linux-kernel - Re: [PATCH RESEND 2/3] extcon: max77693: Request only specific interrupts

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Date:	Wed, 22 Oct 2014 18:04:14 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH RESEND 2/3] extcon: max77693: Request only specific
 interrupts

Hi Krzysztof,

The extcon-max77693.c was tested by all cables (mhl, hdmi, usb, usb-host, dock for audio play, dock for mhl).
with default_init_data register setting. If you deletes legacy default_init_data[] register setting,
extcon-max77693.c can not guarantee the operation of upper cables.

So, I want to maintain 'default_init_data' register setting value.

Thanks,
Chanwoo Choi

On 10/22/2014 05:45 PM, Krzysztof Kozlowski wrote:
> The driver was requesting all MUIC interrupts but then was masking most
> of them manually at end of probe (with default_init_data). Since
> default_init_data cannot be passed through DTS (no bindings for driver),
> this was a conflicting behavior. First get everything, then mask what we
> don't want.
> 
> This could change after adding DTS bindings for requesting specific
> MUIC interrupts. Until then driver should request only these MUIC
> interrupts which he is really interested in.
> 
> The commit does not introduce any functional change when the driver is
> used with DTS (no platform data). However this changes the behavior with
> platform data supplied. In such case the driver will request only 3
> interrupts (ADC, ADC1K, ChgTyp). Platform data could still unmask other
> interrupts but they won't be handled by the driver.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> ---
>  drivers/extcon/extcon-max77693.c | 26 --------------------------
>  1 file changed, 26 deletions(-)
> 
> diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
> index 863d088c9bdd..9d21e75a7032 100644
> --- a/drivers/extcon/extcon-max77693.c
> +++ b/drivers/extcon/extcon-max77693.c
> @@ -44,19 +44,6 @@ static struct max77693_reg_data default_init_data[] = {
>  		.addr = MAX77693_MUIC_REG_STATUS2,
>  		.data = STATUS2_CHGDETRUN_MASK,
>  	}, {
> -		/* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
> -		.addr = MAX77693_MUIC_REG_INTMASK1,
> -		.data = INTMASK1_ADC1K_MASK
> -			| INTMASK1_ADC_MASK,
> -	}, {
> -		/* INTMASK2 - Unmask [0]ChgTypM */
> -		.addr = MAX77693_MUIC_REG_INTMASK2,
> -		.data = INTMASK2_CHGTYP_MASK,
> -	}, {
> -		/* INTMASK3 - Mask all of interrupts */
> -		.addr = MAX77693_MUIC_REG_INTMASK3,
> -		.data = 0x0,
> -	}, {
>  		/* CDETCTRL2 */
>  		.addr = MAX77693_MUIC_REG_CDETCTRL2,
>  		.data = CDETCTRL2_VIDRMEN_MASK
> @@ -135,21 +122,8 @@ struct max77693_muic_irq {
>  
>  static struct max77693_muic_irq muic_irqs[] = {
>  	{ MAX77693_MUIC_IRQ_INT1_ADC,		"muic-ADC" },
> -	{ MAX77693_MUIC_IRQ_INT1_ADC_LOW,	"muic-ADCLOW" },
> -	{ MAX77693_MUIC_IRQ_INT1_ADC_ERR,	"muic-ADCError" },
>  	{ MAX77693_MUIC_IRQ_INT1_ADC1K,		"muic-ADC1K" },
>  	{ MAX77693_MUIC_IRQ_INT2_CHGTYP,	"muic-CHGTYP" },
> -	{ MAX77693_MUIC_IRQ_INT2_CHGDETREUN,	"muic-CHGDETREUN" },
> -	{ MAX77693_MUIC_IRQ_INT2_DCDTMR,	"muic-DCDTMR" },
> -	{ MAX77693_MUIC_IRQ_INT2_DXOVP,		"muic-DXOVP" },
> -	{ MAX77693_MUIC_IRQ_INT2_VBVOLT,	"muic-VBVOLT" },
> -	{ MAX77693_MUIC_IRQ_INT2_VIDRM,		"muic-VIDRM" },
> -	{ MAX77693_MUIC_IRQ_INT3_EOC,		"muic-EOC" },
> -	{ MAX77693_MUIC_IRQ_INT3_CGMBC,		"muic-CGMBC" },
> -	{ MAX77693_MUIC_IRQ_INT3_OVP,		"muic-OVP" },
> -	{ MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,	"muic-MBCCHG_ERR" },
> -	{ MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,	"muic-CHG_ENABLED" },
> -	{ MAX77693_MUIC_IRQ_INT3_BAT_DET,	"muic-BAT_DET" },
>  };
>  
>  /* Define supported accessory type */
> 

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