Add function qe_clock_source() which takes a string containing the name of a
QE clock source (as is typically found in device trees) and returns the
matching enum qe_clock value.
Signed-off-by: Timur Tabi <[EMAIL PROTECTED]>
---
This patch applies to Kumar's for-2.6.24 branch.
arch/powerpc/sysdev/qe_lib/qe.c | 65 +++++++++++++++++++++++++++++++++++++++
include/asm-powerpc/qe.h | 3 ++
2 files changed, 68 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c
index 3d57d38..da68534 100644
--- a/arch/powerpc/sysdev/qe_lib/qe.c
+++ b/arch/powerpc/sysdev/qe_lib/qe.c
@@ -199,6 +199,71 @@ void qe_setbrg(unsigned int brg, unsigned int rate,
unsigned int multiplier)
out_be32(&qe_immr->brg.brgc[brg - 1], tempval);
}
+/* Convert a string to a QE clock source enum
+ *
+ * This function takes a string, typically from a property in the device
+ * tree, and returns the corresponding "enum qe_clock" value.
+*/
+enum qe_clock qe_clock_source(const char *source)
+{
+ /* This structure is designed so that it's 8 bytes in size */
+ static struct {
+ const char name[6];
+ u16 num;
+ } __attribute__((packed)) sources[QE_CLK_DUMMY] =
+ {
+ {"none", QE_CLK_NONE},
+ {"brg1", QE_BRG1},
+ {"brg2", QE_BRG2},
+ {"brg3", QE_BRG3},
+ {"brg4", QE_BRG4},
+ {"brg5", QE_BRG5},
+ {"brg6", QE_BRG6},
+ {"brg7", QE_BRG7},
+ {"brg8", QE_BRG8},
+ {"brg9", QE_BRG9},
+ {"brg10", QE_BRG10},
+ {"brg11", QE_BRG11},
+ {"brg12", QE_BRG12},
+ {"brg13", QE_BRG13},
+ {"brg14", QE_BRG14},
+ {"brg15", QE_BRG15},
+ {"brg16", QE_BRG16},
+ {"clk1", QE_CLK1},
+ {"clk2", QE_CLK2},
+ {"clk3", QE_CLK3},
+ {"clk4", QE_CLK4},
+ {"clk5", QE_CLK5},
+ {"clk6", QE_CLK6},
+ {"clk7", QE_CLK7},
+ {"clk8", QE_CLK8},
+ {"clk9", QE_CLK9},
+ {"clk10", QE_CLK10},
+ {"clk11", QE_CLK11},
+ {"clk12", QE_CLK12},
+ {"clk13", QE_CLK13},
+ {"clk14", QE_CLK14},
+ {"clk15", QE_CLK15},
+ {"clk16", QE_CLK16},
+ {"clk17", QE_CLK17},
+ {"clk18", QE_CLK18},
+ {"clk19", QE_CLK19},
+ {"clk20", QE_CLK20},
+ {"clk21", QE_CLK21},
+ {"clk22", QE_CLK22},
+ {"clk23", QE_CLK23},
+ {"clk24", QE_CLK24}
+ };
+ unsigned int i;
+
+ for (i = 0; i < QE_CLK_DUMMY; i++)
+ if (strcasecmp(source, sources[i].name) == 0)
+ return (enum qe_clock) sources[i].num;
+
+ return QE_CLK_DUMMY;
+}
+EXPORT_SYMBOL(qe_clock_source);
+
/* Initialize SNUMs (thread serial numbers) according to
* QE Module Control chapter, SNUM table
*/
diff --git a/include/asm-powerpc/qe.h b/include/asm-powerpc/qe.h
index 0dabe46..d28bc85 100644
--- a/include/asm-powerpc/qe.h
+++ b/include/asm-powerpc/qe.h
@@ -175,6 +175,9 @@ enum qe_clock {
QE_CLK_DUMMY,
};
+/* Convert a string to a QE clock source enum */
+enum qe_clock qe_clock_source(const char *source);
+
/* QE CMXUCR Registers.
* There are two UCCs represented in each of the four CMXUCR registers.
* These values are for the UCC in the LSBs
--
1.5.2.4
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
