[PATCH v4 0/7] Implement get_multiple for ACCES and PC/104 drivers

From: William Breathitt Gray
Date: Thu Mar 22 2018 - 08:59:46 EST


Changes in v4:
- Remove STX104 patch as it has been picked up through the IIO tree
- Utilize GENMASK for 104-IDIO-16 patch to avoid long literal bitmasks
- Fix off-by-one errors for port_mask initializations
- Add end comma to ports arrays initializations for consistency

This patchset implements get_multiple callbacks for the PC104 GPIO
drivers as well as the PCI-IDIO-16 and PCIe-IDIO-24 GPIO drivers. These
devices all acquire the multiple input lines with a single read, so
utilizing the get_multiple callback can provide improvement for those
users who regularly access multiple input lines.

While developing this patchset I noticed many of these devices make use
of Intel 8255 compatible interfaces for their I/O. I may write a generic
8255 GPIO driver in the future to reduce some of the redundant code I
see pop among the drivers for these devices.

William Breathitt Gray (7):
gpio: 104-idio-16: Implement get_multiple callback
gpio: pci-idio-16: Implement get_multiple callback
gpio: pcie-idio-24: Implement get_multiple/set_multiple callbacks
gpio: 104-dio-48e: Implement get_multiple callback
gpio: 104-idi-48: Implement get_multiple callback
gpio: gpio-mm: Implement get_multiple callback
gpio: ws16c48: Implement get_multiple callback

drivers/gpio/gpio-104-dio-48e.c | 47 ++++++++++++++++
drivers/gpio/gpio-104-idi-48.c | 47 ++++++++++++++++
drivers/gpio/gpio-104-idio-16.c | 15 +++++
drivers/gpio/gpio-gpio-mm.c | 47 ++++++++++++++++
drivers/gpio/gpio-pci-idio-16.c | 50 +++++++++++++++++
drivers/gpio/gpio-pcie-idio-24.c | 117 +++++++++++++++++++++++++++++++++++++++
drivers/gpio/gpio-ws16c48.c | 47 ++++++++++++++++
7 files changed, 370 insertions(+)

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2.16.2