On Mon, Jun 16, 2014 at 10:51 PM, Rojhalat Ibrahim <[email protected]> wrote: > Add a set_multiple function to the MPC8xxx GPIO chip driver and thereby allow > for actual performance improvements when setting multiple outputs > simultaneously. In my case the time needed to configure an FPGA goes down from > 48 s to 20 s. > > Signed-off-by: Rojhalat Ibrahim <[email protected]>
IIRC I gave you my reviewed-by on the v4 of this patch. Don't forget to carry the tags you received to the following revisions, otherwise the maintainer will have to go through the history of your series to see who approves your patches. Just so Linus don't miss it: Reviewed-by: Alexandre Courbot <[email protected]> > --- > This patch depends on my previous patch "gpiolib: allow simultaneous setting > of multiple GPIO outputs". > > Change log: > v5: - no change > v4: - change interface of the set_multiple driver function to use > unsigned long as type for the bit fields > - use generic bitops (which also use unsigned long for bit fields) > v3: - change commit message > v2: - add this patch (v1 included only changes to gpiolib) > > drivers/gpio/gpio-mpc8xxx.c | 27 +++++++++++++++++++++++++++ > 1 file changed, 27 insertions(+) > > diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c > index d7d6d72..d1ff879 100644 > --- a/drivers/gpio/gpio-mpc8xxx.c > +++ b/drivers/gpio/gpio-mpc8xxx.c > @@ -105,6 +105,32 @@ static void mpc8xxx_gpio_set(struct gpio_chip *gc, > unsigned int gpio, int val) > spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); > } > > +static void mpc8xxx_gpio_set_multiple(struct gpio_chip *gc, > + unsigned long *mask, unsigned long > *bits) > +{ > + struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc); > + struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm); > + unsigned long flags; > + int i; > + > + spin_lock_irqsave(&mpc8xxx_gc->lock, flags); > + > + for (i = 0; i < gc->ngpio; i++) { > + if (*mask == 0) > + break; > + if (__test_and_clear_bit(i, mask)) { > + if (test_bit(i, bits)) > + mpc8xxx_gc->data |= mpc8xxx_gpio2mask(i); > + else > + mpc8xxx_gc->data &= ~mpc8xxx_gpio2mask(i); > + } > + } > + > + out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data); > + > + spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags); > +} > + > static int mpc8xxx_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio) > { > struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc); > @@ -344,6 +370,7 @@ static void __init mpc8xxx_add_controller(struct > device_node *np) > gc->get = of_device_is_compatible(np, "fsl,mpc8572-gpio") ? > mpc8572_gpio_get : mpc8xxx_gpio_get; > gc->set = mpc8xxx_gpio_set; > + gc->set_multiple = mpc8xxx_gpio_set_multiple; > gc->to_irq = mpc8xxx_gpio_to_irq; > > ret = of_mm_gpiochip_add(np, mm_gc); > > -- > 1.8.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
