1 /* SPDX-License-Identifier: GPL-2.0-only */
3  * i2sbus driver -- interface register definitions
61  *  - clock source
62  *  - MClk divisor
63  *  - SClk divisor
64  *  - SClk master flag
65  *  - serial format (sony, i2s 64x, i2s 32x, dav, silabs)
66  *  - external sample frequency interrupt (don't understand)
67  *  - external sample frequency
80 /* MClk is the clock that drives the codec, usually called its 'system clock'.
89 #	define I2S_SF_MCLKDIV_OTHER(div)	(((div/2-1)<<I2S_SF_MCLKDIV_SHIFT)&I2S_SF_MCLKDIV_MASK)  argument
90 static inline int i2s_sf_mclkdiv(int div, int *out)  in i2s_sf_mclkdiv()  argument
94 	switch(div) {  in i2s_sf_mclkdiv()
100 		if (div%2) return -1;  in i2s_sf_mclkdiv()
101 		d = div/2-1;  in i2s_sf_mclkdiv()
103 			return -1;  in i2s_sf_mclkdiv()
104 		*out |= I2S_SF_MCLKDIV_OTHER(div);  in i2s_sf_mclkdiv()
109  * derived from the MClk above by taking only every 'divisor' tick
110  * of MClk.
116 #	define I2S_SF_SCLKDIV_OTHER(div)	(((div/2-1)<<I2S_SF_SCLKDIV_SHIFT)&I2S_SF_SCLKDIV_MASK)  argument
117 static inline int i2s_sf_sclkdiv(int div, int *out)  in i2s_sf_sclkdiv()  argument
121 	switch(div) {  in i2s_sf_sclkdiv()
125 		if (div%2) return -1;  in i2s_sf_sclkdiv()
126 		d = div/2-1;  in i2s_sf_sclkdiv()
127 		if (d == 8 || d == 9) return -1;  in i2s_sf_sclkdiv()
128 		*out |= I2S_SF_SCLKDIV_OTHER(div);  in i2s_sf_sclkdiv()