samsung: i2c: Split the high-speed I2C code into a new driver

Now that driver model is used for I2C on all boards, we can split the
high-speed code into its own driver. There is virtually no common code,
and this significantly reduces confusion.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>

drivers/i2c/Makefile

@@ -34,7 +34,7 @@ obj-$(CONFIG_SYS_I2C_OMAP34XX) += omap24xx_i2c.o
 obj-$(CONFIG_SYS_I2C_PPC4XX) += ppc4xx_i2c.o
 obj-$(CONFIG_SYS_I2C_RCAR) += rcar_i2c.o
 obj-$(CONFIG_SYS_I2C_ROCKCHIP) += rk_i2c.o
-obj-$(CONFIG_SYS_I2C_S3C24X0) += s3c24x0_i2c.o
+obj-$(CONFIG_SYS_I2C_S3C24X0) += s3c24x0_i2c.o exynos_hs_i2c.o
 obj-$(CONFIG_SYS_I2C_SANDBOX) += sandbox_i2c.o i2c-emul-uclass.o
 obj-$(CONFIG_SYS_I2C_SH) += sh_i2c.o
 obj-$(CONFIG_SYS_I2C_SOFT) += soft_i2c.o

drivers/i2c/exynos_hs_i2c.c

@@ -0,0 +1,561 @@
+/*
+ * Copyright (c) 2016, Google Inc
+ *
+ * (C) Copyright 2002
+ * David Mueller, ELSOFT AG, d.mueller@elsoft.ch
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <i2c.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/pinmux.h>
+#include "s3c24x0_i2c.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* HSI2C-specific register description */
+
+/* I2C_CTL Register bits */
+#define HSI2C_FUNC_MODE_I2C		(1u << 0)
+#define HSI2C_MASTER			(1u << 3)
+#define HSI2C_RXCHON			(1u << 6)	/* Write/Send */
+#define HSI2C_TXCHON			(1u << 7)	/* Read/Receive */
+#define HSI2C_SW_RST			(1u << 31)
+
+/* I2C_FIFO_CTL Register bits */
+#define HSI2C_RXFIFO_EN			(1u << 0)
+#define HSI2C_TXFIFO_EN			(1u << 1)
+#define HSI2C_TXFIFO_TRIGGER_LEVEL	(0x20 << 16)
+#define HSI2C_RXFIFO_TRIGGER_LEVEL	(0x20 << 4)
+
+/* I2C_TRAILING_CTL Register bits */
+#define HSI2C_TRAILING_COUNT		(0xff)
+
+/* I2C_INT_EN Register bits */
+#define HSI2C_TX_UNDERRUN_EN		(1u << 2)
+#define HSI2C_TX_OVERRUN_EN		(1u << 3)
+#define HSI2C_RX_UNDERRUN_EN		(1u << 4)
+#define HSI2C_RX_OVERRUN_EN		(1u << 5)
+#define HSI2C_INT_TRAILING_EN		(1u << 6)
+#define HSI2C_INT_I2C_EN		(1u << 9)
+
+#define HSI2C_INT_ERROR_MASK	(HSI2C_TX_UNDERRUN_EN |\
+				 HSI2C_TX_OVERRUN_EN  |\
+				 HSI2C_RX_UNDERRUN_EN |\
+				 HSI2C_RX_OVERRUN_EN  |\
+				 HSI2C_INT_TRAILING_EN)
+
+/* I2C_CONF Register bits */
+#define HSI2C_AUTO_MODE			(1u << 31)
+#define HSI2C_10BIT_ADDR_MODE		(1u << 30)
+#define HSI2C_HS_MODE			(1u << 29)
+
+/* I2C_AUTO_CONF Register bits */
+#define HSI2C_READ_WRITE		(1u << 16)
+#define HSI2C_STOP_AFTER_TRANS		(1u << 17)
+#define HSI2C_MASTER_RUN		(1u << 31)
+
+/* I2C_TIMEOUT Register bits */
+#define HSI2C_TIMEOUT_EN		(1u << 31)
+
+/* I2C_TRANS_STATUS register bits */
+#define HSI2C_MASTER_BUSY		(1u << 17)
+#define HSI2C_SLAVE_BUSY		(1u << 16)
+#define HSI2C_TIMEOUT_AUTO		(1u << 4)
+#define HSI2C_NO_DEV			(1u << 3)
+#define HSI2C_NO_DEV_ACK		(1u << 2)
+#define HSI2C_TRANS_ABORT		(1u << 1)
+#define HSI2C_TRANS_SUCCESS		(1u << 0)
+#define HSI2C_TRANS_ERROR_MASK	(HSI2C_TIMEOUT_AUTO |\
+				 HSI2C_NO_DEV | HSI2C_NO_DEV_ACK |\
+				 HSI2C_TRANS_ABORT)
+#define HSI2C_TRANS_FINISHED_MASK (HSI2C_TRANS_ERROR_MASK | HSI2C_TRANS_SUCCESS)
+
+
+/* I2C_FIFO_STAT Register bits */
+#define HSI2C_RX_FIFO_EMPTY		(1u << 24)
+#define HSI2C_RX_FIFO_FULL		(1u << 23)
+#define HSI2C_TX_FIFO_EMPTY		(1u << 8)
+#define HSI2C_TX_FIFO_FULL		(1u << 7)
+#define HSI2C_RX_FIFO_LEVEL(x)		(((x) >> 16) & 0x7f)
+#define HSI2C_TX_FIFO_LEVEL(x)		((x) & 0x7f)
+
+#define HSI2C_SLV_ADDR_MAS(x)		((x & 0x3ff) << 10)
+
+#define HSI2C_TIMEOUT_US 10000 /* 10 ms, finer granularity */
+
+/*
+ * Wait for transfer completion.
+ *
+ * This function reads the interrupt status register waiting for the INT_I2C
+ * bit to be set, which indicates copletion of a transaction.
+ *
+ * @param i2c: pointer to the appropriate register bank
+ *
+ * @return: I2C_OK in case of successful completion, I2C_NOK_TIMEOUT in case
+ *          the status bits do not get set in time, or an approrpiate error
+ *          value in case of transfer errors.
+ */
+static int hsi2c_wait_for_trx(struct exynos5_hsi2c *i2c)
+{
+	int i = HSI2C_TIMEOUT_US;
+
+	while (i-- > 0) {
+		u32 int_status = readl(&i2c->usi_int_stat);
+
