diff options
| author |   Mark A. Greer <mgreer@mvista.com> | 2006-06-20 14:15:36 -0700 |
|---|---|---|
| committer |   Paul Mackerras <paulus@samba.org> | 2006-06-21 15:01:32 +1000 |
| commit | 868ea0c9256b658b14603e1ad7361b81b92ccacd (patch) | |
| tree | 6d080ba156f8098277329f26f1d4e3a73cae2093 /arch/powerpc/sysdev/mpic.c | |
| parent | [POWERPC] pseries: Print PCI slot location code on failure (diff) | |
| download | linux-dev-868ea0c9256b658b14603e1ad7361b81b92ccacd.tar.xz linux-dev-868ea0c9256b658b14603e1ad7361b81b92ccacd.zip | |
[POWERPC] mpic: add support for serial mode interrupts
On Tue, Jun 20, 2006 at 02:01:26PM +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2006-06-19 at 13:08 -0700, Mark A. Greer wrote:
> > MPC10x-style interrupt controllers have a serial mode that allows
> > several interrupts to be clocked in through one INT signal.
> >
> > This patch adds the software support for that mode.
>
> You hard code the clock ratio... why not add a separate call to be
> called after mpic_init,
> something like mpic_set_serial_int(int mpic, int enable, int
> clock_ratio) ?
How's this?
--
MPC10x-style interrupt controllers have a serial mode that allows
several interrupts to be clocked in through one INT signal.
This patch adds the software support for that mode.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
--
arch/powerpc/sysdev/mpic.c | 20 ++++++++++++++++++++
include/asm-powerpc/mpic.h | 10 ++++++++++
2 files changed, 30 insertions(+)
--
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/sysdev/mpic.c')
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index 7dcdfcb3c984..bffe50d02c99 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -829,7 +829,27 @@ void __init mpic_init(struct mpic *mpic) mpic_cpu_write(MPIC_CPU_CURRENT_TASK_PRI, 0); } +void __init mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio) +{ + u32 v; + + v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1); + v &= ~MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK; + v |= MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(clock_ratio); + mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v); +} +void __init mpic_set_serial_int(struct mpic *mpic, int enable) +{ + u32 v; + + v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1); + if (enable) + v |= MPIC_GREG_GLOBAL_CONF_1_SIE; + else + v &= ~MPIC_GREG_GLOBAL_CONF_1_SIE; + mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v); +} void mpic_irq_set_priority(unsigned int irq, unsigned int pri) { |