Hi, Roger Quadros <rogerq@xxxxxx> writes: >> The sysfs file we expose from the class for the role switches is >> primarily meant for supporting proprietary protocols that require us >> to basically override the connector USB data role. The default role >> should always be selected in the drivers. > > OK. Let's take this example > - Port is dual-role port micro AB. > - microAB to type-A adapter is connected which pulls ID low. port transitions > to "host" role by the controller driver. > - proprietary protocol want to switch role to device role so writes "device" to > mode switch sysfs. port transitions to "device" role. > > Now, how does controller driver know to fall back to HW based role switching? Use a 'disconnect' or 'suspend' event to go reset it? But that should, probably, be done at kernel space, no? -- balbi
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