From: Christopher Hill Subject: [PATCH] ath79: add Mikrotik rb4xx series drivers This adds 3 Mikrotik rb4xx series drivers as follows: rb4xx-cpld: This is in the mfd subsystem, and is the parent CPLD device that interfaces between the SoC SPI bus and its two children below. rb4xx-gpio: This is the GPIO expander. rb4xx-nand: This is the NAND driver. The history of this code comes in three phases. 1. The first is a May 2015 attempt to push the equivalient ar71xx rb4xx drivers upstream. See https://lore.kernel.org/patchwork/patch/940880/. Module-author: Gabor Juhos Module-author: Imre Kaloz Module-author: Bert Vermeulen 2. Next several ar71xx patches were applied bringing the code current. commit 7bbf4117c6fe4b764d9d7c62fb2bcf6dd93bff2c Submitted-by: Hauke Mehrtens commit af79fdbe4af32a287798b579141204bda056b8aa commit 889272d92db689fd9c910243635e44c9d8323095 commit e21cb649a235180563363b8af5ba8296b9ac0baa commit 7c09fa4a7492ca436f2c94bd9a465b7c5bbeed6f Submitted-by: Felix Fietkau 3. Finally a heavy refactor to split the driver into the three new subsystems, and updated to work with the device tree configuration, plus updates and review feedback incorporated Reviewed-by: Thibaut VARÈNE Submitted-by: Christopher Hill --- drivers/mfd/Kconfig | 8 ++++++++ drivers/mfd/Makefile | 1 + drivers/gpio/Kconfig | 6 ++++++ drivers/gpio/Makefile | 1 + drivers/mtd/nand/raw/Kconfig | 7 +++++++ drivers/mtd/nand/raw/Makefile | 1 + 6 files changed, 24 insertions(+) --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2142,6 +2142,14 @@ config RAVE_SP_CORE Select this to get support for the Supervisory Processor device found on several devices in RAVE line of hardware. +config MFD_RB4XX_CPLD + tristate "CPLD driver for Mikrotik RB4xx series boards" + select MFD_CORE + depends on ATH79 || COMPILE_TEST + help + Enables support for the CPLD chip (NAND & GPIO) on Mikrotik + Routerboard RB4xx series. + config SGI_MFD_IOC3 tristate "SGI IOC3 core driver" depends on PCI && MIPS && 64BIT --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -264,6 +264,7 @@ obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-b obj-$(CONFIG_MFD_STMFX) += stmfx.o obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o +obj-$(CONFIG_MFD_RB4XX_CPLD) += rb4xx-cpld.o obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1520,6 +1520,12 @@ config GPIO_SODAVILLE help Say Y here to support Intel Sodaville GPIO. +config GPIO_RB4XX + tristate "GPIO expander for Mikrotik RB4xx series boards" + depends on MFD_RB4XX_CPLD + help + GPIO driver for Mikrotik Routerboard RB4xx series. + endmenu menu "SPI GPIO expanders" --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -121,6 +121,7 @@ obj-$(CONFIG_GPIO_PL061) += gpio-pl061. obj-$(CONFIG_GPIO_PMIC_EIC_SPRD) += gpio-pmic-eic-sprd.o obj-$(CONFIG_GPIO_PXA) += gpio-pxa.o obj-$(CONFIG_GPIO_RASPBERRYPI_EXP) += gpio-raspberrypi-exp.o +obj-$(CONFIG_GPIO_RB4XX) += gpio-rb4xx.o obj-$(CONFIG_GPIO_RC5T583) += gpio-rc5t583.o obj-$(CONFIG_GPIO_RCAR) += gpio-rcar.o obj-$(CONFIG_GPIO_RDA) += gpio-rda.o --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -564,4 +564,11 @@ config MTD_NAND_AR934X Enables support for NAND controller on Qualcomm Atheros SoCs. This controller is found on AR934x and QCA955x SoCs. +config MTD_NAND_RB4XX + tristate "Support for NAND driver for Mikrotik RB4xx series boards" + depends on MFD_RB4XX_CPLD + help + Enables support for the NAND flash chip on Mikrotik Routerboard + RB4xx series. + endif # MTD_RAW_NAND --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -59,6 +59,7 @@ obj-$(CONFIG_MTD_NAND_MESON) += meson_n obj-$(CONFIG_MTD_NAND_CADENCE) += cadence-nand-controller.o obj-$(CONFIG_MTD_NAND_ARASAN) += arasan-nand-controller.o obj-$(CONFIG_MTD_NAND_AR934X) += ar934x_nand.o +obj-$(CONFIG_MTD_NAND_RB4XX) += nand_rb4xx.o nand-objs := nand_base.o nand_legacy.o nand_bbt.o nand_timings.o nand_ids.o nand-objs += nand_onfi.o