From b5bf5b6786ccfc9e0c8801291f463d92c8e0b423 Mon Sep 17 00:00:00 2001 From: Jeff Mahoney Date: Wed, 6 Jul 2005 15:26:27 -0400 Subject: [PATCH] [PATCH] openfirmware: add sysfs nodes for open firmware devices This adds sysfs nodes that the hotplug userspace can use to load the appropriate modules. In order for hotplug to work with macio devices, patches to module-init-tools and hotplug must be applied. Those patches are available at: ftp://ftp.suse.com/pub/people/jeffm/linux/macio-hotplug/ Changes: The previous versions were built on 2.6.12. 2.6.13-rcX introduced a device_attribute parameter to the show functions. Since that parameter was treated as the output buffer, memory corruption would result, causing Oopsen very quickly. Signed-off-by: Jeff Mahoney Signed-off-by: Linus Torvalds --- drivers/macintosh/Makefile | 2 +- drivers/macintosh/macio_asic.c | 3 ++ drivers/macintosh/macio_sysfs.c | 50 +++++++++++++++++++++++++++++++++ 3 files changed, 54 insertions(+), 1 deletion(-) create mode 100644 drivers/macintosh/macio_sysfs.c diff --git a/drivers/macintosh/Makefile b/drivers/macintosh/Makefile index f5ae171dbfef..236291bd48a4 100644 --- a/drivers/macintosh/Makefile +++ b/drivers/macintosh/Makefile @@ -4,7 +4,7 @@ # Each configuration option enables a list of files. -obj-$(CONFIG_PPC_PMAC) += macio_asic.o +obj-$(CONFIG_PPC_PMAC) += macio_asic.o macio_sysfs.o obj-$(CONFIG_PMAC_MEDIABAY) += mediabay.o obj-$(CONFIG_MAC_EMUMOUSEBTN) += mac_hid.o diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c index 37b18ee08a2d..7fa369cfcceb 100644 --- a/drivers/macintosh/macio_asic.c +++ b/drivers/macintosh/macio_asic.c @@ -126,11 +126,14 @@ static int macio_device_resume(struct device * dev) return 0; } +extern struct device_attribute macio_dev_attrs[]; + struct bus_type macio_bus_type = { .name = "macio", .match = macio_bus_match, .suspend = macio_device_suspend, .resume = macio_device_resume, + .dev_attrs = macio_dev_attrs, }; static int __init macio_bus_driver_init(void) diff --git a/drivers/macintosh/macio_sysfs.c b/drivers/macintosh/macio_sysfs.c new file mode 100644 index 000000000000..97d22bb4516a --- /dev/null +++ b/drivers/macintosh/macio_sysfs.c @@ -0,0 +1,50 @@ +#include +#include +#include +#include + + +#define macio_config_of_attr(field, format_string) \ +static ssize_t \ +field##_show (struct device *dev, struct device_attribute *attr, \ + char *buf) \ +{ \ + struct macio_dev *mdev = to_macio_device (dev); \ + return sprintf (buf, format_string, mdev->ofdev.node->field); \ +} + +static ssize_t +compatible_show (struct device *dev, struct device_attribute *attr, char *buf) +{ + struct of_device *of; + char *compat; + int cplen; + int length = 0; + + of = &to_macio_device (dev)->ofdev; + compat = (char *) get_property(of->node, "compatible", &cplen); + if (!compat) { + *buf = '\0'; + return 0; + } + while (cplen > 0) { + int l; + length += sprintf (buf, "%s\n", compat); + buf += length; + l = strlen (compat) + 1; + compat += l; + cplen -= l; + } + + return length; +} + +macio_config_of_attr (name, "%s\n"); +macio_config_of_attr (type, "%s\n"); + +struct device_attribute macio_dev_attrs[] = { + __ATTR_RO(name), + __ATTR_RO(type), + __ATTR_RO(compatible), + __ATTR_NULL +};