diff options
Diffstat (limited to 'package/kernel')
| -rw-r--r-- | package/kernel/mac80211/patches/549-ath9k_enable_gpio_chip.patch | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/549-ath9k_enable_gpio_chip.patch b/package/kernel/mac80211/patches/549-ath9k_enable_gpio_chip.patch new file mode 100644 index 0000000000..beee169fbc --- /dev/null +++ b/package/kernel/mac80211/patches/549-ath9k_enable_gpio_chip.patch @@ -0,0 +1,243 @@ +From: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl> +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 <michal.cieslakiewicz@wp.pl> +--- + ath9k.h | 23 ++++++++++++ + gpio.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + init.c | 2 + + 3 files changed, 146 insertions(+) + +--- a/drivers/net/wireless/ath/ath9k/ath9k.h ++++ b/drivers/net/wireless/ath/ath9k/ath9k.h +@@ -24,6 +24,7 @@ + #include <linux/completion.h> + #include <linux/time.h> + #include <linux/hw_random.h> ++#include <linux/gpio/driver.h> + + #include "common.h" + #include "debug.h" +@@ -817,6 +818,13 @@ void ath_fill_led_pin(struct ath_softc * + int ath_create_gpio_led(struct ath_softc *sc, int gpio, const char *name, + const char *trigger, bool active_low); + ++/***************/ ++/* GPIO Chip */ ++/***************/ ++ ++void ath9k_register_gpio_chip(struct ath_softc *sc); ++void ath9k_unregister_gpio_chip(struct ath_softc *sc); ++ + #else + static inline void ath_init_leds(struct ath_softc *sc) + { +@@ -828,6 +836,14 @@ static inline void ath_deinit_leds(struc + static inline void ath_fill_led_pin(struct ath_softc *sc) + { + } ++ ++static inline void ath9k_register_gpio_chip(struct ath_softc *sc) ++{ ++} ++ ++static inline void ath9k_unregister_gpio_chip(struct ath_softc *sc) ++{ ++} + #endif + + /************************/ +@@ -963,6 +979,12 @@ struct ath_led { + struct led_classdev cdev; + }; + ++struct ath9k_gpio_chip { ++ struct ath_softc *sc; ++ char label[32]; ++ struct gpio_chip gchip; ++}; ++ + struct ath_softc { + struct ieee80211_hw *hw; + struct device *dev; +@@ -1017,6 +1039,7 @@ struct ath_softc { + #ifdef CPTCFG_MAC80211_LEDS + const char *led_default_trigger; + struct list_head leds; ++ struct ath9k_gpio_chip *gpiochip; + #endif + + #ifdef CPTCFG_ATH9K_DEBUGFS +--- a/drivers/net/wireless/ath/ath9k/gpio.c ++++ b/drivers/net/wireless/ath/ath9k/gpio.c +@@ -22,6 +22,9 @@ + /********************************/ + + #ifdef CPTCFG_MAC80211_LEDS ++ ++#include <asm-generic/gpio.h> ++ + static void ath_led_brightness(struct led_classdev *led_cdev, + enum led_brightness brightness) + { +@@ -60,6 +63,10 @@ static int ath_add_led(struct ath_softc + else + ath9k_hw_set_gpio(sc->sc_ah, gpio->gpio, gpio->active_low); + ++ /* If there is GPIO chip configured, reserve LED pin */ ++ if (sc->gpiochip) ++ gpio_request(sc->gpiochip->gchip.base + gpio->gpio, gpio->name); ++ + return 0; + } + +@@ -116,6 +123,9 @@ void ath_deinit_leds(struct ath_softc *s + + while (!list_empty(&sc->leds)) { + led = list_first_entry(&sc->leds, struct ath_led, list); ++ /* If there is GPIO chip configured, free LED pin */ ++ if (sc->gpiochip) ++ gpio_free(sc->gpiochip->gchip.base + led->gpio->gpio); + list_del(&led->list); + ath_led_brightness(&led->cdev, LED_OFF); + led_classdev_unregister(&led->cdev); +@@ -186,6 +196,117 @@ 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); + } ++ ++/***************/ ++/* 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 */ ++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 */ ++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; ++} ++ + #endif + + /*******************/ +--- a/drivers/net/wireless/ath/ath9k/init.c ++++ b/drivers/net/wireless/ath/ath9k/init.c +@@ -979,6 +979,7 @@ int ath9k_init_device(u16 devid, struct + goto debug_cleanup; + } + ++ ath9k_register_gpio_chip(sc); + ath_init_leds(sc); + ath_start_rfkill_poll(sc); + +@@ -1026,6 +1027,7 @@ void ath9k_deinit_device(struct ath_soft + + wiphy_rfkill_stop_polling(sc->hw->wiphy); + ath_deinit_leds(sc); ++ ath9k_unregister_gpio_chip(sc); + + ath9k_ps_restore(sc); + |