| Message ID | 1363360876-13617-13-git-send-email-jon-hunter@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 03/15/2013 10:21 AM, Jon Hunter wrote: > Some of the GPMC timings parameters are currently missing from the GPMC > device-tree binding. Add these parameters to the binding documentation > as well as code to read them. > > The existing code in gpmc_read_timings_dt() is checking the value of > of_property_read_u32() and only is successful storing the value read > in the gpmc_timings structure. Checking the return value in this case > is not necessary and we can simply read the value, if present, and > store directly in the gpmc_timings structure. Therefore, simplify the > code by removing these checks. > > The comment in the gpmc_read_timings_dt() function, "only for OMAP3430" > is also incorrect as it is applicable to all OMAP3+ devices. So correct > this too. > > Signed-off-by: Jon Hunter <jon-hunter@ti.com> > --- > Documentation/devicetree/bindings/bus/ti-gpmc.txt | 25 +++++- > arch/arm/mach-omap2/gpmc.c | 93 ++++++++++----------- > 2 files changed, 66 insertions(+), 52 deletions(-) > > diff --git a/Documentation/devicetree/bindings/bus/ti-gpmc.txt b/Documentation/devicetree/bindings/bus/ti-gpmc.txt > index 6fde1cf..a63bd93 100644 > --- a/Documentation/devicetree/bindings/bus/ti-gpmc.txt > +++ b/Documentation/devicetree/bindings/bus/ti-gpmc.txt > @@ -56,10 +56,27 @@ Timing properties for child nodes. All are optional and default to 0. > - gpmc,oe-off: Deassertion time > > Access time and cycle time timings corresponding to GPMC_CONFIG5: > - - gpmc,page-burst-access: Multiple access word delay > - - gpmc,access: Start-cycle to first data valid delay > - - gpmc,rd-cycle: Total read cycle time > - - gpmc,wr-cycle: Total write cycle time > + - gpmc,page-burst-access: Multiple access word delay > + - gpmc,access: Start-cycle to first data valid delay > + - gpmc,rd-cycle: Total read cycle time > + - gpmc,wr-cycle: Total write cycle time > + - gpmc,bus-turnaround: Turn-around time between successive accesses > + - gpmc,cycle2cycle-delay: Delay between chip-select pulses > + - gpmc,clk-activation: GPMC clock activation time > + - gpmc,wait-monitoring: Start of wait monitoring with regard to valid > + data What units are these in? If in nanoseconds, can you append "-ns" > + > +Boolean timing parameters. If property is present parameter enabled and > +disabled if omitted: > + - gpmc,adv-extra-delay: ADV signal is delayed by half GPMC clock > + - gpmc,cs-extra-delay: CS signal is delayed by half GPMC clock > + - gpmc,cycle2cycle-diffcsen: Add "cycle2cycle-delay" between successive > + accesses to a different CS > + - gpmc,cycle2cycle-samecsen: Add "cycle2cycle-delay" between successive > + accesses to the same CS > + - gpmc,oe-extra-delay: OE signal is delayed by half GPMC clock > + - gpmc,we-extra-delay: WE signal is delayed by half GPMC clock > + - gpmc,time-para-granularity: Multiply all access times by 2 > > The following are only applicable to OMAP3+ and AM335x: > - gpmc,wr-access > diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c > index 85b1a35..c928a8c 100644 > --- a/arch/arm/mach-omap2/gpmc.c > +++ b/arch/arm/mach-omap2/gpmc.c > @@ -1274,67 +1274,64 @@ void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) > static void __maybe_unused gpmc_read_timings_dt(struct device_node *np, > struct gpmc_timings *gpmc_t) > { > - u32 val; > - > memset(gpmc_t, 0, sizeof(*gpmc_t)); > > /* minimum clock period for syncronous mode */ > - if (!of_property_read_u32(np, "gpmc,sync-clk", &val)) > - gpmc_t->sync_clk = val; > + of_property_read_u32(np, "gpmc,sync-clk", &gpmc_t->sync_clk); > > /* chip select timtings */ > - if (!of_property_read_u32(np, "gpmc,cs-on", &val)) > - gpmc_t->cs_on = val; > - > - if (!of_property_read_u32(np, "gpmc,cs-rd-off", &val)) > - gpmc_t->cs_rd_off = val; > - > - if (!of_property_read_u32(np, "gpmc,cs-wr-off", &val)) > - gpmc_t->cs_wr_off = val; > + of_property_read_u32(np, "gpmc,cs-on", &gpmc_t->cs_on); > + of_property_read_u32(np, "gpmc,cs-rd-off", &gpmc_t->cs_rd_off); > + of_property_read_u32(np, "gpmc,cs-wr-off", &gpmc_t->cs_wr_off); > > /* ADV signal timings */ > - if (!of_property_read_u32(np, "gpmc,adv-on", &val)) > - gpmc_t->adv_on = val; > - > - if (!of_property_read_u32(np, "gpmc,adv-rd-off", &val)) > - gpmc_t->adv_rd_off = val; > - > - if (!of_property_read_u32(np, "gpmc,adv-wr-off", &val)) > - gpmc_t->adv_wr_off = val; > + of_property_read_u32(np, "gpmc,adv-on", &gpmc_t->adv_on); > + of_property_read_u32(np, "gpmc,adv-rd-off", &gpmc_t->adv_rd_off); > + of_property_read_u32(np, "gpmc,adv-wr-off", &gpmc_t->adv_wr_off); > > /* WE signal timings */ > - if (!of_property_read_u32(np, "gpmc,we-on", &val)) > - gpmc_t->we_on = val; > - > - if (!of_property_read_u32(np, "gpmc,we-off", &val)) > - gpmc_t->we_off = val; > + of_property_read_u32(np, "gpmc,we-on", &gpmc_t->we_on); > + of_property_read_u32(np, "gpmc,we-off", &gpmc_t->we_off); > > /* OE signal timings */ > - if (!of_property_read_u32(np, "gpmc,oe-on", &val)) > - gpmc_t->oe_on = val; > - > - if (!of_property_read_u32(np, "gpmc,oe-off", &val)) > - gpmc_t->oe_off = val; > + of_property_read_u32(np, "gpmc,oe-on", &gpmc_t->oe_on); > + of_property_read_u32(np, "gpmc,oe-off", &gpmc_t->oe_off); > > /* access and cycle timings */ > - if (!of_property_read_u32(np, "gpmc,page-burst-access", &val)) > - gpmc_t->page_burst_access = val; > - > - if (!of_property_read_u32(np, "gpmc,access", &val)) > - gpmc_t->access = val; > - > - if (!of_property_read_u32(np, "gpmc,rd-cycle", &val)) > - gpmc_t->rd_cycle = val; > - > - if (!of_property_read_u32(np, "gpmc,wr-cycle", &val)) > - gpmc_t->wr_cycle = val; > - > - /* only for OMAP3430 */ > - if (!of_property_read_u32(np, "gpmc,wr-access", &val)) > - gpmc_t->wr_access = val; > - > - if (!of_property_read_u32(np, "gpmc,wr-data-mux-bus", &val)) > - gpmc_t->wr_data_mux_bus = val; > + of_property_read_u32(np, "gpmc,page-burst-access", > + &gpmc_t->page_burst_access); > + of_property_read_u32(np, "gpmc,access", &gpmc_t->access); > + of_property_read_u32(np, "gpmc,rd-cycle", &gpmc_t->rd_cycle); > + of_property_read_u32(np, "gpmc,wr-cycle", &gpmc_t->wr_cycle); > + of_property_read_u32(np, "gpmc,bus-turnaround", > + &gpmc_t->bus_turnaround); > + of_property_read_u32(np, "gpmc,cycle2cycle-delay", > + &gpmc_t->cycle2cycle_delay); > + of_property_read_u32(np, "gpmc,wait-monitoring", > + &gpmc_t->wait_monitoring); > + of_property_read_u32(np, "gpmc,clk-activation", > + &gpmc_t->clk_activation); > + > + /* only