From 2cfd943fe9074c3bfd1c293222d7de381e2f1576 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Mon, 7 Mar 2016 09:20:22 +0000 Subject: mac80211: rework gpio chip/button support to build on platforms without CONFIG_GPIOLIB Signed-off-by: Felix Fietkau SVN-Revision: 48938 --- .../patches/548-ath9k_enable_gpio_chip.patch | 235 +++++++++++++++++++++ 1 file changed, 235 insertions(+) create mode 100644 package/kernel/mac80211/patches/548-ath9k_enable_gpio_chip.patch (limited to 'package/kernel/mac80211/patches/548-ath9k_enable_gpio_chip.patch') diff --git a/package/kernel/mac80211/patches/548-ath9k_enable_gpio_chip.patch b/package/kernel/mac80211/patches/548-ath9k_enable_gpio_chip.patch new file mode 100644 index 0000000000..f91d85c6f8 --- /dev/null +++ b/package/kernel/mac80211/patches/548-ath9k_enable_gpio_chip.patch @@ -0,0 +1,235 @@ +From: Michal Cieslakiewicz +Date: Sun, 31 Jan 2016 21:01:31 +0100 +Subject: [PATCH v4 4/8] mac80211: ath9k: enable access to GPIO + +Enable access to GPIO chip and its pins for Atheros AR92xx +wireless devices. For now AR9285 and AR9287 are supported. + +Signed-off-by: Michal Cieslakiewicz +Signed-off-by: Felix Fietkau +--- +--- a/drivers/net/wireless/ath/ath9k/ath9k.h ++++ b/drivers/net/wireless/ath/ath9k/ath9k.h +@@ -24,6 +24,7 @@ + #include + #include + #include ++#include + + #include "common.h" + #include "debug.h" +@@ -963,6 +964,14 @@ struct ath_led { + struct led_classdev cdev; + }; + ++#ifdef CONFIG_GPIOLIB ++struct ath9k_gpio_chip { ++ struct ath_softc *sc; ++ char label[32]; ++ struct gpio_chip gchip; ++}; ++#endif ++ + struct ath_softc { + struct ieee80211_hw *hw; + struct device *dev; +@@ -1017,6 +1026,9 @@ struct ath_softc { + #ifdef CPTCFG_MAC80211_LEDS + const char *led_default_trigger; + struct list_head leds; ++#ifdef CONFIG_GPIOLIB ++ struct ath9k_gpio_chip *gpiochip; ++#endif + #endif + + #ifdef CPTCFG_ATH9K_DEBUGFS +--- a/drivers/net/wireless/ath/ath9k/gpio.c ++++ b/drivers/net/wireless/ath/ath9k/gpio.c +@@ -16,12 +16,138 @@ + + #include "ath9k.h" + #include ++#include ++ ++#ifdef CPTCFG_MAC80211_LEDS ++ ++#ifdef CONFIG_GPIOLIB ++ ++/***************/ ++/* GPIO Chip */ ++/***************/ ++ ++/* gpio_chip handler : set GPIO to input */ ++static int ath9k_gpio_pin_cfg_input(struct gpio_chip *chip, unsigned offset) ++{ ++ struct ath9k_gpio_chip *gc = container_of(chip, struct ath9k_gpio_chip, ++ gchip); ++ ++ ath9k_hw_cfg_gpio_input(gc->sc->sc_ah, offset); ++ ++ return 0; ++} ++ ++/* gpio_chip handler : set GPIO to output */ ++static int ath9k_gpio_pin_cfg_output(struct gpio_chip *chip, unsigned offset, ++ int value) ++{ ++ struct ath9k_gpio_chip *gc = container_of(chip, struct ath9k_gpio_chip, ++ gchip); ++ ++ ath9k_hw_cfg_output(gc->sc->sc_ah, offset, ++ AR_GPIO_OUTPUT_MUX_AS_OUTPUT); ++ ath9k_hw_set_gpio(gc->sc->sc_ah, offset, value); ++ ++ return 0; ++} ++ ++/* gpio_chip handler : query GPIO direction (0=out, 1=in) */ ++static int ath9k_gpio_pin_get_dir(struct gpio_chip *chip, unsigned offset) ++{ ++ struct ath9k_gpio_chip *gc = container_of(chip, struct ath9k_gpio_chip, ++ gchip); ++ struct ath_hw *ah = gc->sc->sc_ah; ++ ++ return !