@@ -29,18 +29,22 @@
#define TQMX86_GPIIC 3 /* GPI Interrupt Configuration Register */
#define TQMX86_GPIIS 4 /* GPI Interrupt Status Register */
-#define TQMX86_GPII_NONE 0
-#define TQMX86_GPII_FALLING BIT(0)
-#define TQMX86_GPII_RISING BIT(1)
-/* Stored in irq_type as a trigger type, but not actually valid as a register
- * value, so the name doesn't use "GPII"
+/*
+ * NONE, FALLING and RISING use the same bit patterns that can be programmed to
+ * the GPII register (after passing them to the TQMX86_GPII_ macros to shift
+ * them to the right position)
*/
-#define TQMX86_INT_BOTH (BIT(0) | BIT(1))
-#define TQMX86_GPII_MASK (BIT(0) | BIT(1))
-#define TQMX86_GPII_BITS 2
+#define TQMX86_INT_TRIG_NONE 0
+#define TQMX86_INT_TRIG_FALLING BIT(0)
+#define TQMX86_INT_TRIG_RISING BIT(1)
+#define TQMX86_INT_TRIG_BOTH (BIT(0) | BIT(1))
+#define TQMX86_INT_TRIG_MASK (BIT(0) | BIT(1))
/* Stored in irq_type with GPII bits */
#define TQMX86_INT_UNMASKED BIT(2)
+#define TQMX86_GPIIC_CONFIG(i, v) ((v) << (2 * (i)))
+#define TQMX86_GPIIC_MASK(i) TQMX86_GPIIC_CONFIG(i, TQMX86_INT_TRIG_MASK)
+
struct tqmx86_gpio_data {
struct gpio_chip chip;
void __iomem *io_base;
@@ -115,20 +119,20 @@ static int tqmx86_gpio_get_direction(struct gpio_chip *chip,
static void tqmx86_gpio_irq_config(struct tqmx86_gpio_data *gpio, int offset)
__must_hold(&gpio->spinlock)
{
- u8 type = TQMX86_GPII_NONE, gpiic;
+ u8 type = TQMX86_INT_TRIG_NONE, gpiic;
if (gpio->irq_type[offset] & TQMX86_INT_UNMASKED) {
- type = gpio->irq_type[offset] & TQMX86_GPII_MASK;
+ type = gpio->irq_type[offset] & TQMX86_INT_TRIG_MASK;
- if (type == TQMX86_INT_BOTH)
+ if (type == TQMX86_INT_TRIG_BOTH)
type = tqmx86_gpio_get(&gpio->chip, offset + TQMX86_NGPO)
- ? TQMX86_GPII_FALLING
- : TQMX86_GPII_RISING;
+ ? TQMX86_INT_TRIG_FALLING
+ : TQMX86_INT_TRIG_RISING;
}
gpiic = tqmx86_gpio_read(gpio, TQMX86_GPIIC);
- gpiic &= ~(TQMX86_GPII_MASK << (offset * TQMX86_GPII_BITS));
- gpiic |= type << (offset * TQMX86_GPII_BITS);
+ gpiic &= ~TQMX86_GPIIC_MASK(offset);
+ gpiic |= TQMX86_GPIIC_CONFIG(offset, type);
tqmx86_gpio_write(gpio, gpiic, TQMX86_GPIIC);
}
@@ -173,20 +177,20 @@ static int tqmx86_gpio_irq_set_type(struct irq_data *data, unsigned int type)
switch (edge_type) {
case IRQ_TYPE_EDGE_RISING:
- new_type = TQMX86_GPII_RISING;
+ new_type = TQMX86_INT_TRIG_RISING;
break;
case IRQ_TYPE_EDGE_FALLING:
- new_type = TQMX86_GPII_FALLING;
+ new_type = TQMX86_INT_TRIG_FALLING;
break;
case IRQ_TYPE_EDGE_BOTH:
- new_type = TQMX86_INT_BOTH;
+ new_type = TQMX86_INT_TRIG_BOTH;
break;
default:
return -EINVAL; /* not supported */
}
raw_spin_lock_irqsave(&gpio->spinlock, flags);
- gpio->irq_type[offset] &= ~TQMX86_GPII_MASK;
+ gpio->irq_type[offset] &= ~TQMX86_INT_TRIG_MASK;
gpio->irq_type[offset] |= new_type;
tqmx86_gpio_irq_config(gpio, offset);
raw_spin_unlock_irqrestore(&gpio->spinlock, flags);
@@ -232,7 +236,7 @@ static void tqmx86_gpio_irq_handler(struct irq_desc *desc)
* reading the input and setting the trigger, we will have a new
* interrupt pending.
*/
- if ((gpio->irq_type[i] & TQMX86_GPII_MASK) == TQMX86_INT_BOTH)
+ if ((gpio->irq_type[i] & TQMX86_INT_TRIG_MASK) == TQMX86_INT_TRIG_BOTH)
tqmx86_gpio_irq_config(gpio, i);
}
raw_spin_unlock_irqrestore(&gpio->spinlock, flags);
Consistently use TQMX86_INT_* flags for irq_type values. The TQMX86_GPII_CONFIG macro is used to convert from TQMX86_INT_TRIG_* flags to GPII register values. Bit patterns for TQMX86_INT_* are chosen to make this conversion as simple as possible. No functional change intended. Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com> --- v2: - improved wording of commit description - fixed comment format drivers/gpio/gpio-tqmx86.c | 44 +++++++++++++++++++++----------------- 1 file changed, 24 insertions(+), 20 deletions(-)