applicable to OMAP3+ */ > + of_property_read_u32(np, "gpmc,wr-access", &gpmc_t->wr_access); > + of_property_read_u32(np, "gpmc,wr-data-mux-bus", > + &gpmc_t->wr_data_mux_bus); > + > + /* bool timing parameters */ > + if (of_find_property(np, "gpmc,cycle2cycle-diffcsen", NULL)) > + gpmc_t->bool_timings.cycle2cyclediffcsen = true; > + if (of_find_property(np, "gpmc,cycle2cycle-samecsen", NULL)) > + gpmc_t->bool_timings.cycle2cyclesamecsen = true; > + if (of_find_property(np, "gpmc,we-extra-delay", NULL)) > + gpmc_t->bool_timings.we_extra_delay = true; > + if (of_find_property(np, "gpmc,oe-extra-delay", NULL)) > + gpmc_t->bool_timings.oe_extra_delay = true; > + if (of_find_property(np, "gpmc,adv-extra-delay", NULL)) > + gpmc_t->bool_timings.adv_extra_delay = true; > + if (of_find_property(np, "gpmc,cs-extra-delay", NULL)) > + gpmc_t->bool_timings.cs_extra_delay = true; > + if (of_find_property(np, "gpmc,time-para-granularity", NULL)) > + gpmc_t->bool_timings.time_para_granularity = true; of_property_read_bool doesn't work for these? Rob -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 03/18/2013 09:07 AM, Rob Herring wrote: > On 03/15/2013 10:21 AM, Jon Hunter wrote: >> Some of the GPMC timings parameters are currently missing from the GPMC >> device-tree binding. Add these parameters to the binding documentation >> as well as code to read them. >> >> The existing code in gpmc_read_timings_dt() is checking the value of >> of_property_read_u32() and only is successful storing the value read >> in the gpmc_timings structure. Checking the return value in this case >> is not necessary and we can simply read the value, if present, and >> store directly in the gpmc_timings structure. Therefore, simplify the >> code by removing these checks. >> >> The comment in the gpmc_read_timings_dt() function, "only for OMAP3430" >> is also incorrect as it is applicable to all OMAP3+ devices. So correct >> this too. >> >> Signed-off-by: Jon Hunter <jon-hunter@ti.com> >> --- >> Documentation/devicetree/bindings/bus/ti-gpmc.txt | 25 +++++- >> arch/arm/mach-omap2/gpmc.c | 93 ++++++++++----------- >> 2 files changed, 66 insertions(+), 52 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/bus/ti-gpmc.txt b/Documentation/devicetree/bindings/bus/ti-gpmc.txt >> index 6fde1cf..a63bd93 100644 >> --- a/Documentation/devicetree/bindings/bus/ti-gpmc.txt >> +++ b/Documentation/devicetree/bindings/bus/ti-gpmc.txt >> @@ -56,10 +56,27 @@ Timing properties for child nodes. All are optional and default to 0. >> - gpmc,oe-off: Deassertion time >> >> Access time and cycle time timings corresponding to GPMC_CONFIG5: >> - - gpmc,page-burst-access: Multiple access word delay >> - - gpmc,access: Start-cycle to first data valid delay >> - - gpmc,rd-cycle: Total read cycle time >> - - gpmc,wr-cycle: Total write cycle time >> + - gpmc,page-burst-access: