On 17 April 2017 at 09:43, Philipp Tomsich < philipp.toms...@theobroma-systems.com> wrote: > This change adds support for configuring the module clocks for SPI1 and > SPI5 from the 594MHz GPLL. > > Note that the driver (rk_spi.c) always sets this to 99MHz, but the > implemented functionality is more general and will also support > different clock configurations. > > X-AffectedPlatforms: RK3399-Q7 > Signed-off-by: Philipp Tomsich <philipp.toms...@theobroma-systems.com> > Tested-by: Jakob Unterwurzacher < jakob.unterwurzac...@theobroma-systems.com> > Tested-by: Klaus Goger <klaus.go...@theobroma-systems.com> > > Cover-Letter:
Odd that this came through - is it the capital L? > rockchip: spi: rk3399: add SPI support for the RK3399 > > This series adds SPI support for the RK3399 (SPI1 and SPI5). This > consists of the following individual changes: > - clock support for the SPI blocks clocked from GRF (i.e. SPI1, SPI2, > SPI 4 and SPI5) > - pinctrl for SPI1 and SPI5 > - changes the SPI module input clock to 198MHz (instead of 99MHz) for > the RK3399 to improve the available bitrates at higher frequencies > (e.g. adding the 39MBit and 28MBit operating points) > - modifies the calculation of the top frequency permissible (as the > 49.5MBit operating point had not been permissible due to a hard > limit at 48MBit) > END > > --- > > Changes in v3: > - replaced macro-pasting with a lookup table to improve readability > (as requested by Simon) > > Changes in v2: > - fixes a wrong macro usage, which caused the SPI module input clock > frequency to be significantly higher than intended > - frequencies have now been validated using an oscilloscope (keep in mind > that all frequencies are derived from a 99MHz module input clock) at the > following measurement points (assuming the other fix for the usage of > DIV_RATE from the series): > * 1 MHz ... 0.99 MHz > * 5 MHz ... 4.95 MHz > * 10 MHz ... 9.9 MHz > * 30 MHz ... 33 MHz > * 50 MHz ... 49.5 MHz > > drivers/clk/rockchip/clk_rk3399.c | 114 ++++++++++++++++++++++++++++++++++++-- > 1 file changed, 108 insertions(+), 6 deletions(-) Acked-by: Simon Glass <s...@chromium.org> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
