From patchwork Wed Apr 7 04:10:13 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [RFC, 3/7] devicetree: add helper for determining IRQ properties in the device tree Date: Tue, 06 Apr 2010 18:10:13 -0000 From: Grant Likely X-Patchwork-Id: 49564 Message-Id: <20100407041013.20274.26545.stgit@angua> To: qemu-devel@nongnu.org, devicetree-discuss@lists.ozlabs.org, jeremy.kerr@canonical.com Cc: This patch adds the qbus_fdt_irq_to_number() helper to determine the interrupt number and phandle needed for adding the interrupts property to a device node in the device tree. Signed-off-by: Grant Likely --- hw/qdev.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ hw/qdev.h | 1 + 2 files changed, 49 insertions(+), 0 deletions(-) diff --git a/hw/qdev.c b/hw/qdev.c index b177c3d..ed68a70 100644 --- a/hw/qdev.c +++ b/hw/qdev.c @@ -751,6 +751,54 @@ void do_device_del(Monitor *mon, const QDict *qdict) #ifdef CONFIG_FDT #include +/* Iterate over entire device list looking for the interrupt parent */ +static int __qbus_fdt_irq_to_number(qemu_irq irq, BusState *bus, + uint32_t *phandle); +static int __qbus_fdt_irq_to_number_dev(qemu_irq irq, DeviceState *dev, + uint32_t *phandle) +{ + BusState *child; + int rc, i; + + for (i = 0; i < dev->num_gpio_in; i++) { + if (irq == qdev_get_gpio_in(dev, i)) { + if (phandle) + *phandle = (uint64_t)dev; + return i; + } + } + + QLIST_FOREACH(child, &dev->child_bus, sibling) { + rc = __qbus_fdt_irq_to_number(irq, child, phandle); + if (rc >= 0) + return rc; + } + + return -1; +} + +static int __qbus_fdt_irq_to_number(qemu_irq irq, BusState *bus, + uint32_t *phandle) +{ + struct DeviceState *dev; + int rc; + + QLIST_FOREACH(dev, &bus->children, sibling) { + rc = __qbus_fdt_irq_to_number_dev(irq, dev, phandle); + if (rc >= 0) + return rc; + } + + return -1; +} + +int qbus_fdt_irq_to_number(qemu_irq irq, uint32_t *phandle) +{ + return __qbus_fdt_irq_to_number(irq, main_system_bus, phandle); +} + + + static int qbus_fdt_add_bus(void *fdt, BusState *bus, int dev_offset); static int qdev_fdt_add_device(void *fdt, DeviceState *dev, int bus_offset) { diff --git a/hw/qdev.h b/hw/qdev.h index d549d43..84544c7 100644 --- a/hw/qdev.h +++ b/hw/qdev.h @@ -277,6 +277,7 @@ void qdev_prop_set_compat(DeviceState *dev); extern struct BusInfo system_bus_info; #ifdef CONFIG_FDT +int qbus_fdt_irq_to_number(qemu_irq irq, uint32_t *phandle); int qdev_fdt_populate(void *fdt); #endif