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6a794a27da
The Aspeed AST2x00 can contain a ColdFire v1 coprocessor which is currently unused on OpenPower systems. This adds an alternative to the fsi-master-gpio driver that uses that coprocessor instead of bit banging from the ARM core itself. The end result is about 4 times faster. The firmware for the coprocessor and its source code can be found at https://github.com/ozbenh/cf-fsi and is system specific. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
53 lines
1.4 KiB
Plaintext
53 lines
1.4 KiB
Plaintext
#
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# FSI subsystem
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#
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menuconfig FSI
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tristate "FSI support"
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depends on OF
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select CRC4
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---help---
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FSI - the FRU Support Interface - is a simple bus for low-level
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access to POWER-based hardware.
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if FSI
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config FSI_MASTER_GPIO
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tristate "GPIO-based FSI master"
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depends on GPIOLIB
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select CRC4
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---help---
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This option enables a FSI master driver using GPIO lines.
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config FSI_MASTER_HUB
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tristate "FSI hub master"
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---help---
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This option enables a FSI hub master driver. Hub is a type of FSI
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master that is connected to the upstream master via a slave. Hubs
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allow chaining of FSI links to an arbitrary depth. This allows for
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a high target device fanout.
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config FSI_MASTER_AST_CF
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tristate "FSI master based on Aspeed ColdFire coprocessor"
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depends on GPIOLIB
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depends on GPIO_ASPEED
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---help---
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This option enables a FSI master using the AST2400 and AST2500 GPIO
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lines driven by the internal ColdFire coprocessor. This requires
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the corresponding machine specific ColdFire firmware to be available.
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config FSI_SCOM
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tristate "SCOM FSI client device driver"
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---help---
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This option enables an FSI based SCOM device driver.
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config FSI_SBEFIFO
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tristate "SBEFIFO FSI client device driver"
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depends on OF_ADDRESS
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---help---
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This option enables an FSI based SBEFIFO device driver. The SBEFIFO is
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a pipe-like FSI device for communicating with the self boot engine
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(SBE) on POWER processors.
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endif
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