* [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code. @ 2014-01-26 7:15 Manish Badarkhe 2014-01-26 13:22 ` Tomasz Figa 0 siblings, 1 reply; 9+ messages in thread From: Manish Badarkhe @ 2014-01-26 7:15 UTC (permalink / raw) To: linux-samsung-soc, linux-kernel; +Cc: dbaryshkov, dwmw2, badarkhe.manish Instead of "#if define CONFIG_OF" use "IS_ENABLED(CONFIG_OF)" option for DT code to avoid if-deffery in code. Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com> --- :100644 100644 b4513f2... d353fbc... M drivers/power/max8925_power.c drivers/power/max8925_power.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c index b4513f2..d353fbc 100644 --- a/drivers/power/max8925_power.c +++ b/drivers/power/max8925_power.c @@ -427,7 +427,6 @@ static int max8925_deinit_charger(struct max8925_power_info *info) return 0; } -#ifdef CONFIG_OF static struct max8925_power_pdata * max8925_power_dt_init(struct platform_device *pdev) { @@ -468,13 +467,6 @@ max8925_power_dt_init(struct platform_device *pdev) return pdata; } -#else -static struct max8925_power_pdata * -max8925_power_dt_init(struct platform_device *pdev) -{ - return pdev->dev.platform_data; -} -#endif static int max8925_power_probe(struct platform_device *pdev) { @@ -483,7 +475,11 @@ static int max8925_power_probe(struct platform_device *pdev) struct max8925_power_info *info; int ret; - pdata = max8925_power_dt_init(pdev); + if (IS_ENABLED(CONFIG_OF)) + pdata = max8925_power_dt_init(pdev); + else + pdata = pdev->dev.platform_data; + if (!pdata) { dev_err(&pdev->dev, "platform data isn't assigned to " "power supply\n"); -- 1.7.10.4 ^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code. 2014-01-26 7:15 [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code Manish Badarkhe @ 2014-01-26 13:22 ` Tomasz Figa 2014-01-26 14:01 ` Manish Badarkhe 0 siblings, 1 reply; 9+ messages in thread From: Tomasz Figa @ 2014-01-26 13:22 UTC (permalink / raw) To: Manish Badarkhe, linux-samsung-soc, linux-kernel; +Cc: dbaryshkov, dwmw2 Hi Manish, On 26.01.2014 08:15, Manish Badarkhe wrote: > Instead of "#if define CONFIG_OF" use "IS_ENABLED(CONFIG_OF)" > option for DT code to avoid if-deffery in code. > > Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com> > --- > :100644 100644 b4513f2... d353fbc... M drivers/power/max8925_power.c > drivers/power/max8925_power.c | 14 +++++--------- > 1 file changed, 5 insertions(+), 9 deletions(-) > > diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c > index b4513f2..d353fbc 100644 > --- a/drivers/power/max8925_power.c > +++ b/drivers/power/max8925_power.c > @@ -427,7 +427,6 @@ static int max8925_deinit_charger(struct max8925_power_info *info) > return 0; > } > > -#ifdef CONFIG_OF > static struct max8925_power_pdata * > max8925_power_dt_init(struct platform_device *pdev) > { > @@ -468,13 +467,6 @@ max8925_power_dt_init(struct platform_device *pdev) > > return pdata; > } > -#else > -static struct max8925_power_pdata * > -max8925_power_dt_init(struct platform_device *pdev) > -{ > - return pdev->dev.platform_data; > -} > -#endif > > static int max8925_power_probe(struct platform_device *pdev) > { > @@ -483,7 +475,11 @@ static int max8925_power_probe(struct platform_device *pdev) > struct max8925_power_info *info; > int ret; > > - pdata = max8925_power_dt_init(pdev); > + if (IS_ENABLED(CONFIG_OF)) > + pdata = max8925_power_dt_init(pdev); > + else > + pdata = pdev->dev.platform_data; > + This does not look much better than before this patch. Instead of "if-deffery" outside function bodies you are adding "iffery" (if there is such a word) inside a function. What about adding if (!IS_ENABLED(CONFIG_OF)) return pdev->dev.platform_data; on top of max8925_power_dt_init() instead or maybe also renaming this function to max8925_get_pdata()? Best