linux-kernel - Re: arm: mach-kirkwood: Make the red led available on the eSATA SheevaPlug

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Date:	Mon, 18 Apr 2011 10:25:36 +0100
From:	Robin Becker <robin@...ortlab.com>
To:	Sean Young <sean@...s.org>
CC:	Nicolas Pitre <nico@...xnic.net>,
	Peter Korsgaard <jacmet@...site.dk>,
	linux-kernel@...r.kernel.org
Subject: Re: arm: mach-kirkwood: Make the red led available on the eSATA SheevaPlug

On 16/04/2011 23:08, Sean Young wrote:
> After this patch:
>
>          7780c80 arm: mach-kirkwood: add led in sheevaplug-setup.c
>
> On a eSATA SheevaPlug, neither the red nor the green led can be controlled,
> since probing fails with:
>
> [    6.188278] leds-gpio: probe of leds-gpio failed with error -22
>
> Signed-off-by: Sean Young<sean@...s.org>
>
> diff --git a/arch/arm/mach-kirkwood/sheevaplug-setup.c b/arch/arm/mach-kirkwood/sheevaplug-setup.c
> index 17de0bf..92db979 100644
> --- a/arch/arm/mach-kirkwood/sheevaplug-setup.c
> +++ b/arch/arm/mach-kirkwood/sheevaplug-setup.c
> @@ -94,6 +94,7 @@ static unsigned int sheevaplug_mpp_config[] __initdata = {
>   static unsigned int sheeva_esata_mpp_config[] __initdata = {
>   	MPP29_GPIO,	/* USB Power Enable */
>   	MPP44_GPIO,	/* SD Write Protect */
> +	MPP46_GPIO,	/* LED Red */
>   	MPP47_GPIO,	/* SD Card Detect */
>   	MPP49_GPIO,	/* LED Green */
>   	0
>

I think my original patch had some changes to gpio_led sheevaplug_led_pins as 
well. It definitely works on my standard sheeva plug. In fact I have three 
controllable leds at 46, 48 & 49. GPIO 45 is also an led, but is also grounded 
so is permanently on. This is something like the patch I am using with plugbox

diff --git a/arch/arm/mach-kirkwood/sheevaplug-setup.c b/arch/arm/mach-kirkwood/
index d2eec35..e14893b 100644
--- a/arch/arm/mach-kirkwood/sheevaplug-setup.c
+++ b/arch/arm/mach-kirkwood/sheevaplug-setup.c
@@ -58,7 +58,19 @@

  static struct gpio_led sheevaplug_led_pins[] = {
     {
-       .name           = "plug:green:health",
+       .name           = "status:red:misc",
+       .default_trigger    = "none",
+       .gpio           = 46,
+       .active_low     = 1,
+   },
+   {
+       .name           = "status:green:health",
+       .default_trigger    = "none",
+       .gpio           = 48,
+       .active_low     = 1,
+   },
+   {
+       .name           = "status:blue:health",
         .default_trigger    = "default-on",
         .gpio           = 49,
         .active_low     = 1,
@@ -80,7 +92,9 @@

  static unsigned int sheevaplug_mpp_config[] __initdata = {
     MPP29_GPIO, /* USB Power Enable */
-   MPP49_GPIO, /* LED */
+   MPP46_GPIO, /* LED Red Misc */
+   MPP48_GPIO, /* LED Green Health */
+   MPP49_GPIO, /* LED Blue Health */
     0
  };


-- 
Robin Becker
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