| Message ID | 20220815050815.22340-6-samuel@sholland.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | riscv: Allwinner D1 platform support | expand |
On 15/08/2022 06:08, Samuel Holland wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > Allwinner manufactures the sunxi family of application processors. This > includes the "sun8i" series of ARMv7 SoCs, the "sun50i" series of ARMv8 > SoCs, and now the "sun20i" series of 64-bit RISC-V SoCs. > > The first SoC in the sun20i series is D1, containing a single T-HEAD > C906 core. D1s is a low-pin-count variant of D1 with co-packaged DRAM. > > Most peripherals are shared across the entire chip family. In fact, the > ARMv7 T113 SoC is pin-compatible and almost entirely register-compatible > with the D1s. > > This means many existing device drivers can be reused. To facilitate > this reuse, name the symbol ARCH_SUNXI, since that is what the existing > drivers have as their dependency. Hey Samuel, I think this and patch 12/12 with the defconfig changes should be deferred until post LPC (which still leaves plenty of time for making the 6.1 merge window). We already have like 4 different approaches between the existing SOC_FOO symbols & two more when D1 stuff and the Renesas stuff is considered. Plan is to decide at LPC on one approach for what to do with Kconfig.socs & to me it seems like a good idea to do what's being done here - it's likely that further arm vendors will move and keeping the common symbols makes a lot of sense to me... Thanks, Conor. > > Signed-off-by: Samuel Holland <samuel@sholland.org> > --- > > arch/riscv/Kconfig.socs | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs > index 69774bb362d6..1caacbfac1a5 100644 > --- a/arch/riscv/Kconfig.socs > +++ b/arch/riscv/Kconfig.socs > @@ -1,5 +1,14 @@ > menu "SoC selection" > > +config ARCH_SUNXI > + bool "Allwinner sun20i SoCs" > + select ERRATA_THEAD if MMU && !XIP_KERNEL > + select SIFIVE_PLIC > + select SUN4I_TIMER > + help > + This enables support for Allwinner sun20i platform hardware, > + including boards based on the D1 and D1s SoCs. > + > config SOC_MICROCHIP_POLARFIRE > bool "Microchip PolarFire SoCs" > select MCHP_CLK_MPFS > -- > 2.35.1 >
Am Montag, 15. August 2022, 07:08:08 CEST schrieb Samuel Holland: > Allwinner manufactures the sunxi family of application processors. This > includes the "sun8i" series of ARMv7 SoCs, the "sun50i" series of ARMv8 > SoCs, and now the "sun20i" series of 64-bit RISC-V SoCs. > > The first SoC in the sun20i series is D1, containing a single T-HEAD > C906 core. D1s is a low-pin-count variant of D1 with co-packaged DRAM. > > Most peripherals are shared across the entire chip family. In fact, the > ARMv7 T113 SoC is pin-compatible and almost entirely register-compatible > with the D1s. > > This means many existing device drivers can be reused. To facilitate > this reuse, name the symbol ARCH_SUNXI, since that is what the existing > drivers have as their dependency. > > Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Heiko Stuebner <heiko@sntech.de>
Am Montag, 15. August 2022, 18:56:23 CEST schrieb Conor.Dooley@microchip.com: > On 15/08/2022 06:08, Samuel Holland wrote: > > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > > > Allwinner manufactures the sunxi family of application processors. This > > includes the "sun8i" series of ARMv7 SoCs, the "sun50i" series of ARMv8 > > SoCs, and now the "sun20i" series of 64-bit RISC-V SoCs. > > > > The first SoC in the sun20i series is D1, containing a single T-HEAD > > C906 core. D1s is a low-pin-count variant of D1 with co-packaged DRAM. > > > > Most peripherals are shared across the entire chip family. In fact, the > > ARMv7 T113 SoC is pin-compatible and almost entirely register-compatible > > with the D1s. > > > > This means many existing device drivers can be reused. To facilitate > > this reuse, name the symbol ARCH_SUNXI, since that is what the existing > > drivers have as their dependency. > > Hey Samuel, > I think this and patch 12/12 with the defconfig changes should be > deferred until post LPC (which still leaves plenty of time for > making the 6.1 merge window). We already have like 4 different > approaches between the existing SOC_FOO symbols & two more when > D1 stuff and the Renesas stuff is considered. On the other hand, I don't really think it's that hard to change things after the fact? I.e. ARCH_SUNXI is pretty much set in stone anyway, so there isn't very much that _could_ change without affecting most driver subsystems in the kernel. So I don't think we'd actually need to wait with the Allwinner symbol. Heiko > Plan is to decide at LPC on one approach for what to do with > Kconfig.socs & to me it seems like a good idea to do what's being > done here - it's likely that further arm vendors will move and > keeping the common symbols makes a lot of sense to me... > > Thanks, > Conor. > > > > > Signed-off-by: Samuel Holland <samuel@sholland.org> > > --- > > > > arch/riscv/Kconfig.socs | 9 +++++++++ > > 1 file changed, 9 insertions(+) > > > > diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs > > index 69774bb362d6..1caacbfac1a5 100644 > > --- a/arch/riscv/Kconfig.socs > > +++ b/arch/riscv/Kconfig.socs > > @@ -1,5 +1,14 @@ > > menu "SoC selection" > > > > +config ARCH_SUNXI > > + bool "Allwinner sun20i SoCs" > > + select ERRATA_THEAD if MMU && !XIP_KERNEL > > + select SIFIVE_PLIC > > + select SUN4I_TIMER > > + help > > + This enables support for Allwinner sun20i platform hardware, > > + including boards based on the D1 and D1s SoCs. > > + > > config SOC_MICROCHIP_POLARFIRE > > bool "Microchip PolarFire SoCs" > > select MCHP_CLK_MPFS > > -- > > 2.35.1 > > > > _______________________________________________ > linux-riscv mailing list > linux-riscv@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-riscv >