+		if (int_status & HSI2C_INT_I2C_EN) {
+			u32 trans_status = readl(&i2c->usi_trans_status);
+
+			/* Deassert pending interrupt. */
+			writel(int_status, &i2c->usi_int_stat);
+
+			if (trans_status & HSI2C_NO_DEV_ACK) {
+				debug("%s: no ACK from device\n", __func__);
+				return I2C_NACK;
+			}
+			if (trans_status & HSI2C_NO_DEV) {
+				debug("%s: no device\n", __func__);
+				return I2C_NOK;
+			}
+			if (trans_status & HSI2C_TRANS_ABORT) {
+				debug("%s: arbitration lost\n", __func__);
+				return I2C_NOK_LA;
+			}
+			if (trans_status & HSI2C_TIMEOUT_AUTO) {
+				debug("%s: device timed out\n", __func__);
+				return I2C_NOK_TOUT;
+			}
+			return I2C_OK;
+		}
+		udelay(1);
+	}
+	debug("%s: transaction timeout!\n", __func__);
+	return I2C_NOK_TOUT;
+}
+
+static int hsi2c_get_clk_details(struct s3c24x0_i2c_bus *i2c_bus)
+{
+	struct exynos5_hsi2c *hsregs = i2c_bus->hsregs;
+	ulong clkin;
+	unsigned int op_clk = i2c_bus->clock_frequency;
+	unsigned int i = 0, utemp0 = 0, utemp1 = 0;
+	unsigned int t_ftl_cycle;
+
+#if (defined CONFIG_EXYNOS4 || defined CONFIG_EXYNOS5)
+	clkin = get_i2c_clk();
+#else
+	clkin = get_PCLK();
+#endif
+	/* FPCLK / FI2C =
+	 * (CLK_DIV + 1) * (TSCLK_L + TSCLK_H + 2) + 8 + 2 * FLT_CYCLE
+	 * uTemp0 = (CLK_DIV + 1) * (TSCLK_L + TSCLK_H + 2)
+	 * uTemp1 = (TSCLK_L + TSCLK_H + 2)
+	 * uTemp2 = TSCLK_L + TSCLK_H
+	 */
+	t_ftl_cycle = (readl(&hsregs->usi_conf) >> 16) & 0x7;
+	utemp0 = (clkin / op_clk) - 8 - 2 * t_ftl_cycle;
+
+	/* CLK_DIV max is 256 */
+	for (i = 0; i < 256; i++) {
+		utemp1 = utemp0 / (i + 1);
+		if ((utemp1 < 512) && (utemp1 > 4)) {
+			i2c_bus->clk_cycle = utemp1 - 2;
+			i2c_bus->clk_div = i;
+			return 0;
+		}
+	}
+	return -EINVAL;
+}
+
+static void hsi2c_ch_init(struct s3c24x0_i2c_bus *i2c_bus)
+{
+	struct exynos5_hsi2c *hsregs = i2c_bus->hsregs;
+	unsigned int t_sr_release;
+	unsigned int n_clkdiv;
+	unsigned int t_start_su, t_start_hd;
+	unsigned int t_stop_su;
+	unsigned int t_data_su, t_data_hd;
+	unsigned int t_scl_l, t_scl_h;
+	u32 i2c_timing_s1;
+	u32 i2c_timing_s2;
+	u32 i2c_timing_s3;
+	u32 i2c_timing_sla;
+
+	n_clkdiv = i2c_bus->clk_div;
+	t_scl_l = i2c_bus->clk_cycle / 2;
+	t_scl_h = i2c_bus->clk_cycle / 2;
+	t_start_su = t_scl_l;
+	t_start_hd = t_scl_l;
+	t_stop_su = t_scl_l;
+	t_data_su = t_scl_l / 2;
+	t_data_hd = t_scl_l / 2;
+	t_sr_release = i2c_bus->clk_cycle;
+
+	i2c_timing_s1 = t_start_su << 24 | t_start_hd << 16 | t_stop_su << 8;
+	i2c_timing_s2 = t_data_su << 24 | t_scl_l << 8 | t_scl_h << 0;
+	i2c_timing_s3 = n_clkdiv << 16 | t_sr_release << 0;
+	i2c_timing_sla = t_data_hd << 0;
+
+	writel(HSI2C_TRAILING_COUNT, &hsregs->usi_trailing_ctl);
+
+	/* Clear to enable Timeout */
+	clrsetbits_le32(&hsregs->usi_timeout, HSI2C_TIMEOUT_EN, 0);
+
+	/* set AUTO mode */
+	writel(readl(&hsregs->usi_conf) | HSI2C_AUTO_MODE, &hsregs->usi_conf);
+
+	/* Enable completion conditions' reporting. */
+	writel(HSI2C_INT_I2C_EN, &hsregs->usi_int_en);
+
+	/* Enable FIFOs */
+	writel(HSI2C_RXFIFO_EN | HSI2C_TXFIFO_EN, &hsregs->usi_fifo_ctl);
+
+	/* Currently operating in Fast speed mode. */
+	writel(i2c_timing_s1, &hsregs->usi_timing_fs1);
+	writel(i2c_timing_s2, &hsregs->usi_timing_fs2);
+	writel(i2c_timing_s3, &hsregs->usi_timing_fs3);
+	writel(i2c_timing_sla, &hsregs->usi_timing_sla);
+}
+
+/* SW reset for the high speed bus */
+static void exynos5_i2c_reset(struct s3c24x0_i2c_bus *i2c_bus)
+{
+	struct exynos5_hsi2c *i2c = i2c_bus->hsregs;
+	u32 i2c_ctl;
+
+	/* Set and clear the bit for reset */
+	i2c_ctl = readl(&i2c->usi_ctl);
+	i2c_ctl |= HSI2C_SW_RST;
+	writel(i2c_ctl, &i2c->usi_ctl);
+
+	i2c_ctl = readl(&i2c->usi_ctl);
+	i2c_ctl &= ~HSI2C_SW_RST;
+	writel(i2c_ctl, &i2c->usi_ctl);
+
+	/* Initialize the configure registers */
+	hsi2c_ch_init(i2c_bus);
+}
+
+/*
+ * Poll the appropriate bit of the fifo status register until the interface is
+ * ready to process the next byte or timeout expires.
+ *
+ * In addition to the FIFO status register this function also polls the
+ * interrupt status register to be able to detect unexpected transaction
+ * completion.
+ *
