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gpio: avoid disabling interrupts when supporting legacy code

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gpio_pin_interrupt_configure() is invoked from within
gpio_pin_configure() to support legacy code that combines pin and
interrupt configuration.  Expressing a disabled interrupt by a zero
value for interrupt flags causes this invocation to disable interrupts
when the intent is to change only a pin configuration, such as pull
direction.

Support a distinction between explicitly disabling interrupts and
leaving the interrupt configuration unchanged.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This commit is contained in:
Peter Bigot 2019-10-02 11:58:22 -05:00 • committed by Carles Cufí
commit 2b150bff4f
2 changed files with 21 additions and 13 deletions
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30
include/drivers/gpio.h
View file

@ -76,19 +76,19 @@ extern "C" {
*/
/** Disables GPIO pin interrupt. */
#define GPIO_INT_DISABLE (0U << 12)
#define GPIO_INT_DISABLE (1U << 12)
/** @cond INTERNAL_HIDDEN */
/* Enables GPIO pin interrupt. */
#define GPIO_INT_ENABLE (1U << 12)
#define GPIO_INT_ENABLE (1U << 13)
/* GPIO interrupt is sensitive to logical levels.
*
* This is a component flag that should be combined with other
* `GPIO_INT_*` flags to produce a meaningful configuration.
*/
#define GPIO_INT_LEVELS_LOGICAL (1U << 13)
#define GPIO_INT_LEVELS_LOGICAL (1U << 14)
/* GPIO interrupt is edge sensitive.
*
@ -97,7 +97,7 @@ extern "C" {
* This is a component flag that should be combined with other
* `GPIO_INT_*` flags to produce a meaningful configuration.
*/
#define GPIO_INT_EDGE (1U << 14)
#define GPIO_INT_EDGE (1U << 15)
/* Trigger detection when input state is (or transitions to) physical low or
* logical 0 level.
@ -105,7 +105,7 @@ extern "C" {
* This is a component flag that should be combined with other
* `GPIO_INT_*` flags to produce a meaningful configuration.
*/
#define GPIO_INT_LOW_0 (1U << 15)
#define GPIO_INT_LOW_0 (1U << 16)
/* Trigger detection on input state is (or transitions to) physical high or
* logical 1 level.
@ -113,7 +113,7 @@ extern "C" {
* This is a component flag that should be combined with other
* `GPIO_INT_*` flags to produce a meaningful configuration.
*/
#define GPIO_INT_HIGH_1 (1U << 16)
#define GPIO_INT_HIGH_1 (1U << 17)
/** @endcond */
@ -187,7 +187,7 @@ extern "C" {
* @note Drivers that do not support a debounce feature should ignore
* this flag rather than rejecting the configuration with -ENOTSUP.
*/
#define GPIO_INT_DEBOUNCE (1U << 17)
#define GPIO_INT_DEBOUNCE (1U << 18)
/**
* @name GPIO drive strength flags
@ -212,7 +212,7 @@ extern "C" {
* @{
*/
/** @cond INTERNAL_HIDDEN */
#define GPIO_DS_LOW_POS 18
#define GPIO_DS_LOW_POS 19
#define GPIO_DS_LOW_MASK (0x3U << GPIO_DS_LOW_POS)
/** @endcond */
@ -227,7 +227,7 @@ extern "C" {
#define GPIO_DS_ALT_LOW (0x1U << GPIO_DS_LOW_POS)
/** @cond INTERNAL_HIDDEN */
#define GPIO_DS_HIGH_POS 20
#define GPIO_DS_HIGH_POS 21
#define GPIO_DS_HIGH_MASK (0x3U << GPIO_DS_HIGH_POS)
/** @endcond */
@ -611,6 +611,13 @@ static inline int z_impl_gpio_pin_interrupt_configure(struct device *port,
__ASSERT_NO_MSG((flags & GPIO_INT_DEBOUNCE) == 0);
__ASSERT((flags & (GPIO_INT_DISABLE | GPIO_INT_ENABLE))
!= (GPIO_INT_DISABLE | GPIO_INT_ENABLE),
"Cannot both enable and disable interrupts");
__ASSERT((flags & (GPIO_INT_DISABLE | GPIO_INT_ENABLE)) != 0U,
"Must either enable or disable interrupts");
__ASSERT(((flags & GPIO_INT_ENABLE) == 0) ||
((flags & GPIO_INT_EDGE) != 0) ||
((flags & (GPIO_INT_LOW_0 | GPIO_INT_HIGH_1)) !=
@ -630,7 +637,7 @@ static inline int z_impl_gpio_pin_interrupt_configure(struct device *port,
}
trig = (enum gpio_int_trig)(flags & (GPIO_INT_LOW_0 | GPIO_INT_HIGH_1));
mode = (enum gpio_int_mode)(flags & (GPIO_INT_EDGE | GPIO_INT_ENABLE));
mode = (enum gpio_int_mode)(flags & (GPIO_INT_EDGE | GPIO_INT_DISABLE | GPIO_INT_ENABLE));
return api->pin_interrupt_configure(port, pin, mode, trig);
}
@ -687,7 +694,8 @@ static inline int gpio_pin_configure(struct device *port, u32_t pin,
} else {
data->invert &= ~BIT(pin);
}
if (api->pin_interrupt_configure) {
if (((flags & (GPIO_INT_DISABLE | GPIO_INT_ENABLE)) != 0U)
&& (api->pin_interrupt_configure != NULL)) {
flags &= ~GPIO_INT_DEBOUNCE;
ret = z_impl_gpio_pin_interrupt_configure(port, pin, flags);
}

4
include/dt-bindings/gpio/gpio.h
View file

@ -84,8 +84,8 @@
#define GPIO_DIR_OUT (1 << 9) /* GPIO_OUTPUT */
#define GPIO_PUD_PULL_UP GPIO_PULL_UP
#define GPIO_PUD_PULL_DOWN GPIO_PULL_DOWN
#define GPIO_INT_ACTIVE_LOW (1 << 15) /* GPIO_INT_LOW_0 */
#define GPIO_INT_ACTIVE_HIGH (1 << 16) /* GPIO_INT_HIGH_1 */
#define GPIO_INT_ACTIVE_LOW (1 << 16) /* GPIO_INT_LOW_0 */
#define GPIO_INT_ACTIVE_HIGH (1 << 17) /* GPIO_INT_HIGH_1 */
/** @endcond */
/**