* [PATCH] of/gpio: use dynamic base allocation
@ 2008-04-29 14:05 Anton Vorontsov
2008-05-19 17:28 ` Anton Vorontsov
0 siblings, 1 reply; 2+ messages in thread
From: Anton Vorontsov @ 2008-04-29 14:05 UTC (permalink / raw)
To: Paul Mackerras; +Cc: linuxppc-dev, David Miller
Since gpiolib-dynamic-gpio-number-allocation.patch -mm patch was recently
merged into Linus' tree (commit 8d0aab2f16c4fa170f32e7a74a52cd0122bbafef),
we can use dynamic GPIO base allocation now.
This, in turn, removes number of gpios per chip constraint.
Signed-off-by: Anton Vorontsov <avorontsov@ru•mvista.com>
---
drivers/of/gpio.c | 38 +-------------------------------------
1 files changed, 1 insertions(+), 37 deletions(-)
diff --git a/drivers/of/gpio.c b/drivers/of/gpio.c
index 000681e..1c9cab8 100644
--- a/drivers/of/gpio.c
+++ b/drivers/of/gpio.c
@@ -137,38 +137,6 @@ int of_gpio_simple_xlate(struct of_gpio_chip *of_gc, struct device_node *np,
}
EXPORT_SYMBOL(of_gpio_simple_xlate);
-/* Should be sufficient for now, later we'll use dynamic bases. */
-#if defined(CONFIG_PPC32) || defined(CONFIG_SPARC32)
-#define GPIOS_PER_CHIP 32
-#else
-#define GPIOS_PER_CHIP 64
-#endif
-
-static int of_get_gpiochip_base(struct device_node *np)
-{
- struct device_node *gc = NULL;
- int gpiochip_base = 0;
-
- while ((gc = of_find_all_nodes(gc))) {
- if (!of_get_property(gc, "gpio-controller", NULL))
- continue;
-
- if (gc != np) {
- gpiochip_base += GPIOS_PER_CHIP;
- continue;
- }
-
- of_node_put(gc);
-
- if (gpiochip_base >= ARCH_NR_GPIOS)
- return -ENOSPC;
-
- return gpiochip_base;
- }
-
- return -ENOENT;
-}
-
/**
* of_mm_gpiochip_add - Add memory mapped GPIO chip (bank)
* @np: device node of the GPIO chip
@@ -205,11 +173,7 @@ int of_mm_gpiochip_add(struct device_node *np,
if (!mm_gc->regs)
goto err1;
- gc->base = of_get_gpiochip_base(np);
- if (gc->base < 0) {
- ret = gc->base;
- goto err1;
- }
+ gc->base = -1;
if (!of_gc->xlate)
of_gc->xlate = of_gpio_simple_xlate;
--
1.5.5.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] of/gpio: use dynamic base allocation
2008-04-29 14:05 [PATCH] of/gpio: use dynamic base allocation Anton Vorontsov
@ 2008-05-19 17:28 ` Anton Vorontsov
0 siblings, 0 replies; 2+ messages in thread
From: Anton Vorontsov @ 2008-05-19 17:28 UTC (permalink / raw)
To: Paul Mackerras; +Cc: linuxppc-dev, David Miller
On Tue, Apr 29, 2008 at 06:05:24PM +0400, Anton Vorontsov wrote:
> Since gpiolib-dynamic-gpio-number-allocation.patch -mm patch was recently
> merged into Linus' tree (commit 8d0aab2f16c4fa170f32e7a74a52cd0122bbafef),
> we can use dynamic GPIO base allocation now.
>
> This, in turn, removes number of gpios per chip constraint.
>
> Signed-off-by: Anton Vorontsov <avorontsov@ru•mvista.com>
> ---
Paul, could you please apply this for the powerpc-next?
Thanks.
> drivers/of/gpio.c | 38 +-------------------------------------
> 1 files changed, 1 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/of/gpio.c b/drivers/of/gpio.c
> index 000681e..1c9cab8 100644
> --- a/drivers/of/gpio.c
> +++ b/drivers/of/gpio.c
> @@ -137,38 +137,6 @@ int of_gpio_simple_xlate(struct of_gpio_chip *of_gc, struct device_node *np,
> }
> EXPORT_SYMBOL(of_gpio_simple_xlate);
>
> -/* Should be sufficient for now, later we'll use dynamic bases. */
> -#if defined(CONFIG_PPC32) || defined(CONFIG_SPARC32)
> -#define GPIOS_PER_CHIP 32
> -#else
> -#define GPIOS_PER_CHIP 64
> -#endif
> -
> -static int of_get_gpiochip_base(struct device_node *np)
> -{
> - struct device_node *gc = NULL;
> - int gpiochip_base = 0;
> -
> - while ((gc = of_find_all_nodes(gc))) {
> - if (!of_get_property(gc, "gpio-controller", NULL))
> - continue;
> -
> - if (gc != np) {
> - gpiochip_base += GPIOS_PER_CHIP;
> - continue;
> - }
> -
> - of_node_put(gc);
> -
> - if (gpiochip_base >= ARCH_NR_GPIOS)
> - return -ENOSPC;
> -
> - return gpiochip_base;
> - }
> -
> - return -ENOENT;
> -}
> -
> /**
> * of_mm_gpiochip_add - Add memory mapped GPIO chip (bank)
> * @np: device node of the GPIO chip
> @@ -205,11 +173,7 @@ int of_mm_gpiochip_add(struct device_node *np,
> if (!mm_gc->regs)
> goto err1;
>
> - gc->base = of_get_gpiochip_base(np);
> - if (gc->base < 0) {
> - ret = gc->base;
> - goto err1;
> - }
> + gc->base = -1;
>
> if (!of_gc->xlate)
> of_gc->xlate = of_gpio_simple_xlate;
> --
> 1.5.5.1
--
Anton Vorontsov
email: cbouatmailru@gmail•com
irc://irc.freenode.net/bd2
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