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For both AST2500 and AST2600, there are three
SPI controllers, FMC(Firmware Memory Controller),
SPI1 and SPI2. The clock source is HCLK. Following
is the basic information for ASPEED SPI controller.
AST2500:
- FMC:
CS number: 3
controller reg: 0x1e620000 - 0x1e62ffff
decoded address: 0x20000000 - 0x2fffffff
- SPI1:
CS number: 2
controller reg: 0x1e630000 - 0x1e630fff
decoded address: 0x30000000 - 0x37ffffff
- SPI2:
CS number: 2
controller reg: 0x1e631000 - 0x1e631fff
decoded address: 0x38000000 - 0x3fffffff
AST2600:
- FMC:
CS number: 3
controller reg: 0x1e620000 - 0x1e62ffff
decoded address: 0x20000000 - 0x2fffffff
- SPI1:
CS number: 2
controller reg: 0x1e630000 - 0x1e630fff
decoded address: 0x30000000 - 0x3fffffff
- SPI2:
CS number: 3
controller reg: 0x1e631000 - 0x1e631fff
decoded address: 0x50000000 - 0x5fffffff
Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
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Match the description used by the Linux kernel, except use scu instead
of syscon as the phandle.
Signed-off-by: Joel Stanley <joel@jms.id.au>
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Populate gpio_count in the gpio subsystem for the AST2500.
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
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This is a large update of the AST2500 SoC DTS file bringing it to the
level of commit 927c2fc2db19 :
Author: Joel Stanley <joel@jms.id.au>
Date: Sat Jun 2 01:18:53 2018 -0700
ARM: dts: aspeed: Fix hwrng register address
There are some differences on the compatibility property names. scu,
reset and clock drivers are also different.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
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Pull in the Device Tree for ast2500 from the mainline Linux kernel.
The file is copied from
https://raw.githubusercontent.com/torvalds/linux/34ea5c9d/arch/arm/boot/dts/aspeed-g5.dtsi
Signed-off-by: Maxim Sloyko <maxims@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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Clock Driver
This driver is ast2500-specific and is not compatible with earlier
versions of this chip. The differences are not that big, but they are
in somewhat random places, so making it compatible with ast2400 is not
worth the effort at the moment.
SDRAM MC driver
The driver is very ast2500-specific and is completely incompatible
with previous versions of the chip.
The memory controller is very poorly documented by Aspeed in the
datasheet, with any mention of the whole range of registers missing. The
initialization procedure has been basically taken from Aspeed SDK, where
it is implemented in assembly. Here it is rewritten in C, with very limited
understanding of what exactly it is doing.
Reviewed-by: Simon Glass <sjg@chromium.org>
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