1 /*-
36  * Calls to DELAY() are needed per Application Note AN-179 "TWSI Software
61 #include <dev/clk/clk.h>
99 	{ "marvell,mv64xxx-i2c",	true },
100 	{ "marvell,mv78230-i2c",	true },
138 	if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)  in mv_twsi_probe()
145 #define	ABSSUB(a,b)	(((a) > (b)) ? (a) - (b) : (b) - (a))
150 	uint64_t clk;  in mv_twsi_cal_baud_rate()  local
157 	clk_get_freq(sc->clk_core, &clk);  in mv_twsi_cal_baud_rate()
161 			cur = TWSI_BAUD_RATE_RAW(clk,m,n);  in mv_twsi_cal_baud_rate()
170 	rate->raw = TWSI_BAUD_RATE_RAW(clk, m0, n0);  in mv_twsi_cal_baud_rate()
171 	rate->param = TWSI_BAUD_RATE_PARAM(m0, n0);  in mv_twsi_cal_baud_rate()
172 	rate->m = m0;  in mv_twsi_cal_baud_rate()
173 	rate->n = n0;  in mv_twsi_cal_baud_rate()
183 	sc->dev = dev;  in mv_twsi_attach()
186 	error = clk_get_by_ofw_index(dev, 0, 0, &sc->clk_core);  in mv_twsi_attach()
191 	error = clk_enable(sc->clk_core);  in mv_twsi_attach()
197 	if (clk_get_by_ofw_index(dev, 0, 1, &sc->clk_reg) == 0) {  in mv_twsi_attach()
198 		error = clk_enable(sc->clk_reg);  in mv_twsi_attach()
205 	mv_twsi_cal_baud_rate(sc, TWSI_BAUD_RATE_SLOW, &sc->baud_rate[IIC_SLOW]);  in mv_twsi_attach()
206 	mv_twsi_cal_baud_rate(sc, TWSI_BAUD_RATE_FAST, &sc->baud_rate[IIC_FAST]);  in mv_twsi_attach()
210 		    " %" PRIu32 " kHz (M=%d, N=%d) for fast.\n",  in mv_twsi_attach()
211 		    sc->baud_rate[IIC_SLOW].raw / 1000,  in mv_twsi_attach()
212 		    sc->baud_rate[IIC_SLOW].m,  in mv_twsi_attach()
213 		    sc->baud_rate[IIC_SLOW].n,  in mv_twsi_attach()
214 		    sc->baud_rate[IIC_FAST].raw / 1000,  in mv_twsi_attach()
215 		    sc->baud_rate[IIC_FAST].m,  in mv_twsi_attach()
216 		    sc->baud_rate[IIC_FAST].n);  in mv_twsi_attach()
218 	sc->reg_data = TWSI_DATA;  in mv_twsi_attach()
219 	sc->reg_slave_addr = TWSI_ADDR;  in mv_twsi_attach()
220 	sc->reg_slave_ext_addr = TWSI_XADDR;  in mv_twsi_attach()
221 	sc->reg_control = TWSI_CNTR;  in mv_twsi_attach()
222 	sc->reg_status = TWSI_STAT;  in mv_twsi_attach()
223 	sc->reg_baud_rate = TWSI_BAUD_RATE;  in mv_twsi_attach()
224 	sc->reg_soft_reset = TWSI_SRST;  in mv_twsi_attach()