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Re: [PATCH V1] mfd: da9062: fix missing volatile registers in the core regmap_range volatile lists

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  Re: [PATCH V1] mfd: da9062: fix missing volatile registers in the  core regmap_range volatile lists Lee Jones <lee.jones@linaro.org> - 2016-02-10 18:00 +0100
    RE: [PATCH V1] mfd: da9062: fix missing volatile registers in the  core regmap_range volatile lists "Opensource [Steve Twiss]" <stwiss.opensource@diasemi.com> - 2016-02-10 18:10 +0100
      Re: [PATCH V1] mfd: da9062: fix missing volatile registers in the  core regmap_range volatile lists Lee Jones <lee.jones@linaro.org> - 2016-02-11 10:20 +0100

#1331327 — Re: [PATCH V1] mfd: da9062: fix missing volatile registers in the core regmap_range volatile lists

On Mon, 01 Feb 2016, Steve Twiss wrote:

> From: Steve Twiss <stwiss.opensource@diasemi.com>
> 
> Add an updated set of registers listed in the core regmap_range volatile
> ranges defined for the DA9062.
> 
> These new registers contain bits that cannot be considered under the full
> control of software. Under various conditions the hardware will set and/or
> automatically clear bit(s) contained in these registers.
> 
> When using a cached version of regmap, the volatility of these registers must
> be identified otherwise the regmap operations may not ensure the registers
> are explicitly altered.
> 
> As well as updating the list of volatile registers, this change will fix a
> corner case discovered in the DA9063 ONKEY which is used by the DA9062 core.
>  
> In the ONKEY case, the CONTROL_B register is now listed as volatile in the
> regmap_range because it contains the bit field NONKEY_LOCK. This bit can be
> altered by hardware, in which case regmap must be notified of its ability
> to be manpiulated outside of software control.
> 
> Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>

Applied, thanks.

> ---
> Checks performed with linux-next/v4.5-rc1/scripts/checkpatch.pl
>  da9062-core.c             total: 0 errors, 0 warnings, 554 lines checked
> This patch applies against linux-next and v4.5-rc1
> 
> Regards,
> Steve
> 
> 
>  drivers/mfd/da9062-core.c | 23 ++++++++++++++++++++++-
>  1 file changed, 22 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mfd/da9062-core.c b/drivers/mfd/da9062-core.c
> index a9ad024..8f873866 100644
> --- a/drivers/mfd/da9062-core.c
> +++ b/drivers/mfd/da9062-core.c
> @@ -388,11 +388,32 @@ static const struct regmap_range da9062_aa_volatile_ranges[] = {
>  		.range_min = DA9062AA_STATUS_D,
>  		.range_max = DA9062AA_EVENT_C,
>  	}, {
> -		.range_min = DA9062AA_CONTROL_F,
> +		.range_min = DA9062AA_CONTROL_A,
> +		.range_max = DA9062AA_CONTROL_B,
> +	}, {
> +		.range_min = DA9062AA_CONTROL_E,
>  		.range_max = DA9062AA_CONTROL_F,
>  	}, {
> +		.range_min = DA9062AA_BUCK2_CONT,
> +		.range_max = DA9062AA_BUCK4_CONT,
> +	}, {
> +		.range_min = DA9062AA_BUCK3_CONT,
> +		.range_max = DA9062AA_BUCK3_CONT,
> +	}, {
> +		.range_min = DA9062AA_LDO1_CONT,
> +		.range_max = DA9062AA_LDO4_CONT,
> +	}, {
> +		.range_min = DA9062AA_DVC_1,
> +		.range_max = DA9062AA_DVC_1,
> +	}, {
>  		.range_min = DA9062AA_COUNT_S,
>  		.range_max = DA9062AA_SECOND_D,
> +	}, {
> +		.range_min = DA9062AA_SEQ,
> +		.range_max = DA9062AA_SEQ,
> +	}, {
> +		.range_min = DA9062AA_EN_32K,
> +		.range_max = DA9062AA_EN_32K,
>  	},
>  };
>  

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

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#1331339

On 10 February 2016 16:56, Lee Jones wrote:

> To: Opensource [Steve Twiss]
> Cc: LINUXKERNEL; David Dajun Chen; Support Opensource
> Subject: Re: [PATCH V1] mfd: da9062: fix missing volatile registers in the core
> regmap_range volatile lists
> 
> On Mon, 01 Feb 2016, Steve Twiss wrote:
> 
> > From: Steve Twiss <stwiss.opensource@diasemi.com>
> >
> > Add an updated set of registers listed in the core regmap_range volatile
> > ranges defined for the DA9062.
> >
> > These new registers contain bits that cannot be considered under the full
> > control of software. Under various conditions the hardware will set and/or
> > automatically clear bit(s) contained in these registers.
> >
> > When using a cached version of regmap, the volatility of these registers must
> > be identified otherwise the regmap operations may not ensure the registers
> > are explicitly altered.
> >
> > As well as updating the list of volatile registers, this change will fix a
> > corner case discovered in the DA9063 ONKEY which is used by the DA9062 core.
> >
> > In the ONKEY case, the CONTROL_B register is now listed as volatile in the
> > regmap_range because it contains the bit field NONKEY_LOCK. This bit can be
> > altered by hardware, in which case regmap must be notified of its ability
> > to be manpiulated outside of software control.
> >
> > Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
> 
> Applied, thanks.

Thanks.
Regards,
Steve

[...]

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#1331775

On Wed, 10 Feb 2016, Opensource [Steve Twiss] wrote:

> 
> On 10 February 2016 16:56, Lee Jones wrote:
> 
> > To: Opensource [Steve Twiss]
> > Cc: LINUXKERNEL; David Dajun Chen; Support Opensource
> > Subject: Re: [PATCH V1] mfd: da9062: fix missing volatile registers in the core
> > regmap_range volatile lists
> > 
> > On Mon, 01 Feb 2016, Steve Twiss wrote:
> > 
> > > From: Steve Twiss <stwiss.opensource@diasemi.com>
> > >
> > > Add an updated set of registers listed in the core regmap_range volatile
> > > ranges defined for the DA9062.
> > >
> > > These new registers contain bits that cannot be considered under the full
> > > control of software. Under various conditions the hardware will set and/or
> > > automatically clear bit(s) contained in these registers.
> > >
> > > When using a cached version of regmap, the volatility of these registers must
> > > be identified otherwise the regmap operations may not ensure the registers
> > > are explicitly altered.
> > >
> > > As well as updating the list of volatile registers, this change will fix a
> > > corner case discovered in the DA9063 ONKEY which is used by the DA9062 core.
> > >
> > > In the ONKEY case, the CONTROL_B register is now listed as volatile in the
> > > regmap_range because it contains the bit field NONKEY_LOCK. This bit can be
> > > altered by hardware, in which case regmap must be notified of its ability
> > > to be manpiulated outside of software control.
> > >
> > > Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
> > 
> > Applied, thanks.
> 
> Thanks.
> Regards,
> Steve

No need for thank yous.  They're implied. ;)

[... and they just account for churn in my already very busy inbox].

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

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