+ * When FIFO is ready to process the next byte, this function returns I2C_OK.
+ * If in course of polling the INT_I2C assertion is detected, the function
+ * returns I2C_NOK. If timeout happens before any of the above conditions is
+ * met - the function returns I2C_NOK_TOUT;
+
+ * @param i2c: pointer to the appropriate i2c register bank.
+ * @param rx_transfer: set to True if the receive transaction is in progress.
+ * @return: as described above.
+ */
+static unsigned hsi2c_poll_fifo(struct exynos5_hsi2c *i2c, bool rx_transfer)
+{
+	u32 fifo_bit = rx_transfer ? HSI2C_RX_FIFO_EMPTY : HSI2C_TX_FIFO_FULL;
+	int i = HSI2C_TIMEOUT_US;
+
+	while (readl(&i2c->usi_fifo_stat) & fifo_bit) {
+		if (readl(&i2c->usi_int_stat) & HSI2C_INT_I2C_EN) {
+			/*
+			 * There is a chance that assertion of
+			 * HSI2C_INT_I2C_EN and deassertion of
+			 * HSI2C_RX_FIFO_EMPTY happen simultaneously. Let's
+			 * give FIFO status priority and check it one more
+			 * time before reporting interrupt. The interrupt will
+			 * be reported next time this function is called.
+			 */
+			if (rx_transfer &&
+			    !(readl(&i2c->usi_fifo_stat) & fifo_bit))
+				break;
+			return I2C_NOK;
+		}
+		if (!i--) {
+			debug("%s: FIFO polling timeout!\n", __func__);
+			return I2C_NOK_TOUT;
+		}
+		udelay(1);
+	}
+	return I2C_OK;
+}
+
+/*
+ * Preapre hsi2c transaction, either read or write.
+ *
+ * Set up transfer as described in section 27.5.1.2 'I2C Channel Auto Mode' of
+ * the 5420 UM.
+ *
+ * @param i2c: pointer to the appropriate i2c register bank.
+ * @param chip: slave address on the i2c bus (with read/write bit exlcuded)
+ * @param len: number of bytes expected to be sent or received
+ * @param rx_transfer: set to true for receive transactions
+ * @param: issue_stop: set to true if i2c stop condition should be generated
+ *         after this transaction.
+ * @return: I2C_NOK_TOUT in case the bus remained busy for HSI2C_TIMEOUT_US,
+ *          I2C_OK otherwise.
+ */
+static int hsi2c_prepare_transaction(struct exynos5_hsi2c *i2c,
+				     u8 chip,
+				     u16 len,
+				     bool rx_transfer,
+				     bool issue_stop)
+{
+	u32 conf;
+
+	conf = len | HSI2C_MASTER_RUN;
+
+	if (issue_stop)
+		conf |= HSI2C_STOP_AFTER_TRANS;
+
+	/* Clear to enable Timeout */
+	writel(readl(&i2c->usi_timeout) & ~HSI2C_TIMEOUT_EN, &i2c->usi_timeout);
+
+	/* Set slave address */
+	writel(HSI2C_SLV_ADDR_MAS(chip), &i2c->i2c_addr);
+
+	if (rx_transfer) {
+		/* i2c master, read transaction */
+		writel((HSI2C_RXCHON | HSI2C_FUNC_MODE_I2C | HSI2C_MASTER),
+		       &i2c->usi_ctl);
+
+		/* read up to len bytes, stop after transaction is finished */
+		writel(conf | HSI2C_READ_WRITE, &i2c->usi_auto_conf);
+	} else {
+		/* i2c master, write transaction */
+		writel((HSI2C_TXCHON | HSI2C_FUNC_MODE_I2C | HSI2C_MASTER),
+		       &i2c->usi_ctl);
+
+		/* write up to len bytes, stop after transaction is finished */
+		writel(conf, &i2c->usi_auto_conf);
+	}
+
+	/* Reset all pending interrupt status bits we care about, if any */
+	writel(HSI2C_INT_I2C_EN, &i2c->usi_int_stat);
+
+	return I2C_OK;
+}
+
+/*
+ * Wait while i2c bus is settling down (mostly stop gets completed).
+ */
+static int hsi2c_wait_while_busy(struct exynos5_hsi2c *i2c)
+{
+	int i = HSI2C_TIMEOUT_US;
+
+	while (readl(&i2c->usi_trans_status) & HSI2C_MASTER_BUSY) {
+		if (!i--) {
+			debug("%s: bus busy\n", __func__);
+			return I2C_NOK_TOUT;
+		}
+		udelay(1);
+	}
+	return I2C_OK;
+}
+
+static int hsi2c_write(struct exynos5_hsi2c *i2c,
+		       unsigned char chip,
+		       unsigned char addr[],
+		       unsigned char alen,
+		       unsigned char data[],
+		       unsigned short len,
+		       bool issue_stop)
+{
+	int i, rv = 0;
+
+	if (!(len + alen)) {
+		/* Writes of zero length not supported in auto mode. */
+		debug("%s: zero length writes not supported\n", __func__);
+		return I2C_NOK;
+	}
+
+	rv = hsi2c_prepare_transaction
+		(i2c, chip, len + alen, false, issue_stop);
+	if (rv != I2C_OK)
+		return rv;
+
+	/* Move address, if any, and the data, if any, into the FIFO. */
+	for (i = 0; i < alen; i++) {
+		rv = hsi2c_poll_fifo(i2c, false);
+		if (rv != I2C_OK) {
+			debug("%s: address write failed\n", __func__);
+			goto write_error;
+		}
+		writel(addr[i], &i2c->usi_txdata);
+	}
+
+	for (i = 0; i < len; i++) {
+		rv = hsi2c_poll_fifo(i2c, false);
+		if (rv != I2C_OK) {
+			debug("%s: data write failed\n", __func__);
+			goto write_error;
+		}
+		writel(data[i], &i2c->usi_txdata);
+	}
+
+	rv = hsi2c_wait_for_trx(i2c);
+
+ write_error:
+	if (issue_stop) {
+		int tmp_ret = hsi2c_wait_while_busy(i2c);
+		if (rv == I2C_OK)
+			rv = tmp_ret;
+	}
+
+	writel(HSI2C_FUNC_MODE_I2C, &i2c->usi_ctl); /* done */
+	return rv;
+}
+
+static int hsi2c_read(struct exynos5_hsi2c *i2c,
+		      unsigned char chip,
+		      unsigned char addr[],
+		      unsigned char alen,
+		      unsigned char data[],
+		      unsigned short len)
+{
+	int i, rv, tmp_ret;
+	bool drop_data = false;
+
+	if (!len) {
+		/* Reads of zero length not supported in auto mode. */
+		debug("%s: zero length read adjusted\n", __func__);
+		drop_data = true;
+		len = 1;
+	}
+
+	if (alen) {
+		/* Internal register adress needs to be written first. */
+		rv = hsi2c_write(i2c, chip, addr, alen, NULL, 0, false);
+		if (rv != I2C_OK)
+			return rv;
+	}
+
+	rv = hsi2c_prepare_transaction(i2c, chip, len, true, true);
+
+	if (rv != I2C_OK)
+		return rv;
+
+	for (i = 0; i < len; i++) {
+		rv = hsi2c_poll_fifo(i2c, true);
+		if (rv != I2C_OK)
+			goto read_err;
+		if (drop_data)
+			continue;
+		data[i] = readl(&i2c->usi_rxdata);
+	}
+
+	rv = hsi2c_wait_for_trx(i2c);
+
+ read_err:
+	tmp_ret = hsi2c_wait_while_busy(i2c);
+	if (rv == I2C_OK)
+		rv = tmp_ret;
+
+	writel(HSI2C_FUNC_MODE_I2C, &i2c->usi_ctl); /* done */
+	return rv;
+}
+
+static int exynos_hs_i2c_xfer(struct udevice *dev, struct i2c_msg *msg,
+			      int nmsgs)
+{
+	struct s3c24x0_i2c_bus *i2c_bus = dev_get_priv(dev);
+	struct exynos5_hsi2c *hsregs = i2c_bus->hsregs;
+	int ret;
+
+	for (; nmsgs > 0; nmsgs--, msg++) {
+		if (msg->flags & I2C_M_RD) {
+			ret = hsi2c_read(hsregs, msg->addr, 0, 0, msg->buf,
+					 msg->len);
+		} else {
+			ret = hsi2c_write(hsregs, msg->addr, 0, 0, msg->buf,
+					  msg->len, true);
+		}
+		if (ret) {
+			exynos5_i2c_reset(i2c_bus);
+			return -EREMOTEIO;
+		}
+	}
+
+	return 0;
+}
+
+static int s3c24x0_i2c_set_bus_speed(struct udevice *dev, unsigned int speed)
+{
+	struct s3c24x0_i2c_bus *i2c_bus = dev_get_priv(dev);
+
+	i2c_bus->clock_frequency = speed;
+
+	if (hsi2c_get_clk_details(i2c_bus))
+		return -EFAULT;
+	hsi2c_ch_init(i2c_bus);
+
+	return 0;
+}
+
+static int s3c24x0_i2c_probe(struct udevice *dev, uint chip, uint chip_flags)
+{
+	struct s3c24x0_i2c_bus *i2c_bus = dev_get_priv(dev);
+	uchar buf[1];
+	int ret;
+
+	buf[0] = 0;
+
+	/*
+	 * What is needed is to send the chip address and verify that the
+	 * address was <ACK>ed (i.e. there was a chip at that address which
+	 * drove the data line low).
+	 */
+	ret = hsi2c_read(i2c_bus->hsregs, chip, 0, 0, buf, 1);
+
+	return ret != I2C_OK;
+}
+
+static int s3c_i2c_ofdata_to_platdata(struct udevice *dev)
+{
+	const void *blob = gd->fdt_blob;
+	struct s3c24x0_i2c_bus *i2c_bus = dev_get_priv(dev);
+	int node;
+
+	node = dev->of_offset;
+
+	i2c_bus->hsregs = (struct exynos5_hsi2c *)dev_get_addr(dev);
+
+	i2c_bus->id = pinmux_decode_periph_id(blob, node);
+
+	i2c_bus->clock_frequency = fdtdec_get_int(blob, node,
+						  "clock-frequency", 100000);
+	i2c_bus->node = node;
+	i2c_bus->bus_num = dev->seq;
+
+	exynos_pinmux_config(i2c_bus->id, PINMUX_FLAG_HS_MODE);
+
+	i2c_bus->active = true;
+
+	return 0;
+}
+
+static const struct dm_i2c_ops exynos_hs_i2c_ops = {
+	.xfer		= exynos_hs_i2c_xfer,
+	.probe_chip	= s3c24x0_i2c_probe,
+	.set_bus_speed	= s3c24x0_i2c_set_bus_speed,
+};
+
+static const struct udevice_id exynos_hs_i2c_ids[] = {
+	{ .compatible = "samsung,exynos5-hsi2c" },
+	{ }
+};
+
+U_BOOT_DRIVER(hs_i2c) = {
+	.name	= "i2c_s3c_hs",
+	.id	= UCLASS_I2C,
+	.of_match = exynos_hs_i2c_ids,
+	.ofdata_to_platdata = s3c_i2c_ofdata_to_platdata,
+	.priv_auto_alloc_size = sizeof(struct s3c24x0_i2c_bus),
+	.ops	= &exynos_hs_i2c_ops,
+};

