ARM: AM33XX: Add AM33XX I2C driver support

1. Compliant with Philips I2C specification version 2.1
2. Supports upto 100Kbps in standard mode

Signed-off-by: Chandan Nath <chandan.nath@ti.com>
Signed-off-by: Patil, Rachna <rachna@ti.com>

diff --git a/drivers/i2c/omap24xx_i2c.c b/drivers/i2c/omap24xx_i2c.c
index 80932eff8149733c76d276221714a5adfbbc6bab..f06af02ba31336954ace8cd312a0da07b93c000e 100644 (file)
--- a/drivers/i2c/omap24xx_i2c.c
+++ b/drivers/i2c/omap24xx_i2c.c
@@ -147,7 +147,7 @@ static void flush_fifo(void)
                stat = readw(&i2c_base->stat);
                if (stat == I2C_STAT_RRDY) {
 #if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
-       defined(CONFIG_OMAP44XX)
+       defined(CONFIG_OMAP44XX) || defined(CONFIG_AM33XX)
                        readb(&i2c_base->data);
 #else
                        readw(&i2c_base->data);
@@ -247,7 +247,8 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
                        switch (alen) {
                        case 2:
                                /* Send address MSByte */
-#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
+#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
+                       defined(CONFIG_AM33XX)
                                writew(((addr >> 8) & 0xFF), &i2c_base->data);
 
                                /* Clearing XRDY event */
@@ -264,7 +265,8 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
                                }
 #endif
                        case 1:
-#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
+#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
+                       defined(CONFIG_AM33XX)
                                /* Send address LSByte */
                                writew((addr & 0xFF), &i2c_base->data);
 #else
@@ -313,7 +315,8 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
                        }
 
                        if (status & I2C_STAT_RRDY) {
-#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
+#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
+                       defined(CONFIG_AM33XX)
                                buffer[i] = readb(&i2c_base->data);
 #else
                                *((u16 *)&buffer[i]) =
@@ -400,7 +403,8 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
        if (!i2c_error) {
                if (status & I2C_STAT_XRDY) {
                        switch (alen) {
-#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
+#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
+                       defined(CONFIG_AM33XX)
                        case 2:
                                /* send out MSB byte */
                                writeb(((addr >> 8) & 0xFF), &i2c_base->data);
@@ -420,7 +424,8 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
                                        break;
                                }
                        case 1:
-#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
+#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
+                       defined(CONFIG_AM33XX)
                                /* send out MSB byte */
                                writeb((addr  & 0xFF), &i2c_base->data);
 #else
@@ -442,7 +447,8 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
                if (!i2c_error) {
                        for (i = ((alen > 1) ? 0 : 1); i < len; i++) {
                                if (status & I2C_STAT_XRDY) {
-#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
+#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
+                               defined(CONFIG_AM33XX)
                                        writeb((buffer[i] & 0xFF),
                                                &i2c_base->data);
 #else