Multiple access word delay >> + - gpmc,access: Start-cycle to first data valid delay >> + - gpmc,rd-cycle: Total read cycle time >> + - gpmc,wr-cycle: Total write cycle time >> + - gpmc,bus-turnaround: Turn-around time between successive accesses >> + - gpmc,cycle2cycle-delay: Delay between chip-select pulses >> + - gpmc,clk-activation: GPMC clock activation time >> + - gpmc,wait-monitoring: Start of wait monitoring with regard to valid >> + data > > What units are these in? If in nanoseconds, can you append "-ns" These are cycles. I can update the comment to reflect that. >> + >> +Boolean timing parameters. If property is present parameter enabled and >> +disabled if omitted: >> + - gpmc,adv-extra-delay: ADV signal is delayed by half GPMC clock >> + - gpmc,cs-extra-delay: CS signal is delayed by half GPMC clock >> + - gpmc,cycle2cycle-diffcsen: Add "cycle2cycle-delay" between successive >> + accesses to a different CS >> + - gpmc,cycle2cycle-samecsen: Add "cycle2cycle-delay" between successive >> + accesses to the same CS >> + - gpmc,oe-extra-delay: OE signal is delayed by half GPMC clock >> + - gpmc,we-extra-delay: WE signal is delayed by half GPMC clock >> + - gpmc,time-para-granularity: Multiply all access times by 2 >> >> The following are only applicable to OMAP3+ and AM335x: >> - gpmc,wr-access >> diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c >> index 85b1a35..c928a8c 100644 >> --- a/arch/arm/mach-omap2/gpmc.c >> +++ b/arch/arm/mach-omap2/gpmc.c >> @@ -1274,67 +1274,64 @@ void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) >> static void __maybe_unused gpmc_read_timings_dt(struct device_node *np, >> struct gpmc_timings *gpmc_t) >> { >> - u32 val; >> - >> memset(gpmc_t, 0, sizeof(*gpmc_t)); >> >> /* minimum clock period for syncronous mode */ >> - if (!of_property_read_u32(np, "gpmc,sync-clk", &val)) >> - gpmc_t->sync_clk = val; >> + of_property_read_u32(np, "gpmc,sync-clk", &gpmc_t->sync_clk); >> >> /* chip select timtings */ >> - if (!of_property_read_u32(np, "gpmc,cs-on", &val)) >> - gpmc_t->cs_on = val; >> - >> - if (!of_property_read_u32(np, "gpmc,cs-rd-off", &val)) >> - gpmc_t->cs_rd_off = val; >> - >> - if (!of_property_read_u32(np, "gpmc,cs-wr-off", &val)) >> - gpmc_t->cs_wr_off = val; >> + of_property_read_u32(np, "gpmc,cs-on", &gpmc_t->cs_on); >> + of_property_read_u32(np, "gpmc,cs-rd-off", &gpmc_t->cs_rd_off); >> + of_property_read_u32(np, "gpmc,cs-wr-off", &gpmc_t->cs_wr_off); >> >> /* ADV signal timings */ >> - if (!of_property_read_u32(np, "gpmc,adv-on", &val)) >> - gpmc_t->adv_on = val; >> - >> - if (!of_property_read_u32(np, "gpmc,adv-rd-off", &val)) >> - gpmc_t->adv_rd_off = val; >> - >> - if (!of_property_read_u32(np, "gpmc,adv-wr-off", &val)) >> - gpmc_t->adv_wr_off = val; >> + of_property_read_u32(np, "gpmc,adv-on", &gpmc_t->adv_on); >> + of_property_read_u32(np, "gpmc,adv-rd-off", &gpmc_t->adv_rd_off); >> + of_property_read_u32(np, "gpmc,adv-wr-off", &gpmc_t->adv_wr_off); >> >> /* WE signal timings */ >> - if (!of_property_read_u32(np, "gpmc,we-on", &val)) >> - gpmc_t->we_on = val; >> - >> - if (!of_property_read_u32(np, "gpmc,we-off", &val)) >> - gpmc_t->we_off = val; >> + of_property_read_u32(np, "gpmc,we-on", &gpmc_t->we_on); >> + of_property_read_u32(np, "gpmc,we-off", &gpmc_t->we_off); >> >> /* OE signal timings */ >> - if (!of_property_read_u32(np, "gpmc,oe-on", &val)) >> - gpmc_t->oe_on = val; >> - >> - if (!of_property_read_u32(np, "gpmc,oe-off", &val)) >> - gpmc_t->oe_off = val; >> + of_property_read_u32(np, "gpmc,oe-on", &gpmc_t->oe_on); >> + of_property_read_u32(np, "gpmc,oe-off", &gpmc_t->oe_off); >> >> /* access and cycle timings */ >> - if (!of_property_read_u32(np, "gpmc,page-burst-access", &val)) >> - gpmc_t->page_burst_access = val; >> - >> - if (!of_property_read_u32(np, "gpmc,access", &val)) >> - gpmc_t->access = val; >> - >> - if (!of_property_read_u32(np, "gpmc,rd-cycle", &val)) >> - gpmc_t->rd_cycle = val; >> - >> - if (!of_property_read_u32(np, "gpmc,wr-cycle", &val)) >> - gpmc_t->wr_cycle = val; >> - >> - /* only for OMAP3430 */ >> - if (!of_property_read_u32(np, "gpmc,wr-access", &val)) >> - gpmc_t->wr_access = val; >> - >> - if (!of_property_read_u32(np, "gpmc,wr-data-mux-bus", &val)) >> - gpmc_t->wr_data_mux_bus = val; >> + of_property_read_u32(np, "gpmc,page-burst-access", >> + &gpmc_t->page_burst_access); >> + of_property_read_u32(np, "gpmc,access", &gpmc_t->access); >> + of_property_read_u32(np, "gpmc,rd-cycle", &gpmc_t->rd_cycle); >> + of_property_read_u32(np, "gpmc,wr-cycle", &gpmc_t->wr_cycle); >> + of_property_read_u32(np, "gpmc,bus-turnaround", >> + &gpmc_t->bus_turnaround); >> + of_property_read_u32(np, "gpmc,cycle2cycle-delay", >> + &gpmc_t->cycle2cycle_delay); >> + of_property_read_u32(np, "gpmc,wait-monitoring", >> + &gpmc_t->wait_monitoring); >> + of_property_read_u32(np, "gpmc,clk-activation", >> + &gpmc_t->clk_activation); >> + >> + /* only applicable to OMAP3+ */ >> + of_property_read_u32(np, "gpmc,wr-access", &gpmc_t->wr_access); >> + of_property_read_u32(np, "gpmc,wr-data-mux-bus", >> + &gpmc_t->wr_data_mux_bus); >> + >> + /* bool timing parameters */ >> + if (of_find_property(np, "gpmc,cycle2cycle-diffcsen", NULL)) >> + gpmc_t->bool_timings.cycle2cyclediffcsen = true; >> + if (of_find_property(np, "gpmc,cycle2cycle-samecsen", NULL)) >> + gpmc_t->bool_timings.cycle2cyclesamecsen = true; >> + if (of_find_property(np, "gpmc,we-extra-delay", NULL)) >> + gpmc_t->bool_timings.we_extra_delay = true; >> + if (of_find_property(np, "gpmc,oe-extra-delay", NULL)) >> + gpmc_t->bool_timings.oe_extra_delay = true; >> + if (of_find_property(np, "gpmc,adv-extra-delay", NULL)) >> + gpmc_t->bool_timings.adv_extra_delay = true; >> + if (of_find_property(np, "gpmc,cs-extra-delay", NULL)) >> + gpmc_t->bool_timings.cs_extra_delay = true; >> + if (of_find_property(np, "gpmc,time-para-granularity", NULL)) >> + gpmc_t->bool_timings.time_para_granularity = true; > > of_property_read_bool doesn't work for these? It should work fine, I wasn't aware of that. Will change. Cheers Jon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 03/18/2013 09:32 AM, Jon Hunter wrote: > > On 03/18/2013 09:07 AM, Rob Herring wrote: >> On 03/15/2013 10:21 AM, Jon Hunter wrote: >>> Some of the GPMC timings parameters are currently missing from the GPMC >>> device-tree binding. Add these parameters to the binding documentation >>> as well as code to read them. >>> >>> The existing code in gpmc_read_timings_dt() is checking the value of >>> of_property_read_u32() and only is successful storing the value read >>> in the gpmc_timings structure. Checking the return value in this case >>> is not necessary and we can simply read the value, if present, and >>> store directly in the gpmc_timings structure. Therefore, simplify the >>> code by removing these checks. >>> >>> The comment in the gpmc_read_timings_dt() function, "only for OMAP3430" >>> is also incorrect as it is applicable to all OMAP3+ devices. So correct >>> this too. >>> >>> Signed-off-by: Jon Hunter <jon-hunter@ti.com> >>> --- >>> Documentation/devicetree/bindings/bus/ti-gpmc.txt | 25 +++++- >>> arch/arm/mach-omap2/gpmc.c | 93 ++++++++++----------- >>> 2 files changed, 66 insertions(+), 52 deletions(-) >>> >>> diff --git a/Documentation/devicetree/bindings/bus/ti-gpmc.txt b/Documentation/devicetree/bindings/bus/ti-gpmc.txt >>> index 6fde1cf..a63bd93 100644 >>> --- a/Documentation/devicetree/bindings/bus/ti-gpmc.txt >>> +++ b/Documentation/devicetree/bindings/bus/ti-gpmc.txt >>> @@ -56,10 +56,27 @@ Timing properties for child nodes. All are optional and default to 0. >>> - gpmc,oe-off: Deassertion time >>> >>> Access time and cycle time timings corresponding to GPMC_CONFIG5: >>> - - gpmc,page-burst-access: Multiple access word delay >>> - - gpmc,access: Start-cycle to first data valid delay >>> - - gpmc,rd-cycle: Total read cycle time >>> - - gpmc,wr-cycle: Total write cycle time >>> + - gpmc,page-burst-access: Multiple access word delay >>> + - gpmc,access: Start-cycle to first data valid delay >>> + - gpmc,rd-cycle: Total read cycle time >>> + - gpmc,wr-cycle: Total write cycle time >>> + - gpmc,bus-turnaround: Turn-around time between successive accesses >>> + - gpmc,cycle2cycle-delay: Delay between chip-select pulses >>> + - gpmc,clk-activation: GPMC clock activation time >>> + - gpmc,wait-monitoring: Start of wait monitoring with regard to valid >>> + data >> >> What units are these in? If in nanoseconds, can you append "-ns" > > These are cycles. I can update the comment to reflect that. Sorry these are nanoseconds. I will update the properties to reflect that. Jon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/bus/ti-gpmc.txt b/Documentation/devicetree/bindings/bus/ti-gpmc.txt index 6fde1cf..a63bd93 100644 --- a/Documentation/devicetree/bindings/bus/ti-gpmc.txt +++ b/Documentation/devicetree/bindings/bus/ti-gpmc.txt @@ -56,10 +56,27 @@ Timing properties for child nodes. All are optional and default to 0. - gpmc,oe-off: Deassertion time Access time and cycle time timings corresponding to GPMC_CONFIG5: - - gpmc,page-burst-access: Multiple access word delay - - gpmc,access: Start-cycle to first data valid delay - - gpmc,rd-cycle: Total read cycle time - - gpmc,wr-cycle: Total write cycle time + - gpmc,page-burst-access: Multiple access word delay + - gpmc,access: Start-cycle to first data valid delay + - gpmc,rd-cycle: Total read cycle time + - gpmc,wr-cycle: Total write cycle time + - gpmc,bus-turnaround: Turn-around time between successive accesses + - gpmc,cycle2cycle-delay: Delay between chip-select pulses + - gpmc,clk-activation: GPMC clock activation time + - gpmc,wait-monitoring: Start of wait monitoring with regard to valid + data + +Boolean timing parameters. If property is present parameter enabled and +disabled if omitted: + - gpmc,adv-extra-delay: ADV signal is delayed by half GPMC clock + - gpmc,cs-extra-delay: CS signal is delayed by half GPMC clock + - gpmc,cycle2cycle-diffcsen: Add "cycle2cycle-delay" between successive + accesses to a different CS + - gpmc,cycle2cycle-samecsen: Add "cycle2cycle-delay" between successive + accesses to the same CS + - gpmc,oe-extra-delay: OE signal is delayed by half GPMC clock + - gpmc,we-extra-delay: WE signal is delayed by half GPMC clock + - gpmc,time-para-granularity: Multiply all access times by 2 The following are only applicable to OMAP3+ and AM335x: - gpmc,wr-access diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c index 85b1a35..c928a8c 100644 --- a/arch/arm/mach-omap2/gpmc.c +++ b/arch/arm/mach-omap2/gpmc.c @@ -1274,67 +1274,64 @@ void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) static void __maybe_unused gpmc_read_timings_dt(struct device_node *np, struct gpmc_timings *gpmc_t) { - u32 val; - memset(gpmc_t, 0, sizeof(*gpmc_t)); /* minimum clock period for syncronous mode */ - if (!of_property_read_u32(np, "gpmc,sync-clk", &val)) - gpmc_t->sync_clk = val; + of_property_read_u32(np, "gpmc,sync-clk", &gpmc_t->sync_clk); /* chip select timtings */ - if (!of_property_read_u32(np, "gpmc,cs-on", &val)) - gpmc_t->cs_on = val; - - if (!of_property_read_u32(np, "gpmc,cs-rd-off", &val)) - gpmc_t->cs_rd_off = val; - - if (!of_property_read_u32(np, "gpmc,cs-wr-off", &val)) - gpmc_t->cs_wr_off = val; + of_property_read_u32(np, "gpmc,cs-on", &gpmc_t->cs_on); + of_property_read_u32(np, "gpmc,cs-rd-off", &gpmc_t->cs_rd_off); + of_property_read_u32(np, "gpmc,cs-wr-off", &gpmc_t->cs_wr_off); /* ADV signal timings */ - if (!of_property_read_u32(np, "gpmc,adv-on", &val)) - gpmc_t->adv_on = val; - - if (!of_property_read_u32(np, "gpmc,adv-rd-off", &val)) - gpmc_t->adv_rd_off = val; - - if (!of_property_read_u32(np, "gpmc,adv-wr-off", &val)) - gpmc_t->adv_wr_off = val; + of_property_read_u32(np, "gpmc,adv-on", &gpmc_t->adv_on); + of_property_read_u32(np, "gpmc,adv-rd-off", &gpmc_t->adv_rd_off); + of_property_read_u32(np, "gpmc,adv-wr-off", &gpmc_t->adv_wr_off); /* WE signal timings */ - if (!of_property_read_u32(np, "gpmc,we-on", &val)) - gpmc_t->we_on = val; - - if (!of_property_read_u32(np, "gpmc,we-off", &val)) - gpmc_t->we_off = val; + of_property_read_u32(np, "gpmc,we-on", &gpmc_t->we_on); + of_property_read_u32(np, "gpmc,we-off", &gpmc_t->we_off); /* OE signal timings */ - if (!of_property_read_u32(np, "gpmc,oe-on", &val)) - gpmc_t->oe_on = val; - - if (!of_property_read_u32(np, "gpmc,oe-off", &val)) - gpmc_t->oe_off = val; + of_property_read_u32(np, "gpmc,oe-on", &gpmc_t->oe_on); + of_property_read_u32(np, "gpmc,oe-off", &gpmc_t->oe_off); /* access and cycle timings */ - if (!of_property_read_u32(np, "gpmc,page-burst-access", &val)) - gpmc_t->page_burst_access = val; - - if (!of_property_read_u32(np, "gpmc,access", &val)) - gpmc_t->access = val; - - if (!of_property_read_u32(np, "gpmc,rd-cycle", &val)) - gpmc_t->rd_cycle = val; - - if (!of_property_read_u32(np, "gpmc,wr-cycle", &val)) - gpmc_t->wr_cycle = val; - - /* only for OMAP3430 */ - if (!of_property_read_u32(np, "gpmc,wr-access", &val)) - gpmc_t->wr_access = val; - - if (!of_property_read_u32(np, "gpmc,wr-data-mux-bus", &val)) - gpmc_t->wr_data_mux_bus = val; + of_property_read_u32(np, "gpmc,page-burst-access", + &gpmc_t->page_burst_access); + of_property_read_u32(np, "gpmc,access", &gpmc_t->access); + of_property_read_u32(np, "gpmc,rd-cycle", &gpmc_t->rd_cycle); + of_property_read_u32(np, "gpmc,wr-cycle", &gpmc_t->wr_cycle); + of_property_read_u32(np, "gpmc,bus-turnaround", + &gpmc_t->bus_turnaround); + of_property_read_u32(np, "gpmc,cycle2cycle-delay", + &gpmc_t->cycle2cycle_delay); + of_property_read_u32(np, "gpmc,wait-monitoring", + &gpmc_t->wait_monitoring); + of_property_read_u32(np, "gpmc,clk-activation", + &gpmc_t->clk_activation); + + /* only applicable to OMAP3+ */ + of_property_read_u32(np, "gpmc,wr-access", &gpmc_t->wr_access); + of_property_read_u32(np, "gpmc,wr-data-mux-bus", + &gpmc_t->wr_data_mux_bus); + + /* bool timing parameters */ + if (of_find_property(np, "gpmc,cycle2cycle-diffcsen", NULL)) + gpmc_t->bool_timings.cycle2cyclediffcsen = true; + if (of_find_property(np, "gpmc,cycle2cycle-samecsen", NULL)) + gpmc_t->bool_timings.cycle2cyclesamecsen = true; + if (of_find_property(np, "gpmc,we-extra-delay", NULL)) + gpmc_t->bool_timings.we_extra_delay = true; + if (of_find_property(np, "gpmc,oe-extra-delay", NULL)) + gpmc_t->bool_timings.oe_extra_delay = true; + if (of_find_property(np, "gpmc,adv-extra-delay", NULL)) + gpmc_t->bool_timings.adv_extra_delay = true; + if (of_find_property(np, "gpmc,cs-extra-delay", NULL)) + gpmc_t->bool_timings.cs_extra_delay = true; + if (of_find_property(np, "gpmc,time-para-granularity", NULL)) + gpmc_t->bool_timings.time_para_granularity = true; } #ifdef CONFIG_MTD_NAND
Some of the GPMC timings parameters are currently missing from the GPMC device-tree binding. Add these parameters to the binding documentation as well as code to read them. The existing code in gpmc_read_timings_dt() is checking the value of of_property_read_u32() and only is successful storing the value read in the gpmc_timings structure. Checking the return value in this case is not necessary and we can simply read the value, if present, and store directly in the gpmc_timings structure. Therefore, simplify the code by removing these checks. The comment in the gpmc_read_timings_dt() function, "only for OMAP3430" is also incorrect as it is applicable to all OMAP3+ devices. So correct this too. Signed-off-by: Jon Hunter <jon-hunter@ti.com> --- Documentation/devicetree/bindings/bus/ti-gpmc.txt | 25 +++++- arch/arm/mach-omap2/gpmc.c | 93 ++++++++++----------- 2 files changed, 66 insertions(+), 52 deletions(-)