drivers/i2c/s3c24x0_i2c.c

@@ -24,105 +24,8 @@
 #include <i2c.h>
 #include "s3c24x0_i2c.h"
 
-#define	I2C_WRITE	0
-#define I2C_READ	1
-
-#define I2C_OK		0
-#define I2C_NOK		1
-#define I2C_NACK	2
-#define I2C_NOK_LA	3	/* Lost arbitration */
-#define I2C_NOK_TOUT	4	/* time out */
-
-/* HSI2C specific register description */
-
-/* I2C_CTL Register bits */
-#define HSI2C_FUNC_MODE_I2C		(1u << 0)
-#define HSI2C_MASTER			(1u << 3)
-#define HSI2C_RXCHON			(1u << 6)	/* Write/Send */
-#define HSI2C_TXCHON			(1u << 7)	/* Read/Receive */
-#define HSI2C_SW_RST			(1u << 31)
-
-/* I2C_FIFO_CTL Register bits */
-#define HSI2C_RXFIFO_EN			(1u << 0)
-#define HSI2C_TXFIFO_EN			(1u << 1)
-#define HSI2C_TXFIFO_TRIGGER_LEVEL	(0x20 << 16)
-#define HSI2C_RXFIFO_TRIGGER_LEVEL	(0x20 << 4)
-
-/* I2C_TRAILING_CTL Register bits */
-#define HSI2C_TRAILING_COUNT		(0xff)
-
-/* I2C_INT_EN Register bits */
-#define HSI2C_TX_UNDERRUN_EN		(1u << 2)
-#define HSI2C_TX_OVERRUN_EN		(1u << 3)
-#define HSI2C_RX_UNDERRUN_EN		(1u << 4)
-#define HSI2C_RX_OVERRUN_EN		(1u << 5)
-#define HSI2C_INT_TRAILING_EN		(1u << 6)
-#define HSI2C_INT_I2C_EN		(1u << 9)
-
-#define HSI2C_INT_ERROR_MASK	(HSI2C_TX_UNDERRUN_EN |\
-				 HSI2C_TX_OVERRUN_EN  |\
-				 HSI2C_RX_UNDERRUN_EN |\
-				 HSI2C_RX_OVERRUN_EN  |\
-				 HSI2C_INT_TRAILING_EN)
-
-/* I2C_CONF Register bits */
-#define HSI2C_AUTO_MODE			(1u << 31)
-#define HSI2C_10BIT_ADDR_MODE		(1u << 30)
-#define HSI2C_HS_MODE			(1u << 29)
-
-/* I2C_AUTO_CONF Register bits */
-#define HSI2C_READ_WRITE		(1u << 16)
-#define HSI2C_STOP_AFTER_TRANS		(1u << 17)
-#define HSI2C_MASTER_RUN		(1u << 31)
-
-/* I2C_TIMEOUT Register bits */
-#define HSI2C_TIMEOUT_EN		(1u << 31)
-
-/* I2C_TRANS_STATUS register bits */
-#define HSI2C_MASTER_BUSY		(1u << 17)
-#define HSI2C_SLAVE_BUSY		(1u << 16)
-#define HSI2C_TIMEOUT_AUTO		(1u << 4)
-#define HSI2C_NO_DEV			(1u << 3)
-#define HSI2C_NO_DEV_ACK		(1u << 2)
-#define HSI2C_TRANS_ABORT		(1u << 1)
-#define HSI2C_TRANS_SUCCESS		(1u << 0)
-#define HSI2C_TRANS_ERROR_MASK	(HSI2C_TIMEOUT_AUTO |\
-				 HSI2C_NO_DEV | HSI2C_NO_DEV_ACK |\
-				 HSI2C_TRANS_ABORT)
-#define HSI2C_TRANS_FINISHED_MASK (HSI2C_TRANS_ERROR_MASK | HSI2C_TRANS_SUCCESS)
-
-
-/* I2C_FIFO_STAT Register bits */
-#define HSI2C_RX_FIFO_EMPTY		(1u << 24)
-#define HSI2C_RX_FIFO_FULL		(1u << 23)
-#define HSI2C_TX_FIFO_EMPTY		(1u << 8)
-#define HSI2C_TX_FIFO_FULL		(1u << 7)
-#define HSI2C_RX_FIFO_LEVEL(x)		(((x) >> 16) & 0x7f)
-#define HSI2C_TX_FIFO_LEVEL(x)		((x) & 0x7f)
-
-#define HSI2C_SLV_ADDR_MAS(x)		((x & 0x3ff) << 10)
-
-/* S3C I2C Controller bits */
-#define I2CSTAT_BSY	0x20	/* Busy bit */
-#define I2CSTAT_NACK	0x01	/* Nack bit */
-#define I2CCON_ACKGEN	0x80	/* Acknowledge generation */
-#define I2CCON_IRPND	0x10	/* Interrupt pending bit */
-#define I2C_MODE_MT	0xC0	/* Master Transmit Mode */
-#define I2C_MODE_MR	0x80	/* Master Receive Mode */
-#define I2C_START_STOP	0x20	/* START / STOP */
-#define I2C_TXRX_ENA	0x10	/* I2C Tx/Rx enable */
-
-#define I2C_TIMEOUT_MS 10		/* 10 ms */
-
-#define	HSI2C_TIMEOUT_US 10000 /* 10 ms, finer granularity */
-
 DECLARE_GLOBAL_DATA_PTR;
 
-enum exynos_i2c_type {
-	EXYNOS_I2C_STD,
-	EXYNOS_I2C_HS,
-};
-
 /*
  * Wait til the byte transfer is completed.
  *
@@ -145,55 +48,6 @@ static int WaitForXfer(struct s3c24x0_i2c *i2c)
 	return I2C_NOK_TOUT;
 }
 
-/*
- * Wait for transfer completion.
- *
- * This function reads the interrupt status register waiting for the INT_I2C
- * bit to be set, which indicates copletion of a transaction.
- *
- * @param i2c: pointer to the appropriate register bank
- *
- * @return: I2C_OK in case of successful completion, I2C_NOK_TIMEOUT in case
- *          the status bits do not get set in time, or an approrpiate error
- *          value in case of transfer errors.
- */
-static int hsi2c_wait_for_trx(struct exynos5_hsi2c *i2c)
-{
-	int i = HSI2C_TIMEOUT_US;
-
-	while (i-- > 0) {
-		u32 int_status = readl(&i2c->usi_int_stat);
-
-		if (int_status & HSI2C_INT_I2C_EN) {
-			u32 trans_status = readl(&i2c->usi_trans_status);
-
-			/* Deassert pending interrupt. */
-			writel(int_status, &i2c->usi_int_stat);
-
-			if (trans_status & HSI2C_NO_DEV_ACK) {
-				debug("%s: no ACK from device\n", __func__);
-				return I2C_NACK;
-			}
-			if (trans_status & HSI2C_NO_DEV) {
-				debug("%s: no device\n", __func__);
-				return I2C_NOK;
-			}
-			if (trans_status & HSI2C_TRANS_ABORT) {
-				debug("%s: arbitration lost\n", __func__);
-				return I2C_NOK_LA;
-			}
-			if (trans_status & HSI2C_TIMEOUT_AUTO) {
-				debug("%s: device timed out\n", __func__);
-				return I2C_NOK_TOUT;
-			}
-			return I2C_OK;
-		}
-		udelay(1);
-	}
-	debug("%s: transaction timeout!\n", __func__);
-	return I2C_NOK_TOUT;
-}
-
 static void read_write_byte(struct s3c24x0_i2c *i2c)
 {
 	clrbits_le32(&i2c->iiccon, I2CCON_IRPND);
@@ -226,344 +80,14 @@ static void i2c_ch_init(struct s3c24x0_i2c *i2c, int speed, int slaveadd)
 	writel(I2C_MODE_MT | I2C_TXRX_ENA, &i2c->iicstat);
 }
 
