* [PATCH RFC] mmc: add slot argument to mmc_of_parse @ 2014-05-07 10:06 Ludovic Desroches 2014-05-14 9:53 ` Ulf Hansson 0 siblings, 1 reply; 6+ messages in thread From: Ludovic Desroches @ 2014-05-07 10:06 UTC (permalink / raw) To: linux-arm-kernel Some hosts manage several slots. In these case information such as the bus width, chip detect and others are into the slot node. So we have to parse child nodes. If not NULL, slot node will be used instead of the device node. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> --- Hi, Since this patch is only a RFC, I have not yet updated drivers using this function. I would like to use mmc_of_parse to reduce code duplication. My issue is that atmel mci is a bit different from others mci host since it can provide several slots, so it allocates several mmc hosts. By the way, it is not the only one. When calling mmc_alloc_host, host->parent is set to &pdev->dev. mmc_of_parse uses host->parent->of_node but in my case settings are in the slot nodes so in the child nodes. That's why I would like to have a way to tell which node I want to use. Regards Ludovic drivers/mmc/core/host.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index fdea825..ed6cea5 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -300,13 +300,15 @@ static inline void mmc_host_clk_sysfs_init(struct mmc_host *host) /** * mmc_of_parse() - parse host's device-tree node * @host: host whose node should be parsed. + * @slot: some devices provide several slots so the node to parse + * is not the host one. * * To keep the rest of the MMC subsystem unaware of whether DT has been * used to to instantiate and configure this host instance or not, we * parse the properties and set respective generic mmc-host flags and * parameters. */ -int mmc_of_parse(struct mmc_host *host) +int mmc_of_parse(struct mmc_host *host, struct device_node *slot) { struct device_node *np; u32 bus_width; @@ -317,7 +319,10 @@ int mmc_of_parse(struct mmc_host *host) if (!host->parent || !host->parent->of_node) return 0; - np = host->parent->of_node; + if (slot) + np = slot; + else + np = host->parent->of_node; /* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */ if (of_property_read_u32(np, "bus-width", &bus_width) < 0) { -- 1.7.9.5 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH RFC] mmc: add slot argument to mmc_of_parse 2014-05-07 10:06 [PATCH RFC] mmc: add slot argument to mmc_of_parse Ludovic Desroches @ 2014-05-14 9:53 ` Ulf Hansson 2014-05-23 4:38 ` Jaehoon Chung 0 siblings, 1 reply; 6+ messages in thread From: Ulf Hansson @ 2014-05-14 9:53 UTC (permalink / raw) To: linux-arm-kernel On 7 May 2014 12:06, Ludovic Desroches <ludovic.desroches@atmel.com> wrote: > Some hosts manage several slots. In these case information such as the bus > width, chip detect and others are into the slot node. So we have to parse > child nodes. If not NULL, slot node will be used instead of the device > node. > > Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> > --- > > Hi, > > Since this patch is only a RFC, I have not yet updated drivers using this > function. > > I would like to use mmc_of_parse to reduce code duplication. My issue is that > atmel mci is a bit different from others mci host since it can provide > several slots, so it allocates several mmc hosts. By the way, it is not the > only one. > > When calling mmc_alloc_host, host->parent is set to &pdev->dev. mmc_of_parse > uses host->parent->of_node but in my case settings are in the slot nodes so in > the child nodes. That's why I would like to have a way to tell which node I > want to use. Seems reasonable, thanks for working on this! > > > Regards > > Ludovic > > > > drivers/mmc/core/host.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c > index fdea825..ed6cea5 100644 > --- a/drivers/mmc/core/host.c > +++ b/drivers/mmc/core/host.c > @@ -300,13 +300,15 @@ static inline void mmc_host_clk_sysfs_init(struct mmc_host *host) > /** > * mmc_of_parse() - parse host's device-tree node > * @host: host whose node should be parsed. > + * @slot: some devices provide several slots so the node to parse > + * is not the host one. > * > * To keep the rest of the MMC subsystem unaware of whether DT has been > * used to to instantiate and configure this host instance or not, we > * parse the properties and set respective generic mmc-host flags and > * parameters. > */ > -int mmc_of_parse(struct mmc_host *host) > +int mmc_of_parse(struct mmc_host *host, struct device_node *slot) > { > struct device_node *np; > u32 bus_width; > @@ -317,7 +319,10 @@ int mmc_of_parse(struct mmc_host *host) > if (!host->parent || !host->parent->of_node) > return 0; > > - np = host->parent->of_node; > + if (slot) > + np = slot; > + else > + np = host->parent->of_node; > > /* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */ > if (of_property_read_u32(np, "bus-width", &bus_width) < 0) { > -- > 1.7.9.5 > How about adding a new API, __mmc_of_parse((struct mmc_host *host, struct device_node *slot) Then let the old API mmc_of_parse() remain as is, but let it call the new API with slot == NULL. Atmel can then use the new API, but the other drivers can remain as is. Kind regards Ulf Hansson ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH RFC] mmc: add slot argument to mmc_of_parse 2014-05-14 9:53 ` Ulf Hansson @ 2014-05-23 4:38 ` Jaehoon Chung 2014-05-26 7:03 ` Ludovic Desroches 0 siblings, 1 reply; 6+ messages in thread From: Jaehoon Chung @ 2014-05-23 4:38 UTC (permalink / raw) To: linux-arm-kernel Hi, All. This patch is working on progress? I want to merge this patch for fixing dw-mmc controller problem. If this patch didn't work on progress, i will send the patch based-on this patch. Best Regards, Jaehoon Chung On 05/14/2014 06:53 PM, Ulf Hansson wrote: > On 7 May 2014 12:06, Ludovic Desroches <ludovic.desroches@atmel.com> wrote: >> Some hosts manage several slots. In these case information such as the bus >> width, chip detect and others are into the slot node. So we have to parse >> child nodes. If not NULL, slot node will be used instead of the device >> node. >> >> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> >> --- >> >> Hi, >> >> Since this patch is only a RFC, I have not yet updated drivers using this >> function. >> >> I would like to use mmc_of_parse to reduce code duplication. My issue is that >> atmel mci is a bit different from others mci host since it can provide >> several slots, so it allocates several mmc hosts. By the way, it is not the >> only one. >> >> When calling mmc_alloc_host, host->parent is set to &pdev->dev. mmc_of_parse >> uses host->parent->of_node but in my case settings are in the slot nodes so in >> the child nodes. That's why I would like to have a way to tell which node I >> want to use. > > Seems reasonable, thanks for working on this! > >> >> >> Regards >> >> Ludovic >> >> >> >> drivers/mmc/core/host.c | 9 +++++++-- >> 1 file changed, 7 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c >> index fdea825..ed6cea5 100644 >> --- a/drivers/mmc/core/host.c >> +++ b/drivers/mmc/core/host.c >> @@ -300,13 +300,15 @@ static inline void mmc_host_clk_sysfs_init(struct mmc_host *host) >> /** >> * mmc_of_parse() - parse host's device-tree node >> * @host: host whose node should be parsed. >> + * @slot: some devices provide several slots so the node to parse >> + * is not the host one. >> * >> * To keep the rest of the MMC subsystem unaware of whether DT has been >> * used to to instantiate and configure this host instance or not, we >> * parse the properties and set respective generic mmc-host flags and >> * parameters. >> */ >> -int mmc_of_parse(struct mmc_host *host) >> +int mmc_of_parse(struct mmc_host *host, struct device_node *slot) >> { >> struct device_node *np; >> u32 bus_width; >> @@ -317,7 +319,10 @@ int mmc_of_parse(struct mmc_host *host) >> if (!host->parent || !host->parent->of_node) >> return 0; >> >> - np = host->parent->of_node; >> + if (slot) >> + np = slot; >> + else >> + np = host->parent->of_node; >> >> /* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */ >> if (of_property_read_u32(np, "bus-width", &bus_width) < 0) { >> -- >> 1.7.9.5 >> > > How about adding a new API, __mmc_of_parse((struct mmc_host *host, > struct device_node *slot) > Then let the old API mmc_of_parse() remain as is, but let it call the > new API with slot == NULL. > > Atmel can then use the new API, but the other drivers can remain as is. > > Kind regards > Ulf Hansson > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo at vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH RFC] mmc: add slot argument to mmc_of_parse 2014-05-23 4:38 ` Jaehoon Chung @ 2014-05-26 7:03 ` Ludovic Desroches 2014-05-26 7:15 ` Jaehoon Chung 2014-05-26 7:49 ` Ludovic Desroches 0 siblings, 2 replies; 6+ messages in thread From: Ludovic Desroches @ 2014-05-26 7:03 UTC (permalink / raw) To: linux-arm-kernel Hi, Sorry I was on vacation, I'll send a cleaner patch updating other drivers this week. Regards Ludovic On Fri, May 23, 2014 at 01:38:06PM +0900, Jaehoon Chung wrote: > Hi, All. > > This patch is working on progress? > I want to merge this patch for fixing dw-mmc controller problem. > > If this patch didn't work on progress, i will send the patch based-on this patch. > > Best Regards, > Jaehoon Chung > > On 05/14/2014 06:53 PM, Ulf Hansson wrote: > > On 7 May 2014 12:06, Ludovic Desroches <ludovic.desroches@atmel.com> wrote: > >> Some hosts manage several slots. In these case information such as the bus > >> width, chip detect and others are into the slot node. So we have to parse > >> child nodes. If not NULL, slot node will be used instead of the device > >> node. > >> > >> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> > >> --- > >> > >> Hi, > >> > >> Since this patch is only a RFC, I have not yet updated drivers using this > >> function. > >> > >> I would like to use mmc_of_parse to reduce code duplication. My issue is that > >> atmel mci is a bit different from others mci host since it can provide > >> several slots, so it allocates several mmc hosts. By the way, it is not the > >> only one. > >> > >> When calling mmc_alloc_host, host->parent is set to &pdev->dev. mmc_of_parse > >> uses host->parent->of_node but in my case settings are in the slot nodes so in > >> the child nodes. That's why I would like to have a way to tell which node I > >> want to use. > > > > Seems reasonable, thanks for working on this! > > > >> > >> > >> Regards > >> > >> Ludovic > >> > >> > >> > >> drivers/mmc/core/host.c | 9 +++++++-- > >> 1 file changed, 7 insertions(+), 2 deletions(-) > >> > >> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c > >> index fdea825..ed6cea5 100644 > >> --- a/drivers/mmc/core/host.c > >> +++ b/drivers/mmc/core/host.c > >> @@ -300,13 +300,15 @@ static inline void mmc_host_clk_sysfs_init(struct mmc_host *host) > >> /** > >> * mmc_of_parse() - parse host's device-tree node > >> * @host: host whose node should be parsed. > >> + * @slot: some devices provide several slots so the node to parse > >> + * is not the host one. > >> * > >> * To keep the rest of the MMC subsystem unaware of whether DT has been > >> * used to to instantiate and configure this host instance or not, we > >> * parse the properties and set respective generic mmc-host flags and > >> * parameters. > >> */ > >> -int mmc_of_parse(struct mmc_host *host) > >> +int mmc_of_parse(struct mmc_host *host, struct device_node *slot) > >> { > >> struct device_node *np; > >> u32 bus_width; > >> @@ -317,7 +319,10 @@ int mmc_of_parse(struct mmc_host *host) > >> if (!host->parent || !host->parent->of_node) > >> return 0; > >> > >> - np = host->parent->of_node; > >> + if (slot) > >> + np = slot; > >> + else > >> + np = host->parent->of_node; > >> > >> /* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */ > >> if (of_property_read_u32(np, "bus-width", &bus_width) < 0) { > >> -- > >> 1.7.9.5 > >> > > > > How about adding a new API, __mmc_of_parse((struct mmc_host *host, > > struct device_node *slot) > > Then let the old API mmc_of_parse() remain as is, but let it call the > > new API with slot == NULL. > > > > Atmel can then use the new API, but the other drivers can remain as is. > > > > Kind regards > > Ulf Hansson > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > > the body of a message to majordomo at vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo at vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH RFC] mmc: add slot argument to mmc_of_parse 2014-05-26 7:03 ` Ludovic Desroches @ 2014-05-26 7:15 ` Jaehoon Chung 2014-05-26 7:49 ` Ludovic Desroches 1 sibling, 0 replies; 6+ messages in thread From: Jaehoon Chung @ 2014-05-26 7:15 UTC (permalink / raw) To: linux-arm-kernel Hi, Ludovic. I have sent the patch based on your RFC patch..how