linux-kernel - Re: [PATCH V2 14/21] irqchip/riscv-intc: Add ACPI support

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Date:   Fri, 24 Feb 2023 17:59:21 +0530
From:   Sunil V L <sunilvl@...tanamicro.com>
To:     Andrew Jones <ajones@...tanamicro.com>
Cc:     Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        linux-riscv@...ts.infradead.org, linux-acpi@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Conor Dooley <conor.dooley@...rochip.com>,
        Anup Patel <apatel@...tanamicro.com>,
        Atish Patra <atishp@...osinc.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH V2 14/21] irqchip/riscv-intc: Add ACPI support

On Mon, Feb 20, 2023 at 08:37:14PM +0100, Andrew Jones wrote:
> On Thu, Feb 16, 2023 at 11:50:36PM +0530, Sunil V L wrote:
> > Add support for initializing the RISC-V INTC driver on ACPI
> > platforms.
> > 
> > Signed-off-by: Sunil V L <sunilvl@...tanamicro.com>
> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> > ---
> >  drivers/irqchip/irq-riscv-intc.c | 78 +++++++++++++++++++++++++++-----
> >  1 file changed, 66 insertions(+), 12 deletions(-)
> > 
> > diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
> > index f229e3e66387..97a8db0fbc6c 100644
> > --- a/drivers/irqchip/irq-riscv-intc.c
> > +++ b/drivers/irqchip/irq-riscv-intc.c
> > @@ -6,6 +6,7 @@
> >   */
> >  
> >  #define pr_fmt(fmt) "riscv-intc: " fmt
> > +#include <linux/acpi.h>
> >  #include <linux/atomic.h>
> >  #include <linux/bits.h>
> >  #include <linux/cpu.h>
> > @@ -112,6 +113,30 @@ static struct fwnode_handle *riscv_intc_hwnode(void)
> >  	return intc_domain->fwnode;
> >  }
> >  
> > +static int __init riscv_intc_init_common(struct fwnode_handle *fn)
> > +{
> > +	int rc;
> > +
> > +	intc_domain = irq_domain_create_linear(fn, BITS_PER_LONG,
> > +					       &riscv_intc_domain_ops, NULL);
> > +	if (!intc_domain) {
> > +		pr_err("unable to add IRQ domain\n");
> > +		return -ENXIO;
> > +	}
> > +
> > +	rc = set_handle_irq(&riscv_intc_irq);
> > +	if (rc) {
> > +		pr_err("failed to set irq handler\n");
> > +		return rc;
> > +	}
> > +
> > +	riscv_set_intc_hwnode_fn(riscv_intc_hwnode);
> > +
> > +	pr_info("%d local interrupts mapped\n", BITS_PER_LONG);
> > +
> > +	return 0;
> > +}
> > +
> >  static int __init riscv_intc_init(struct device_node *node,
> >  				  struct device_node *parent)
> >  {
> > @@ -133,24 +158,53 @@ static int __init riscv_intc_init(struct device_node *node,
> >  	if (riscv_hartid_to_cpuid(hartid) != smp_processor_id())
> >  		return 0;
> >  
> > -	intc_domain = irq_domain_add_linear(node, BITS_PER_LONG,
> > -					    &riscv_intc_domain_ops, NULL);
> > -	if (!intc_domain) {
> > -		pr_err("unable to add IRQ domain\n");
> > -		return -ENXIO;
> > -	}
> > -
> > -	rc = set_handle_irq(&riscv_intc_irq);
> > +	rc = riscv_intc_init_common(of_node_to_fwnode(node));
> >  	if (rc) {
> > -		pr_err("failed to set irq handler\n");
> > +		pr_err("failed to initialize INTC\n");
> >  		return rc;
> >  	}
> >  
> > -	riscv_set_intc_hwnode_fn(riscv_intc_hwnode);
> > +	return 0;
> > +}
> >  
> > -	pr_info("%d local interrupts mapped\n", BITS_PER_LONG);
> > +IRQCHIP_DECLARE(riscv, "riscv,cpu-intc", riscv_intc_init);
> > +
> > +#ifdef CONFIG_ACPI
> > +
> > +static int __init
> > +riscv_intc_acpi_init(union acpi_subtable_headers *header,
> > +		     const unsigned long end)
> 
> Please keep the function and its return type on the same line. We can go
> to 100 chars.
> 
Yes, missed updating this instance. Thanks!

Thanks,
Sunil