diff options
| author | Serge Semin <Sergey.Semin@baikalelectronics.ru> | 2020-05-21 17:07:19 +0300 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-05-22 09:12:52 +0200 |
| commit | ad42e0a8d4d5abd7243597b1a4f5ab4ede09f25a (patch) | |
| tree | 7d1147652a430ffae621417ea13ffe41c5ab8858 /arch/mips/Kconfig.debug | |
| parent | 999079c851b46fd945a8b074d115f9f08a056ca9 (diff) | |
| download | linux-ad42e0a8d4d5abd7243597b1a4f5ab4ede09f25a.tar.gz | |
mips: Add CPS_NS16550_WIDTH config
On some platforms IO-memory might require to use a proper load/store
instructions (like Baikal-T1 IO-memory). To fix the cps-vec UART debug
printout let's add the CONFIG_CPS_NS16550_WIDTH config to determine which
instructions lb/sb, lh/sh or lw/sw are required for MMIO operations.
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips/Kconfig.debug')
| -rw-r--r-- | arch/mips/Kconfig.debug | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug index 93a2974d2ab7..7a8d94cdd493 100644 --- a/arch/mips/Kconfig.debug +++ b/arch/mips/Kconfig.debug @@ -148,4 +148,14 @@ config MIPS_CPS_NS16550_SHIFT form their addresses. That is, log base 2 of the span between adjacent ns16550 registers in the system. +config MIPS_CPS_NS16550_WIDTH + int "UART Register Width" + default 1 + help + ns16550 registers width. UART registers IO access methods will be + selected in accordance with this parameter. By setting it to 1, 2 or + 4 UART registers will be accessed by means of lb/sb, lh/sh or lw/sw + instructions respectively. Any value not from that set activates + lb/sb instructions. + endif # MIPS_CPS_NS16550_BOOL |