pinctrl: qcom: add support for sparse GPIOs

A series of patches that add support for GPIO maps that have holes in them. That is, even though a client driver has N consecutive GPIOs, some are just unavailable for whatever reason, and the hardware should not be accessed for those GPIOs.

Patch 1 reverts an old patch that triggers a get_direction of every pin upon init, without attempting to request the pins first. The direction is already being queried when the pin is requested.

Patch 2 adds support to pinctrl-msm for "unavailable" GPIOs.

Patch 3 extends that support to pinctrl-qdf2xxx. A recent ACPI change on QDF2400 platforms blocks access to most pins, so the driver can only register a subset.

This version drops the availability check in gpiolib, because it's no necessary. Instead, just having pinctrl-msm return -EACCES is enough to block all unavailable GPIOs. Patch 1 removes the only instance where an unrequested GPIO is being accessed.

v11:
Drop support for QCOM8001

Timur Tabi (3):
[v2] Revert "gpio: set up initial state from .get_direction()" [v8] pinctrl: qcom: disable GPIO groups with no pins [v7] pinctrl: qcom: qdf2xxx: add support for new ACPI HID QCOM8002

 drivers/gpio/gpiolib.c                 | 31 +++--------
 drivers/pinctrl/qcom/pinctrl-msm.c     | 28 ++++++++--
 drivers/pinctrl/qcom/pinctrl-qdf2xxx.c | 96 ++++++++++++++++++++++------------
 3 files changed, 94 insertions(+), 61 deletions(-)

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Technologies, Inc.  Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.