Commit 393fc2f5 authored Aug 25, 2022 by Kumaravel Thiagarajan Committed by Greg Kroah-Hartman Sep 02, 2022

misc: microchip: pci1xxxx: load auxiliary bus driver for the PIO function in...

misc: microchip: pci1xxxx: load auxiliary bus driver for the PIO function in the multi-function endpoint of pci1xxxx device.

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's OTP & EEPROM. This auxiliary bus driver
is loaded for the PIO function and separate child devices are enumerated
for GPIO controller and OTP/EEPROM interface.

Signed-off-by: Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>
Link: https://lore.kernel.org/r/20220824200047.150308-2-kumaravel.thiagarajan@microchip.com

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent a68108c8

MAINTAINERS

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Original line number	Diff line number	Diff line
		@@ -13422,6 +13422,13 @@ S: Supported
		F: Documentation/devicetree/bindings/mtd/atmel-nand.txt
		F: drivers/mtd/nand/raw/atmel/*

		MICROCHIP PCI1XXXX GP DRIVER
		M: Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>
		L: linux-gpio@vger.kernel.org
		S: Supported
		F: drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c
		F: drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.h

		MICROCHIP OTPC DRIVER
		M: Claudiu Beznea <claudiu.beznea@microchip.com>
		L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)

drivers/misc/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -513,4 +513,5 @@ source "drivers/misc/cardreader/Kconfig"
		source "drivers/misc/habanalabs/Kconfig"
		source "drivers/misc/uacce/Kconfig"
		source "drivers/misc/pvpanic/Kconfig"
		source "drivers/misc/mchp_pci1xxxx/Kconfig"
		endmenu

drivers/misc/Makefile

+2 −1

Original line number	Diff line number	Diff line
		@@ -60,4 +60,5 @@ obj-$(CONFIG_XILINX_SDFEC) += xilinx_sdfec.o
		obj-$(CONFIG_HISI_HIKEY_USB) += hisi_hikey_usb.o
		obj-$(CONFIG_HI6421V600_IRQ) += hi6421v600-irq.o
		obj-$(CONFIG_OPEN_DICE) += open-dice.o
		obj-$(CONFIG_GP_PCI1XXXX) += mchp_pci1xxxx/
		obj-$(CONFIG_VCPU_STALL_DETECTOR) += vcpu_stall_detector.o

drivers/misc/mchp_pci1xxxx/Kconfig

0 → 100644

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Original line number	Diff line number	Diff line
		config GP_PCI1XXXX
		tristate "Microchip PCI1XXXX PCIe to GPIO Expander + OTP/EEPROM manager"
		depends on PCI
		select GPIOLIB_IRQCHIP
		help
		PCI1XXXX is a PCIe GEN 3 switch with one of the endpoints having
		multiple functions and one of the functions is a GPIO controller
		which also has registers to interface with the OTP and EEPROM.
		Select yes, no or module here to include or exclude the driver
		for the GPIO function.

drivers/misc/mchp_pci1xxxx/Makefile

0 → 100644

+1 −0

Original line number	Diff line number	Diff line
		obj-$(CONFIG_GP_PCI1XXXX) := mchp_pci1xxxx_gp.o