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Commit 691680b8 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville
Browse files

ath9k: add an interface for overriding the value of specific GPIO pins 



Some devices control antenna settings or other things through GPIO pins
of the wireless interface. Add a debugfs interface for changing those
and keeping them set across card resets.

Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent c70cab1a

drivers/net/wireless/ath/ath9k/debug.c

+6 −0
Original line number Diff line number Diff line
@@ -1119,6 +1119,12 @@ int ath9k_init_debug(struct ath_hw *ah) 
	debugfs_create_file("regdump", S_IRUSR, sc->debug.debugfs_phy, sc,

			    &fops_regdump);



	debugfs_create_u32("gpio_mask", S_IRUSR | S_IWUSR,

			   sc->debug.debugfs_phy, &sc->sc_ah->gpio_mask);



	debugfs_create_u32("gpio_val", S_IRUSR | S_IWUSR,

			   sc->debug.debugfs_phy, &sc->sc_ah->gpio_val);



	sc->debug.regidx = 0;

	return 0;

}

drivers/net/wireless/ath/ath9k/hw.c

+16 −0
Original line number Diff line number Diff line
@@ -1212,6 +1212,20 @@ static bool ath9k_hw_channel_change(struct ath_hw *ah, 
	return true;

}



static void ath9k_hw_apply_gpio_override(struct ath_hw *ah)

{

	u32 gpio_mask = ah->gpio_mask;

	int i;



	for (i = 0; gpio_mask; i++, gpio_mask >>= 1) {

		if (!(gpio_mask & 1))

			continue;



		ath9k_hw_cfg_output(ah, i, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);

		ath9k_hw_set_gpio(ah, i, !!(ah->gpio_val & BIT(i)));

	}

}



bool ath9k_hw_check_alive(struct ath_hw *ah)

{

	int count = 50;
@@ -1500,6 +1514,8 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, 
	if (AR_SREV_9300_20_OR_LATER(ah))

		ar9003_hw_bb_watchdog_config(ah);



	ath9k_hw_apply_gpio_override(ah);



	return 0;

}

EXPORT_SYMBOL(ath9k_hw_reset);

drivers/net/wireless/ath/ath9k/hw.h

+2 −0
Original line number Diff line number Diff line
@@ -799,6 +799,8 @@ struct ath_hw { 
	int initPDADC;

	int PDADCdelta;

	u8 led_pin;

	u32 gpio_mask;

	u32 gpio_val;



	struct ar5416IniArray iniModes;

	struct ar5416IniArray iniCommon;