| Message ID | 20211021174223.43310-2-kernel@esmil.dk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Basic StarFive JH7100 RISC-V SoC support | expand |
On Thu, Oct 21, 2021 at 8:42 PM Emil Renner Berthing <kernel@esmil.dk> wrote: > > Add StarFive Kconfig option to select SoC specific and common drivers > required for these SoCs. ... > +config SOC_STARFIVE > + bool "StarFive SoCs" > + select PINCTRL > + select RESET_CONTROLLER > + select SIFIVE_PLIC If this is well understood and platform related the above two are too generic. Why have you selected them? > + help > + This enables support for StarFive SoC platform hardware. Not too much to read here. What is the point of this help? I would elaborate what kind of platform it may support, what kind of drivers it selects due to necessity of the accomplishing the boot process, etc.
On Fri, 22 Oct 2021 at 10:51, Andy Shevchenko <andy.shevchenko@gmail.com> wrote: > On Thu, Oct 21, 2021 at 8:42 PM Emil Renner Berthing <kernel@esmil.dk> wrote: > > > > Add StarFive Kconfig option to select SoC specific and common drivers > > required for these SoCs. > > ... > > > +config SOC_STARFIVE > > + bool "StarFive SoCs" > > + select PINCTRL > > + select RESET_CONTROLLER > > > + select SIFIVE_PLIC > > If this is well understood and platform related the above two are too > generic. Why have you selected them? From your last comments the criterion seemed to be to only add it here if it would otherwise fail to boot. Well it does fail to boot without the reset and pinctrl drivers. The clock driver too, but RISCV already selects COMMON_CLK. Once PINCTRL and RESET_CONTROLLER is selected the specific drivers defaults to SOC_STARFIVE. Alternatively we'd select the drivers too, but I can't promise that future StarFive chips will need the same JH7100 clock and reset drivers. Doing it this way means that selecting SOC_STARFIVE by default gives you a kernel that will boot on all StarFive SoCs, but you can still customise it further to your particular chip. It seems like SOC_SIFIVE is doing the same. > > + help > > + This enables support for StarFive SoC platform hardware. > > Not too much to read here. What is the point of this help? > I would elaborate what kind of platform it may support, what kind of > drivers it selects due to necessity of the accomplishing the boot > process, etc. This is exactly as the other descriptions in this file. I don't know why SOC_STARFIVE should be special. /Emil
On Fri, Oct 22, 2021 at 12:40 PM Emil Renner Berthing <kernel@esmil.dk> wrote: > On Fri, 22 Oct 2021 at 10:51, Andy Shevchenko <andy.shevchenko@gmail.com> wrote: > > On Thu, Oct 21, 2021 at 8:42 PM Emil Renner Berthing <kernel@esmil.dk> wrote: ... > > > +config SOC_STARFIVE > > > + bool "StarFive SoCs" > > > + select PINCTRL > > > + select RESET_CONTROLLER > > > > > + select SIFIVE_PLIC > > > > If this is well understood and platform related the above two are too > > generic. Why have you selected them? > > From your last comments the criterion seemed to be to only add it here > if it would otherwise fail to boot. Well it does fail to boot without > the reset and pinctrl drivers. The clock driver too, but RISCV already > selects COMMON_CLK. Once PINCTRL and RESET_CONTROLLER is selected the > specific drivers defaults to SOC_STARFIVE. > > Alternatively we'd select the drivers too, but I can't promise that > future StarFive chips will need the same JH7100 clock and reset > drivers. Doing it this way means that selecting SOC_STARFIVE by > default gives you a kernel that will boot on all StarFive SoCs, but > you can still customise it further to your particular chip. It seems > like SOC_SIFIVE is doing the same. Okay, please add this justification to the commit message in the next version. ... > > > + help > > > + This enables support for StarFive SoC platform hardware. > > > > Not too much to read here. What is the point of this help? > > I would elaborate what kind of platform it may support, what kind of > > drivers it selects due to necessity of the accomplishing the boot > > process, etc. > > This is exactly as the other descriptions in this file. I don't know > why SOC_STARFIVE should be special. OK.
diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs index 30676ebb16eb..6ec44a22278a 100644 --- a/arch/riscv/Kconfig.socs +++ b/arch/riscv/Kconfig.socs @@ -19,6 +19,14 @@ config SOC_SIFIVE help This enables support for SiFive SoC platform hardware. +config SOC_STARFIVE + bool "StarFive SoCs" + select PINCTRL + select RESET_CONTROLLER + select SIFIVE_PLIC + help + This enables support for StarFive SoC platform hardware. + config SOC_VIRT bool "QEMU Virt Machine" select CLINT_TIMER if RISCV_M_MODE
Add StarFive Kconfig option to select SoC specific and common drivers required for these SoCs. Signed-off-by: Emil Renner Berthing <kernel@esmil.dk> --- arch/riscv/Kconfig.socs | 8 ++++++++ 1 file changed, 8 insertions(+)