コード例 #1
0
/**
 * ath5k_hw_set_gpio_intr() - Initialize the GPIO interrupt (RFKill switch)
 * @ah: The &struct ath5k_hw
 * @gpio: The GPIO pin to use
 * @interrupt_level: True to generate interrupt on active pin (high)
 *
 * This function is used to set up the GPIO interrupt for the hw RFKill switch.
 * That switch is connected to a GPIO pin and it's number is stored on EEPROM.
 * It can either open or close the circuit to indicate that we should disable
 * RF/Wireless to save power (we also get that from EEPROM).
 */
void
ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio,
		u32 interrupt_level)
{
	u32 data;

	if (gpio >= AR5K_NUM_GPIO)
		return;

	/*
	 * Set the GPIO interrupt
	 */
	data = (ath5k_hw_reg_read(ah, AR5K_GPIOCR) &
		~(AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_SELH |
		AR5K_GPIOCR_INT_ENA | AR5K_GPIOCR_OUT(gpio))) |
		(AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_ENA);

	ath5k_hw_reg_write(ah, interrupt_level ? data :
		(data | AR5K_GPIOCR_INT_SELH), AR5K_GPIOCR);

	ah->ah_imr |= AR5K_IMR_GPIO;

	/* Enable GPIO interrupts */
	AR5K_REG_ENABLE_BITS(ah, AR5K_PIMR, AR5K_IMR_GPIO);
}
コード例 #2
0
ファイル: ath5k_gpio.c プロジェクト: 3a9LL/panda
/*
 * Set GPIO outputs
 */
int ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio)
{
	if (gpio >= AR5K_NUM_GPIO)
		return -EINVAL;

	ath5k_hw_reg_write(ah,
		(ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))
		| AR5K_GPIOCR_OUT(gpio), AR5K_GPIOCR);

	return 0;
}