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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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85ae9e512f
It should be possible to use the GPIOLIB_IRQCHIP helper library with the BCM2835 driver since it is a pretty straight forward cascaded irqchip. The only difference from other drivers is that the BCM2835 has several banks for a single gpiochip, and each bank has a separate IRQ line. Instead of creating one gpiochip per bank, a single gpiochip covers all banks GPIO lines. This makes it necessary to resolve the bank ID in the IRQ handler. The GPIOLIB_IRQCHIP allows several IRQs to be cascaded off the same gpiochip by calling gpiochip_set_chained_irqchip() repeatedly, but we have been a bit short on examples for how this should be handled in practice, so this is intended as an example of how this can be achieved. The old code did not model the chip as a chained interrupt handler, but this patch also rectifies that situation. Cc: Stephen Warren <swarren@wwwdotorg.org> Tested-by: Stefan Wahren <stefan.wahren@i2se.com> Tested-by: Eric Anholt <eric@anholt.net> Acked-by: Eric Anholt <eric@anholt.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
118 lines
3.7 KiB
Plaintext
118 lines
3.7 KiB
Plaintext
#
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# Broadcom pinctrl drivers
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#
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config PINCTRL_BCM281XX
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bool "Broadcom BCM281xx pinctrl driver"
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depends on OF && (ARCH_BCM_MOBILE || COMPILE_TEST)
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select PINMUX
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select PINCONF
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select GENERIC_PINCONF
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select REGMAP_MMIO
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default ARCH_BCM_MOBILE
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help
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Say Y here to support Broadcom BCM281xx pinctrl driver, which is used
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for the BCM281xx SoC family, including BCM11130, BCM11140, BCM11351,
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BCM28145, and BCM28155 SoCs. This driver requires the pinctrl
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framework. GPIO is provided by a separate GPIO driver.
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config PINCTRL_BCM2835
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bool
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select PINMUX
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select PINCONF
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select GPIOLIB_IRQCHIP
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config PINCTRL_IPROC_GPIO
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bool "Broadcom iProc GPIO (with PINCONF) driver"
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depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)
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select GPIOLIB_IRQCHIP
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select PINCONF
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select GENERIC_PINCONF
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default ARCH_BCM_IPROC
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help
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Say yes here to enable the Broadcom iProc GPIO driver.
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The Broadcom iProc based SoCs- Cygnus, NS2, NSP and Stingray, use
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same GPIO Controller IP hence this driver could be used for all.
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The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
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GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
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the always-ON GPIO controller (CRMU/AON). All 3 GPIO controllers are
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supported by this driver.
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The Broadcom NSP has two GPIO controllers including the ChipcommonA
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GPIO, the ChipcommonB GPIO. Later controller is supported by this
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driver.
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The Broadcom NS2 has two GPIO controller including the CRMU GPIO,
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the ChipcommonG GPIO. Both controllers are supported by this driver.
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The Broadcom Stingray GPIO controllers are supported by this driver.
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All above SoCs GPIO controllers support basic PINCONF functions such
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as bias pull up, pull down, and drive strength configurations, when
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these pins are muxed to GPIO.
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It provides the framework where pins from the individual GPIO can be
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individually muxed to GPIO function, through interaction with the
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SoCs IOMUX controller. This features could be used only on SoCs which
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support individual pin muxing.
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config PINCTRL_CYGNUS_MUX
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bool "Broadcom Cygnus IOMUX driver"
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depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
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depends on OF
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select PINMUX
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select GENERIC_PINCONF
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default ARCH_BCM_CYGNUS
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help
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Say yes here to enable the Broadcom Cygnus IOMUX driver.
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The Broadcom Cygnus IOMUX driver supports group based IOMUX
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configuration, with the exception that certain individual pins
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can be overrided to GPIO function
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config PINCTRL_NSP_GPIO
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bool "Broadcom NSP GPIO (with PINCONF) driver"
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depends on OF_GPIO && (ARCH_BCM_NSP || COMPILE_TEST)
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select GPIOLIB_IRQCHIP
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select PINCONF
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select GENERIC_PINCONF
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default ARCH_BCM_NSP
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help
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Say yes here to enable the Broadcom NSP GPIO driver.
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The Broadcom Northstar Plus SoC ChipcommonA GPIO controller is
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supported by this driver.
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The ChipcommonA GPIO controller support basic PINCONF functions such
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as bias pull up, pull down, and drive strength configurations, when
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these pins are muxed to GPIO.
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config PINCTRL_NS2_MUX
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bool "Broadcom Northstar2 pinmux driver"
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depends on OF
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depends on ARCH_BCM_IPROC || COMPILE_TEST
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select PINMUX
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select GENERIC_PINCONF
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default ARM64 && ARCH_BCM_IPROC
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help
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Say yes here to enable the Broadcom NS2 MUX driver.
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The Broadcom Northstar2 IOMUX driver supports group based IOMUX
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configuration.
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config PINCTRL_NSP_MUX
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bool "Broadcom NSP IOMUX driver"
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depends on (ARCH_BCM_NSP || COMPILE_TEST)
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depends on OF
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select PINMUX
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select GENERIC_PINCONF
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default ARCH_BCM_NSP
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help
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Say yes here to enable the Broadcom NSP SOC IOMUX driver.
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The Broadcom Northstar Plus IOMUX driver supports pin based IOMUX
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configuration, with certain individual pins can be overridden
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to GPIO function.
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