45 #define ICMPR	0x2C	/* SCL mask control */
46 #define ICHPR	0x30	/* SCL HIGH control */
47 #define ICLPR	0x34	/* SCL LOW control */
59 #define FSCL	BIT(6)	/* override SCL pin */
95 #define SME	BIT(0)	/* SCL Mask Enable */
98 #define TCYC17	0x0f		/* 17*Tcyc delay 1st bit between SDA and SCL */
102 /* SCL low/high ratio 5:4 to meet all I2C timing specs (incl safety margin) */
288 	u32 cdf, round, ick, sum, scl, cdf_width;  in rcar_i2c_clock_calculate()  local
303 	 * calculate SCL clock  in rcar_i2c_clock_calculate()
308 	 * SCL	= ick / (20 + SCGD * 8 + F[(ticf + tr + intd) * ick])  in rcar_i2c_clock_calculate()
311 	 * SCL	= clkp / (8 + SMD * 2 + SCLD + SCHD +F[(ticf + tr + intd) * clkp])  in rcar_i2c_clock_calculate()
314 	 * ticf : I2C SCL falling time  in rcar_i2c_clock_calculate()
315 	 * tr   : I2C SCL rising  time  in rcar_i2c_clock_calculate()
331 	/* On Gen3+, we use cdf only for the filters, not as a SCL divider */  in rcar_i2c_clock_calculate()
348 		 * SCL	= ick / (20 + 8 * SCGD + F[(ticf + tr + intd) * ick])  in rcar_i2c_clock_calculate()
349 		 * 20 + 8 * SCGD + F[...] = ick / SCL  in rcar_i2c_clock_calculate()
350 		 * SCGD = ((ick / SCL) - 20 - F[...]) / 8  in rcar_i2c_clock_calculate()
351 		 * Result (= SCL) should be less than bus_speed for hardware safety  in rcar_i2c_clock_calculate()
355 		scl = ick / (20 + 8 * scgd + round);  in rcar_i2c_clock_calculate()
361 			scl, t.bus_freq_hz, rate, round, cdf, scgd);  in rcar_i2c_clock_calculate()
371 		 * SCL = clkp / (8 + 2 * SMD + SCLD + SCHD + F[(ticf + tr + intd) * clkp])  in rcar_i2c_clock_calculate()
372 		 * SCL = clkp / (8 + 2 * SMD + RCAR_SCLD_RATIO * x  in rcar_i2c_clock_calculate()
377 		 * SCL = clkp / (8 + 2 * smd + sum_ratio * x + F[...])  in rcar_i2c_clock_calculate()
378 		 * 8 + 2 * smd + sum_ratio * x + F[...] = clkp / SCL  in rcar_i2c_clock_calculate()
379 		 * x = ((clkp / SCL) - 8 - 2 * smd - F[...]) / sum_ratio  in rcar_i2c_clock_calculate()
383 		scl = rate / (8 + 2 * priv->smd + sum_ratio * x + round);  in rcar_i2c_clock_calculate()
395 			scl, t.bus_freq_hz, rate, round, cdf, priv->schd, priv->scld, priv->smd);  in rcar_i2c_clock_calculate()
401 	dev_err(dev, "it is impossible to calculate best SCL\n");  in rcar_i2c_clock_calculate()