diff options
Diffstat (limited to 'recipes/linux/linux-omap2-git/beagleboard/02-beagle_use_gptimer12')
| -rw-r--r-- | recipes/linux/linux-omap2-git/beagleboard/02-beagle_use_gptimer12 | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap2-git/beagleboard/02-beagle_use_gptimer12 b/recipes/linux/linux-omap2-git/beagleboard/02-beagle_use_gptimer12 new file mode 100644 index 0000000000..51d2c8cff0 --- /dev/null +++ b/recipes/linux/linux-omap2-git/beagleboard/02-beagle_use_gptimer12 @@ -0,0 +1,38 @@ +BeagleBoard: make Beagle use GPTIMER12 for system ticks + +From: Paul Walmsley <paul@pwsan.com> + +There is suspicion that the 32kHz input clock to the OMAP may be noisy +on BeagleBoards. On OMAP2/3 GPTIMER1, this can cause the timer +counter register to warp to unknown values or miss interrupt +conditions. So, use GPTIMER12 instead, which apparently has its own +secure 32kHz oscillator and will hopefully not be prone to the 32kHz +glitches. +--- + + arch/arm/configs/omap3_beagle_defconfig | 5 +++-- + 1 files changed, 3 insertions(+), 2 deletions(-) + +diff --git a/arch/arm/configs/omap3_beagle_defconfig b/arch/arm/configs/omap3_beagle_defconfig +index e1b16d0..7805995 100644 +--- a/arch/arm/configs/omap3_beagle_defconfig ++++ defconfig +@@ -182,8 +182,8 @@ CONFIG_OMAP_BOOT_REASON=y + # CONFIG_OMAP_MCBSP is not set + # CONFIG_OMAP_MMU_FWK is not set + # CONFIG_OMAP_MBOX_FWK is not set +-CONFIG_OMAP_MPU_TIMER=y +-# CONFIG_OMAP_32K_TIMER is not set ++# CONFIG_OMAP_MPU_TIMER is not set ++CONFIG_OMAP_32K_TIMER=y + CONFIG_OMAP_DM_TIMER=y + # CONFIG_OMAP_LL_DEBUG_UART1 is not set + # CONFIG_OMAP_LL_DEBUG_UART2 is not set +@@ -198,6 +198,7 @@ CONFIG_ARCH_OMAP3430=y + # CONFIG_MACH_OMAP_3430SDP is not set + # CONFIG_MACH_OMAP3EVM is not set + CONFIG_MACH_OMAP3_BEAGLE=y ++CONFIG_OMAP_TICK_GPTIMER=12 + + # + # Boot options |