[PATCH] Freescale mpc8315 interrupt chip

Next try to submit two patches for Freescale mpc8315.

first one
-----------------------------------------------------------------------=
------------
powerpc/ipic: Configure "EDGE" capabilities for IRQ0 too (like IRQ1-7)
Signed-off-by: Jurgen Schindele <redacted>

The external IRQ0 has the same capabilities as the other IRQ1-7 and is
handeled by the same register IPIC_SEPNR. When this register for "ack"
is not setup in "ipic_info" you can not configure this IRQ for
IRQ_TYPE_EDGE_FALLING. This is probably due to the non-continued number=

of IRQ0 in the Freescale hwirq number mapping.

--- linux-4.11/arch/powerpc/sysdev/ipic.c.orig  2017-05-11 13:40:43.874=

801534=20
+0200

+++ linux-4.11/arch/powerpc/sysdev/ipic.c       2017-05-11 14:05:06.336=

610289=20
+0200

@@ -315,6 +315,7 @@ static struct ipic_info ipic_info[] =3D {
                .prio_mask =3D 7,
        },
        [48] =3D {
+               .ack    =3D IPIC_SEPNR,
                .mask   =3D IPIC_SEMSR,
                .prio   =3D IPIC_SMPRR_A,
                .force  =3D IPIC_SEFCR,

second one
-----------------------------------------------------------------------=
------------------
powerpc/ipic: Precise ERR printk when "ipic_set_irq_type" fails
Signed-off-by: Jurgen Schindele <redacted>

When you setup an interrupt of a certain type on this interrupt-control=
er
which is not supported on this hardware you will get an error log but y=
ou
dont know which interrupt was the cause.
With this patch you are able to localize the source of failure.

--- linux-4.11/arch/powerpc/sysdev/ipic.c.orig  2017-05-11 14:08:07.098=

824986=20
+0200

+++ linux-4.11/arch/powerpc/sysdev/ipic.c       2017-05-11 14:10:51.010=

934755=20
+0200

@@ -611,14 +611,14 @@ static int ipic_set_irq_type(struct irq_
        /* ipic supports only low assertion and high-to-low change sens=

es
         */
        if (!(flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING))=
) {
-               printk(KERN_ERR "ipic: sense type 0x%x not supported\n"=
,
-                       flow_type);
+               printk(KERN_ERR "ipic: sense type 0x%x not supported on=
 "
+                       "interrupt %d\n", flow_type, src);
                return -EINVAL;
        }
        /* ipic supports only edge mode on external interrupts */
        if ((flow_type & IRQ_TYPE_EDGE_FALLING) && !ipic_info[src].ack)=
 {
                printk(KERN_ERR "ipic: edge sense not supported on inte=
rnal "
-                               "interrupts\n");
+                               "interrupt %d\n", src);
                return -EINVAL;

        }

I hope i respected all patch requirements ;-)
Am Donnerstag, 4. Mai 2017, 15:55:28 schrieb Scott Wood:

On Thu, 2017-05-04 at 17:06 +0200, Juergen Schindele wrote:

quoted

Am Dienstag, 2. Mai 2017, 22:29:34 schrieb Scott Wood:

quoted

On Tue, 2017-05-02 at 14:43 +0200, Juergen Schindele wrote:

quoted

Dear Scott,
sorry for the delay but i am not very familiar with the formati=

ng.

quoted

quoted

quoted

I passed the patch trough checkpatch.pl and there was no more e=

rror.

quoted

quoted

quoted

pease find patch in attached file.
Thanks

=20
Documentation/process/submitting-patches.rst explains the way to =

format

quoted

quoted

and
submit kernel patches.
=20
Also, why the unrelated change to a print statement in
ipic_set_irq_type()?
=20
-Scott

=20
The second diff is not completely unrelated because when i was
investigating=20
the problem i saw only a message "edge sense not supported" but you=

 dont

quoted

know on which interrupt he is complaining about. So i added this to=

 find

quoted

out=20
who the suspect is.

=20
That's fine but it's still fixing a different problem than "irq0 setu=

p" and

should be a separate patch.
=20

quoted

Corrected patch

=20
Again, please read Documentation/process/submitting-patches.rst.  Pat=

ches

should be inline, not attached.  The subject line should be something=

 like

"powerpc/ipic: Configure "EDGE" capabilities for IRQ0 (like IRQ1-7)" =

and

there should be more description in the body of the changelog.
=20
-Scott

Thanks for your hints
--=20
i. A.
J=FCrgen Schindele
Softwareentwicklung

PSI Nentec GmbH
Greschbachstra=DFe 12
76229 Karlsruhe
Deutschland
Telefon: +49 721 94249-51
Telefax: +49 721 94249-10
schindele@nentec.de
www.nentec.de

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