Messages in this thread Patch in this message | | | From | Wenchao Hao <> | Subject | [PATCH] driver core: Make probe_type of driver accessible via sysfs | Date | Thu, 8 Jul 2021 20:20:10 +0800 |
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Like drivers_autoprobe of bus, make probe_type of driver accessible via sysfs, so we can get and set a driver's probe_type happily.
Signed-off-by: Wenchao Hao <haowenchao@huawei.com> --- drivers/base/bus.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 1f6b4bd61056..e006562cb638 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -583,6 +583,25 @@ static ssize_t uevent_store(struct device_driver *drv, const char *buf, } static DRIVER_ATTR_WO(uevent); +static ssize_t probe_type_show(struct device_driver *drv, char *buf) +{ + return sysfs_emit(buf, "%d\n", drv->probe_type); +} + +static ssize_t probe_type_store(struct device_driver *drv, const char *buf, + size_t count) +{ + if (buf[0] == '0') + drv->probe_type = 0; + else if (buf[0] == '1') + drv->probe_type = 1; + else if (buf[0] == '2') + drv->probe_type = 2; + + return count; +} +static DRIVER_ATTR_RW(probe_type); + /** * bus_add_driver - Add a driver to the bus. * @drv: driver. @@ -626,6 +645,12 @@ int bus_add_driver(struct device_driver *drv) printk(KERN_ERR "%s: uevent attr (%s) failed\n", __func__, drv->name); } + error = driver_create_file(drv, &driver_attr_probe_type); + if (error) { + printk(KERN_ERR "%s: probe_type attr (%s) failed\n", + __func__, drv->name); + } + error = driver_add_groups(drv, bus->drv_groups); if (error) { /* How the hell do we get out of this pickle? Give up */ -- 2.27.0
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