regards, Tomasz ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code. 2014-01-26 13:22 ` Tomasz Figa @ 2014-01-26 14:01 ` Manish Badarkhe 2014-01-26 21:45 ` Dmitry Torokhov 0 siblings, 1 reply; 9+ messages in thread From: Manish Badarkhe @ 2014-01-26 14:01 UTC (permalink / raw) To: Tomasz Figa Cc: linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Dmitry Eremin-Solenikov, David Woodhouse Hi Tomasz, Thank you for your review comments. On Sun, Jan 26, 2014 at 6:52 PM, Tomasz Figa <tomasz.figa@gmail.com> wrote: > > Hi Manish, > > > On 26.01.2014 08:15, Manish Badarkhe wrote: >> >> Instead of "#if define CONFIG_OF" use "IS_ENABLED(CONFIG_OF)" >> option for DT code to avoid if-deffery in code. >> >> Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com> >> --- >> :100644 100644 b4513f2... d353fbc... M drivers/power/max8925_power.c >> drivers/power/max8925_power.c | 14 +++++--------- >> 1 file changed, 5 insertions(+), 9 deletions(-) >> >> diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c >> index b4513f2..d353fbc 100644 >> --- a/drivers/power/max8925_power.c >> +++ b/drivers/power/max8925_power.c >> @@ -427,7 +427,6 @@ static int max8925_deinit_charger(struct max8925_power_info *info) >> return 0; >> } >> >> -#ifdef CONFIG_OF >> static struct max8925_power_pdata * >> max8925_power_dt_init(struct platform_device *pdev) >> { >> @@ -468,13 +467,6 @@ max8925_power_dt_init(struct platform_device *pdev) >> >> return pdata; >> } >> -#else >> -static struct max8925_power_pdata * >> -max8925_power_dt_init(struct platform_device *pdev) >> -{ >> - return pdev->dev.platform_data; >> -} >> -#endif >> >> static int max8925_power_probe(struct platform_device *pdev) >> { >> @@ -483,7 +475,11 @@ static int max8925_power_probe(struct platform_device *pdev) >> struct max8925_power_info *info; >> int ret; >> >> - pdata = max8925_power_dt_init(pdev); >> + if (IS_ENABLED(CONFIG_OF)) >> + pdata = max8925_power_dt_init(pdev); >> + else >> + pdata = pdev->dev.platform_data; >> + > > > This does not look much better than before this patch. Instead of "if-deffery" outside function bodies you are adding "iffery" (if there is such a word) inside a function. > What about adding > > if (!IS_ENABLED(CONFIG_OF)) > return pdev->dev.platform_data; > > on top of max8925_power_dt_init() instead or maybe also renaming this function to max8925_get_pdata()? Okay, I will rename function "max8925_power_dt_init()" to "max8925_get_pdata()". As you suggested, in the body of this function will add a logic to retrieve data in case of DT and non-DT platforms. Regards Manish Badarkhe ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code. 2014-01-26 14:01 ` Manish Badarkhe @ 2014-01-26 21:45 ` Dmitry Torokhov 2014-01-26 21:49 ` Tomasz Figa 0 siblings, 1 reply; 9+ messages in thread From: Dmitry Torokhov @ 2014-01-26 21:45 UTC (permalink / raw) To: Manish Badarkhe Cc: Tomasz Figa, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Dmitry Eremin-Solenikov, David Woodhouse On Sun, Jan 26, 2014 at 07:31:50PM +0530, Manish Badarkhe wrote: > Hi Tomasz, > > Thank you for your review comments. > > On Sun, Jan 26, 2014 at 6:52 PM, Tomasz Figa <tomasz.figa@gmail.com> wrote: > > > > Hi Manish, > > > > > > On 26.01.2014 08:15, Manish Badarkhe wrote: > >> > >> Instead of "#if define CONFIG_OF" use "IS_ENABLED(CONFIG_OF)" > >> option for DT code to avoid if-deffery in code. > >> > >> Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com> > >> --- > >> :100644 100644 b4513f2... d353fbc... M drivers/power/max8925_power.c > >> drivers/power/max8925_power.c | 14 +++++--------- > >> 1 file changed, 5 insertions(+), 9 deletions(-) > >> > >> diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c > >> index b4513f2..d353fbc 100644 > >> --- a/drivers/power/max8925_power.c > >> +++ b/drivers/power/max8925_power.c > >> @@ -427,7 +427,6 @@ static int max8925_deinit_charger(struct max8925_power_info *info) > >> return 0; > >> } > >> > >> -#ifdef CONFIG_OF > >> static struct max8925_power_pdata * > >> max8925_power_dt_init(struct platform_device *pdev) > >> { > >> @@ -468,13 +467,6 @@ max8925_power_dt_init(struct platform_device *pdev) > >> > >> return pdata; > >> } > >> -#else > >> -static struct max8925_power_pdata * > >> -max8925_power_dt_init(struct platform_device *pdev) > >> -{ > >> - return pdev->dev.platform_data; > >> -} > >> -#endif > >> > >> static int max8925_power_probe(struct platform_device *pdev) > >> { > >> @@ -483,7 +475,11 @@ static int max8925_power_probe(struct platform_device *pdev) > >> struct max8925_power_info *info; > >> int ret; > >> > >> - pdata = max8925_power_dt_init(pdev); > >> + if (IS_ENABLED(CONFIG_OF)) > >> + pdata = max8925_power_dt_init(pdev); > >> + else > >> + pdata = pdev->dev.platform_data; > >> + > > > > > > This does not look much better than before this patch. Instead of "if-deffery" outside function bodies you are adding "iffery" (if there is such a word) inside a function. > > What about adding > > > > if (!IS_ENABLED(CONFIG_OF)) > > return pdev->dev.platform_data; > > > > on top of max8925_power_dt_init() instead or maybe also renaming this function to max8925_get_pdata()? > > Okay, I will rename function "max8925_power_dt_init()" to "max8925_get_pdata()". > As you suggested, in the body of this function will add a logic to > retrieve data in case > of DT and non-DT platforms. Should we not always favor platform-supplied data regardless of CONFIG_OF state and fall back to DT (firmware) supplied data if platform data is absent? This way one can tweak kernel behavior without needing to change firmware. Thanks. -- Dmitry ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code. 2014-01-26 21:45 ` Dmitry Torokhov @ 2014-01-26 21:49 ` Tomasz Figa 2014-01-26 22:31 ` Dmitry Eremin-Solenikov 0 siblings, 1 reply; 9+ messages in thread From: Tomasz Figa @ 2014-01-26 21:49 UTC (permalink / raw) To: Dmitry Torokhov, Manish Badarkhe Cc: linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Dmitry Eremin-Solenikov, David Woodhouse On 26.01.2014 22:45, Dmitry Torokhov wrote: > On Sun, Jan 26, 2014 at 07:31:50PM +0530, Manish Badarkhe wrote: >> Hi Tomasz, >> >> Thank you for your review comments. >> >> On Sun, Jan 26, 2014 at 6:52 PM, Tomasz Figa <tomasz.figa@gmail.com> wrote: >>> >>> Hi Manish, >>> >>> >>> On 26.01.2014 08:15, Manish Badarkhe wrote: >>>> >>>> Instead of "#if define CONFIG_OF" use "IS_ENABLED(CONFIG_OF)" >>>> option for DT code to avoid if-deffery in code. >>>> >>>> Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com> >>>> --- >>>> :100644 100644 b4513f2... d353fbc... M drivers/power/max8925_power.c >>>> drivers/power/max8925_power.c | 14 +++++--------- >>>> 1 file changed, 5 insertions(+), 9 deletions(-) >>>> >>>> diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c >>>> index b4513f2..d353fbc 100644 >>>> --- a/drivers/power/max8925_power.c >>>> +++ b/drivers/power/max8925_power.c >>>> @@ -427,7 +427,6 @@ static int max8925_deinit_charger(struct max8925_power_info *info) >>>> return 0; >>>> } >>>> >>>> -#ifdef CONFIG_OF >>>> static struct max8925_power_pdata * >>>> max8925_power_dt_init(struct platform_device *pdev) >>>> { >>>> @@ -468,13 +467,6 @@ max8925_power_dt_init(struct platform_device *pdev) >>>> >>>> return pdata; >>>> } >>>> -#else >>>> -static struct max8925_power_pdata * >>>> -max8925_power_dt_init(struct platform_device *pdev) >>>> -{ >>>> - return pdev->dev.platform_data; >>>> -} >>>> -#endif >>>> >>>> static int max8925_power_probe(struct platform_device *pdev) >>>> { >>>> @@ -483,7 +475,11 @@ static int