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@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/debug.c | 6 ++++++
drivers/net/wireless/ath/ath9k/hw.c | 16 ++++++++++++++++
drivers/net/wireless/ath/ath9k/hw.h | 2 ++
3 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 9fe8693..a762cad 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -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;
}
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 338b075..b170c45 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -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);
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 6650fd4..91010e3 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -795,6 +795,8 @@ struct ath_hw {
int initPDADC;
int PDADCdelta;
u8 led_pin;
+ u32 gpio_mask;
+ u32 gpio_val;
struct ar5416IniArray iniModes;
struct ar5416IniArray iniCommon;
--
1.7.3.2
--
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