diff options
| author | Scott Wood <scottwood@freescale.com> | 2011-03-24 16:43:54 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-05-19 01:14:27 -0500 |
| commit | 22d168ce60272ca112e86e58c5ebde82f20f9c83 (patch) | |
| tree | 9be17df8b4173c7e0fa380614ae5ba3bcbe594b9 /arch/powerpc/sysdev | |
| parent | c281739f5988af1f86ef06e92485aec25b8c8c4f (diff) | |
| download | lwn-22d168ce60272ca112e86e58c5ebde82f20f9c83.tar.gz lwn-22d168ce60272ca112e86e58c5ebde82f20f9c83.zip | |
powerpc/mpic: parse 4-cell intspec types other than zero
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index 824a94fc413b..0a3c1c20115c 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -6,6 +6,7 @@ * with various broken implementations of this HW. * * Copyright (C) 2004 Benjamin Herrenschmidt, IBM Corp. + * Copyright 2010-2011 Freescale Semiconductor, Inc. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive @@ -1023,6 +1024,7 @@ static int mpic_host_xlate(struct irq_host *h, struct device_node *ct, irq_hw_number_t *out_hwirq, unsigned int *out_flags) { + struct mpic *mpic = h->host_data; static unsigned char map_mpic_senses[4] = { IRQ_TYPE_EDGE_RISING, IRQ_TYPE_LEVEL_LOW, @@ -1031,7 +1033,38 @@ static int mpic_host_xlate(struct irq_host *h, struct device_node *ct, }; *out_hwirq = intspec[0]; - if (intsize > 1) { + if (intsize >= 4 && (mpic->flags & MPIC_FSL)) { + /* + * Freescale MPIC with extended intspec: + * First two cells are as usual. Third specifies + * an "interrupt type". Fourth is type-specific data. + * + * See Documentation/devicetree/bindings/powerpc/fsl/mpic.txt + */ + switch (intspec[2]) { + case 0: + case 1: /* no EISR/EIMR support for now, treat as shared IRQ */ + break; + case 2: + if (intspec[0] >= ARRAY_SIZE(mpic->ipi_vecs)) + return -EINVAL; + + *out_hwirq = mpic->ipi_vecs[intspec[0]]; + break; + case 3: + if (intspec[0] >= ARRAY_SIZE(mpic->timer_vecs)) + return -EINVAL; + + *out_hwirq = mpic->timer_vecs[intspec[0]]; + break; + default: + pr_debug("%s: unknown irq type %u\n", + __func__, intspec[2]); + return -EINVAL; + } + + *out_flags = map_mpic_senses[intspec[1] & 3]; + } else if (intsize > 1) { u32 mask = 0x3; /* Apple invented a new race of encoding on machines with @@ -1130,6 +1163,8 @@ struct mpic * __init mpic_alloc(struct device_node *node, /* Check for "big-endian" in device-tree */ if (node && of_get_property(node, "big-endian", NULL) != NULL) mpic->flags |= MPIC_BIG_ENDIAN; + if (node && of_device_is_compatible(node, "fsl,mpic")) + mpic->flags |= MPIC_FSL; /* Look for protected sources */ if (node) { |