max8925_power_probe(struct platform_device *pdev) >>>> struct max8925_power_info *info; >>>> int ret; >>>> >>>> - pdata = max8925_power_dt_init(pdev); >>>> + if (IS_ENABLED(CONFIG_OF)) >>>> + pdata = max8925_power_dt_init(pdev); >>>> + else >>>> + pdata = pdev->dev.platform_data; >>>> + >>> >>> >>> This does not look much better than before this patch. Instead of "if-deffery" outside function bodies you are adding "iffery" (if there is such a word) inside a function. >>> What about adding >>> >>> if (!IS_ENABLED(CONFIG_OF)) >>> return pdev->dev.platform_data; >>> >>> on top of max8925_power_dt_init() instead or maybe also renaming this function to max8925_get_pdata()? >> >> Okay, I will rename function "max8925_power_dt_init()" to "max8925_get_pdata()". >> As you suggested, in the body of this function will add a logic to >> retrieve data in case >> of DT and non-DT platforms. > > Should we not always favor platform-supplied data regardless of > CONFIG_OF state and fall back to DT (firmware) supplied data if platform > data is absent? This way one can tweak kernel behavior without needing > to change firmware. I guess we should, but apparently this was not the original behavior before this patch, so I'm not sure if we should be squashing such semantic change with this simple refactor. Best regards, Tomasz ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code. 2014-01-26 21:49 ` Tomasz Figa @ 2014-01-26 22:31 ` Dmitry Eremin-Solenikov 2014-01-26 23:14 ` Dmitry Torokhov 0 siblings, 1 reply; 9+ messages in thread From: Dmitry Eremin-Solenikov @ 2014-01-26 22:31 UTC (permalink / raw) To: Tomasz Figa Cc: Dmitry Torokhov, Manish Badarkhe, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, David Woodhouse On Mon, Jan 27, 2014 at 1:49 AM, Tomasz Figa <tomasz.figa@gmail.com> wrote: > On 26.01.2014 22:45, Dmitry Torokhov wrote: >> >> On Sun, Jan 26, 2014 at 07:31:50PM +0530, Manish Badarkhe wrote: >>> >>> Hi Tomasz, >>> >>> Thank you for your review comments. >>> >>> On Sun, Jan 26, 2014 at 6:52 PM, Tomasz Figa <tomasz.figa@gmail.com> >>> wrote: >>>> >>>> >>>> Hi Manish, >>>> >>>> >>>> On 26.01.2014 08:15, Manish Badarkhe wrote: >>>>> >>>>> >>>>> Instead of "#if define CONFIG_OF" use "IS_ENABLED(CONFIG_OF)" >>>>> option for DT code to avoid if-deffery in code. >>>>> >>>>> Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com> >>>>> --- >>>>> :100644 100644 b4513f2... d353fbc... M drivers/power/max8925_power.c >>>>> drivers/power/max8925_power.c | 14 +++++--------- >>>>> 1 file changed, 5 insertions(+), 9 deletions(-) >>>>> >>>>> diff --git a/drivers/power/max8925_power.c >>>>> b/drivers/power/max8925_power.c >>>>> index b4513f2..d353fbc 100644 >>>>> --- a/drivers/power/max8925_power.c >>>>> +++ b/drivers/power/max8925_power.c >>>>> @@ -427,7 +427,6 @@ static int max8925_deinit_charger(struct >>>>> max8925_power_info *info) >>>>> return 0; >>>>> } >>>>> >>>>> -#ifdef CONFIG_OF >>>>> static struct max8925_power_pdata * >>>>> max8925_power_dt_init(struct platform_device *pdev) >>>>> { >>>>> @@ -468,13 +467,6 @@ max8925_power_dt_init(struct platform_device >>>>> *pdev) >>>>> >>>>> return pdata; >>>>> } >>>>> -#else >>>>> -static struct max8925_power_pdata * >>>>> -max8925_power_dt_init(struct platform_device *pdev) >>>>> -{ >>>>> - return pdev->dev.platform_data; >>>>> -} >>>>> -#endif >>>>> >>>>> static int max8925_power_probe(struct platform_device *pdev) >>>>> { >>>>> @@ -483,7 +475,11 @@ static int max8925_power_probe(struct >>>>> platform_device *pdev) >>>>> struct max8925_power_info *info; >>>>> int ret; >>>>> >>>>> - pdata = max8925_power_dt_init(pdev); >>>>> + if (IS_ENABLED(CONFIG_OF)) >>>>> + pdata = max8925_power_dt_init(pdev); >>>>> + else >>>>> + pdata = pdev->dev.platform_data; >>>>> + >>>> >>>> >>>> >>>> This does