->btn_poll_interval;
+
+ pdev = platform_device_register_data(sc->dev, "gpio-keys-polled",
+ PLATFORM_DEVID_AUTO, &gkpdata,
+ sizeof(gkpdata));
+ if (!IS_ERR_OR_NULL(pdev))
+ sc->btnpdev = pdev;
+ else {
+ sc->btnpdev = NULL;
+ devm_kfree(sc->dev, bt);
+ }
+}
+
+/* remove GPIO buttons */
+static void ath9k_deinit_buttons(struct ath_softc *sc)
+{
+ if (!sc->gpiochip || !sc->btnpdev)
+ return;
+
+ platform_device_unregister(sc->btnpdev);
+
+ sc->btnpdev = NULL;
+}
+
#else /* CONFIG_GPIOLIB */
static inline void ath9k_register_gpio_chip(struct ath_softc *sc)
@@ -143,6 +206,14 @@ static inline void ath9k_unregister_gpio
{
}
+static inline void ath9k_init_buttons(struct ath_softc *sc)
+{
+}
+
+static inline void ath9k_deinit_buttons(struct ath_softc *sc)
+{
+}
+
#endif /* CONFIG_GPIOLIB */
/********************************/
@@ -266,6 +337,7 @@ void ath_deinit_leds(struct ath_softc *s
{
struct ath_led *led;
+ ath9k_deinit_buttons(sc);
while (!list_empty(&sc->leds)) {
led = list_first_entry(&sc->leds, struct ath_led, list);
#ifdef CONFIG_GPIOLIB
@@ -305,6 +377,7 @@ void ath_init_leds(struct ath_softc *sc)
}
ath_fill_led_pin(sc);
+ ath9k_init_buttons(sc);
if (pdata && pdata->leds && pdata->num_leds)
for (i = 0; i < pdata->num_leds; i++) {
--- a/include/linux/ath9k_platform.h
+++ b/include/linux/ath9k_platform.h
@@ -49,6 +49,10 @@ struct ath9k_platform_data {
int num_leds;
const struct gpio_led *leds;
+
+ unsigned num_btns;
+ const struct gpio_keys_button *btns;
+ unsigned btn_poll_interval;
};
#endif /* _LINUX_ATH9K_PLATFORM_H */
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