Hi Stefan, On Mon, Jan 18, 2016 at 5:56 PM, Stefan Roese <s...@denx.de> wrote: > Some BayTrail boards may want to use a different legacy UART than the > internal one. E.g. one provided by a Winbond Super IO chip, like the > W83627. This patch adds a function to disable this BayTrail internal > UART for this purpose. > > Signed-off-by: Stefan Roese <s...@denx.de> > Cc: Bin Meng <bmeng...@gmail.com> > Cc: Simon Glass <s...@chromium.org> > --- > arch/x86/cpu/baytrail/early_uart.c | 9 +++++++++ > arch/x86/include/asm/u-boot-x86.h | 3 +++ > 2 files changed, 12 insertions(+) > > diff --git a/arch/x86/cpu/baytrail/early_uart.c > b/arch/x86/cpu/baytrail/early_uart.c > index b64a3a9..716783c 100644 > --- a/arch/x86/cpu/baytrail/early_uart.c > +++ b/arch/x86/cpu/baytrail/early_uart.c > @@ -76,3 +76,12 @@ int setup_early_uart(void) > > return 0; > } > + > +int disable_internal_uart(void) > +{ > + /* Disable the legacy UART hardware. */
nits: please remove the ending peirod. > + x86_pci_write_config32(PCI_DEV_CONFIG(0, LPC_DEV, LPC_FUNC), > UART_CONT, > + 0); > + > + return 0; > +} > diff --git a/arch/x86/include/asm/u-boot-x86.h > b/arch/x86/include/asm/u-boot-x86.h > index dbf8e95..0c95796 100644 > --- a/arch/x86/include/asm/u-boot-x86.h > +++ b/arch/x86/include/asm/u-boot-x86.h > @@ -47,6 +47,9 @@ int default_print_cpuinfo(void); > /* Set up a UART which can be used with printch(), printhex8(), etc. */ > int setup_early_uart(void); > > +/* Disable the internal legacy UART */ > +int disable_internal_uart(void); > + > void setup_pcat_compatibility(void); > > void isa_unmap_rom(u32 addr); > -- Reviewed-by: Bin Meng <bmeng...@gmail.com> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot