4  * SPDX-License-Identifier:	GPL-2.0+
11 #include <asm/arch/imx-regs.h>
33 	status = readl(&regs->msr);  in imx_lpci2c_check_busy_bus()
46 	status = readl(&regs->msr);  in imx_lpci2c_check_clear_error()
62 		writel(0x7f00, &regs->msr);  in imx_lpci2c_check_clear_error()
64 		val = readl(&regs->mcr);  in imx_lpci2c_check_clear_error()
66 		writel(val, &regs->mcr);  in imx_lpci2c_check_clear_error()
79 		txcount = LPI2C_MFSR_TXCOUNT(readl(&regs->mfsr));  in bus_i2c_wait_for_tx_ready()
80 		txcount = LPI2C_FIFO_SIZE - txcount;  in bus_i2c_wait_for_tx_ready()
88 			return -1;  in bus_i2c_wait_for_tx_ready()
103 	while (len--) {  in bus_i2c_send()
109 		writel(*txbuf++, &regs->mtdr);  in bus_i2c_send()
132 	writel(0x7f00, &regs->msr);  in bus_i2c_receive()
134 	val = LPI2C_MTDR_CMD(0x1) | LPI2C_MTDR_DATA(len - 1);  in bus_i2c_receive()
135 	writel(val, &regs->mtdr);  in bus_i2c_receive()
137 	while (len--) {  in bus_i2c_receive()
147 				return -1;  in bus_i2c_receive()
149 			val = readl(&regs->mrdr);  in bus_i2c_receive()
168 	writel(0x7f00, &regs->msr);  in bus_i2c_start()
169 	/* turn off auto-stop condition */  in bus_i2c_start()
170 	val = readl(&regs->mcfgr1) & ~LPI2C_MCFGR1_AUTOSTOP_MASK;  in bus_i2c_start()
171 	writel(val, &regs->mcfgr1);  in bus_i2c_start()
180 	writel(val, &regs->mtdr);  in bus_i2c_start()
197 	writel(LPI2C_MTDR_CMD(0x2), &regs->mtdr);  in bus_i2c_stop()
200 		status = readl(&regs->msr);  in bus_i2c_stop()
206 			writel(status, &regs->msr);  in bus_i2c_stop()
261 	clock_rate = imx_get_i2cclk(bus->seq + 4);  in bus_i2c_set_bus_speed()
263 		return -EPERM;  in bus_i2c_set_bus_speed()
265 	mode = (readl(&regs->mcr) & LPI2C_MCR_MEN_MASK) >> LPI2C_MCR_MEN_SHIFT;  in bus_i2c_set_bus_speed()
267 	val = readl(&regs->mcr) & ~LPI2C_MCR_MEN_MASK;  in bus_i2c_set_bus_speed()
268 	writel(val | LPI2C_MCR_MEN(0), &regs->mcr);  in bus_i2c_set_bus_speed()
278 			abs_error = speed > rate ? speed - rate : rate - speed;  in bus_i2c_set_bus_speed()
290 	/* Standard, fast, fast mode plus and ultra-fast transfers. */  in bus_i2c_set_bus_speed()
297 	writel(val, &regs->mccr0);  in bus_i2c_set_bus_speed()
306 	val = readl(&regs->mcfgr1) & ~LPI2C_MCFGR1_PRESCALE_MASK;  in bus_i2c_set_bus_speed()
307 	writel(val | LPI2C_MCFGR1_PRESCALE(best_pre), &regs->mcfgr1);  in bus_i2c_set_bus_speed()
310 		val = readl(&regs->mcr) & ~LPI2C_MCR_MEN_MASK;  in bus_i2c_set_bus_speed()
311 		writel(val | LPI2C_MCR_MEN(1), &regs->mcr);  in bus_i2c_set_bus_speed()
325 	writel(LPI2C_MCR_RST_MASK, &regs->mcr);  in bus_i2c_init()
326 	writel(0x0, &regs->mcr);  in bus_i2c_init()
328 	writel(LPI2C_MCR_DBGEN(0) | LPI2C_MCR_DOZEN(1), &regs->mcr);  in bus_i2c_init()
330 	val = readl(&regs->mcfgr0);  in bus_i2c_init()
334 	writel(val, &regs->mcfgr0);  in bus_i2c_init()
336 	val = readl(&regs->mcfgr1);  in bus_i2c_init()
340 	writel(val, &regs->mcfgr1);  in bus_i2c_init()
344 	/* enable lpi2c in master mode */  in bus_i2c_init()
345 	val = readl(&regs->mcr) & ~LPI2C_MCR_MEN_MASK;  in bus_i2c_init()
346 	writel(val | LPI2C_MCR_MEN(1), &regs->mcr);  in bus_i2c_init()
348 	debug("i2c : controller bus %d, speed %d:\n", bus->seq, speed);  in bus_i2c_init()
370 		return -result;  in imx_lpi2c_probe_chip()
382 	for (; nmsgs > 0; nmsgs--, msg++) {  in imx_lpi2c_xfer()
383 		debug("i2c_xfer: chip=0x%x, len=0x%x\n", msg->addr, msg->len);  in imx_lpi2c_xfer()
384 		if (msg->flags & I2C_M_RD)  in imx_lpi2c_xfer()
385 			ret = bus_i2c_read(regs, msg->addr, msg->buf, msg->len);  in imx_lpi2c_xfer()
387 			ret = bus_i2c_write(regs, msg->addr, msg->buf,  in imx_lpi2c_xfer()
388 					    msg->len);  in imx_lpi2c_xfer()
411 	i2c_bus->driver_data = dev_get_driver_data(bus);  in imx_lpi2c_probe()
415 		return -EINVAL;  in imx_lpi2c_probe()
417 	i2c_bus->base = addr;  in imx_lpi2c_probe()
418 	i2c_bus->index = bus->seq;  in imx_lpi2c_probe()
419 	i2c_bus->bus = bus;  in imx_lpi2c_probe()
422 	ret = init_i2c_power(bus->seq + 4);  in imx_lpi2c_probe()
428 	/* Enable clk, only i2c4-7 can be handled by A7 core */  in imx_lpi2c_probe()
429 	ret = enable_i2c_clk(1, bus->seq + 4);  in imx_lpi2c_probe()
438 	      bus->seq, i2c_bus->base,  in imx_lpi2c_probe()
439 	      i2c_bus->speed);  in imx_lpi2c_probe()
451 	{ .compatible = "fsl,imx7ulp-lpi2c", },