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This works in case you have one FPGA. > > Extend this to really implement csi_b and rdwr pin function in > driver, so it works with more than one FPGA. > > Tested on AM625 based board with 2 FPGAs connected to GPMC. > > Signed-off-by: Heiko Schocher > --- > > Changes in v2: > - add comments from Michal > - skip check if gpio descriptor variables csi_b/rdwr_b are valid, > as validate_desc() checks this in gpiod_set_value() call. > - initialize the gpio variables csi_b/rdwr_b immediately with > the return value from devm_gpiod_get_optional(), so we can > drop local gpio variable at all > > drivers/fpga/xilinx-selectmap.c | 23 ++++++++++++++++------- > 1 file changed, 16 insertions(+), 7 deletions(-) > > diff --git a/drivers/fpga/xilinx-selectmap.c b/drivers/fpga/xilinx-selectmap.c > index d0cbb5fdfe3a..d5175f9430e4 100644 > --- a/drivers/fpga/xilinx-selectmap.c > +++ b/drivers/fpga/xilinx-selectmap.c > @@ -19,6 +19,8 @@ > struct xilinx_selectmap_conf { > struct xilinx_fpga_core core; > void __iomem *base; > + struct gpio_desc *csi_b; > + struct gpio_desc *rdwr_b; > }; > > #define to_xilinx_selectmap_conf(obj) \ > @@ -30,16 +32,21 @@ static int xilinx_selectmap_write(struct xilinx_fpga_core *core, > struct xilinx_selectmap_conf *conf = to_xilinx_selectmap_conf(core); > size_t i; > > + gpiod_set_value(conf->csi_b, GPIOD_OUT_HIGH); > + gpiod_set_value(conf->rdwr_b, GPIOD_OUT_HIGH); I think GPIOD_OUT_HIGH/LOW is wrong in this context. If you do "git grep gpiod_set_value" you will see that values are 0/1 Thanks, Michal