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authorDongsheng.wang@freescale.com <Dongsheng.wang@freescale.com>2013-04-09 10:22:30 +0800
committerScott Wood <scottwood@freescale.com>2013-07-01 18:38:41 -0500
commit36ca09be6ff77a4e5b54b8b68ed7be7aa184250b (patch)
tree599bddca2be47f3c115f9afb58bf3b9386a03104 /arch/powerpc/platforms/Kconfig
parent5ff04b7287d87c1db74f47360365905ed9a97ff7 (diff)
downloadlwn-36ca09be6ff77a4e5b54b8b68ed7be7aa184250b.tar.gz
lwn-36ca09be6ff77a4e5b54b8b68ed7be7aa184250b.zip
powerpc/mpic: add global timer support
The MPIC global timer is a hardware timer inside the Freescale PIC complying with OpenPIC standard. When the specified interval times out, the hardware timer generates an interrupt. The driver currently is only tested on fsl chip, but it can potentially support other global timers complying to OpenPIC standard. The two independent groups of global timer on fsl chip, group A and group B, are identical in their functionality, except that they appear at different locations within the PIC register map. The hardware timer can be cascaded to create timers larger than the default 31-bit global timers. Timer cascade fields allow configuration of up to two 63-bit timers. But These two groups of timers cannot be cascaded together. It can be used as a wakeup source for low power modes. It also could be used as periodical timer for protocols, drivers and etc. Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com> Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/platforms/Kconfig')
-rw-r--r--arch/powerpc/platforms/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index bed8c607588c..7d07d9e8e1dd 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -86,6 +86,18 @@ config MPIC
bool
default n
+config MPIC_TIMER
+ bool "MPIC Global Timer"
+ depends on MPIC && FSL_SOC
+ default n
+ help
+ The MPIC global timer is a hardware timer inside the
+ Freescale PIC complying with OpenPIC standard. When the
+ specified interval times out, the hardware timer generates
+ an interrupt. The driver currently is only tested on fsl
+ chip, but it can potentially support other global timers
+ complying with the OpenPIC standard.
+
config PPC_EPAPR_HV_PIC
bool
default n