linux-kernel - Re: [PATCH v3 1/2] Revert "mfd: sec-core: Prepare regulators for suspend state to reduce power-consumption"

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Message-ID: <20141021115609.GA4127@x1>
Date:	Tue, 21 Oct 2014 12:56:09 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Kukjin Kim <kgene.kim@...sung.com>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Doug Anderson <dianders@...omium.org>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Mark Brown <broonie@...nel.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 1/2] Revert "mfd: sec-core: Prepare regulators for
 suspend state to reduce power-consumption"

On Mon, 20 Oct 2014, Javier Martinez Canillas wrote:

> This reverts commit b7cde7078d2344073c310aa65fc2b0a845d2cb5b
> ("mfd: sec-core: Prepare regulators for suspend state to reduce power-consumption")
> 
> Commit b7cde7078d23 called regulator_suspend_prepare() to prepare the
> regulators for a suspend state. But it did from the device pm suspend
> handler while the regulator suspend prepare function iterates over all
> regulators and not only the one managed by this device so it doesn't
> seems to be correct to call it from within a device driver.
> 
> It is better to call the regulator suspend prepare/finish functions
> from platform code instead so this patch reverts the mentioned commit.
> 
> Suggested-by: Doug Anderson <dianders@...omium.org>
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> ---
>  drivers/mfd/Kconfig    |  1 -
>  drivers/mfd/sec-core.c | 10 ----------
>  2 files changed, 11 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 1456ea7..fd8cc4c 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -655,7 +655,6 @@ config MFD_SEC_CORE
>  	select MFD_CORE
>  	select REGMAP_I2C
>  	select REGMAP_IRQ
> -	select REGULATOR
>  	help
>  	 Support for the Samsung Electronics MFD series.
>  	 This driver provides common support for accessing the device,
> diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
> index dba7e2b..5993608 100644
> --- a/drivers/mfd/sec-core.c
> +++ b/drivers/mfd/sec-core.c
> @@ -31,7 +31,6 @@
>  #include <linux/mfd/samsung/s2mpu02.h>
>  #include <linux/mfd/samsung/s5m8763.h>
>  #include <linux/mfd/samsung/s5m8767.h>
> -#include <linux/regulator/machine.h>
>  #include <linux/regmap.h>
>  
>  static const struct mfd_cell s5m8751_devs[] = {
> @@ -432,15 +431,6 @@ static int sec_pmic_suspend(struct device *dev)
>  	 */
>  	disable_irq(sec_pmic->irq);
>  
> -	switch (sec_pmic->device_type) {
> -	case S2MPS14X:
> -	case S2MPU02:
> -		regulator_suspend_prepare(PM_SUSPEND_MEM);
> -		break;
> -	default:
> -		break;
> -	}
> -
>  	return 0;
>  }
>  

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