From 868ea0c9256b658b14603e1ad7361b81b92ccacd Mon Sep 17 00:00:00 2001 From: "Mark A. Greer" Date: Tue, 20 Jun 2006 14:15:36 -0700 Subject: [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 -- arch/powerpc/sysdev/mpic.c | 20 ++++++++++++++++++++ include/asm-powerpc/mpic.h | 10 ++++++++++ 2 files changed, 30 insertions(+) -- Signed-off-by: Paul Mackerras --- arch/powerpc/sysdev/mpic.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'arch/powerpc/sysdev/mpic.c') 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) { -- cgit v1.2.3-59-g8ed1b