[U-Boot] [PATCH] lsxl: support power switch

[Michael Walle <michael@walle.cc>]

Am Dienstag 31 Juli 2012, 13:12:19 schrieb Prafulla Wadaskar:
> > -----Original Message-----
> > From: Michael Walle [mailto:michael at walle.cc]
> > Sent: 31 July 2012 16:22
> > To: Prafulla Wadaskar
> > Cc: Michael Walle; u-boot at lists.denx.de
> > Subject: RE: [PATCH] lsxl: support power switch
> > 
> > On Tue, July 31, 2012 07:59, Prafulla Wadaskar wrote:
> > >> -----Original Message-----
> > >> From: Michael Walle [mailto:michael at walle.cc]
> > >> Sent: 31 July 2012 02:17
> > >> To: u-boot at lists.denx.de
> > >> Cc: Michael Walle; Prafulla Wadaskar
> > >> Subject: [PATCH] lsxl: support power switch
> > >> 
> > >> This patch restores the Linkstation's original behaviour when
> > 
> > powering
> > 
> > >> off.
> > >> Once the (soft) power switch is turned off, linux will reboot and
> > 
> > the
> > 
> > >> bootloader turns off HDD and USB power. Then it loops as long as
> > 
> > the
> > 
> > >> switch
> > >> is in the off position, before continuing the boot process again.
> > >> 
> > >> Additionally, this patch fixes the board function set_led(LED_OFF).
> > >> 
> > >> Signed-off-by: Michael Walle <michael@walle.cc>
> > >> Cc: Prafulla Wadaskar <prafulla@marvell.com>
> > >> ---
> > >> 
> > >>  board/buffalo/lsxl/lsxl.c |   22 +++++++++++++++++++++-
> > >>  1 files changed, 21 insertions(+), 1 deletions(-)
> > >> 
> > >> diff --git a/board/buffalo/lsxl/lsxl.c b/board/buffalo/lsxl/lsxl.c
> > >> index fe15511..b3f31d6 100644
> > >> --- a/board/buffalo/lsxl/lsxl.c
> > >> +++ b/board/buffalo/lsxl/lsxl.c
> > >> @@ -158,7 +158,7 @@ static void set_led(int state)
> > >> 
> > >>  {
> > >>  
> > >>  	switch (state) {
> > >> 
> > >>  	case LED_OFF:
> > >> -		__set_led(0, 0, 0, 0, 0, 0);
> > >> +		__set_led(0, 0, 0, 1, 1, 1);
> > >> 
> > >>  		break;
> > >>  	
> > >>  	case LED_ALARM_ON:
> > >>  		__set_led(0, 0, 0, 0, 1, 1);
> > >> 
> > >> @@ -192,6 +192,25 @@ int board_init(void)
> > >> 
> > >>  }
> > >>  
> > >>  #ifdef CONFIG_MISC_INIT_R
> > >> 
> > >> +static void check_power_switch(void)
> > >> +{
> > >> +	if (kw_gpio_get_value(GPIO_POWER_SWITCH)) {
> > >> +		/* turn off HDD and USB power */
> > >> +		kw_gpio_set_value(GPIO_HDD_POWER, 0);
> > >> +		kw_gpio_set_value(GPIO_USB_VBUS, 0);
> > >> +		set_led(LED_OFF);
> > >> +
> > >> +		/* loop until released */
> > >> +		while (kw_gpio_get_value(GPIO_POWER_SWITCH))
> > >> +			;
> > > 
> > > Please avoid infinite loop, may you introduce timeout?
> > 
> > actually, thats the use case, to loop indefinitely ;) See the commit
> > message. The GPIO is a switch not a button. As long as it is switched
> > to
> > "Power Off" uboot should loop.
> 
> Okay got it.
> Ack for this patch.

ok thanks, can you apply it to your repository?

-- 
michael