| Message ID | 20220130135634.1213301-3-guoren@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add thead,c900-plic support | expand |
On 1/30/22 7:56 AM, guoren@kernel.org wrote: > From: Guo Ren <guoren@linux.alibaba.com> > > The thead,c900-plic has been used in opensbi to distinguish > PLIC [1]. Although PLICs have the same behaviors in Linux, > they are different hardware with some custom initializing in > firmware(opensbi). > > Qute opensbi patch commit-msg by Samuel: > > The T-HEAD PLIC implementation requires setting a delegation bit > to allow access from S-mode. Now that the T-HEAD PLIC has its own > compatible string, set this bit automatically from the PLIC driver, > instead of reaching into the PLIC's MMIO space from another driver. > > [1]: https://github.com/riscv-software-src/opensbi/commit/78c2b19218bd62653b9fb31623a42ced45f38ea6 > > Signed-off-by: Guo Ren <guoren@linux.alibaba.com> > Cc: Anup Patel <anup@brainfault.org> > Cc: Marc Zyngier <maz@kernel.org> > Cc: Palmer Dabbelt <palmer@dabbelt.com> > Cc: Samuel Holland <samuel@sholland.org> > Cc: Thomas Gleixner <tglx@linutronix.de> > --- > drivers/irqchip/irq-sifive-plic.c | 1 + > 1 file changed, 1 insertion(+) Tested-by: Samuel Holland <samuel@sholland.org>
Hi Marc, On Wed, Feb 2, 2022 at 12:42 PM Samuel Holland <samuel@sholland.org> wrote: > > On 1/30/22 7:56 AM, guoren@kernel.org wrote: > > From: Guo Ren <guoren@linux.alibaba.com> > > > > The thead,c900-plic has been used in opensbi to distinguish > > PLIC [1]. Although PLICs have the same behaviors in Linux, > > they are different hardware with some custom initializing in > > firmware(opensbi). > > > > Qute opensbi patch commit-msg by Samuel: > > > > The T-HEAD PLIC implementation requires setting a delegation bit > > to allow access from S-mode. Now that the T-HEAD PLIC has its own > > compatible string, set this bit automatically from the PLIC driver, > > instead of reaching into the PLIC's MMIO space from another driver. > > > > [1]: https://github.com/riscv-software-src/opensbi/commit/78c2b19218bd62653b9fb31623a42ced45f38ea6 > > > > Signed-off-by: Guo Ren <guoren@linux.alibaba.com> > > Cc: Anup Patel <anup@brainfault.org> > > Cc: Marc Zyngier <maz@kernel.org> > > Cc: Palmer Dabbelt <palmer@dabbelt.com> > > Cc: Samuel Holland <samuel@sholland.org> > > Cc: Thomas Gleixner <tglx@linutronix.de> > > --- > > drivers/irqchip/irq-sifive-plic.c | 1 + > > 1 file changed, 1 insertion(+) > > Tested-by: Samuel Holland <samuel@sholland.org> ping... gently. Any problem with the above patch? -- Best Regards Guo Ren ML: https://lore.kernel.org/linux-csky/
diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c index 259065d271ef..09cc98266d30 100644 --- a/drivers/irqchip/irq-sifive-plic.c +++ b/drivers/irqchip/irq-sifive-plic.c @@ -398,3 +398,4 @@ static int __init plic_init(struct device_node *node, IRQCHIP_DECLARE(sifive_plic, "sifive,plic-1.0.0", plic_init); IRQCHIP_DECLARE(riscv_plic0, "riscv,plic0", plic_init); /* for legacy systems */ +IRQCHIP_DECLARE(thead_c900_plic, "thead,c900-plic", plic_init); /* for firmware driver */