not look much better than before this patch. Instead of >>>> "if-deffery" outside function bodies you are adding "iffery" (if there is >>>> such a word) inside a function. >>>> What about adding >>>> >>>> if (!IS_ENABLED(CONFIG_OF)) >>>> return pdev->dev.platform_data; >>>> >>>> on top of max8925_power_dt_init() instead or maybe also renaming this >>>> function to max8925_get_pdata()? >>> >>> >>> Okay, I will rename function "max8925_power_dt_init()" to >>> "max8925_get_pdata()". >>> As you suggested, in the body of this function will add a logic to >>> retrieve data in case >>> of DT and non-DT platforms. >> >> >> Should we not always favor platform-supplied data regardless of >> CONFIG_OF state and fall back to DT (firmware) supplied data if platform >> data is absent? This way one can tweak kernel behavior without needing >> to change firmware. > > > I guess we should, but apparently this was not the original behavior before > this patch, so I'm not sure if we should be squashing such semantic change > with this simple refactor. Hmm. Judging from the code, max8925_power_dt_init() function follows exactly opposite strategy - it uses platform_data if of_node is not populated/available. So (if dt_init will compile with CONFIG_OF disabled) one can always use _dt_init() function to retrieve pdata. -- With best wishes Dmitry ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code. 2014-01-26 22:31 ` Dmitry Eremin-Solenikov @ 2014-01-26 23:14 ` Dmitry Torokhov 2014-01-26 23:46 ` Dmitry Eremin-Solenikov 0 siblings, 1 reply; 9+ messages in thread From: Dmitry Torokhov @ 2014-01-26 23:14 UTC (permalink / raw) To: Dmitry Eremin-Solenikov Cc: Tomasz Figa, Manish Badarkhe, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, David Woodhouse On Mon, Jan 27, 2014 at 02:31:59AM +0400, Dmitry Eremin-Solenikov wrote: > On Mon, Jan 27, 2014 at 1:49 AM, Tomasz Figa <tomasz.figa@gmail.com> wrote: > > On 26.01.2014 22:45, Dmitry Torokhov wrote: > >> > >> On Sun, Jan 26, 2014 at 07:31:50PM +0530, Manish Badarkhe wrote: > >>> > >>> Hi Tomasz, > >>> > >>> Thank you for your review comments. > >>> > >>> On Sun, Jan 26, 2014 at 6:52 PM, Tomasz Figa <tomasz.figa@gmail.com> > >>> wrote: > >>>> > >>>> > >>>> Hi Manish, > >>>> > >>>> > >>>> On 26.01.2014 08:15, Manish Badarkhe wrote: > >>>>> > >>>>> > >>>>> Instead of "#if define CONFIG_OF" use "IS_ENABLED(CONFIG_OF)" > >>>>> option for DT code to avoid if-deffery in code. > >>>>> > >>>>> Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com> > >>>>> --- > >>>>> :100644 100644 b4513f2... d353fbc... M drivers/power/max8925_power.c > >>>>> drivers/power/max8925_power.c | 14 +++++--------- > >>>>> 1 file changed, 5 insertions(+), 9 deletions(-) > >>>>> > >>>>> diff --git a/drivers/power/max8925_power.c > >>>>> b/drivers/power/max8925_power.c > >>>>> index b4513f2..d353fbc 100644 > >>>>> --- a/drivers/power/max8925_power.c > >>>>> +++ b/drivers/power/max8925_power.c > >>>>> @@ -427,7 +427,6 @@ static int max8925_deinit_charger(struct > >>>>> max8925_power_info *info) > >>>>> return 0; > >>>>> } > >>>>> > >>>>> -#ifdef CONFIG_OF > >>>>> static struct max8925_power_pdata * > >>>>> max8925_power_dt_init(struct platform_device *pdev) > >>>>> { > >>>>> @@ -468,13 +467,6 @@ max8925_power_dt_init(struct platform_device > >>>>> *pdev) > >>>>> > >>>>> return pdata; > >>>>> } > >>>>> -#else > >>>>> -static struct max8925_power_pdata * > >>>>> -max8925_power_dt_init(struct platform_device *pdev) > >>>>> -{ > >>>>> - return pdev->dev.platform_data; > >>>>> -} > >>>>> -#endif > >>>>> > >>>>> static int max8925_power_probe(struct platform_device *pdev) > >>>>> { > >>>>> @@ -483,7 +475,11 @@ static int max8925_power_probe(struct > >>>>> platform_device *pdev) > >>>>> struct max8925_power_info *info; > >>>>> int