[RFC PATCH v3 05/17] irqchip/sun4i: add support for suniv interrupt controller

Mesih Kilinc
2018-11-22T15:02:00Z

On 18/11/22 09:35, Maxime Ripard wrote:
> Hi Mesih,
>
Hi!
> On Wed, Nov 21, 2018 at 09:30:38PM +0300, Mesih Kilinc wrote:
> > The new F-series SoCs (suniv) from Allwinner use an stripped version of
> > the interrupt controller in A10/A13
> >
> > Add support for it in irq-sun4i driver.
> >
> > Signed-off-by: Mesih Kilinc <mesihkilinc@gmail.com>
> > ---
> > drivers/irqchip/irq-sun4i.c | 104 +++++++++++++++++++++++++++++++-------------
> > 1 file changed, 74 insertions(+), 30 deletions(-)
> >
> > diff --git a/drivers/irqchip/irq-sun4i.c b/drivers/irqchip/irq-sun4i.c
> > index e3e5b91..7ca4a4d 100644
> > --- a/drivers/irqchip/irq-sun4i.c
> > +++ b/drivers/irqchip/irq-sun4i.c
> > @@ -28,11 +28,21 @@
> > #define SUN4I_IRQ_NMI_CTRL_REG 0x0c
> > #define SUN4I_IRQ_PENDING_REG(x) (0x10 + 0x4 * x)
> > #define SUN4I_IRQ_FIQ_PENDING_REG(x) (0x20 + 0x4 * x)
> > -#define SUN4I_IRQ_ENABLE_REG(x) (0x40 + 0x4 * x)
> > -#define SUN4I_IRQ_MASK_REG(x) (0x50 + 0x4 * x)
> > +#define SUN4I_IRQ_ENABLE_REG(x) (irq_ic_data->enable_req_offset + 0x4 * x)
> > +#define SUN4I_IRQ_MASK_REG(x) (irq_ic_data->mask_req_offset + 0x4 * x)
>
> You shouldn't have all the values you use passed as argument, so
> irq_ic_data should be one of them here.
>
Could you elaborate it a little bit?
> > +#define SUN4I_IRQ_ENABLE_REG_OFFSET 0x40
> > +#define SUN4I_IRQ_MASK_REG_OFFSET 0x50
> > +#define SUNIV_IRQ_ENABLE_REG_OFFSET 0x20
> > +#define SUNIV_IRQ_MASK_REG_OFFSET 0x30
> > +
> > +struct sunxi_irq_chip_data{
> ^ a space here
>
> > + void __iomem *irq_base;
> > + struct irq_domain *irq_domain;
> > + u32 enable_req_offset;
> > + u32 mask_req_offset;
>
> s/req/reg/ ?
>
Oops sorry

...
> > +
> > +static int __init suniv_ic_of_init(struct device_node *node,
> > + struct device_node *parent)
> > +{
> > + irq_ic_data = kzalloc(sizeof(struct sunxi_irq_chip_data), GFP_KERNEL);
> > + if (!irq_ic_data) {
> > + pr_err("kzalloc failed!\n");
> > + return -ENOMEM;
> > + }
> > +
> > + irq_ic_data->enable_req_offset = SUNIV_IRQ_ENABLE_REG_OFFSET;
> > + irq_ic_data->mask_req_offset = SUNIV_IRQ_MASK_REG_OFFSET;
> > +
> > + return sun4i_of_init(node, parent);
> > +}
> > +
> > +IRQCHIP_DECLARE(allwinner_sunvi_ic, "allwinner,suniv-f1c100s-ic", suniv_ic_of_init);
>
> You can even split that addition to a new patch as well.

OK. I will do 3 patches. First one will add a struct that holds only
base and domain. Second one will add register offsets to that struct.
Third one will add f1c100s support. Is that ok?

Mesih