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150 lines
3.8 KiB
Diff
150 lines
3.8 KiB
Diff
From: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
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Subject: [PATCH v5 5/8] mac80211: ath9k: enable GPIO buttons
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Enable platform-defined GPIO button support for ath9k device.
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Key poller is activated for attached platform buttons.
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Requires ath9k GPIO chip access.
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Signed-off-by: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/net/wireless/ath/ath9k/ath9k.h
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+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
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@@ -1024,6 +1024,7 @@ struct ath_softc {
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struct list_head leds;
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#ifdef CONFIG_GPIOLIB
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struct ath9k_gpio_chip *gpiochip;
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+ struct platform_device *btnpdev; /* gpio-keys-polled */
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#endif
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#endif
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--- a/drivers/net/wireless/ath/ath9k/gpio.c
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+++ b/drivers/net/wireless/ath/ath9k/gpio.c
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@@ -17,6 +17,8 @@
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#include "ath9k.h"
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#include <linux/ath9k_platform.h>
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#include <linux/gpio.h>
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+#include <linux/platform_device.h>
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+#include <linux/gpio_keys.h>
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#ifdef CPTCFG_MAC80211_LEDS
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@@ -132,6 +134,64 @@ static void ath9k_unregister_gpio_chip(s
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sc->gpiochip = NULL;
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}
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+/******************/
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+/* GPIO Buttons */
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+/******************/
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+
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+/* add GPIO buttons */
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+static void ath9k_init_buttons(struct ath_softc *sc)
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+{
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+ struct ath9k_platform_data *pdata = sc->dev->platform_data;
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+ struct platform_device *pdev;
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+ struct gpio_keys_platform_data gkpdata;
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+ struct gpio_keys_button *bt;
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+ int i;
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+
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+ if (!sc->gpiochip)
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+ return;
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+
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+ if (!pdata || !pdata->btns || !pdata->num_btns)
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+ return;
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+
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+ bt = devm_kmemdup(sc->dev, pdata->btns,
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+ pdata->num_btns * sizeof(struct gpio_keys_button),
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+ GFP_KERNEL);
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+ if (!bt)
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+ return;
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+
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+ for (i = 0; i < pdata->num_btns; i++) {
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+ ath9k_hw_gpio_request_in(sc->sc_ah, pdata->btns[i].gpio,
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+ "ath9k-gpio");
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+ bt[i].gpio = sc->gpiochip->gchip.base + pdata->btns[i].gpio;
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+ }
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+
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+ memset(&gkpdata, 0, sizeof(struct gpio_keys_platform_data));
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+ gkpdata.buttons = bt;
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+ gkpdata.nbuttons = pdata->num_btns;
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+ gkpdata.poll_interval = pdata->btn_poll_interval;
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+
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+ pdev = platform_device_register_data(sc->dev, "gpio-keys-polled",
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+ PLATFORM_DEVID_AUTO, &gkpdata,
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+ sizeof(gkpdata));
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+ if (!IS_ERR_OR_NULL(pdev))
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+ sc->btnpdev = pdev;
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+ else {
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+ sc->btnpdev = NULL;
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+ devm_kfree(sc->dev, bt);
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+ }
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+}
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+
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+/* remove GPIO buttons */
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+static void ath9k_deinit_buttons(struct ath_softc *sc)
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+{
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+ if (!sc->gpiochip || !sc->btnpdev)
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+ return;
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+
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+ platform_device_unregister(sc->btnpdev);
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+
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+ sc->btnpdev = NULL;
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+}
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+
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#else /* CONFIG_GPIOLIB */
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static inline void ath9k_register_gpio_chip(struct ath_softc *sc)
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@@ -142,6 +202,14 @@ static inline void ath9k_unregister_gpio
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{
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}
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+static inline void ath9k_init_buttons(struct ath_softc *sc)
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+{
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+}
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+
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+static inline void ath9k_deinit_buttons(struct ath_softc *sc)
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+{
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+}
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+
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#endif /* CONFIG_GPIOLIB */
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/********************************/
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@@ -265,6 +333,7 @@ void ath_deinit_leds(struct ath_softc *s
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{
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struct ath_led *led;
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+ ath9k_deinit_buttons(sc);
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while (!list_empty(&sc->leds)) {
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led = list_first_entry(&sc->leds, struct ath_led, list);
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#ifdef CONFIG_GPIOLIB
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@@ -296,6 +365,7 @@ void ath_init_leds(struct ath_softc *sc)
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ath_fill_led_pin(sc);
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ath9k_register_gpio_chip(sc);
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+ ath9k_init_buttons(sc);
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if (pdata && pdata->led_name)
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strncpy(led_name, pdata->led_name, sizeof(led_name));
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@@ -311,7 +381,7 @@ void ath_init_leds(struct ath_softc *sc)
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ath_create_gpio_led(sc, sc->sc_ah->led_pin, led_name, trigger,
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!sc->sc_ah->config.led_active_high);
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- if (!pdata)
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+ if (!pdata || !pdata->leds || !pdata->num_leds)
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return;
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for (i = 0; i < pdata->num_leds; i++)
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--- a/include/linux/ath9k_platform.h
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+++ b/include/linux/ath9k_platform.h
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@@ -50,6 +50,10 @@ struct ath9k_platform_data {
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int num_leds;
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const struct gpio_led *leds;
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const char *led_name;
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+
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+ unsigned num_btns;
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+ const struct gpio_keys_button *btns;
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+ unsigned btn_poll_interval;
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};
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#endif /* _LINUX_ATH9K_PLATFORM_H */
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