ret; > >>>>> > >>>>> - pdata = max8925_power_dt_init(pdev); > >>>>> + if (IS_ENABLED(CONFIG_OF)) > >>>>> + pdata = max8925_power_dt_init(pdev); > >>>>> + else > >>>>> + pdata = pdev->dev.platform_data; > >>>>> + > >>>> > >>>> > >>>> > >>>> This does not look much better than before this patch. Instead of > >>>> "if-deffery" outside function bodies you are adding "iffery" (if there is > >>>> such a word) inside a function. > >>>> What about adding > >>>> > >>>> if (!IS_ENABLED(CONFIG_OF)) > >>>> return pdev->dev.platform_data; > >>>> > >>>> on top of max8925_power_dt_init() instead or maybe also renaming this > >>>> function to max8925_get_pdata()? > >>> > >>> > >>> Okay, I will rename function "max8925_power_dt_init()" to > >>> "max8925_get_pdata()". > >>> As you suggested, in the body of this function will add a logic to > >>> retrieve data in case > >>> of DT and non-DT platforms. > >> > >> > >> Should we not always favor platform-supplied data regardless of > >> CONFIG_OF state and fall back to DT (firmware) supplied data if platform > >> data is absent? This way one can tweak kernel behavior without needing > >> to change firmware. > > > > > > I guess we should, but apparently this was not the original behavior before > > this patch, so I'm not sure if we should be squashing such semantic change > > with this simple refactor. > > Hmm. Judging from the code, max8925_power_dt_init() function follows exactly > opposite strategy - it uses platform_data if of_node is not populated/available. > So (if dt_init will compile with CONFIG_OF disabled) one can always > use _dt_init() > function to retrieve pdata. Right, and I question whether this is good behavior or if it should be corrected. Thanks. -- Dmitry ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code. 2014-01-26 23:14 ` Dmitry Torokhov @ 2014-01-26 23:46 ` Dmitry Eremin-Solenikov 2014-01-27 7:27 ` Manish Badarkhe 0 siblings, 1 reply; 9+ messages in thread From: Dmitry Eremin-Solenikov @ 2014-01-26 23:46 UTC (permalink / raw) To: Dmitry Torokhov Cc: Tomasz Figa, Manish Badarkhe, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, David Woodhouse On Mon, Jan 27, 2014 at 3:14 AM, Dmitry Torokhov <dmitry.torokhov@gmail.com> wrote: > On Mon, Jan 27, 2014 at 02:31:59AM +0400, Dmitry Eremin-Solenikov wrote: >> On Mon, Jan 27, 2014 at 1:49 AM, Tomasz Figa <tomasz.figa@gmail.com> wrote: >> > On 26.01.2014 22:45, Dmitry Torokhov wrote: >> >> >> >> On Sun, Jan 26, 2014 at 07:31:50PM +0530, Manish Badarkhe wrote: >> >>> >> >>> Hi Tomasz, >> >>> >> >>> Thank you for your review comments. >> >>> >> >>> On Sun, Jan 26, 2014 at 6:52 PM, Tomasz Figa <tomasz.figa@gmail.com> >> >>> wrote: >> >>>> >> >>>> >> >>>> Hi Manish, >> >>>> >> >>>> >> >>>> On 26.01.2014 08:15, Manish Badarkhe wrote: >> >>>>> >> >>>>> >> >>>>> Instead of "#if define CONFIG_OF" use "IS_ENABLED(CONFIG_OF)" >> >>>>> option for DT code to avoid if-deffery in code. >> >>>>> >> >>>>> Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com> >> >>>>> --- >> >>>>> :100644 100644 b4513f2... d353fbc... M drivers/power/max8925_power.c >> >>>>> drivers/power/max8925_power.c | 14 +++++--------- >> >>>>> 1 file changed, 5 insertions(+), 9 deletions(-) >> >>>>> >> >>>>> diff --git a/drivers/power/max8925_power.c >> >>>>> b/drivers/power/max8925_power.c >> >>>>> index b4513f2..d353fbc 100644 >> >>>>> --- a/drivers/power/max8925_power.c >> >>>>> +++ b/drivers/power/max8925_power.c >> >>>>> @@ -427,7 +427,6 @@ static int max8925_deinit_charger(struct >> >>>>> max8925_power_info *info) >> >>>>> return 0; >> >>>>> } >> >>>>> >> >>>>> -#ifdef CONFIG_OF >> >>>>> static struct max8925_power_pdata * >> >>>>> max8925_power_dt_init(struct platform_device *pdev) >> >>>>> { >> >>>>> @@ -468,13 +467,6 @@ max8925_power_dt_init(struct