gpio: bt8xx: use devm_ioremap_resource()

Replace the open-coded devm_request_mem_region() plus devm_ioremap()
sequence with a single devm_ioremap_resource() call on the BAR0 resource.
This reserves the region and maps it in one step, and maps the full BAR
length instead of a hardcoded 0x1000 (BAR0 on the bt848/878 is a 4KB
register block, so the mapped size is unchanged).

devm_ioremap_resource() returns an ERR_PTR() on failure, so check with
IS_ERR() and propagate PTR_ERR(). Drop the now-redundant error message,
as devm_ioremap_resource() already logs on every failure path. Since it
can return -EPROBE_DEFER, place it early.

Built for ARM (defconfig + CONFIG_GPIO_BT8XX) with LLVM=1;
drivers/gpio/gpio-bt8xx.o compiles cleanly.

Assisted-by: opencode:hy3-free
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260713232810.1144712-1-rosenp@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

0 files changed, 0 insertions, 0 deletions