On 21 August 2018 at 01:43, Janusz Krzysztofik <jmkrzyszt@xxxxxxxxx> wrote: > > This series is a follow up of the former "mtd: rawnand: ams-delta: Use > gpio-omap accessors for data I/O" which already contained some changes > to gpiolib. Those previous attempts were commented by Borris Brezillon > who suggested using GPIO API modified to accept bitmaps, and by Linus > Walleij who suggested still more great ideas for further immprovement > of the proposed API changes - thanks! > > The goal is to boost performans of get/set array functions while > processing GPIO arrays which represent pins of a signle chip in > hardware order. If resulting performance is close to PIO, GPIO API > can be used for data I/O without much loss of speed. > > Created and tested on a low end Amstrad Delta board with NAND driver > updated to use GPIO API for data I/O. Performance degrade compared to > PIO is much better than before the optimization but still not quite > satisfactory. > > > Janusz Krzysztofik (4): > gpiolib: Pass bitmaps, not integer arrays, to get/set array > gpiolib: Identify arrays matching GPIO hardware > gpiolib: Pass array info to get/set array functions > gpiolib: Implement fast processing path in get/set array > > > Documentation/driver-api/gpio/board.rst | 15 + > Documentation/driver-api/gpio/consumer.rst | 48 +++- > drivers/auxdisplay/hd44780.c | 64 +++--- > drivers/bus/ts-nbus.c | 25 -- > drivers/gpio/gpio-max3191x.c | 23 +- > drivers/gpio/gpiolib.c | 279 ++++++++++++++++++++++------ > drivers/gpio/gpiolib.h | 15 + > drivers/i2c/muxes/i2c-mux-gpio.c | 5 > drivers/mmc/core/pwrseq_simple.c | 15 - > drivers/mux/gpio.c | 7 > drivers/net/phy/mdio-mux-gpio.c | 5 > drivers/pcmcia/soc_common.c | 14 - > drivers/phy/motorola/phy-mapphone-mdm6600.c | 21 +- > drivers/staging/iio/adc/ad7606.c | 12 - > drivers/tty/serial/serial_mctrl_gpio.c | 9 > include/linux/gpio/consumer.h | 35 ++- > 16 files changed, 410 insertions(+), 182 deletions(-) > For the mmc related changes: Acked-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Kind regards Uffe
