linux-kernel - Re: [Patch 2.6.27] fix booting on Sharp Zaurus c3000

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Date:	Mon, 27 Oct 2008 09:25:12 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Pavel Machek <pavel@...e.cz>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, linux-stable@...r.kernel.org,
	Russell King <rmk+lkml@....linux.org.uk>,
	Stanislav Brabec <utx@...guin.cz>,
	kernel list <linux-kernel@...r.kernel.org>, rpurdie@...ys.net,
	lenz@...wisc.edu, Dirk@...er-online.de, arminlitzel@....de,
	pavel.urban@...cz, metan@...ey.karlin.mff.cuni.cz,
	thommycheck@...il.com, milan@....cz
Subject: Re: [Patch 2.6.27] fix booting on Sharp Zaurus c3000

On Sun, 26 Oct 2008 19:41:09 +0100
Pavel Machek <pavel@...e.cz> wrote:

> Hi!
> 
> > > > Thanks for the effort, but it looks like it did not make it, right?
> > > 
> > > Correct - Linus was unpredictable and released 2.6.27 that evening,
> > > four days early giving me no time to push the fix to him.
> > > 
> > > However, it's gone in as part of the first ARM merge, so should be in
> > > -rc1.
> > 
> > Is it in -stable?  if not, is it considered as -stable material?
> 
> Yes, I guess it should go to stable.
> 
> commit 69fc7eed5f56bce15b239e5110de2575a6970df4
> Author: Dmitry Baryshkov <dbaryshkov@...il.com>
> Date:   Thu Oct 9 16:58:13 2008 +0100
> 
>     [ARM] 5300/1: fixup spitz reset during boot
>     
>     Some machines don't have the pullup/down on their reset
>     pin, so configuring the reset generating pin as input makes
>     them reset immediately. Fix that by making reset pin direction
>     configurable.
>     
> Signed-off-by: Dmitry Baryshkov <dbaryshkov@...il.com>
> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
> Signed-off-by: Pavel Machek <pavel@...e.cz>
> 
> diff --git a/arch/arm/mach-pxa/include/mach/reset.h b/arch/arm/mach-pxa/include/mach/reset.h
> index 9489a48..7b8842c 100644
> --- a/arch/arm/mach-pxa/include/mach/reset.h
> +++ b/arch/arm/mach-pxa/include/mach/reset.h
> @@ -10,9 +10,12 @@
>  extern unsigned int reset_status;
>  extern void clear_reset_status(unsigned int mask);
>  
> -/*
> - * register GPIO as reset generator
> +/**
> + * init_gpio_reset() - register GPIO as reset generator
> + *
> + * @gpio - gpio nr
> + * @output - set gpio as out/low instead of input during normal work

Use colon (':') after function parameters, not hyphen/dash.


>   */
> -extern int init_gpio_reset(int gpio);
> +extern int init_gpio_reset(int gpio, int output);
>  
>  #endif /* __ASM_ARCH_RESET_H */
> diff --git a/arch/arm/mach-pxa/reset.c b/arch/arm/mach-pxa/reset.c
> index 31d7885..1b2af57 100644
> --- a/arch/arm/mach-pxa/reset.c
> +++ b/arch/arm/mach-pxa/reset.c
> @@ -20,7 +20,7 @@ static void do_hw_reset(void);
>  
>  static int reset_gpio = -1;
>  
> -int init_gpio_reset(int gpio)
> +int init_gpio_reset(int gpio, int output)
>  {
>  	int rc;
>  
> @@ -30,9 +30,12 @@ int init_gpio_reset(int gpio)
>  		goto out;
>  	}
>  
> -	rc = gpio_direction_input(gpio);
> +	if (output)
> +		rc = gpio_direction_output(gpio, 0);
> +	else
> +		rc = gpio_direction_input(gpio);
>  	if (rc) {
> -		printk(KERN_ERR "Can't configure reset_gpio for input\n");
> +		printk(KERN_ERR "Can't configure reset_gpio\n");
>  		gpio_free(gpio);
>  		goto out;
>  	}
> diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
> index 9b4f24c..524f656 100644
> --- a/arch/arm/mach-pxa/spitz.c
> +++ b/arch/arm/mach-pxa/spitz.c
> @@ -618,7 +618,7 @@ static void spitz_restart(char mode)
>  
>  static void __init common_init(void)
>  {
> -	init_gpio_reset(SPITZ_GPIO_ON_RESET);
> +	init_gpio_reset(SPITZ_GPIO_ON_RESET, 1);
>  	pm_power_off = spitz_poweroff;
>  	arm_pm_restart = spitz_restart;
>  
> diff --git a/arch/arm/mach-pxa/tosa.c b/arch/arm/mach-pxa/tosa.c
> index 9f3ef9e..130e37e 100644
> --- a/arch/arm/mach-pxa/tosa.c
> +++ b/arch/arm/mach-pxa/tosa.c
> @@ -781,7 +781,7 @@ static void __init tosa_init(void)
>  	gpio_set_wake(MFP_PIN_GPIO1, 1);
>  	/* We can't pass to gpio-keys since it will drop the Reset altfunc */
>  
> -	init_gpio_reset(TOSA_GPIO_ON_RESET);
> +	init_gpio_reset(TOSA_GPIO_ON_RESET, 0);
>  
>  	pm_power_off = tosa_poweroff;
>  	arm_pm_restart = tosa_restart;
> 
> 

-- 
~Randy
--
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