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path: root/drivers/i2c/designware_i2c.c
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Diffstat (limited to 'drivers/i2c/designware_i2c.c')
-rw-r--r--drivers/i2c/designware_i2c.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/i2c/designware_i2c.c b/drivers/i2c/designware_i2c.c
index 4e4bfd4..eab3131 100644
--- a/drivers/i2c/designware_i2c.c
+++ b/drivers/i2c/designware_i2c.c
@@ -283,7 +283,10 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
start_time_rx = get_timer(0);
while (len) {
- writel(IC_CMD, &i2c_regs_p->ic_cmd_data);
+ if (len == 1)
+ writel(IC_CMD | IC_STOP, &i2c_regs_p->ic_cmd_data);
+ else
+ writel(IC_CMD, &i2c_regs_p->ic_cmd_data);
if (readl(&i2c_regs_p->ic_status) & IC_STATUS_RFNE) {
*buffer++ = (uchar)readl(&i2c_regs_p->ic_cmd_data);
@@ -322,9 +325,11 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
start_time_tx = get_timer(0);
while (len) {
if (readl(&i2c_regs_p->ic_status) & IC_STATUS_TFNF) {
- writel(*buffer, &i2c_regs_p->ic_cmd_data);
+ if (--len == 0)
+ writel(*buffer | IC_STOP, &i2c_regs_p->ic_cmd_data);
+ else
+ writel(*buffer, &i2c_regs_p->ic_cmd_data);
buffer++;
- len--;
start_time_tx = get_timer(0);
} else if (get_timer(start_time_tx) > (nb * I2C_BYTE_TO)) {