1Clock framework on SuperH architecture
2
3The framework on SH extends existing API by the function clk_set_rate_ex,
4which prototype is as follows:
5
6    clk_set_rate_ex (struct clk *clk, unsigned long rate, int algo_id)
7
8The algo_id parameter is used to specify algorithm used to recalculate clocks,
9adjanced to clock, specified as first argument. It is assumed that algo_id==0
10means no changes to adjanced clock
11
12Internally, the clk_set_rate_ex forwards request to clk->ops->set_rate method,
13if it is present in ops structure. The method should set the clock rate and adjust
14all needed clocks according to the passed algo_id.
15Exact values for algo_id are machine-dependend. For the sh7722, the following
16values are defined:
17
18	NO_CHANGE	= 0,
19	IUS_N1_N1,	/* I:U = N:1, U:Sh = N:1 */
20	IUS_322,	/* I:U:Sh = 3:2:2	 */
21	IUS_522,	/* I:U:Sh = 5:2:2 	 */
22	IUS_N11,	/* I:U:Sh = N:1:1	 */
23	SB_N1,		/* Sh:B = N:1		 */
24	SB3_N1,		/* Sh:B3 = N:1		 */
25	SB3_32,		/* Sh:B3 = 3:2		 */
26	SB3_43,		/* Sh:B3 = 4:3		 */
27	SB3_54,		/* Sh:B3 = 5:4		 */
28	BP_N1,		/* B:P	 = N:1		 */
29	IP_N1		/* I:P	 = N:1		 */
30
31Each of these constants means relation between clocks that can be set via the FRQCR
32register
33