aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/i2c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/scx200_acb.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c
index 22a3eda04166..454086affaa1 100644
--- a/drivers/i2c/busses/scx200_acb.c
+++ b/drivers/i2c/busses/scx200_acb.c
@@ -184,21 +184,21 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status)
184 break; 184 break;
185 185
186 case state_read: 186 case state_read:
187 /* Set ACK if receiving the last byte */ 187 /* Set ACK if _next_ byte will be the last one */
188 if (iface->len == 1) 188 if (iface->len == 2)
189 outb(inb(ACBCTL1) | ACBCTL1_ACK, ACBCTL1); 189 outb(inb(ACBCTL1) | ACBCTL1_ACK, ACBCTL1);
190 else 190 else
191 outb(inb(ACBCTL1) & ~ACBCTL1_ACK, ACBCTL1); 191 outb(inb(ACBCTL1) & ~ACBCTL1_ACK, ACBCTL1);
192 192
193 *iface->ptr++ = inb(ACBSDA); 193 if (iface->len == 1) {
194 --iface->len;
195
196 if (iface->len == 0) {
197 iface->result = 0; 194 iface->result = 0;
198 iface->state = state_idle; 195 iface->state = state_idle;
199 outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1); 196 outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1);
200 } 197 }
201 198
199 *iface->ptr++ = inb(ACBSDA);
200 --iface->len;
201
202 break; 202 break;
203 203
204 case state_write: 204 case state_write: