Message ID | f9cb28fc-6a68-42b8-bdc0-9ad0941de977@BN1AFFO11FD013.protection.gbl |
---|---|
State | Superseded |
Headers | show |
Hi, On Mon, Jul 28, 2014 at 08:57:15PM +0530, Punnaiah Choudary Kalluri wrote: > Add pl353 static memory controller devicetree binding information. > > Signed-off-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com> > --- > Changes in v4: > - none > Changes in v3: > - none > Changes in v2: > - modified timing binding info as per onfi timing parameters ^^^ There were other comments here: http://lists.infradead.org/pipermail/linux-mtd/2014-April/053488.html You don't need or want these timing parameters at all, I don't think. > - add suffix nano second as timing unit > - modified the clock names as per the IP spec > --- > .../bindings/memory-controllers/pl353-smc.txt | 53 ++++++++++++++++++++ > 1 files changed, 53 insertions(+), 0 deletions(-) > create mode 100644 Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt > > diff --git a/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt b/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt > new file mode 100644 > index 0000000..c1f011d > --- /dev/null > +++ b/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt > @@ -0,0 +1,53 @@ > +Device tree bindings for ARM PL353 static memory controller > + > +PL353 static memory controller supports two kinds of memory > +interfaces.i.e NAND and SRAM/NOR interfaces. > +The actual devices are instantiated from the child nodes of pl353 smc node. > + > +Required properties: > +- compatible : Should be "arm,pl353-smc-r2p1" > +- reg : Controller registers map and length. > +- clock-names : List of input clock names - "memclk", "aclk" > + (See clock bindings for details). > +- clocks : Clock phandles (see clock bindings for details). > +- address-cells : Address cells, must be 1. > +- size-cells : Size cells. Must be 1. > + > +Child nodes: > + For NAND the "arm,pl353-nand-r2p1" and for NOR the "cfi-flash" drivers are > +supported as child nodes. > + > +Mandatory timing properties for child nodes: > +- nand-tRC-ns : Read cycle time. > +- nand-tWC-ns : Write cycle time. > +- nand-tREA-ns : re_n assertion delay. > +- nand-tWP-ns : we_n de-assertion delay. > +- nand-tCLR-ns : Status read time > +- nand-tAR-ns : ID read time > +- nand-tRR-ns : busy to re_n These properties should probably be dropped. Look in l2-mtd.git, where we now have drivers/mtd/nand/nand_timings.c to define the ONFI timing modes, which can be auto-detected (look at struct nand_onfi_params::async_timing_mode). Boris also has pending patches for non-ONFI chips. > +for nand partition information please refer the below file > +Documentation/devicetree/bindings/mtd/partition.txt > + > +Example: > + pl353smcc_0: pl353smcc@e000e000 { > + compatible = "arm,pl353-smcc-r2p1" > + clock-names = "memclk", "aclk"; > + clocks = <&clkc 11>, <&clkc 44>; > + reg = <0xe000e000 0x1000>; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges; > + nand_0: nand@e1000000 { > + compatible = "arm,pl353-nand-r2p1" > + reg = <0xe1000000 0x1000000>; > + nand-tRC-ns = <40>; > + nand-tWC-ns = <40>; > + nand-tREA-ns = <10>; > + nand-tWP-ns = <20>; > + nand-tCLR-ns = <20>; > + nand-tAR-ns = <20>; > + nand-tRR-ns = <40>; > + (...) > + }; > + }; Brian
Hi Brian, >-----Original Message----- >From: Brian Norris [mailto:computersforpeace@gmail.com] >Sent: Thursday, July 31, 2014 12:48 PM >To: Punnaiah Choudary Kalluri >Cc: robh+dt@kernel.org; pawel.moll@arm.com; mark.rutland@arm.com; >ijc+devicetree@hellion.org.uk; galak@codeaurora.org; rob@landley.net; >Michal Simek; grant.likely@linaro.org; gregkh@linuxfoundation.org; >jason@lakedaemon.net; ezequiel.garcia@free-electrons.com; >arnd@arndb.de; dwmw2@infradead.org; artem.bityutskiy@linux.intel.com; >pekon@ti.com; jussi.kivilinna@iki.fi; acourbot@nvidia.com; >ivan.khoronzhuk@ti.com; joern@logfs.org; devicetree@vger.kernel.org; >linux-doc@vger.kernel.org; linux-kernel@vger.kernel.org; linux- >mtd@lists.infradead.org; kpc528@gmail.com; >kalluripunnaiahchoudary@gmail.com; Anirudha Sarangi; Srikanth Vemula; >Punnaiah Choudary Kalluri; Boris Brezillon >Subject: Re: [PATCH RFC v4 1/2] Devicetree: Add pl353 smc controller >devicetree binding information > >Hi, > >On Mon, Jul 28, 2014 at 08:57:15PM +0530, Punnaiah Choudary Kalluri wrote: >> Add pl353 static memory controller devicetree binding information. >> >> Signed-off-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com> >> --- >> Changes in v4: >> - none >> Changes in v3: >> - none >> Changes in v2: >> - modified timing binding info as per onfi timing parameters > >^^^ There were other comments here: > > http://lists.infradead.org/pipermail/linux-mtd/2014-April/053488.html > >You don't need or want these timing parameters at all, I don't think. Ok. Understood > >> - add suffix nano second as timing unit >> - modified the clock names as per the IP spec >> --- >> .../bindings/memory-controllers/pl353-smc.txt | 53 >++++++++++++++++++++ >> 1 files changed, 53 insertions(+), 0 deletions(-) >> create mode 100644 Documentation/devicetree/bindings/memory- >controllers/pl353-smc.txt >> >> diff --git a/Documentation/devicetree/bindings/memory-controllers/pl353- >smc.txt b/Documentation/devicetree/bindings/memory-controllers/pl353- >smc.txt >> new file mode 100644 >> index 0000000..c1f011d >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/memory-controllers/pl353- >smc.txt >> @@ -0,0 +1,53 @@ >> +Device tree bindings for ARM PL353 static memory controller >> + >> +PL353 static memory controller supports two kinds of memory >> +interfaces.i.e NAND and SRAM/NOR interfaces. >> +The actual devices are instantiated from the child nodes of pl353 smc node. >> + >> +Required properties: >> +- compatible : Should be "arm,pl353-smc-r2p1" >> +- reg : Controller registers map and length. >> +- clock-names : List of input clock names - "memclk", "aclk" >> + (See clock bindings for details). >> +- clocks : Clock phandles (see clock bindings for details). >> +- address-cells : Address cells, must be 1. >> +- size-cells : Size cells. Must be 1. >> + >> +Child nodes: >> + For NAND the "arm,pl353-nand-r2p1" and for NOR the "cfi-flash" drivers >are >> +supported as child nodes. >> + >> +Mandatory timing properties for child nodes: >> +- nand-tRC-ns : Read cycle time. >> +- nand-tWC-ns : Write cycle time. >> +- nand-tREA-ns : re_n assertion delay. >> +- nand-tWP-ns : we_n de-assertion delay. >> +- nand-tCLR-ns : Status read time >> +- nand-tAR-ns : ID read time >> +- nand-tRR-ns : busy to re_n > >These properties should probably be dropped. Look in l2-mtd.git, where >we now have drivers/mtd/nand/nand_timings.c to define the ONFI timing >modes, which can be auto-detected (look at struct >nand_onfi_params::async_timing_mode). Boris also has pending patches for >non-ONFI chips. Ok, Thanks. I will check the implementation for onfi timing configuration and I will use it. Regards, Punnaiah > >> +for nand partition information please refer the below file >> +Documentation/devicetree/bindings/mtd/partition.txt >> + >> +Example: >> + pl353smcc_0: pl353smcc@e000e000 { >> + compatible = "arm,pl353-smcc-r2p1" >> + clock-names = "memclk", "aclk"; >> + clocks = <&clkc 11>, <&clkc 44>; >> + reg = <0xe000e000 0x1000>; >> + #address-cells = <1>; >> + #size-cells = <1>; >> + ranges; >> + nand_0: nand@e1000000 { >> + compatible = "arm,pl353-nand-r2p1" >> + reg = <0xe1000000 0x1000000>; >> + nand-tRC-ns = <40>; >> + nand-tWC-ns = <40>; >> + nand-tREA-ns = <10>; >> + nand-tWP-ns = <20>; >> + nand-tCLR-ns = <20>; >> + nand-tAR-ns = <20>; >> + nand-tRR-ns = <40>; >> + (...) >> + }; >> + }; > >Brian
diff --git a/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt b/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt new file mode 100644 index 0000000..c1f011d --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt @@ -0,0 +1,53 @@ +Device tree bindings for ARM PL353 static memory controller + +PL353 static memory controller supports two kinds of memory +interfaces.i.e NAND and SRAM/NOR interfaces. +The actual devices are instantiated from the child nodes of pl353 smc node. + +Required properties: +- compatible : Should be "arm,pl353-smc-r2p1" +- reg : Controller registers map and length. +- clock-names : List of input clock names - "memclk", "aclk" + (See clock bindings for details). +- clocks : Clock phandles (see clock bindings for details). +- address-cells : Address cells, must be 1. +- size-cells : Size cells. Must be 1. + +Child nodes: + For NAND the "arm,pl353-nand-r2p1" and for NOR the "cfi-flash" drivers are +supported as child nodes. + +Mandatory timing properties for child nodes: +- nand-tRC-ns : Read cycle time. +- nand-tWC-ns : Write cycle time. +- nand-tREA-ns : re_n assertion delay. +- nand-tWP-ns : we_n de-assertion delay. +- nand-tCLR-ns : Status read time +- nand-tAR-ns : ID read time +- nand-tRR-ns : busy to re_n + +for nand partition information please refer the below file +Documentation/devicetree/bindings/mtd/partition.txt + +Example: + pl353smcc_0: pl353smcc@e000e000 { + compatible = "arm,pl353-smcc-r2p1" + clock-names = "memclk", "aclk"; + clocks = <&clkc 11>, <&clkc 44>; + reg = <0xe000e000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + ranges; + nand_0: nand@e1000000 { + compatible = "arm,pl353-nand-r2p1" + reg = <0xe1000000 0x1000000>; + nand-tRC-ns = <40>; + nand-tWC-ns = <40>; + nand-tREA-ns = <10>; + nand-tWP-ns = <20>; + nand-tCLR-ns = <20>; + nand-tAR-ns = <20>; + nand-tRR-ns = <40>; + (...) + }; + };
Add pl353 static memory controller devicetree binding information. Signed-off-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com> --- Changes in v4: - none Changes in v3: - none Changes in v2: - modified timing binding info as per onfi timing parameters - add suffix nano second as timing unit - modified the clock names as per the IP spec --- .../bindings/memory-controllers/pl353-smc.txt | 53 ++++++++++++++++++++ 1 files changed, 53 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/memory-controllers/pl353-smc.txt