On Thu, Nov 19, 2015 at 07:38:39PM +0100, Geert Uytterhoeven wrote: > Hi, > > This patch series adds support to the Renesas SCI serial driver for > - the optional external clock on (H)SCI(F) and some SCIFA, where this > pin can serve as a clock input, > - the optional clock sources for the Baud Rate Generator for External > Clock (BRG), as found on some SCIF variants and on HSCIF. > Using external clocks increases the range and accuracy of supported baud > rates. Please see the descriptions of the DTS patches for more detailed > information regarding the impact on the supported platforms. > > For now this supports r8a7791/koelsch and r8a7795/salvator-x only, which > have an external SCIF_CLK running at 14.7456 MHz. > Support for other R-Car platforms will be added later. > > Testing: > - The Baud Rate Generator for External Clock (BRG) was tested with > SCIF and HSCIF on r8a7791/koelsch and r8a7795/salvator-x, > - The external clock input on (H)SCK was tested on r8a7795/salvator-x > by feeding an external clock signal to (H)SCIF1, > - Various bit rates were monitored using a SmartScope, > - Regression testing was done on Renesas ARM platforms that use SCIFA > as the console (r8a73a4/ape6evm, r8a7740/armadillo, and > sh73a0/kzm9g). > > Dependencies: > - This series depends on the series "[PATCH v2 00/16] serial: sh-sci: > Clock Cleanups", > - The SH patch 25 depends on the "serial: sh-sci" patches in this > series, > - The DTS patches 21-24 can be applied independently, once the DT > binding patches 1-2 are accepted, I have marked those patches as deferred pending the bindings being accepted. > - r8a7791/r8a7795 has a runtime dependency on series "[PATCH 0/2] > pinctrl: sh-pfc: r8a7791/r8a7795: Add SCIF_CLK support", > - r8a7795 also depends on > - platform support in e.g. renesas-drivers-2015-11-17-v4.4-rc1, > - "[PATCH] pinctrl: sh-pfc: r8a7795: Add HSCIF pins, groups, and > functions", > - "[PATCH] arm64: renesas: r8a7795 dtsi: Add all HSCIF nodes". > - Legacy SH has a runtime dependency on: > - series "[PATCH 0/2] drivers: sh: clk: Cleanup clock API", -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
