On Thu, Jul 31, 2014 at 10:42 AM, Rojhalat Ibrahim <[email protected]> wrote: > On Thursday 31 July 2014 09:12:35 Gerhard Sittig wrote: >> On Thu, 2014-07-31 at 11:35 +0900, Alexandre Courbot wrote: >> > >> > I'd be surprised if at least *one* such driver was not in mainline >> > though. Had a quick look but could not find anything that would be an >> > obvious candidate to use these new functions. >> >> What about drivers/mtd/nand/gpio.c, the GPIO bitbanged NAND >> controller driver? Most of the latch, control, and data lines >> groups are set at the same time. It should be a perfect example. >> > > Well, not so perfect, since AFAIUI only a few control signals are managed > by GPIOs (Chip Enable, Command Latch Enable, Address Latch Enable), but not > the actual data lines. But granted, at least at one place in the driver three > lines are set at the same time. > > There are a few other drivers which also do that: > - drivers/tty/serial/serial_mctrl_gpio.c controls multiple modem lines via > GPIO > - drivers/net/phy/mdio-mux-gpio.c a GPIO controlled MDIO bus multiplexer > driver > - drivers/regulator/gpio-regulator.c controls voltage regulators > > All of the above do set multiple GPIOs at the same time, but in all cases > performance does not really matter. Moreover they all seem a bit obscure to > me. > > Nevertheless, IMHO they are still better candidates for using the new > functions > than the i2c-gpio or spi-gpio drivers. > > So, Linus, would a patched version of one of the mentioned drivers qualify as > a user that would allow you to merge my patch?
I think so. My concern is with code that doesn't get exercised, anywhere. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