platform_device >> >>>>> *pdev) >> >>>>> >> >>>>> return pdata; >> >>>>> } >> >>>>> -#else >> >>>>> -static struct max8925_power_pdata * >> >>>>> -max8925_power_dt_init(struct platform_device *pdev) >> >>>>> -{ >> >>>>> - return pdev->dev.platform_data; >> >>>>> -} >> >>>>> -#endif >> >>>>> >> >>>>> static int max8925_power_probe(struct platform_device *pdev) >> >>>>> { >> >>>>> @@ -483,7 +475,11 @@ static int max8925_power_probe(struct >> >>>>> platform_device *pdev) >> >>>>> struct max8925_power_info *info; >> >>>>> int ret; >> >>>>> >> >>>>> - pdata = max8925_power_dt_init(pdev); >> >>>>> + if (IS_ENABLED(CONFIG_OF)) >> >>>>> + pdata = max8925_power_dt_init(pdev); >> >>>>> + else >> >>>>> + pdata = pdev->dev.platform_data; >> >>>>> + >> >>>> >> >>>> >> >>>> >> >>>> This does not look much better than before this patch. Instead of >> >>>> "if-deffery" outside function bodies you are adding "iffery" (if there is >> >>>> such a word) inside a function. >> >>>> What about adding >> >>>> >> >>>> if (!IS_ENABLED(CONFIG_OF)) >> >>>> return pdev->dev.platform_data; >> >>>> >> >>>> on top of max8925_power_dt_init() instead or maybe also renaming this >> >>>> function to max8925_get_pdata()? >> >>> >> >>> >> >>> Okay, I will rename function "max8925_power_dt_init()" to >> >>> "max8925_get_pdata()". >> >>> As you suggested, in the body of this function will add a logic to >> >>> retrieve data in case >> >>> of DT and non-DT platforms. >> >> >> >> >> >> Should we not always favor platform-supplied data regardless of >> >> CONFIG_OF state and fall back to DT (firmware) supplied data if platform >> >> data is absent? This way one can tweak kernel behavior without needing >> >> to change firmware. >> > >> > >> > I guess we should, but apparently this was not the original behavior before >> > this patch, so I'm not sure if we should be squashing such semantic change >> > with this simple refactor. >> >> Hmm. Judging from the code, max8925_power_dt_init() function follows exactly >> opposite strategy - it uses platform_data if of_node is not populated/available. >> So (if dt_init will compile with CONFIG_OF disabled) one can always >> use _dt_init() >> function to retrieve pdata. > > Right, and I question whether this is good behavior or if it should be > corrected. I'd say, correct it. -- With best wishes Dmitry ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code. 2014-01-26 23:46 ` Dmitry Eremin-Solenikov @ 2014-01-27 7:27 ` Manish Badarkhe 0 siblings, 0 replies; 9+ messages in thread From: Manish Badarkhe @ 2014-01-27 7:27 UTC (permalink / raw) To: Dmitry Eremin-Solenikov Cc: Dmitry Torokhov, Tomasz Figa, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, David Woodhouse Hi Thank you for review. On Mon, Jan 27, 2014 at 5:16 AM, Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> wrote: > On Mon, Jan 27, 2014 at 3:14 AM, Dmitry Torokhov > <dmitry.torokhov@gmail.com> wrote: >> On Mon, Jan 27, 2014 at 02:31:59AM +0400, Dmitry Eremin-Solenikov wrote: >>> On Mon, Jan 27, 2014 at 1:49 AM, Tomasz Figa <tomasz.figa@gmail.com> wrote: >>> > On 26.01.2014 22:45, Dmitry Torokhov wrote: >>> >> >>> >> On Sun, Jan 26, 2014 at 07:31:50PM +0530, Manish Badarkhe wrote: >>> >>> >>> >>> Hi Tomasz, >>> >>> >>> >>> Thank you for your review comments. >>> >>> >>> >>> On Sun, Jan 26, 2014 at 6:52 PM, Tomasz Figa <tomasz.figa@gmail.com> >>> >>> wrote: >>> >>>> >>> >>>> >>> >>>> Hi Manish, >>> >>>> >>> >>>> >>> >>>> On 26.01.2014 08:15, Manish Badarkhe wrote: >>> >>>>> >>> >>>>> >>> >>>>> Instead of "#if define CONFIG_OF" use "IS_ENABLED(CONFIG_OF)" >>> >>>>> option for DT code to avoid if-deffery in code. >>> >>>>> >>> >>>>> Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com> >>> >>>>> --- >>> >>>>> :100644 100644 b4513f2... d353fbc... M