diff options
Diffstat (limited to 'package/kernel/mac80211/patches/ath/548-ath9k_enable_gpio_chip.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/ath/548-ath9k_enable_gpio_chip.patch | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/ath/548-ath9k_enable_gpio_chip.patch b/package/kernel/mac80211/patches/ath/548-ath9k_enable_gpio_chip.patch new file mode 100644 index 0000000000..0b76d330c6 --- /dev/null +++ b/package/kernel/mac80211/patches/ath/548-ath9k_enable_gpio_chip.patch @@ -0,0 +1,242 @@ +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> +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- +--- 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" +@@ -1001,6 +1002,14 @@ 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; +@@ -1058,6 +1067,9 @@ 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 +@@ -16,13 +16,130 @@ + + #include "ath9k.h" + #include <linux/ath9k_platform.h> ++#include <linux/gpio.h> ++ ++#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_gpio_request_in(gc->sc->sc_ah, offset, "ath9k-gpio"); ++ ++ 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_gpio_request_out(gc->sc->sc_ah, offset, "ath9k-gpio", ++ 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; ++ struct ath_hw *ah = sc->sc_ah; ++ ++ gc = kzalloc(sizeof(struct ath9k_gpio_chip), GFP_KERNEL); ++ if (!gc) ++ return; ++ ++ gc->sc = sc; ++ 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 = ah->caps.num_gpio_pins; ++ 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; ++ ++ if (gpiochip_add(&gc->gchip)) { ++ kfree(gc); ++ return; ++ } ++ ++ sc->gpiochip = gc; ++} ++ ++/* 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_fill_led_pin(struct ath_softc *sc) + { + struct ath_hw *ah = sc->sc_ah; +@@ -80,6 +197,12 @@ 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; + } + +@@ -136,17 +259,24 @@ 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); + ath9k_hw_gpio_free(sc->sc_ah, led->gpio->gpio); + kfree(led); + } ++ ath9k_unregister_gpio_chip(sc); + } + + void ath_init_leds(struct ath_softc *sc) + { + struct ath9k_platform_data *pdata = sc->dev->platform_data; ++ struct device_node *np = sc->dev->of_node; + char led_name[32]; + const char *trigger; + int i; +@@ -156,6 +286,15 @@ void ath_init_leds(struct ath_softc *sc) + if (AR_SREV_9100(sc->sc_ah)) + return; + ++ if (!np) ++ ath9k_register_gpio_chip(sc); ++ ++ /* setup gpio controller only if requested and skip the led_pin setup */ ++ if (of_property_read_bool(np, "gpio-controller")) { ++ ath9k_register_gpio_chip(sc); ++ return; ++ } ++ + ath_fill_led_pin(sc); + + if (pdata && pdata->leds && pdata->num_leds) +@@ -180,6 +319,7 @@ void ath_init_leds(struct ath_softc *sc) + ath_create_gpio_led(sc, sc->sc_ah->led_pin, led_name, trigger, + !sc->sc_ah->config.led_active_high); + } ++ + #endif + + /*******************/ |