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| author | Max Filippov <jcmvbkbc@gmail.com> | 2015-02-27 06:28:00 +0300 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2015-02-27 07:55:29 +0300 |
| commit | 4949009eb8d40a441dcddcd96e101e77d31cf1b2 (patch) | |
| tree | 8ce5900ef60e24168c654174cefaf47b02837fbe /arch/xtensa/Kconfig | |
| parent | bfa76d49576599a4b9f9b7a71f23d73d6dcff735 (diff) | |
| download | linux-4949009eb8d40a441dcddcd96e101e77d31cf1b2.tar.bz2 | |
xtensa: xtfpga: fix hardware lockup caused by LCD driver
LCD driver is always built for the XTFPGA platform, but its base address
is not configurable, and is wrong for ML605/KC705. Its initialization
locks up KC705 board hardware.
Make the whole driver optional, and its base address and bus width
configurable. Implement 4-bit bus access method.
Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/Kconfig')
| -rw-r--r-- | arch/xtensa/Kconfig | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index e31d4949124a..87be10e8b57a 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -428,6 +428,36 @@ config DEFAULT_MEM_SIZE If unsure, leave the default value here. +config XTFPGA_LCD + bool "Enable XTFPGA LCD driver" + depends on XTENSA_PLATFORM_XTFPGA + default n + help + There's a 2x16 LCD on most of XTFPGA boards, kernel may output + progress messages there during bootup/shutdown. It may be useful + during board bringup. + + If unsure, say N. + +config XTFPGA_LCD_BASE_ADDR + hex "XTFPGA LCD base address" + depends on XTFPGA_LCD + default "0x0d0c0000" + help + Base address of the LCD controller inside KIO region. + Different boards from XTFPGA family have LCD controller at different + addresses. Please consult prototyping user guide for your board for + the correct address. Wrong address here may lead to hardware lockup. + +config XTFPGA_LCD_8BIT_ACCESS + bool "Use 8-bit access to XTFPGA LCD" + depends on XTFPGA_LCD + default n + help + LCD may be connected with 4- or 8-bit interface, 8-bit access may + only be used with 8-bit interface. Please consult prototyping user + guide for your board for the correct interface width. + endmenu menu "Executable file formats" |