summaryrefslogtreecommitdiffstats
path: root/arch/xtensa/Kconfig
diff options
context:
space:
mode:
authorMax Filippov <jcmvbkbc@gmail.com>2015-02-27 06:28:00 +0300
committerMax Filippov <jcmvbkbc@gmail.com>2015-02-27 07:55:29 +0300
commit4949009eb8d40a441dcddcd96e101e77d31cf1b2 (patch)
tree8ce5900ef60e24168c654174cefaf47b02837fbe /arch/xtensa/Kconfig
parentbfa76d49576599a4b9f9b7a71f23d73d6dcff735 (diff)
downloadlinux-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/Kconfig30
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"