-static int hsi2c_get_clk_details(struct s3c24x0_i2c_bus *i2c_bus)
-{
-	struct exynos5_hsi2c *hsregs = i2c_bus->hsregs;
-	ulong clkin;
-	unsigned int op_clk = i2c_bus->clock_frequency;
-	unsigned int i = 0, utemp0 = 0, utemp1 = 0;
-	unsigned int t_ftl_cycle;
-
-#if (defined CONFIG_EXYNOS4 || defined CONFIG_EXYNOS5)
-	clkin = get_i2c_clk();
-#else
-	clkin = get_PCLK();
-#endif
-	/* FPCLK / FI2C =
-	 * (CLK_DIV + 1) * (TSCLK_L + TSCLK_H + 2) + 8 + 2 * FLT_CYCLE
-	 * uTemp0 = (CLK_DIV + 1) * (TSCLK_L + TSCLK_H + 2)
-	 * uTemp1 = (TSCLK_L + TSCLK_H + 2)
-	 * uTemp2 = TSCLK_L + TSCLK_H
-	 */
-	t_ftl_cycle = (readl(&hsregs->usi_conf) >> 16) & 0x7;
-	utemp0 = (clkin / op_clk) - 8 - 2 * t_ftl_cycle;
-
-	/* CLK_DIV max is 256 */
-	for (i = 0; i < 256; i++) {
-		utemp1 = utemp0 / (i + 1);
-		if ((utemp1 < 512) && (utemp1 > 4)) {
-			i2c_bus->clk_cycle = utemp1 - 2;
-			i2c_bus->clk_div = i;
-			return 0;
-		}
-	}
-	return -EINVAL;
-}
-
-static void hsi2c_ch_init(struct s3c24x0_i2c_bus *i2c_bus)
-{
-	struct exynos5_hsi2c *hsregs = i2c_bus->hsregs;
-	unsigned int t_sr_release;
-	unsigned int n_clkdiv;
-	unsigned int t_start_su, t_start_hd;
-	unsigned int t_stop_su;
-	unsigned int t_data_su, t_data_hd;
-	unsigned int t_scl_l, t_scl_h;
-	u32 i2c_timing_s1;
-	u32 i2c_timing_s2;
-	u32 i2c_timing_s3;
-	u32 i2c_timing_sla;
-
-	n_clkdiv = i2c_bus->clk_div;
-	t_scl_l = i2c_bus->clk_cycle / 2;
-	t_scl_h = i2c_bus->clk_cycle / 2;
-	t_start_su = t_scl_l;
-	t_start_hd = t_scl_l;
-	t_stop_su = t_scl_l;
-	t_data_su = t_scl_l / 2;
-	t_data_hd = t_scl_l / 2;
-	t_sr_release = i2c_bus->clk_cycle;
-
-	i2c_timing_s1 = t_start_su << 24 | t_start_hd << 16 | t_stop_su << 8;
-	i2c_timing_s2 = t_data_su << 24 | t_scl_l << 8 | t_scl_h << 0;
-	i2c_timing_s3 = n_clkdiv << 16 | t_sr_release << 0;
-	i2c_timing_sla = t_data_hd << 0;
-
-	writel(HSI2C_TRAILING_COUNT, &hsregs->usi_trailing_ctl);
-
-	/* Clear to enable Timeout */
-	clrsetbits_le32(&hsregs->usi_timeout, HSI2C_TIMEOUT_EN, 0);
-
-	/* set AUTO mode */
-	writel(readl(&hsregs->usi_conf) | HSI2C_AUTO_MODE, &hsregs->usi_conf);
-
-	/* Enable completion conditions' reporting. */
-	writel(HSI2C_INT_I2C_EN, &hsregs->usi_int_en);
-
-	/* Enable FIFOs */
-	writel(HSI2C_RXFIFO_EN | HSI2C_TXFIFO_EN, &hsregs->usi_fifo_ctl);
-
-	/* Currently operating in Fast speed mode. */
-	writel(i2c_timing_s1, &hsregs->usi_timing_fs1);
-	writel(i2c_timing_s2, &hsregs->usi_timing_fs2);
-	writel(i2c_timing_s3, &hsregs->usi_timing_fs3);
-	writel(i2c_timing_sla, &hsregs->usi_timing_sla);
-}
-
-/* SW reset for the high speed bus */
-static void exynos5_i2c_reset(struct s3c24x0_i2c_bus *i2c_bus)
-{
-	struct exynos5_hsi2c *i2c = i2c_bus->hsregs;
-	u32 i2c_ctl;
-
-	/* Set and clear the bit for reset */
-	i2c_ctl = readl(&i2c->usi_ctl);
-	i2c_ctl |= HSI2C_SW_RST;
-	writel(i2c_ctl, &i2c->usi_ctl);
-
-	i2c_ctl = readl(&i2c->usi_ctl);
-	i2c_ctl &= ~HSI2C_SW_RST;
-	writel(i2c_ctl, &i2c->usi_ctl);
-
-	/* Initialize the configure registers */
-	hsi2c_ch_init(i2c_bus);
-}
-
-/*
- * Poll the appropriate bit of the fifo status register until the interface is
- * ready to process the next byte or timeout expires.
- *
- * In addition to the FIFO status register this function also polls the
- * interrupt status register to be able to detect unexpected transaction
- * completion.
- *
- * When FIFO is ready to process the next byte, this function returns I2C_OK.
- * If in course of polling the INT_I2C assertion is detected, the function
- * returns I2C_NOK. If timeout happens before any of the above conditions is
- * met - the function returns I2C_NOK_TOUT;
-
- * @param i2c: pointer to the appropriate i2c register bank.
- * @param rx_transfer: set to True if the receive transaction is in progress.
- * @return: as described above.
- */
-static unsigned hsi2c_poll_fifo(struct exynos5_hsi2c *i2c, bool rx_transfer)
-{
-	u32 fifo_bit = rx_transfer ? HSI2C_RX_FIFO_EMPTY : HSI2C_TX_FIFO_FULL;
-	int i = HSI2C_TIMEOUT_US;
-
-	while (readl(&i2c->usi_fifo_stat) & fifo_bit) {
-		if (readl(&i2c->usi_int_stat) & HSI2C_INT_I2C_EN) {
-			/*
-			 * There is a chance that assertion of
-			 * HSI2C_INT_I2C_EN and deassertion of
-			 * HSI2C_RX_FIFO_EMPTY happen simultaneously. Let's
-			 * give FIFO status priority and check it one more
-			 * time before reporting interrupt. The interrupt will
-			 * be reported next time this function is called.
-			 */
-			if (rx_transfer &&
-			    !(readl(&i2c->usi_fifo_stat) & fifo_bit))
-				break;
-			return I2C_NOK;
-		}
-		if (!i--) {
-			debug("%s: FIFO polling timeout!\n", __func__);
-			return I2C_NOK_TOUT;
-		}
-		udelay(1);
-	}
-	return I2C_OK;
