mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 06:00:43 +00:00
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>
This commit is contained in:
parent
2faa76196a
commit
498cbdfe62
1 changed files with 13 additions and 7 deletions
|
@ -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
|
||||
|
|
Loading…
Reference in a new issue