From: Ed Swarthout Ed.Swarthout@freescale.com
QIXIS includes frequency measurement functions for each major processor clock input. After reset (and after clocks are stable), QIXIS measures the clocks against a reference frequency and stores the results in CLK_FREQ registers. A base register supplies a multiplier which allows directly obtaining the measured value, without requiring knowledge of the target system or QIXIS core frequency.
Signed-off-by: Ed Swarthout Ed.Swarthout@freescale.com Signed-off-by: York Sun yorksun@freescale.com --- board/freescale/common/qixis.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/board/freescale/common/qixis.h b/board/freescale/common/qixis.h index 8d914d5..2cf8738 100644 --- a/board/freescale/common/qixis.h +++ b/board/freescale/common/qixis.h @@ -78,7 +78,11 @@ struct qixis { u8 trig_stat; u8 res12[3]; u8 trig_ctr[4]; - u8 res13[48]; + u8 res13[16]; + u8 clk_freq[6]; /* Clock Measurement Registers */ + u8 res_c6[8]; + u8 clk_base[2]; /* Clock Frequency Base Reg */ + u8 res_d0[16]; u8 aux2[4]; /* Auxiliary Registers,0xE0 */ u8 res14[10]; u8 aux_ad;