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authorTomoya MORINAGA <tomoya.rohm@gmail.com>2012-04-19 15:38:05 +0900
committerWolfram Sang <w.sang@pengutronix.de>2012-05-12 14:28:13 +0200
commit199bca2a72a3a5cd71401b4f12171393742be84a (patch)
tree67e359c6fed52fa173e82c69ef7eece64bd38c6d /drivers/i2c/busses
parent5cc056327ae3a3fac7411691c27ac61be2c55957 (diff)
downloadlinux-linaro-stable-199bca2a72a3a5cd71401b4f12171393742be84a.tar.gz
i2c-eg20t: Merge two functions
By previous patch, pch_i2c_wait_for_xfer_complete can be merged to pch_i2c_wait_for_check_xfer. Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'drivers/i2c/busses')
-rw-r--r--drivers/i2c/busses/i2c-eg20t.c65
1 files changed, 22 insertions, 43 deletions
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index 943084a3b690..9da12cecb3bb 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -317,33 +317,6 @@ static void pch_i2c_start(struct i2c_algo_pch_data *adap)
}
/**
- * pch_i2c_wait_for_xfer_complete() - initiates a wait for the tx complete event
- * @adap: Pointer to struct i2c_algo_pch_data.
- */
-static s32 pch_i2c_wait_for_xfer_complete(struct i2c_algo_pch_data *adap)
-{
- long ret;
- ret = wait_event_timeout(pch_event,
- (adap->pch_event_flag != 0), msecs_to_jiffies(1000));
-
- if (ret == 0) {
- pch_err(adap, "timeout: %x\n", adap->pch_event_flag);
- adap->pch_event_flag = 0;
- return -ETIMEDOUT;
- }
-
- if (adap->pch_event_flag & I2C_ERROR_MASK) {
- pch_err(adap, "error bits set: %x\n", adap->pch_event_flag);
- adap->pch_event_flag = 0;
- return -EIO;
- }
-
- adap->pch_event_flag = 0;
-
- return 0;
-}
-
-/**
* pch_i2c_getack() - to confirm ACK/NACK
* @adap: Pointer to struct i2c_algo_pch_data.
*/
@@ -375,27 +348,33 @@ static void pch_i2c_stop(struct i2c_algo_pch_data *adap)
static int pch_i2c_wait_for_check_xfer(struct i2c_algo_pch_data *adap)
{
- int rtn;
-
- rtn = pch_i2c_wait_for_xfer_complete(adap);
- if (rtn == 0) {
- if (pch_i2c_getack(adap)) {
- pch_dbg(adap, "Receive NACK for slave address"
- "setting\n");
- return -EIO;
- }
- } else if (rtn == -EIO) { /* Arbitration Lost */
+ long ret;
+
+ ret = wait_event_timeout(pch_event,
+ (adap->pch_event_flag != 0), msecs_to_jiffies(1000));
+ if (!ret) {
+ pch_err(adap, "%s:wait-event timeout\n", __func__);
+ adap->pch_event_flag = 0;
+ pch_i2c_stop(adap);
+ pch_i2c_init(adap);
+ return -ETIMEDOUT;
+ }
+
+ if (adap->pch_event_flag & I2C_ERROR_MASK) {
pch_err(adap, "Lost Arbitration\n");
+ adap->pch_event_flag = 0;
pch_clrbit(adap->pch_base_address, PCH_I2CSR, I2CMAL_BIT);
pch_clrbit(adap->pch_base_address, PCH_I2CSR, I2CMIF_BIT);
pch_i2c_init(adap);
return -EAGAIN;
- } else { /* wait-event timeout */
- pch_err(adap, "%s(L.%d):wait-event timeout\n",
- __func__, __LINE__);
- pch_i2c_stop(adap);
- pch_i2c_init(adap);
- return -ETIME;
+ }
+
+ adap->pch_event_flag = 0;
+
+ if (pch_i2c_getack(adap)) {
+ pch_dbg(adap, "Receive NACK for slave address"
+ "setting\n");
+ return -EIO;
}
return 0;