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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: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2011-03-19 13:55:38 +01:00 committed by John W. Linville
parent c70cab1a45
commit 691680b833
3 changed files with 24 additions and 0 deletions
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6
drivers/net/wireless/ath/ath9k/debug.c
View File

@ -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;
}

16
drivers/net/wireless/ath/ath9k/hw.c
View File

@ -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);

2
drivers/net/wireless/ath/ath9k/hw.h
View File

@ -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;