linux-kernel - Re: [PATCH v2 3/5] mfd: palmas: Reset the POWERHOLD mux during power off

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Date:   Fri, 24 Mar 2017 11:30:14 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Keerthy <j-keerthy@...com>
Cc:     tony@...mide.com, robh+dt@...nel.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-gpio@...r.kernel.org, nm@...com, t-kristo@...com
Subject: Re: [PATCH v2 3/5] mfd: palmas: Reset the POWERHOLD mux during power
 off

On Fri, 24 Mar 2017, Keerthy wrote:

> 
> 
> On Tuesday 22 November 2016 06:33 PM, Lee Jones wrote:
> > On Thu, 10 Nov 2016, Keerthy wrote:
> > 
> >> POWERHOLD signal has higher priority  over the DEV_ON bit.
> >> So power off will not happen if the POWERHOLD is held high.
> >> Hence reset the MUX to GPIO_7 mode to release the POWERHOLD
> >> and the DEV_ON bit to take effect to power off the PMIC.
> >>
> >> PMIC Power off happens in dire situations like thermal shutdown
> >> so irrespective of the POWERHOLD setting go ahead and turn off
> >> the powerhold.  Currently poweroff is broken on boards that have
> >> powerhold enabled. This fixes poweroff on those boards.
> >>
> >> Signed-off-by: Keerthy <j-keerthy@...com>
> >> ---
> >>
> >> Changes in v2:
> >>
> >>   * Changed pr_err to dev_err
> >>   * removed redundant boolean variable override-powerhold
> >>
> >>  drivers/mfd/palmas.c | 14 ++++++++++++++
> >>  1 file changed, 14 insertions(+)
> > 
> > Applied, thanks.
> 
> Lee Jones,
> 
> For some strange reason this patch is missing!
> The other patch in the series is applied through mfd tree but somehow
> this particular patch is missed out.
> 
> https://patchwork.kernel.org/patch/9420631/ is applied.
> 
> https://patchwork.kernel.org/patch/9420655/ is not.
> 
> I tried applying this very patch and it applies cleanly on the next
> branch. Let me know if you want me to send this again on top of latest
> next branch.

Sorry about this.

Reapplied and re-pushed.

> >> diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
> >> index ee9e9ea..da90124 100644
> >> --- a/drivers/mfd/palmas.c
> >> +++ b/drivers/mfd/palmas.c
> >> @@ -430,6 +430,20 @@ static void palmas_power_off(void)
> >>  {
> >>  	unsigned int addr;
> >>  	int ret, slave;
> >> +	struct device_node *np = palmas_dev->dev->of_node;
> >> +
> >> +	if (of_property_read_bool(np, "ti,palmas-override-powerhold")) {
> >> +		addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,
> >> +					  PALMAS_PRIMARY_SECONDARY_PAD2);
> >> +		slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);
> >> +
> >> +		ret = regmap_update_bits(palmas_dev->regmap[slave], addr,
> >> +				PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK, 0);
> >> +		if (ret)
> >> +			dev_err(palmas_dev->dev,
> >> +				"Unable to write PRIMARY_SECONDARY_PAD2 %d\n",
> >> +				ret);
> >> +	}
> >>  
> >>  	slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
> >>  	addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_DEV_CTRL);
> > 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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