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authorTroy Kisky <troy.kisky@boundarydevices.com>2012-07-19 08:18:17 +0000
committerHeiko Schocher <hs@denx.de>2012-07-31 07:55:13 +0200
commit27a5da02c094c9b73c01aa699f13591b824d5436 (patch)
tree554b346ad9a3821ed73f5befaf9c7ee8db10fcbf /drivers/i2c/mxc_i2c.c
parenta7f1a0051078052cb81ba1ff5985b908f39cefd5 (diff)
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mxc_i2c: add i2c_regs argument to i2c_imx_stop
This is prep work for CONFIG_I2C_MULTI_BUS. Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Acked-by: Marek Vasut <marex@denx.de>
Diffstat (limited to 'drivers/i2c/mxc_i2c.c')
-rw-r--r--drivers/i2c/mxc_i2c.c19
1 files changed, 7 insertions, 12 deletions
diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c
index cbb0fff..44a04b5 100644
--- a/drivers/i2c/mxc_i2c.c
+++ b/drivers/i2c/mxc_i2c.c
@@ -201,10 +201,9 @@ static int tx_byte(struct mxc_i2c_regs *i2c_regs, u8 byte)
/*
* Stop I2C transaction
*/
-void i2c_imx_stop(void)
+static void i2c_imx_stop(struct mxc_i2c_regs *i2c_regs)
{
int ret;
- struct mxc_i2c_regs *i2c_regs = (struct mxc_i2c_regs *)I2C_BASE;
unsigned int temp = readb(&i2c_regs->i2cr);
temp &= ~(I2CR_MSTA | I2CR_MTX);
@@ -271,7 +270,7 @@ static int i2c_init_transfer(struct mxc_i2c_regs *i2c_regs,
ret = i2c_init_transfer_(i2c_regs, chip, addr, alen);
if (ret >= 0)
return 0;
- i2c_imx_stop();
+ i2c_imx_stop(i2c_regs);
if (ret == -ENODEV)
return ret;
@@ -305,7 +304,7 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
ret = tx_byte(i2c_regs, (chip << 1) | 1);
if (ret < 0) {
- i2c_imx_stop();
+ i2c_imx_stop(i2c_regs);
return ret;
}
@@ -322,7 +321,7 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
for (i = 0; i < len; i++) {
ret = wait_for_sr_state(i2c_regs, ST_IIF);
if (ret < 0) {
- i2c_imx_stop();
+ i2c_imx_stop(i2c_regs);
return ret;
}
@@ -331,7 +330,7 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
* controller from generating another clock cycle
*/
if (i == (len - 1)) {
- i2c_imx_stop();
+ i2c_imx_stop(i2c_regs);
} else if (i == (len - 2)) {
temp = readb(&i2c_regs->i2cr);
temp |= I2CR_TX_NO_AK;
@@ -340,9 +339,7 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
writeb(0, &i2c_regs->i2sr);
buf[i] = readb(&i2c_regs->i2dr);
}
-
- i2c_imx_stop();
-
+ i2c_imx_stop(i2c_regs);
return 0;
}
@@ -364,9 +361,7 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
if (ret < 0)
break;
}
-
- i2c_imx_stop();
-
+ i2c_imx_stop(i2c_regs);
return ret;
}