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| Started by | Lee Jones <lee.jones@linaro.org> |
|---|---|
| First post | 2016-11-09 17:20 +0100 |
| Last post | 2016-11-10 05:20 +0100 |
| Articles | 2 — 2 participants |
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Re: [PATCH 2/4] mfd: palmas: Reset the POWERHOLD mux during power off Lee Jones <lee.jones@linaro.org> - 2016-11-09 17:20 +0100
Re: [PATCH 2/4] mfd: palmas: Reset the POWERHOLD mux during power off Keerthy <j-keerthy@ti.com> - 2016-11-10 05:20 +0100
| From | Lee Jones <lee.jones@linaro.org> |
|---|---|
| Date | 2016-11-09 17:20 +0100 |
| Subject | Re: [PATCH 2/4] mfd: palmas: Reset the POWERHOLD mux during power off |
| Message-ID | <sBDLs-1eq-11@gated-at.bofh.it> |
On Thu, 27 Oct 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@ti.com>
> ---
> drivers/mfd/palmas.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
> index 8f8bacb..8fbc5e0 100644
> --- a/drivers/mfd/palmas.c
> +++ b/drivers/mfd/palmas.c
> @@ -430,10 +430,28 @@ static void palmas_power_off(void)
> {
> unsigned int addr;
> int ret, slave;
> + struct device_node *node;
> + bool override_powerhold;
>
> if (!palmas_dev)
Can this happen?
> return;
>
> + node = palmas_dev->dev->of_node;
Just do:
struct device_node *np = palmas_dev->dev->of_node;
> + override_powerhold = of_property_read_bool(node,
> + "ti,palmas-override-powerhold");
Break the line after the '=' instead.
> + if (override_powerhold) {
if (of_property_read_bool(node, "ti,palmas-override-powerhold"))
Then remove '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)
> + pr_err("%s: Unable to write PALMAS_PRIMARY_SECONDARY_PAD2 %d\n",
> + __func__, ret);
Don't use __func__ in live code.
And use dev_err();
> + }
> +
> 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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| From | Keerthy <j-keerthy@ti.com> |
|---|---|
| Date | 2016-11-10 05:20 +0100 |
| Message-ID | <sBP0d-tP-3@gated-at.bofh.it> |
| In reply to | #1518283 |
On Wednesday 09 November 2016 09:44 PM, Lee Jones wrote:
> On Thu, 27 Oct 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@ti.com>
>> ---
>> drivers/mfd/palmas.c | 18 ++++++++++++++++++
>> 1 file changed, 18 insertions(+)
>>
>> diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
>> index 8f8bacb..8fbc5e0 100644
>> --- a/drivers/mfd/palmas.c
>> +++ b/drivers/mfd/palmas.c
>> @@ -430,10 +430,28 @@ static void palmas_power_off(void)
>> {
>> unsigned int addr;
>> int ret, slave;
>> + struct device_node *node;
>> + bool override_powerhold;
>>
>> if (!palmas_dev)
>
> Can this happen?
pm_power_off and palmas_dev are always assigned together. You are right
this is redundant and can be removed.
>
>> return;
>>
>> + node = palmas_dev->dev->of_node;
>
> Just do:
>
> struct device_node *np = palmas_dev->dev->of_node;
>
>> + override_powerhold = of_property_read_bool(node,
>> + "ti,palmas-override-powerhold");
>
> Break the line after the '=' instead.
okay.
>
>> + if (override_powerhold) {
>
> if (of_property_read_bool(node, "ti,palmas-override-powerhold"))
>
> Then remove 'override_powerhold'.
Okay.
>
>> + 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)
>> + pr_err("%s: Unable to write PALMAS_PRIMARY_SECONDARY_PAD2 %d\n",
>> + __func__, ret);
>
> Don't use __func__ in live code.
okay.
>
> And use dev_err();
sure.
>
>
>> + }
>> +
>> slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
>> addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_DEV_CTRL);
>>
>
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