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- From: Denis Kalashnikov <[email protected]>
- Subject: [PATCH] ath79: add support for reset key on MikroTik RB912UAG-2HPnD
- On MikroTik RB91x board series a reset key shares SoC gpio
- line #15 with NAND ALE and NAND IO7. So we need a custom
- gpio driver to manage this non-trivial connection schema.
- Also rb91x-nand needs to have an ability to disable a polling
- of the key while it works with NAND.
- While we've been integrating rb91x-key into a firmware, we've
- figured out that:
- * In the gpio-latch driver we need to add a "cansleep" suffix to
- several gpiolib calls,
- * When gpio-latch and rb91x-nand fail to get a gpio and an error
- is -EPROBE_DEFER, they shouldn't report about this, since this
- actually is not an error and occurs when the gpio-latch probe
- function is called before the rb91x-key probe.
- We fix these related things here too.
- Submitted-by: Denis Kalashnikov <[email protected]>
- Reviewed-by: Sergey Ryazanov <[email protected]>
- Tested-by: Koen Vandeputte <[email protected]>
- ---
- drivers/gpio/Kconfig | 11 +++++++++++
- drivers/gpio/Makefile | 2 ++
- drivers/mtd/nand/raw/Kconfig | 6 ++++++
- drivers/mtd/nand/raw/Makefile | 1 +
- 7 files changed, 20 insertions(+)
- --- a/drivers/gpio/Kconfig
- +++ b/drivers/gpio/Kconfig
- @@ -368,6 +368,12 @@ config GPIO_IXP4XX
-
- If unsure, say N.
-
- +config GPIO_LATCH
- + tristate "MikroTik RouterBOARD GPIO latch support"
- + depends on ATH79
- + help
- + GPIO driver for latch on some MikroTik RouterBOARDs.
- +
- config GPIO_LOGICVC
- tristate "Xylon LogiCVC GPIO support"
- depends on MFD_SYSCON && OF
- @@ -544,6 +550,10 @@ config GPIO_ROCKCHIP
- help
- Say yes here to support GPIO on Rockchip SoCs.
-
- +config GPIO_RB91X_KEY
- + tristate "MikroTik RB91x board series reset key support"
- + depends on ATH79
- +
- config GPIO_SAMA5D2_PIOBU
- tristate "SAMA5D2 PIOBU GPIO support"
- depends on MFD_SYSCON
- --- a/drivers/gpio/Makefile
- +++ b/drivers/gpio/Makefile
- @@ -76,6 +76,7 @@ obj-$(CONFIG_GPIO_IT87) += gpio-it87.o
- obj-$(CONFIG_GPIO_IXP4XX) += gpio-ixp4xx.o
- obj-$(CONFIG_GPIO_JANZ_TTL) += gpio-janz-ttl.o
- obj-$(CONFIG_GPIO_KEMPLD) += gpio-kempld.o
- +obj-$(CONFIG_GPIO_LATCH) += gpio-latch.o
- obj-$(CONFIG_GPIO_LOGICVC) += gpio-logicvc.o
- obj-$(CONFIG_GPIO_LOONGSON1) += gpio-loongson1.o
- obj-$(CONFIG_GPIO_LOONGSON) += gpio-loongson.o
- @@ -124,6 +125,7 @@ obj-$(CONFIG_GPIO_PMIC_EIC_SPRD) += gpio
- obj-$(CONFIG_GPIO_PXA) += gpio-pxa.o
- obj-$(CONFIG_GPIO_RASPBERRYPI_EXP) += gpio-raspberrypi-exp.o
- obj-$(CONFIG_GPIO_RB4XX) += gpio-rb4xx.o
- +obj-$(CONFIG_GPIO_RB91X_KEY) += gpio-rb91x-key.o
- obj-$(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
- @@ -572,4 +572,10 @@ config MTD_NAND_RB4XX
- Enables support for the NAND flash chip on Mikrotik Routerboard
- RB4xx series.
-
- +config MTD_NAND_RB91X
- + tristate "MikroTik RB91x NAND driver support"
- + depends on ATH79 && MTD_RAW_NAND
- + help
- + Enables support for the NAND flash chip on MikroTik RB91x series.
- +
- endif # MTD_RAW_NAND
- --- a/drivers/mtd/nand/raw/Makefile
- +++ b/drivers/mtd/nand/raw/Makefile
- @@ -61,6 +61,7 @@ obj-$(CONFIG_MTD_NAND_PL35X) += pl35x-n
- obj-$(CONFIG_MTD_NAND_RENESAS) += renesas-nand-controller.o
- obj-$(CONFIG_MTD_NAND_AR934X) += ar934x_nand.o
- obj-$(CONFIG_MTD_NAND_RB4XX) += nand_rb4xx.o
- +obj-$(CONFIG_MTD_NAND_RB91X) += rb91x_nand.o
-
- nand-objs := nand_base.o nand_legacy.o nand_bbt.o nand_timings.o nand_ids.o
- nand-objs += nand_onfi.o
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