Hi Samuel,
On Wed 04 Nov 20, 22:14, Samuel Holland wrote:
> On 11/3/20 2:50 PM, Paul Kocialkowski wrote:
> > The V3s/V3 has a NMI IRQ controller, which is mainly used for the AXP209
> > interrupt. In great wisdom, Allwinner decided to invert the enable and
> > pending register offsets, compared to the A20.
> >
> > As a result, a specific compatible and register description is required
> > for the V3s. This was tested with an AXP209 on a V3 board.
> >
> > Acked-by: Maxime Ripard <mripard@xxxxxxxxxx>
> > Signed-off-by: Paul Kocialkowski <contact@xxxxxxxx>
> > ---
> > drivers/irqchip/irq-sunxi-nmi.c | 18 +++++++++++++++++-
> > 1 file changed, 17 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/irqchip/irq-sunxi-nmi.c b/drivers/irqchip/irq-sunxi-nmi.c
> > index a412b5d5d0fa..59e0e4612ef7 100644
> > --- a/drivers/irqchip/irq-sunxi-nmi.c
> > +++ b/drivers/irqchip/irq-sunxi-nmi.c
> > @@ -44,6 +44,10 @@
> > #define SUN7I_NMI_PENDING 0x04
> > #define SUN7I_NMI_ENABLE 0x08
> >
> > +#define SUN8I_V3S_NMI_CTRL 0x00
> > +#define SUN8I_V3S_NMI_ENABLE 0x04
> > +#define SUN8I_V3S_NMI_PENDING 0x08
> > +
> > #define SUN9I_NMI_CTRL 0x00
> > #define SUN9I_NMI_ENABLE 0x04
> > #define SUN9I_NMI_PENDING 0x08
>
> These two sets of definitions are the same. So it would make sense for
> V3S and sun9i to share a configuration, instead of creating a copy.
Oh but that's true! I initially though it was the same as sun7i, found that it
wasn't but didn't notice about sun9i.
So I think we can just use the sun9i compatible after all.
Thanks!
Paul
> > @@ -79,6 +83,12 @@ static const struct sunxi_sc_nmi_reg_offs sun7i_reg_offs __initconst = {
> > .enable = SUN7I_NMI_ENABLE,
> > };
> >
> > +static const struct sunxi_sc_nmi_reg_offs sun8i_v3s_reg_offs __initconst = {
> > + .ctrl = SUN8I_V3S_NMI_CTRL,
> > + .pend = SUN8I_V3S_NMI_PENDING,
> > + .enable = SUN8I_V3S_NMI_ENABLE,
> > +};
> > +
> > static const struct sunxi_sc_nmi_reg_offs sun9i_reg_offs __initconst = {
> > .ctrl = SUN9I_NMI_CTRL,
> > .pend = SUN9I_NMI_PENDING,
> > @@ -165,7 +175,6 @@ static int __init sunxi_sc_nmi_irq_init(struct device_node *node,
> > unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
> > int ret;
> >
> > -
> > domain = irq_domain_add_linear(node, 1, &irq_generic_chip_ops, NULL);
> > if (!domain) {
> > pr_err("Could not register interrupt domain.\n");
> > @@ -254,6 +263,13 @@ static int __init sun7i_sc_nmi_irq_init(struct device_node *node,
> > }
> > IRQCHIP_DECLARE(sun7i_sc_nmi, "allwinner,sun7i-a20-sc-nmi", sun7i_sc_nmi_irq_init);
> >
> > +static int __init sun8i_v3s_sc_nmi_irq_init(struct device_node *node,
> > + struct device_node *parent)
> > +{
> > + return sunxi_sc_nmi_irq_init(node, &sun8i_v3s_reg_offs);
> > +}
> > +IRQCHIP_DECLARE(sun8i_v3s_sc_nmi, "allwinner,sun8i-v3s-sc-nmi", sun8i_v3s_sc_nmi_irq_init);
> > +
> > static int __init sun9i_nmi_irq_init(struct device_node *node,
> > struct device_node *parent)
> > {
> >
>
--
Developer of free digital technology and hardware support.
Website: https://www.paulk.fr/
Coding blog: https://code.paulk.fr/
Git repositories: https://git.paulk.fr/ https://git.code.paulk.fr/
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