Messages in this thread | | | Date | Wed, 10 Aug 2011 07:48:19 +1000 | From | Ryan Mallon <> | Subject | Re: gpio-ep93xx: Add helper function to convert irq to gpio, port, and mask. |
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On 10/08/11 04:04, H Hartley Sweeten wrote: > This consolidates the irq_to_gpio() call and the shift magic used to convert > a GPIO irq into it's relevant GPIO, port, and mask values. > > Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> > Cc: Ryan Mallon <rmallon@gmail.com>
I think this should have my:
Signed-off-by: Ryan Mallon <rmallon@gmail.com>
Since I wrote the original patch.
Thanks, ~Ryan
> Cc: Grant Likely <grant.likely@secretlab.ca> > > --- > > diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c > index 468b27d..788c7c4 100644 > --- a/drivers/gpio/gpio-ep93xx.c > +++ b/drivers/gpio/gpio-ep93xx.c > @@ -46,6 +46,20 @@ static const u8 eoi_register_offset[3] = { 0x98, 0xb4, 0x54 }; > static const u8 int_en_register_offset[3] = { 0x9c, 0xb8, 0x58 }; > static const u8 int_debounce_register_offset[3] = { 0xa8, 0xc4, 0x64 }; > > +/* > + * Map a sw irq to it's GPIO port and mask. > + */ > +static int ep93xx_gpio_irq_to_gpio_port_mask(unsigned int irq, > + int *port, int *port_mask) > +{ > + int gpio = irq_to_gpio(irq); > + > + *port = gpio >> 3; > + *port_mask = 1 << (gpio & 7); > + > + return gpio; > +} > + > static void ep93xx_gpio_update_int_params(unsigned port) > { > BUG_ON(port > 2); > @@ -69,9 +83,9 @@ static inline void ep93xx_gpio_int_mask(unsigned line) > > static void ep93xx_gpio_int_debounce(unsigned int irq, bool enable) > { > - int line = irq_to_gpio(irq); > - int port = line >> 3; > - int port_mask = 1 << (line & 7); > + int port, port_mask; > + > + ep93xx_gpio_irq_to_gpio_port_mask(irq, &port, &port_mask); > > if (enable) > gpio_int_debounce[port] |= port_mask; > @@ -119,9 +133,9 @@ static void ep93xx_gpio_f_irq_handler(unsigned int irq, struct irq_desc *desc) > > static void ep93xx_gpio_irq_ack(struct irq_data *d) > { > - int line = irq_to_gpio(d->irq); > - int port = line >> 3; > - int port_mask = 1 << (line & 7); > + int port, port_mask; > + > + ep93xx_gpio_irq_to_gpio_port_mask(d->irq, &port, &port_mask); > > if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) { > gpio_int_type2[port] ^= port_mask; /* switch edge direction */ > @@ -133,9 +147,9 @@ static void ep93xx_gpio_irq_ack(struct irq_data *d) > > static void ep93xx_gpio_irq_mask_ack(struct irq_data *d) > { > - int line = irq_to_gpio(d->irq); > - int port = line >> 3; > - int port_mask = 1 << (line & 7); > + int port, port_mask; > + > + ep93xx_gpio_irq_to_gpio_port_mask(d->irq, &port, &port_mask); > > if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) > gpio_int_type2[port] ^= port_mask; /* switch edge direction */ > @@ -148,19 +162,21 @@ static void ep93xx_gpio_irq_mask_ack(struct irq_data *d) > > static void ep93xx_gpio_irq_mask(struct irq_data *d) > { > - int line = irq_to_gpio(d->irq); > - int port = line >> 3; > + int port, port_mask; > + > + ep93xx_gpio_irq_to_gpio_port_mask(d->irq, &port, &port_mask); > > - gpio_int_unmasked[port] &= ~(1 << (line & 7)); > + gpio_int_unmasked[port] &= ~port_mask; > ep93xx_gpio_update_int_params(port); > } > > static void ep93xx_gpio_irq_unmask(struct irq_data *d) > { > - int line = irq_to_gpio(d->irq); > - int port = line >> 3; > + int port, port_mask; > + > + ep93xx_gpio_irq_to_gpio_port_mask(d->irq, &port, &port_mask); > > - gpio_int_unmasked[port] |= 1 << (line & 7); > + gpio_int_unmasked[port] |= port_mask; > ep93xx_gpio_update_int_params(port); > } > > @@ -171,11 +187,11 @@ static void ep93xx_gpio_irq_unmask(struct irq_data *d) > */ > static int ep93xx_gpio_irq_type(struct irq_data *d, unsigned int type) > { > - const int gpio = irq_to_gpio(d->irq); > - const int port = gpio >> 3; > - const int port_mask = 1 << (gpio & 7); > + int gpio, port, port_mask; > irq_flow_handler_t handler; > > + gpio = ep93xx_gpio_irq_to_gpio_port_mask(d->irq, &port, &port_mask); > + > gpio_direction_input(gpio); > > switch (type) { > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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