about? If you have the comment or other opinion, let me know, plz. https://patchwork.kernel.org/patch/4230101/ It needs to use your suggestion at dw-mmc controller, so i have posted it. Best Regards, Jaehoon Chung On 05/26/2014 04:03 PM, Ludovic Desroches wrote: > Hi, > > Sorry I was on vacation, I'll send a cleaner patch updating other drivers > this week. > > Regards > > Ludovic > > On Fri, May 23, 2014 at 01:38:06PM +0900, Jaehoon Chung wrote: >> Hi, All. >> >> This patch is working on progress? >> I want to merge this patch for fixing dw-mmc controller problem. >> >> If this patch didn't work on progress, i will send the patch based-on this patch. >> >> Best Regards, >> Jaehoon Chung >> >> On 05/14/2014 06:53 PM, Ulf Hansson wrote: >>> On 7 May 2014 12:06, Ludovic Desroches <ludovic.desroches@atmel.com> wrote: >>>> Some hosts manage several slots. In these case information such as the bus >>>> width, chip detect and others are into the slot node. So we have to parse >>>> child nodes. If not NULL, slot node will be used instead of the device >>>> node. >>>> >>>> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> >>>> --- >>>> >>>> Hi, >>>> >>>> Since this patch is only a RFC, I have not yet updated drivers using this >>>> function. >>>> >>>> I would like to use mmc_of_parse to reduce code duplication. My issue is that >>>> atmel mci is a bit different from others mci host since it can provide >>>> several slots, so it allocates several mmc hosts. By the way, it is not the >>>> only one. >>>> >>>> When calling mmc_alloc_host, host->parent is set to &pdev->dev. mmc_of_parse >>>> uses host->parent->of_node but in my case settings are in the slot nodes so in >>>> the child nodes. That's why I would like to have a way to tell which node I >>>> want to use. >>> >>> Seems reasonable, thanks for working on this! >>> >>>> >>>> >>>> Regards >>>> >>>> Ludovic >>>> >>>> >>>> >>>> drivers/mmc/core/host.c | 9 +++++++-- >>>> 1 file changed, 7 insertions(+), 2 deletions(-) >>>> >>>> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c >>>> index fdea825..ed6cea5 100644 >>>> --- a/drivers/mmc/core/host.c >>>> +++ b/drivers/mmc/core/host.c >>>> @@ -300,13 +300,15 @@ static inline void mmc_host_clk_sysfs_init(struct mmc_host *host) >>>> /** >>>> * mmc_of_parse() - parse host's device-tree node >>>> * @host: host whose node should be parsed. >>>> + * @slot: some devices provide several slots so the node to parse >>>> + * is not the host one. >>>> * >>>> * To keep the rest of the MMC subsystem unaware of whether DT has been >>>> * used to to instantiate and configure this host instance or not, we >>>> * parse the properties and set respective generic mmc-host flags and >>>> * parameters. >>>> */ >>>> -int mmc_of_parse(struct mmc_host *host) >>>> +int mmc_of_parse(struct mmc_host *host, struct device_node *slot) >>>> { >>>> struct device_node *np; >>>> u32 bus_width; >>>> @@ -317,7 +319,10 @@ int mmc_of_parse(struct mmc_host *host) >>>> if (!host->parent || !host->parent->of_node) >>>> return 0; >>>> >>>> - np = host->parent->of_node; >>>> + if (slot) >>>> + np = slot; >>>> + else >>>> + np = host->parent->of_node; >>>> >>>> /* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */ >>>> if (of_property_read_u32(np, "bus-width", &bus_width) < 0) { >>>> -- >>>> 1.7.9.5 >>>> >>> >>> How about adding a new API, __mmc_of_parse((struct mmc_host *host, >>> struct device_node *slot) >>> Then let the old API mmc_of_parse() remain as is, but let it call the >>> new API with slot == NULL. >>> >>> Atmel can then use the new API, but the other drivers can remain as is. >>> >>> Kind regards >>> Ulf Hansson >>> -- >>> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in >>> the body of a message to majordomo at vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in >> the body of a message to majordomo at vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH RFC] mmc: add slot argument to mmc_of_parse 2014-05-26 7:03 ` Ludovic Desroches 2014-05-26 7:15 ` Jaehoon Chung @ 2014-05-26 7:49 ` Ludovic Desroches 1 sibling, 0 replies; 6+ messages in thread From: Ludovic Desroches @ 2014-05-26 7:49 UTC (permalink / raw) To: linux-arm-kernel On Mon, May 26, 2014 at 09:03:01AM +0200, Ludovic Desroches wrote: > Hi, > > Sorry