linux-kernel - [PATCH RFC char-misc-next 0/5] misc: microchip: pci1xxxx: Add auxiliary bus driver and the GPIO driver for PIO function of pci1xxxx.

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Date:   Thu, 4 Aug 2022 22:02:14 +0530
From:   Kumaravel Thiagarajan <kumaravel.thiagarajan@...rochip.com>
To:     <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <UNGLinuxDriver@...rochip.com>, <gregkh@...uxfoundation.org>,
        <arnd@...db.de>, <dragan.cvetic@...inx.com>,
        <derek.kiernan@...inx.com>
Subject: [PATCH RFC char-misc-next 0/5] misc: microchip: pci1xxxx: Add auxiliary bus driver and the GPIO driver for PIO function of pci1xxxx.

pci1xxxx is a PCIe switch with a multi-function endpoint on one of its
downstream ports. PIO function is one of the functions in the
multi-function endpoint. PIO function combines a GPIO controller and also
an interface to program pci1xxxx'x OTP & EEPROM. This patch adds an
auxiliary bus driver that enumerates separate child devices for gpio and
OTP/EEPROM interface and the gpio controller driver for the first child.

Kumaravel Thiagarajan (5):
  misc: microchip: pci1xxxx: load auxiliary bus driver for the PIO
    function in the multi-function endpoint of pci1xxxx device.
  misc: microchip: pci1xxxx: load gpio driver for the gpio controller
    auxiliary device enumerated by the auxiliary bus driver.
  misc: microchip: pci1xxxx: Add functions to configure gpio pins as
    input / output, get status, handle I/O for gpio pins.
  misc: microchip: pci1xxxx: Add gpio irq handler and irq helper
    functions irq_ack, irq_mask, irq_unmask and irq_set_type of
    irq_chip.
  misc: microchip: pci1xxxx: Add power management functions - suspend &
    resume handlers.

 MAINTAINERS                                   |   9 +
 drivers/misc/Kconfig                          |   1 +
 drivers/misc/Makefile                         |   3 +-
 drivers/misc/mchp_pci1xxxx/Kconfig            |  10 +
 drivers/misc/mchp_pci1xxxx/Makefile           |   1 +
 drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c | 167 +++++++
 drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.h |  28 ++
 .../misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c   | 438 ++++++++++++++++++
 8 files changed, 656 insertions(+), 1 deletion(-)
 create mode 100644 drivers/misc/mchp_pci1xxxx/Kconfig
 create mode 100644 drivers/misc/mchp_pci1xxxx/Makefile
 create mode 100644 drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c
 create mode 100644 drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.h
 create mode 100644 drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c

-- 
2.25.1