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authorMark A. Greer <mgreer@mvista.com>2006-06-20 17:15:36 -0400
committerPaul Mackerras <paulus@samba.org>2006-06-21 01:01:32 -0400
commit868ea0c9256b658b14603e1ad7361b81b92ccacd (patch)
tree6d080ba156f8098277329f26f1d4e3a73cae2093 /arch/powerpc/sysdev/mpic.c
parent0aa8d15b01881ccaab5f2fb31eef33ced97ccb5f (diff)
[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.c20
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)
829 mpic_cpu_write(MPIC_CPU_CURRENT_TASK_PRI, 0); 829 mpic_cpu_write(MPIC_CPU_CURRENT_TASK_PRI, 0);
830} 830}
831 831
832void __init mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio)
833{
834 u32 v;
835
836 v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
837 v &= ~MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK;
838 v |= MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(clock_ratio);
839 mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
840}
832 841
842void __init mpic_set_serial_int(struct mpic *mpic, int enable)
843{
844 u32 v;
845
846 v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
847 if (enable)
848 v |= MPIC_GREG_GLOBAL_CONF_1_SIE;
849 else
850 v &= ~MPIC_GREG_GLOBAL_CONF_1_SIE;
851 mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
852}
833 853
834void mpic_irq_set_priority(unsigned int irq, unsigned int pri) 854void mpic_irq_set_priority(unsigned int irq, unsigned int pri)
835{ 855{