I was on vacation, I'll send a cleaner patch updating other drivers > this week. Continuing to clear out my inbox, I have seen you send a patch for it. Thanks. > > Regards > > Ludovic > > On Fri, May 23, 2014 at 01:38:06PM +0900, Jaehoon Chung wrote: > > Hi, All. > > > > This patch is working on progress? > > I want to merge this patch for fixing dw-mmc controller problem. > > > > If this patch didn't work on progress, i will send the patch based-on this patch. > > > > Best Regards, > > Jaehoon Chung > > > > On 05/14/2014 06:53 PM, Ulf Hansson wrote: > > > On 7 May 2014 12:06, Ludovic Desroches <ludovic.desroches@atmel.com> wrote: > > >> Some hosts manage several slots. In these case information such as the bus > > >> width, chip detect and others are into the slot node. So we have to parse > > >> child nodes. If not NULL, slot node will be used instead of the device > > >> node. > > >> > > >> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> > > >> --- > > >> > > >> Hi, > > >> > > >> Since this patch is only a RFC, I have not yet updated drivers using this > > >> function. > > >> > > >> I would like to use mmc_of_parse to reduce code duplication. My issue is that > > >> atmel mci is a bit different from others mci host since it can provide > > >> several slots, so it allocates several mmc hosts. By the way, it is not the > > >> only one. > > >> > > >> When calling mmc_alloc_host, host->parent is set to &pdev->dev. mmc_of_parse > > >> uses host->parent->of_node but in my case settings are in the slot nodes so in > > >> the child nodes. That's why I would like to have a way to tell which node I > > >> want to use. > > > > > > Seems reasonable, thanks for working on this! > > > > > >> > > >> > > >> Regards > > >> > > >> Ludovic > > >> > > >> > > >> > > >> drivers/mmc/core/host.c | 9 +++++++-- > > >> 1 file changed, 7 insertions(+), 2 deletions(-) > > >> > > >> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c > > >> index fdea825..ed6cea5 100644 > > >> --- a/drivers/mmc/core/host.c > > >> +++ b/drivers/mmc/core/host.c > > >> @@ -300,13 +300,15 @@ static inline void mmc_host_clk_sysfs_init(struct mmc_host *host) > > >> /** > > >> * mmc_of_parse() - parse host's device-tree node > > >> * @host: host whose node should be parsed. > > >> + * @slot: some devices provide several slots so the node to parse > > >> + * is not the host one. > > >> * > > >> * To keep the rest of the MMC subsystem unaware of whether DT has been > > >> * used to to instantiate and configure this host instance or not, we > > >> * parse the properties and set respective generic mmc-host flags and > > >> * parameters. > > >> */ > > >> -int mmc_of_parse(struct mmc_host *host) > > >> +int mmc_of_parse(struct mmc_host *host, struct device_node *slot) > > >> { > > >> struct device_node *np; > > >> u32 bus_width; > > >> @@ -317,7 +319,10 @@ int mmc_of_parse(struct mmc_host *host) > > >> if (!host->parent || !host->parent->of_node) > > >> return 0; > > >> > > >> - np = host->parent->of_node; > > >> + if (slot) > > >> + np = slot; > > >> + else > > >> + np = host->parent->of_node; > > >> > > >> /* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */ > > >> if (of_property_read_u32(np, "bus-width", &bus_width) < 0) { > > >> -- > > >> 1.7.9.5 > > >> > > > > > > How about adding a new API, __mmc_of_parse((struct mmc_host *host, > > > struct device_node *slot) > > > Then let the old API mmc_of_parse() remain as is, but let it call the > > > new API with slot == NULL. > > > > > > Atmel can then use the new API, but the other drivers can remain as is. > > > > > > Kind regards > > > Ulf Hansson > > > -- > > > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > > > the body of a message to majordomo at vger.kernel.org > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > > the body of a message to majordomo at vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-05-26 7:49 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-05-07 10:06 [PATCH RFC] mmc: add slot argument to mmc_of_parse Ludovic Desroches 2014-05-14 9:53 ` Ulf Hansson 2014-05-23 4:38 ` Jaehoon Chung 2014-05-26 7:03 ` Ludovic Desroches 2014-05-26 7:15 ` Jaehoon Chung 2014-05-26 7:49 ` Ludovic Desroches
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).