[PATCH v2 0/3] pinctrl: amd: Add Remote GPIO (RGPIO) bank support

[Basavaraj Natikar <Basavaraj.Natikar@amd.com>]

Some AMD platforms expose a second GPIO register bank, Remote GPIO
(RGPIO), covering pins 256-271 through a separate MMIO region that the
platform advertises by name. This series adds support for it.

The first two patches are preparation: one centralizes per-pin register
access behind a single helper, the other factors the optional
named-resource lookup into a reusable helper with a minimum-size check.
The last patch adds the RGPIO bank itself, including its pins, groups,
pinmux and interrupts.

The RGPIO pins are registered only when the platform advertises the
region and the main bank spans the expected number of registers, so
platforms that do not expose it are unaffected.

Changes in v2:
- Rebased onto the pinctrl "devel" branch (Linus Walleij).

Basavaraj Natikar (3):
  pinctrl: amd: Centralize per-pin register access
  pinctrl: amd: Factor out optional named resource lookup
  pinctrl: amd: Add support for the Remote GPIO (RGPIO) bank

 drivers/pinctrl/pinctrl-amd.c | 237 ++++++++++++++++++++++++++--------
 drivers/pinctrl/pinctrl-amd.h | 174 +++++++++++++++++++++++++
 2 files changed, 354 insertions(+), 57 deletions(-)

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2.34.1