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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>
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parent
2faa76196a
commit
498cbdfe62
1 changed files with 13 additions and 7 deletions
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@ -147,7 +147,7 @@ static void flush_fifo(void)
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stat = readw(&i2c_base->stat);
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if (stat == I2C_STAT_RRDY) {
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
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defined(CONFIG_OMAP44XX)
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defined(CONFIG_OMAP44XX) || defined(CONFIG_AM33XX)
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readb(&i2c_base->data);
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#else
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readw(&i2c_base->data);
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@ -247,7 +247,8 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
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switch (alen) {
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case 2:
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/* Send address MSByte */
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
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defined(CONFIG_AM33XX)
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writew(((addr >> 8) & 0xFF), &i2c_base->data);
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/* Clearing XRDY event */
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@ -264,7 +265,8 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
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}
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#endif
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case 1:
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
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defined(CONFIG_AM33XX)
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/* Send address LSByte */
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writew((addr & 0xFF), &i2c_base->data);
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#else
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@ -313,7 +315,8 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
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}
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if (status & I2C_STAT_RRDY) {
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
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defined(CONFIG_AM33XX)
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buffer[i] = readb(&i2c_base->data);
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#else
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*((u16 *)&buffer[i]) =
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@ -400,7 +403,8 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
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if (!i2c_error) {
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if (status & I2C_STAT_XRDY) {
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switch (alen) {
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
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defined(CONFIG_AM33XX)
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case 2:
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/* send out MSB byte */
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writeb(((addr >> 8) & 0xFF), &i2c_base->data);
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@ -420,7 +424,8 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
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break;
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}
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case 1:
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
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defined(CONFIG_AM33XX)
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/* send out MSB byte */
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writeb((addr & 0xFF), &i2c_base->data);
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#else
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@ -442,7 +447,8 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
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if (!i2c_error) {
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for (i = ((alen > 1) ? 0 : 1); i < len; i++) {
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if (status & I2C_STAT_XRDY) {
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
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#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
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defined(CONFIG_AM33XX)
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writeb((buffer[i] & 0xFF),
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&i2c_base->data);
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#else
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