On 03/26/2013 12:28:10 AM, Jia Hongtao wrote:
MPIC version is useful information for both mpic_alloc() and
mpic_init().
The patch provide an API to get MPIC version for reusing the code.
Also, some other IP block may need MPIC version for their own use.
The API for external use is also provided.
Signed-off-by: Jia Hongtao <hongtao....@freescale.com>
Signed-off-by: Li Yang <le...@freescale.com>
---
Changes for V2:
* Using mpic_get_version() to implement mpic_primary_get_version()
arch/powerpc/include/asm/mpic.h | 3 +++
arch/powerpc/sysdev/mpic.c | 26 +++++++++++++++++++-------
2 files changed, 22 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/include/asm/mpic.h
b/arch/powerpc/include/asm/mpic.h
index c0f9ef9..7d1222d 100644
--- a/arch/powerpc/include/asm/mpic.h
+++ b/arch/powerpc/include/asm/mpic.h
@@ -393,6 +393,9 @@ struct mpic
#define MPIC_REGSET_STANDARD MPIC_REGSET(0) /*
Original MPIC */
#define MPIC_REGSET_TSI108 MPIC_REGSET(1) /*
Tsi108/109 PIC */
+/* Get the version of primary MPIC */
+extern u32 mpic_primary_get_version(void);
+
/* Allocate the controller structure and setup the linux irq descs
* for the range if interrupts passed in. No HW initialization is
* actually performed.
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index d30e6a6..c893a4b 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -1165,10 +1165,27 @@ static struct irq_domain_ops mpic_host_ops = {
.xlate = mpic_host_xlate,
};
+static u32 mpic_get_version(struct mpic *mpic)
+{
+ u32 brr1;
+
+ brr1 = _mpic_read(mpic->reg_type, &mpic->thiscpuregs,
+ MPIC_FSL_BRR1);
+
+ return brr1 & MPIC_FSL_BRR1_VER;
+}
+
/*
* Exported functions
*/
+u32 mpic_primary_get_version(void)
+{
+ struct mpic *mpic = mpic_primary;
+
+ return mpic_get_version(mpic);
+}
So this just crashes if there is no mpic_primary or it's a non-FSL MPIC?
-Scott
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