drivers/power/max8925_power.c >>> >>>>> drivers/power/max8925_power.c | 14 +++++--------- >>> >>>>> 1 file changed, 5 insertions(+), 9 deletions(-) >>> >>>>> >>> >>>>> diff --git a/drivers/power/max8925_power.c >>> >>>>> b/drivers/power/max8925_power.c >>> >>>>> index b4513f2..d353fbc 100644 >>> >>>>> --- a/drivers/power/max8925_power.c >>> >>>>> +++ b/drivers/power/max8925_power.c >>> >>>>> @@ -427,7 +427,6 @@ static int max8925_deinit_charger(struct >>> >>>>> max8925_power_info *info) >>> >>>>> return 0; >>> >>>>> } >>> >>>>> >>> >>>>> -#ifdef CONFIG_OF >>> >>>>> static struct max8925_power_pdata * >>> >>>>> max8925_power_dt_init(struct platform_device *pdev) >>> >>>>> { >>> >>>>> @@ -468,13 +467,6 @@ max8925_power_dt_init(struct platform_device >>> >>>>> *pdev) >>> >>>>> >>> >>>>> return pdata; >>> >>>>> } >>> >>>>> -#else >>> >>>>> -static struct max8925_power_pdata * >>> >>>>> -max8925_power_dt_init(struct platform_device *pdev) >>> >>>>> -{ >>> >>>>> - return pdev->dev.platform_data; >>> >>>>> -} >>> >>>>> -#endif >>> >>>>> >>> >>>>> static int max8925_power_probe(struct platform_device *pdev) >>> >>>>> { >>> >>>>> @@ -483,7 +475,11 @@ static int max8925_power_probe(struct >>> >>>>> platform_device *pdev) >>> >>>>> struct max8925_power_info *info; >>> >>>>> int ret; >>> >>>>> >>> >>>>> - pdata = max8925_power_dt_init(pdev); >>> >>>>> + if (IS_ENABLED(CONFIG_OF)) >>> >>>>> + pdata = max8925_power_dt_init(pdev); >>> >>>>> + else >>> >>>>> + pdata = pdev->dev.platform_data; >>> >>>>> + >>> >>>> >>> >>>> >>> >>>> >>> >>>> This does not look much better than before this patch. Instead of >>> >>>> "if-deffery" outside function bodies you are adding "iffery" (if there is >>> >>>> such a word) inside a function. >>> >>>> What about adding >>> >>>> >>> >>>> if (!IS_ENABLED(CONFIG_OF)) >>> >>>> return pdev->dev.platform_data; >>> >>>> >>> >>>> on top of max8925_power_dt_init() instead or maybe also renaming this >>> >>>> function to max8925_get_pdata()? >>> >>> >>> >>> >>> >>> Okay, I will rename function "max8925_power_dt_init()" to >>> >>> "max8925_get_pdata()". >>> >>> As you suggested, in the body of this function will add a logic to >>> >>> retrieve data in case >>> >>> of DT and non-DT platforms. >>> >> >>> >> >>> >> Should we not always favor platform-supplied data regardless of >>> >> CONFIG_OF state and fall back to DT (firmware) supplied data if platform >>> >> data is absent? This way one can tweak kernel behavior without needing >>> >> to change firmware. >>> > >>> > >>> > I guess we should, but apparently this was not the original behavior before >>> > this patch, so I'm not sure if we should be squashing such semantic change >>> > with this simple refactor. >>> >>> Hmm. Judging from the code, max8925_power_dt_init() function follows exactly >>> opposite strategy - it uses platform_data if of_node is not populated/available. >>> So (if dt_init will compile with CONFIG_OF disabled) one can always >>> use _dt_init() >>> function to retrieve pdata. >> >> Right, and I question whether this is good behavior or if it should be >> corrected. > > I'd say, correct it. Okay, I will update code as per Dmitry's feedback. Regards Manish Badarkhe ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2014-01-27 7:27 UTC | newest] Thread overview: 9+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-01-26 7:15 [PATCH] max8925_power: Use "IS_ENABLED(CONFIG_OF)" for DT code Manish Badarkhe 2014-01-26 13:22 ` Tomasz Figa 2014-01-26 14:01 ` Manish Badarkhe 2014-01-26 21:45 ` Dmitry Torokhov 2014-01-26 21:49 ` Tomasz Figa 2014-01-26 22:31 ` Dmitry Eremin-Solenikov 2014-01-26 23:14 ` Dmitry Torokhov 2014-01-26 23:46 ` Dmitry Eremin-Solenikov 2014-01-27 7:27 ` Manish Badarkhe
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