-}
-
-/*
- * Preapre hsi2c transaction, either read or write.
- *
- * Set up transfer as described in section 27.5.1.2 'I2C Channel Auto Mode' of
- * the 5420 UM.
- *
- * @param i2c: pointer to the appropriate i2c register bank.
- * @param chip: slave address on the i2c bus (with read/write bit exlcuded)
- * @param len: number of bytes expected to be sent or received
- * @param rx_transfer: set to true for receive transactions
- * @param: issue_stop: set to true if i2c stop condition should be generated
- *         after this transaction.
- * @return: I2C_NOK_TOUT in case the bus remained busy for HSI2C_TIMEOUT_US,
- *          I2C_OK otherwise.
- */
-static int hsi2c_prepare_transaction(struct exynos5_hsi2c *i2c,
-				     u8 chip,
-				     u16 len,
-				     bool rx_transfer,
-				     bool issue_stop)
-{
-	u32 conf;
-
-	conf = len | HSI2C_MASTER_RUN;
-
-	if (issue_stop)
-		conf |= HSI2C_STOP_AFTER_TRANS;
-
-	/* Clear to enable Timeout */
-	writel(readl(&i2c->usi_timeout) & ~HSI2C_TIMEOUT_EN, &i2c->usi_timeout);
-
-	/* Set slave address */
-	writel(HSI2C_SLV_ADDR_MAS(chip), &i2c->i2c_addr);
-
-	if (rx_transfer) {
-		/* i2c master, read transaction */
-		writel((HSI2C_RXCHON | HSI2C_FUNC_MODE_I2C | HSI2C_MASTER),
-		       &i2c->usi_ctl);
-
-		/* read up to len bytes, stop after transaction is finished */
-		writel(conf | HSI2C_READ_WRITE, &i2c->usi_auto_conf);
-	} else {
-		/* i2c master, write transaction */
-		writel((HSI2C_TXCHON | HSI2C_FUNC_MODE_I2C | HSI2C_MASTER),
-		       &i2c->usi_ctl);
-
-		/* write up to len bytes, stop after transaction is finished */
-		writel(conf, &i2c->usi_auto_conf);
-	}
-
-	/* Reset all pending interrupt status bits we care about, if any */
-	writel(HSI2C_INT_I2C_EN, &i2c->usi_int_stat);
-
-	return I2C_OK;
-}
-
-/*
- * Wait while i2c bus is settling down (mostly stop gets completed).
- */
-static int hsi2c_wait_while_busy(struct exynos5_hsi2c *i2c)
-{
-	int i = HSI2C_TIMEOUT_US;
-
-	while (readl(&i2c->usi_trans_status) & HSI2C_MASTER_BUSY) {
-		if (!i--) {
-			debug("%s: bus busy\n", __func__);
-			return I2C_NOK_TOUT;
-		}
-		udelay(1);
-	}
-	return I2C_OK;
-}
-
-static int hsi2c_write(struct exynos5_hsi2c *i2c,
-		       unsigned char chip,
-		       unsigned char addr[],
-		       unsigned char alen,
-		       unsigned char data[],
-		       unsigned short len,
-		       bool issue_stop)
-{
-	int i, rv = 0;
-
-	if (!(len + alen)) {
-		/* Writes of zero length not supported in auto mode. */
-		debug("%s: zero length writes not supported\n", __func__);
-		return I2C_NOK;
-	}
-
-	rv = hsi2c_prepare_transaction
-		(i2c, chip, len + alen, false, issue_stop);
-	if (rv != I2C_OK)
-		return rv;
-
-	/* Move address, if any, and the data, if any, into the FIFO. */
-	for (i = 0; i < alen; i++) {
-		rv = hsi2c_poll_fifo(i2c, false);
-		if (rv != I2C_OK) {
-			debug("%s: address write failed\n", __func__);
-			goto write_error;
-		}
-		writel(addr[i], &i2c->usi_txdata);
-	}
-
-	for (i = 0; i < len; i++) {
-		rv = hsi2c_poll_fifo(i2c, false);
-		if (rv != I2C_OK) {
-			debug("%s: data write failed\n", __func__);
-			goto write_error;
-		}
-		writel(data[i], &i2c->usi_txdata);
-	}
-
-	rv = hsi2c_wait_for_trx(i2c);
-
- write_error:
-	if (issue_stop) {
-		int tmp_ret = hsi2c_wait_while_busy(i2c);
-		if (rv == I2C_OK)
-			rv = tmp_ret;
-	}
-
-	writel(HSI2C_FUNC_MODE_I2C, &i2c->usi_ctl); /* done */
-	return rv;
-}
-
-static int hsi2c_read(struct exynos5_hsi2c *i2c,
-		      unsigned char chip,
-		      unsigned char addr[],
-		      unsigned char alen,
-		      unsigned char data[],
-		      unsigned short len)
-{
-	int i, rv, tmp_ret;
-	bool drop_data = false;
-
-	if (!len) {
-		/* Reads of zero length not supported in auto mode. */
-		debug("%s: zero length read adjusted\n", __func__);
-		drop_data = true;
-		len = 1;
-	}
-
-	if (alen) {
-		/* Internal register adress needs to be written first. */
-		rv = hsi2c_write(i2c, chip, addr, alen, NULL, 0, false);
-		if (rv != I2C_OK)
-			return rv;
-	}
-
-	rv = hsi2c_prepare_transaction(i2c, chip, len, true, true);
-
-	if (rv != I2C_OK)
-		return rv;
-
-	for (i = 0; i < len; i++) {
-		rv = hsi2c_poll_fifo(i2c, true);
-		if (rv != I2C_OK)
-			goto read_err;
-		if (drop_data)
-			continue;
-		data[i] = readl(&i2c->usi_rxdata);
-	}
-
-	rv = hsi2c_wait_for_trx(i2c);
-
- read_err:
-	tmp_ret = hsi2c_wait_while_busy(i2c);
-	if (rv == I2C_OK)
-		rv = tmp_ret;
-
-	writel(HSI2C_FUNC_MODE_I2C, &i2c->usi_ctl); /* done */
-	return rv;
-}
-
 static int s3c24x0_i2c_set_bus_speed(struct udevice *dev, unsigned int speed)
 {
 	struct s3c24x0_i2c_bus *i2c_bus = dev_get_priv(dev);
 