((REG_READ(ah, AR_GPIO_OE_OUT) >> (offset * 2)) & 3); ++} ++ ++/* gpio_chip handler : get GPIO pin value */ ++static int ath9k_gpio_pin_get(struct gpio_chip *chip, unsigned offset) ++{ ++ struct ath9k_gpio_chip *gc = container_of(chip, struct ath9k_gpio_chip, ++ gchip); ++ ++ return ath9k_hw_gpio_get(gc->sc->sc_ah, offset); ++} ++ ++/* gpio_chip handler : set GPIO pin to value */ ++static void ath9k_gpio_pin_set(struct gpio_chip *chip, unsigned offset, ++ int value) ++{ ++ struct ath9k_gpio_chip *gc = container_of(chip, struct ath9k_gpio_chip, ++ gchip); ++ ++ ath9k_hw_set_gpio(gc->sc->sc_ah, offset, value); ++} ++ ++/* register GPIO chip */ ++static void ath9k_register_gpio_chip(struct ath_softc *sc) ++{ ++ struct ath9k_gpio_chip *gc; ++ u16 ng; ++ ++ /* for now only AR9285 and AR9287 are recognized */ ++ if (AR_SREV_9287(sc->sc_ah)) ++ ng = AR9287_NUM_GPIO; ++ else if (AR_SREV_9285(sc->sc_ah)) ++ ng = AR9285_NUM_GPIO; ++ else ++ return; ++ ++ gc = kzalloc(sizeof(struct ath9k_gpio_chip), GFP_KERNEL); ++ if (!gc) ++ return; ++ ++ snprintf(gc->label, sizeof(gc->label), "ath9k-%s", ++ wiphy_name(sc->hw->wiphy)); ++ gc->gchip.label = gc->label; ++ gc->gchip.base = -1; /* determine base automatically */ ++ gc->gchip.ngpio = ng; ++ gc->gchip.direction_input = ath9k_gpio_pin_cfg_input; ++ gc->gchip.direction_output = ath9k_gpio_pin_cfg_output; ++ gc->gchip.get_direction = ath9k_gpio_pin_get_dir; ++ gc->gchip.get = ath9k_gpio_pin_get; ++ gc->gchip.set = ath9k_gpio_pin_set; ++ gc->gchip.owner = THIS_MODULE; ++ ++ if (gpiochip_add(&gc->gchip)) { ++ kfree(gc); ++ return; ++ } ++ ++ sc->gpiochip = gc; ++ gc->sc = sc; ++} ++ ++/* remove GPIO chip */ ++static void ath9k_unregister_gpio_chip(struct ath_softc *sc) ++{ ++ struct ath9k_gpio_chip *gc = sc->gpiochip; ++ ++ if (!gc) ++ return; ++ ++ gpiochip_remove(&gc->gchip); ++ kfree(gc); ++ sc->gpiochip = NULL; ++} ++ ++#else /* CONFIG_GPIOLIB */ ++ ++static inline void ath9k_register_gpio_chip(struct ath_softc *sc) ++{ ++} ++ ++static inline void ath9k_unregister_gpio_chip(struct ath_softc *sc) ++{ ++} ++ ++#endif /* CONFIG_GPIOLIB */ + + /********************************/ + /* LED functions */ + /********************************/ + +-#ifdef CPTCFG_MAC80211_LEDS + static void ath_led_brightness(struct led_classdev *led_cdev, + enum led_brightness brightness) + { +@@ -60,6 +186,12 @@ static int ath_add_led(struct ath_softc + else + ath9k_hw_set_gpio(sc->sc_ah, gpio->gpio, gpio->active_low); + ++#ifdef CONFIG_GPIOLIB ++ /* If there is GPIO chip configured, reserve LED pin */ ++ if (sc->gpiochip) ++ gpio_request(sc->gpiochip->gchip.base + gpio->gpio, gpio->name); ++#endif ++ + return 0; + } + +@@ -116,11 +248,17 @@ void ath_deinit_leds(struct ath_softc *s + + while (!list_empty(&sc->leds)) { + led = list_first_entry(&sc->leds, struct ath_led, list); ++#ifdef CONFIG_GPIOLIB ++ /* If there is GPIO chip configured, free LED pin */ ++ if (sc->gpiochip) ++ gpio_free(sc->gpiochip->gchip.base + led->gpio->gpio); ++#endif + list_del(&led->list); + ath_led_brightness(&led->cdev, LED_OFF); + led_classdev_unregister(&led->cdev); + kfree(led); + } ++ ath9k_unregister_gpio_chip(sc); + } + + void ath_init_leds(struct ath_softc *sc) +@@ -135,6 +273,8 @@ void ath_init_leds(struct ath_softc *sc) + if (AR_SREV_9100(sc->sc_ah)) + return; + ++ ath9k_register_gpio_chip(sc); ++ + if (pdata && pdata->led_name) + strncpy(led_name, pdata->led_name, sizeof(led_name)); + else +@@ -186,6 +326,7 @@ void ath_fill_led_pin(struct ath_softc * + /* LED off, active low */ + ath9k_hw_set_gpio(ah, ah->led_pin, (ah->config.led_active_high) ? 0 : 1); + } ++ + #endif + + /*******************/ -- cgit v1.2.3