Messages in this thread Patch in this message | | | Subject | patch platform_bus-learns-about-modalias.patch added to gregkh-2.6 tree | From | <> | Date | Mon, 01 May 2006 22:34:08 -0700 |
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This is a note to let you know that I've just added the patch titled
Subject: platform_bus learns about modalias
to my gregkh-2.6 tree. Its filename is
platform_bus-learns-about-modalias.patch
This tree can be found at http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
From david-b@pacbell.net Mon May 1 14:05:05 2006 From: David Brownell <david-b@pacbell.net> To: Greg KH <greg@kroah.com> Subject: platform_bus learns about modalias Date: Mon, 1 May 2006 11:16:01 -0700 Cc: Russell King <rmk@arm.linux.org.uk>, Linux Kernel list <linux-kernel@vger.kernel.org> Message-Id: <200605011116.02250.david-b@pacbell.net>
This patch adds modalias support to platform devices, for simpler hotplug/coldplug driven driver setup.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/base/platform.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)
--- gregkh-2.6.orig/drivers/base/platform.c +++ gregkh-2.6/drivers/base/platform.c @@ -452,6 +452,40 @@ void platform_driver_unregister(struct p EXPORT_SYMBOL_GPL(platform_driver_unregister); +/* modalias support enables more hands-off userspace setup: + * (a) environment variable lets new-style hotplug events work once system is + * fully running: "modprobe $MODALIAS" + * (b) sysfs attribute lets new-style coldplug recover from hotplug events + * mishandled before system is fully running: "modprobe $(cat modalias)" + */ +static ssize_t +modalias_show(struct device *dev, struct device_attribute *a, char *buf) +{ + struct platform_device *pdev = to_platform_device(dev); + unsigned len = strlen(pdev->name); + + len = min(len, (size_t)(PAGE_SIZE - 1)); + memcpy(buf, pdev->name, len); + buf[PAGE_SIZE - 1] = 0; + return len; +} + +static struct device_attribute platform_dev_attrs[] = { + __ATTR_RO(modalias), + __ATTR_NULL, +}; + +static int platform_uevent(struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size) +{ + struct platform_device *pdev = to_platform_device(dev); + + envp[0] = buffer; + snprintf(buffer, buffer_size, "MODALIAS=%s", pdev->name); + return 0; +} + + /** * platform_match - bind platform device to platform driver. * @dev: device. @@ -496,7 +530,9 @@ static int platform_resume(struct device struct bus_type platform_bus_type = { .name = "platform", + .dev_attrs = platform_dev_attrs, .match = platform_match, + .uevent = platform_uevent, .suspend = platform_suspend, .resume = platform_resume, };
Patches currently in gregkh-2.6 which might be from david-b@pacbell.net are
driver/spi-add-david-as-the-spi-subsystem-maintainer.patch driver/platform_bus-learns-about-modalias.patch driver/spi-spi_bitbang-clocking-fixes.patch driver/driver-core-config_debug_pm-covers-drivers-base-power-too.patch driver/spi-busnum-0-needs-to-work.patch driver/spi-devices-can-require-lsb-first-encodings.patch driver/spi-renamed-bitbang_transfer_setup-to-spi_bitbang_setup_transfer-and-export-it.patch driver/spi-spi-bounce-buffer-has-a-minimum-length.patch driver/spi-spi-whitespace-fixes.patch driver/spi-add-pxa2xx-ssp-spi-driver.patch driver/spi-per-transfer-overrides-for-wordsize-and-clocking.patch usb/usb-pegasus-fixes.patch usb/usb-allow-multiple-types-of-ehci-controllers-to-be-built-as-modules.patch usb/usb-fix-bug-in-ohci-hcd.c-ohci_restart.patch usb/usb-usbcore-always-turn-on-hub-port-power.patch - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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