1. 06 Oct, 2016 5 commits
    • Paul Burton's avatar
      MIPS: SEAD3: Use img-ascii-lcd driver · 5e189564
      Paul Burton authored
      Probe the img-ascii-lcd driver using device tree in order to display a
      message on the SEAD3 board's LCD display, and remove the platform code
      that was formerly performing this function. This removes more platform
      code and moves SEAD3 further towards being entirely DT-based.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14063/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      5e189564
    • Paul Burton's avatar
      auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays · 0cad855f
      Paul Burton authored
      Add a driver for simple ASCII LCD displays found on the MIPS Boston,
      Malta & SEAD3 development boards. The Boston display is an independent
      memory mapped device with a simple memory mapped 8 byte register space
      containing the 8 ASCII characters to display. The Malta display is
      exposed as part of the Malta board registers, and provides 8 registers
      each of which corresponds to one of the ASCII characters to display. The
      SEAD3 display is slightly more complex, exposing an interface to an
      S6A0069 LCD controller via registers provided by the boards CPLD.
      However although the displays differ in their register interface, we
      require similar functionality on each board so abstracting away the
      differences within a single driver allows us to share a significant
      amount of code & ensure consistent behaviour.
      
      The driver displays the Linux kernel version as the default message, but
      allows the message to be changed via a character device. Messages longer
      then the number of characters that the display can show will scroll.
      
      This provides different behaviour to the existing LCD display code for
      the MIPS Malta or MIPS SEAD3 platforms in the following ways:
      
        - The default string to display is not "LINUX ON MALTA" or "LINUX ON
          SEAD3" but "Linux" followed by the version number of the kernel
          (UTS_RELEASE).
      
        - Since that string tends to be significantly longer it scrolls twice
          as fast, moving every 500ms rather than every 1s.
      
        - The LCD won't be updated until the driver is probed, so it doesn't
          provide the early "LINUX" string.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
      Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
      Cc: Guenter Roeck <linux@roeck-us.net>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: linux-mips@linux-mips.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14062/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      0cad855f
    • Paul Burton's avatar
      dt-bindings: img-ascii-lcd: Document a binding for simple ASCII LCDs · 8ef3ff27
      Paul Burton authored
      Add documentation for a devicetree binding for the simple ASCII LCD
      displays found on development boards such as the MIPS Boston, MIPS Malta
      & MIPS SEAD3 from Imagination Technologies.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Acked-by: default avatarRob Herring <robh@kernel.org>
      Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
      Cc: Guenter Roeck <linux@roeck-us.net>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: linux-mips@linux-mips.org
      Cc: devicetree@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14061/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      8ef3ff27
    • Paul Burton's avatar
      FBDEV: cobalt_lcdfb: Drop SEAD3 support · eb42d760
      Paul Burton authored
      The SEAD3 board no longer uses the cobalt_lcdfb driver, so remove the
      SEAD3-specific code from it.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Acked-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
      Cc: Ondrej Zary <linux@rainbow-software.org>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Robert Jarzmik <robert.jarzmik@free.fr>
      Cc: Maciej W. Rozycki <macro@linux-mips.org>
      Cc: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
      Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
      Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
      Cc: Geert Uytterhoeven <geert+renesas@glider.be>
      Cc: Simon Horman <horms+renesas@verge.net.au>
      Cc: linux-mips@linux-mips.org
      Cc: linux-fbdev@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14060/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      eb42d760
    • Paul Burton's avatar
      MIPS: SEAD3: Drop use of cobalt fbdev driver · ec5218a2
      Paul Burton authored
      The 2 line * 16 character LCD display on the SEAD3 board has no real use
      as a framebuffer device. It's far too small to produce any meaningful
      output if used as the kernel console, SEAD3 is a development board that
      will essentially always have a far more useful UART connection & the
      code in sead3-display.c will overwrite whatever's on the display every
      second anyway. Remove this unused code.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
      Cc: linux-mips@linux-mips.org
      Cc: linux-kernel@vger.kernel.org
      Patchwork: https://patchwork.linux-mips.org/patch/14059/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      ec5218a2
  2. 04 Oct, 2016 35 commits