[PATCH v4 1/7] ARM: davinci, intc: Add irq domain support
From: Heiko Schocher <hidden>
Date: 2012-05-22 13:55:14
Also in:
linux-arm-kernel
Subsystem:
arm port, the rest, ti davinci machine support · Maintainers:
Russell King, Linus Torvalds, Bartosz Golaszewski
Possibly related (same subject, not in this thread)
- 2012-05-22 · Re: [PATCH v4 1/7] ARM: davinci, intc: Add irq domain support · Sergei Shtylyov <hidden>
Signed-off-by: Heiko Schocher <redacted>
Cc: davinci-linux-open-source-VycZQUHpC/PFrsHnngEfi1aTQe2KTcn/@public.gmane.org
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org
Cc: Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>
Cc: Sekhar Nori <redacted>
Cc: Wolfgang Denk <redacted>
Cc: Sergei Shtylyov <redacted>
---
- changes for v2:
- add comment from Grant Likely:
- migrate the whole interrupt controller to natively use an
irq_domain. Rebased complete patchserie to:
git://git.secretlab.ca/git/linux-2.6.git irqdomain/next
commit 3a806bfcde2cc3e4853f2807b2e3c94e7ccaf450
Author: Grant Likely [off-list ref]
Date: Fri Jan 27 06:44:34 2012 -0700
irq_domain: mostly eliminate slow-path revmap lookups
- changes for v3:
- add comments from Sergei Shtylyov:
- rename compatible" prop to "ti,cp_intc"
- cp_intc_init() is now also for the of case
the name of the init function (it calls the
"new" __cp_intc_init() function, which was
the "old" cp_intc_init()). Throught this
rework the changes for OF is better visible.
As the OF case uses the irq_domain rework from
Grant Likely, maybe the none OF case can use
this also, but this should be tested on a hw ...
- rebased to:
git://git.secretlab.ca/git/linux-2.6.git irqdomain/next
commit 280ad7fda5f95211857fda38960f2b6fdf6edd3e
Author: Grant Likely [off-list ref]
Date: Fri Feb 24 14:58:54 2012 -0700
mfd: twl-core: Add IRQ_DOMAIN dependency
- changes for v4
- split patch in 2 patches, one for irq_domain adaption
one for DT enhancement, as Nori Sekhar suggested
- add comment from Grant Likely for the DT part:
remove if/else clause, not needed.
Make use of DT runtime configurable
arch/arm/mach-davinci/cp_intc.c | 54 ++++++++++++++++++++++++++++++++------
1 files changed, 45 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-davinci/cp_intc.c b/arch/arm/mach-davinci/cp_intc.c
index f83152d..bb52807 100644
--- a/arch/arm/mach-davinci/cp_intc.c
+++ b/arch/arm/mach-davinci/cp_intc.c@@ -9,8 +9,10 @@ * kind, whether express or implied. */ +#include <linux/export.h> #include <linux/init.h> #include <linux/irq.h> +#include <linux/irqdomain.h> #include <linux/io.h> #include <mach/common.h>
@@ -99,18 +101,37 @@ static struct irq_chip cp_intc_irq_chip = { .irq_set_wake = cp_intc_set_wake, }; -void __init cp_intc_init(void) +static struct irq_domain *cp_intc_domain; + +static int cp_intc_host_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) { - unsigned long num_irq = davinci_soc_info.intc_irq_num; + pr_debug("cp_intc_host_map(%d, 0x%lx)\n", virq, hw); + + irq_set_chip(virq, &cp_intc_irq_chip); + set_irq_flags(virq, IRQF_VALID | IRQF_PROBE); + irq_set_handler(virq, handle_edge_irq); + return 0; +} + +static const struct irq_domain_ops cp_intc_host_ops = { + .map = cp_intc_host_map, + .xlate = irq_domain_xlate_onetwocell, +}; + +int __init __cp_intc_init(struct device_node *node) +{ + u32 num_irq = davinci_soc_info.intc_irq_num; u8 *irq_prio = davinci_soc_info.intc_irq_prios; u32 *host_map = davinci_soc_info.intc_host_map; unsigned num_reg = BITS_TO_LONGS(num_irq); - int i; + int i, irq_base; davinci_intc_type = DAVINCI_INTC_TYPE_CP_INTC; davinci_intc_base = ioremap(davinci_soc_info.intc_base, SZ_8K); + if (WARN_ON(!davinci_intc_base)) - return; + return -EINVAL; cp_intc_write(0, CP_INTC_GLOBAL_ENABLE);
@@ -165,13 +186,28 @@ void __init cp_intc_init(void) for (i = 0; host_map[i] != -1; i++) cp_intc_write(host_map[i], CP_INTC_HOST_MAP(i)); - /* Set up genirq dispatching for cp_intc */ - for (i = 0; i < num_irq; i++) { - irq_set_chip(i, &cp_intc_irq_chip); - set_irq_flags(i, IRQF_VALID | IRQF_PROBE); - irq_set_handler(i, handle_edge_irq); + irq_base = irq_alloc_descs(-1, 0, num_irq, 0); + if (irq_base < 0) { + pr_warn("Couldn't allocate IRQ numbers\n"); + irq_base = 0; + } + + /* create a legacy host */ + cp_intc_domain = irq_domain_add_legacy(node, num_irq, + irq_base, 0, &cp_intc_host_ops, NULL); + + if (cp_intc_domain == NULL) { + pr_err("CP INTC: failed to allocate irq host!\n"); + return -EINVAL; } /* Enable global interrupt */ cp_intc_write(1, CP_INTC_GLOBAL_ENABLE); + + return 0; +} + +void __init cp_intc_init(void) +{ + __cp_intc_init(NULL); }
--
1.7.7.6