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 15:30:38 +0530
From:   Keerthy <j-keerthy@...com>
To:     Lee Jones <lee.jones@...aro.org>
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 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.

- Keerthy

> 
>> 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);
>