On 16/08/2022 10:17, Heiko Stübner wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > Am Montag, 15. August 2022, 18:56:23 CEST schrieb Conor.Dooley@microchip.com: >> On 15/08/2022 06:08, Samuel Holland wrote: >>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe >>> >>> Allwinner manufactures the sunxi family of application processors. This >>> includes the "sun8i" series of ARMv7 SoCs, the "sun50i" series of ARMv8 >>> SoCs, and now the "sun20i" series of 64-bit RISC-V SoCs. >>> >>> The first SoC in the sun20i series is D1, containing a single T-HEAD >>> C906 core. D1s is a low-pin-count variant of D1 with co-packaged DRAM. >>> >>> Most peripherals are shared across the entire chip family. In fact, the >>> ARMv7 T113 SoC is pin-compatible and almost entirely register-compatible >>> with the D1s. >>> >>> This means many existing device drivers can be reused. To facilitate >>> this reuse, name the symbol ARCH_SUNXI, since that is what the existing >>> drivers have as their dependency. >> >> Hey Samuel, >> I think this and patch 12/12 with the defconfig changes should be >> deferred until post LPC (which still leaves plenty of time for >> making the 6.1 merge window). We already have like 4 different >> approaches between the existing SOC_FOO symbols & two more when >> D1 stuff and the Renesas stuff is considered. > > On the other hand, I don't really think it's that hard to change things > after the fact? I.e. ARCH_SUNXI is pretty much set in stone anyway, > so there isn't very much that _could_ change without affecting most > driver subsystems in the kernel. > > So I don't think we'd actually need to wait with the Allwinner symbol. True, but it'd be the same release anyway most likely so I don't think that there'd really be any waiting involved. I /like/ the idea of using ARCH_FOO rather than SOC_FOO as it's far more consistent across the kernel - it's more a question of not doing one thing here and another with the Renesas stuff to me. > > > Heiko > >> Plan is to decide at LPC on one approach for what to do with >> Kconfig.socs & to me it seems like a good idea to do what's being >> done here - it's likely that further arm vendors will move and >> keeping the common symbols makes a lot of sense to me... >> >> Thanks, >> Conor. >> >>> >>> Signed-off-by: Samuel Holland <samuel@sholland.org> >>> --- >>> >>> arch/riscv/Kconfig.socs | 9 +++++++++ >>> 1 file changed, 9 insertions(+) >>> >>> diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs >>> index 69774bb362d6..1caacbfac1a5 100644 >>> --- a/arch/riscv/Kconfig.socs >>> +++ b/arch/riscv/Kconfig.socs >>> @@ -1,5 +1,14 @@ >>> menu "SoC selection" >>> >>> +config ARCH_SUNXI >>> + bool "Allwinner sun20i SoCs" >>> + select ERRATA_THEAD if MMU && !XIP_KERNEL >>> + select SIFIVE_PLIC >>> + select SUN4I_TIMER >>> + help >>> + This enables support for Allwinner sun20i platform hardware, >>> + including boards based on the D1 and D1s SoCs. >>> + >>> config SOC_MICROCHIP_POLARFIRE >>> bool "Microchip PolarFire SoCs" >>> select MCHP_CLK_MPFS >>> -- >>> 2.35.1 >>> >> >> _______________________________________________ >> linux-riscv mailing list >> linux-riscv@lists.infradead.org >> http://lists.infradead.org/mailman/listinfo/linux-riscv >> > > > >
diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs index 69774bb362d6..1caacbfac1a5 100644 --- a/arch/riscv/Kconfig.socs +++ b/arch/riscv/Kconfig.socs @@ -1,5 +1,14 @@ menu "SoC selection" +config ARCH_SUNXI + bool "Allwinner sun20i SoCs" + select ERRATA_THEAD if MMU && !XIP_KERNEL + select SIFIVE_PLIC + select SUN4I_TIMER + help + This enables support for Allwinner sun20i platform hardware, + including boards based on the D1 and D1s SoCs. + config SOC_MICROCHIP_POLARFIRE bool "Microchip PolarFire SoCs" select MCHP_CLK_MPFS
Allwinner manufactures the sunxi family of application processors. This includes the "sun8i" series of ARMv7 SoCs, the "sun50i" series of ARMv8 SoCs, and now the "sun20i" series of 64-bit RISC-V SoCs. The first SoC in the sun20i series is D1, containing a single T-HEAD C906 core. D1s is a low-pin-count variant of D1 with co-packaged DRAM. Most peripherals are shared across the entire chip family. In fact, the ARMv7 T113 SoC is pin-compatible and almost entirely register-compatible with the D1s. This means many existing device drivers can be reused. To facilitate this reuse, name the symbol ARCH_SUNXI, since that is what the existing drivers have as their dependency. Signed-off-by: Samuel Holland <samuel@sholland.org> --- arch/riscv/Kconfig.socs | 9 +++++++++ 1 file changed, 9 insertions(+)