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2017-12-11ARC: HSDK: Fixup DW SDIO CIU frequency to 50000000HzEugeniy Paltsev
DW SDIO controller has external CIU clock divider controlled via register in the SDIO IP. Due to its unexpected default value (we expected it to divide by 1 but in reality it divides by 8) SDIO IP uses wrong CIU clock (it should be 100000000Hz but actual is 12500000Hz) and works unstable (see STAR 9001204800). So increase SDIO CIU frequency from actual 12500000Hz to 50000000Hz by switching from the default divisor value (div-by-8) to the minimum possible value of the divisor (div-by-2) in HSDK platform code. Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2017-06-29arc: Add support for HS Development Kit boardAlexey Brodkin
ARC HS Development Kit board is a new low-cost development platform sporting ARC HS38 in real silicon with nice set of features such as: * Quad-core ARC HS38 with 512 kB L2 cache and running @1GHz * 4Gb of DDR (we use only lowest 1Gb out of it now) * Lots of DesigWare peripherals * Different connectivity modules: - Synopsys HAPS HT3 - Arduino-compatible connector - MikroBUS This initial commit supports the following peripherals: * UART (DW 8250) * Ethernet (DW GMAC) * SD/MMC (DW Mobile Storage) * USB 1.1 & 2.0 Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>