 	i2c_bus->clock_frequency = speed;
 
-	if (i2c_bus->is_highspeed) {
-		if (hsi2c_get_clk_details(i2c_bus))
-			return -EFAULT;
-		hsi2c_ch_init(i2c_bus);
-	} else {
-		i2c_ch_init(i2c_bus->regs, i2c_bus->clock_frequency,
-			    CONFIG_SYS_I2C_S3C24X0_SLAVE);
-	}
+	i2c_ch_init(i2c_bus->regs, i2c_bus->clock_frequency,
+		    CONFIG_SYS_I2C_S3C24X0_SLAVE);
 
 	return 0;
 }
@@ -693,41 +217,11 @@ static int s3c24x0_i2c_probe(struct udevice *dev, uint chip, uint chip_flags)
 	 * address was <ACK>ed (i.e. there was a chip at that address which
 	 * drove the data line low).
 	 */
-	if (i2c_bus->is_highspeed) {
-		ret = hsi2c_read(i2c_bus->hsregs,
-				chip, 0, 0, buf, 1);
-	} else {
-		ret = i2c_transfer(i2c_bus->regs,
-				I2C_READ, chip << 1, 0, 0, buf, 1);
-	}
+	ret = i2c_transfer(i2c_bus->regs, I2C_READ, chip << 1, 0, 0, buf, 1);
 
 	return ret != I2C_OK;
 }
 
-static int exynos_hs_i2c_xfer(struct udevice *dev, struct i2c_msg *msg,
-			      int nmsgs)
-{
-	struct s3c24x0_i2c_bus *i2c_bus = dev_get_priv(dev);
-	struct exynos5_hsi2c *hsregs = i2c_bus->hsregs;
-	int ret;
-
-	for (; nmsgs > 0; nmsgs--, msg++) {
-		if (msg->flags & I2C_M_RD) {
-			ret = hsi2c_read(hsregs, msg->addr, 0, 0, msg->buf,
-					 msg->len);
-		} else {
-			ret = hsi2c_write(hsregs, msg->addr, 0, 0, msg->buf,
-					  msg->len, true);
-		}
-		if (ret) {
-			exynos5_i2c_reset(i2c_bus);
-			return -EREMOTEIO;
-		}
-	}
-
-	return 0;
-}
-
 static int s3c24x0_do_msg(struct s3c24x0_i2c_bus *i2c_bus, struct i2c_msg *msg,
 			  int seq)
 {
@@ -810,18 +304,11 @@ static int s3c_i2c_ofdata_to_platdata(struct udevice *dev)
 {
 	const void *blob = gd->fdt_blob;
 	struct s3c24x0_i2c_bus *i2c_bus = dev_get_priv(dev);
-	int node, flags;
+	int node;
 
-	i2c_bus->is_highspeed = dev_get_driver_data(dev);
 	node = dev->of_offset;
 
-	if (i2c_bus->is_highspeed) {
-		flags = PINMUX_FLAG_HS_MODE;
-		i2c_bus->hsregs = (struct exynos5_hsi2c *)dev_get_addr(dev);
-	} else {
-		flags = 0;
-		i2c_bus->regs = (struct s3c24x0_i2c *)dev_get_addr(dev);
-	}
+	i2c_bus->regs = (struct s3c24x0_i2c *)dev_get_addr(dev);
 
 	i2c_bus->id = pinmux_decode_periph_id(blob, node);
 
@@ -830,7 +317,7 @@ static int s3c_i2c_ofdata_to_platdata(struct udevice *dev)
 	i2c_bus->node = node;
 	i2c_bus->bus_num = dev->seq;
 
-	exynos_pinmux_config(i2c_bus->id, flags);
+	exynos_pinmux_config(i2c_bus->id, 0);
 
 	i2c_bus->active = true;
 
@@ -844,7 +331,7 @@ static const struct dm_i2c_ops s3c_i2c_ops = {
 };
 
 static const struct udevice_id s3c_i2c_ids[] = {
-	{ .compatible = "samsung,s3c2440-i2c", .data = EXYNOS_I2C_STD },
+	{ .compatible = "samsung,s3c2440-i2c" },
 	{ }
 };
 
@@ -856,27 +343,3 @@ U_BOOT_DRIVER(i2c_s3c) = {
 	.priv_auto_alloc_size = sizeof(struct s3c24x0_i2c_bus),
 	.ops	= &s3c_i2c_ops,
 };
-
-/*
- * TODO(sjg@chromium.org): Move this to a separate file when everything uses
- * driver model
- */
-static const struct dm_i2c_ops exynos_hs_i2c_ops = {
-	.xfer		= exynos_hs_i2c_xfer,
-	.probe_chip	= s3c24x0_i2c_probe,
-	.set_bus_speed	= s3c24x0_i2c_set_bus_speed,
-};
-
-static const struct udevice_id exynos_hs_i2c_ids[] = {
-	{ .compatible = "samsung,exynos5-hsi2c", .data = EXYNOS_I2C_HS },
-	{ }
-};
-
-U_BOOT_DRIVER(hs_i2c) = {
-	.name	= "i2c_s3c_hs",
-	.id	= UCLASS_I2C,
-	.of_match = exynos_hs_i2c_ids,
-	.ofdata_to_platdata = s3c_i2c_ofdata_to_platdata,
-	.priv_auto_alloc_size = sizeof(struct s3c24x0_i2c_bus),
-	.ops	= &exynos_hs_i2c_ops,
-};

drivers/i2c/s3c24x0_i2c.h

@@ -59,4 +59,26 @@ struct s3c24x0_i2c_bus {
 	unsigned clk_cycle;
 	unsigned clk_div;
 };
+
+#define	I2C_WRITE	0
+#define I2C_READ	1
+
+#define I2C_OK		0
+#define I2C_NOK		1
+#define I2C_NACK	2
+#define I2C_NOK_LA	3	/* Lost arbitration */
+#define I2C_NOK_TOUT	4	/* time out */
+
+/* S3C I2C Controller bits */
+#define I2CSTAT_BSY	0x20	/* Busy bit */
+#define I2CSTAT_NACK	0x01	/* Nack bit */
+#define I2CCON_ACKGEN	0x80	/* Acknowledge generation */
+#define I2CCON_IRPND	0x10	/* Interrupt pending bit */
+#define I2C_MODE_MT	0xC0	/* Master Transmit Mode */
+#define I2C_MODE_MR	0x80	/* Master Receive Mode */
+#define I2C_START_STOP	0x20	/* START / STOP */
+#define I2C_TXRX_ENA	0x10	/* I2C Tx/Rx enable */
+
+#define I2C_TIMEOUT_MS 10		/* 10 ms */
+
 #endif /* _S3C24X0_I2C_H */