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i2c: rcar: remove macros dealing with flags

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These macros don't really hide complexity, but C idioms. Removing them
makes the code easier to read IMO and make a planned extension easier.

Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2015-12-23 17:56:33 +01:00 • committed by Wolfram Sang
parent 0c739738a0
commit 42c0783b89
1 changed files with 9 additions and 13 deletions
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22
drivers/i2c/busses/i2c-rcar.c
View file

@ -122,9 +122,6 @@ struct rcar_i2c_priv {
#define rcar_i2c_priv_to_dev(p) ((p)->adap.dev.parent)
#define rcar_i2c_is_recv(p) ((p)->msg->flags & I2C_M_RD)
#define rcar_i2c_flags_set(p, f) ((p)->flags |= (f))
#define rcar_i2c_flags_has(p, f) ((p)->flags & (f))
#define LOOP_TIMEOUT 1024
@ -258,7 +255,7 @@ static void rcar_i2c_prepare_msg(struct rcar_i2c_priv *priv)
priv->pos = 0;
if (priv->msgs_left == 1)
rcar_i2c_flags_set(priv, ID_LAST_MSG);
priv->flags |= ID_LAST_MSG;
rcar_i2c_write(priv, ICMAR, (priv->msg->addr << 1) | read);
/*
@ -266,7 +263,7 @@ static void rcar_i2c_prepare_msg(struct rcar_i2c_priv *priv)
* of ICMSR and ICMCR depends on whether we issue START or REP_START. Since
* it didn't cause a drawback for me, let's rather be safe than sorry.
*/
if (rcar_i2c_flags_has(priv, ID_FIRST_MSG)) {
if (priv->flags & ID_FIRST_MSG) {
rcar_i2c_write(priv, ICMSR, 0);
rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_START);
} else {
@ -438,7 +435,7 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr)
/* Arbitration lost */
if (msr & MAL) {
rcar_i2c_flags_set(priv, (ID_DONE | ID_ARBLOST));
priv->flags |= ID_DONE | ID_ARBLOST;
goto out;
}
@ -446,14 +443,14 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr)
if (msr & MNR) {
/* HW automatically sends STOP after received NACK */
rcar_i2c_write(priv, ICMIER, RCAR_IRQ_STOP);
rcar_i2c_flags_set(priv, ID_NACK);
priv->flags |= ID_NACK;
goto out;
}
/* Stop */
if (msr & MST) {
priv->msgs_left--; /* The last message also made it */
rcar_i2c_flags_set(priv, ID_DONE);
priv->flags |= ID_DONE;
goto out;
}
@ -463,7 +460,7 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr)
rcar_i2c_irq_send(priv, msr);
out:
if (rcar_i2c_flags_has(priv, ID_DONE)) {
if (priv->flags & ID_DONE) {
rcar_i2c_write(priv, ICMIER, 0);
rcar_i2c_write(priv, ICMSR, 0);
wake_up(&priv->wait);
@ -501,15 +498,14 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap,
priv->flags = ID_FIRST_MSG;
rcar_i2c_prepare_msg(priv);
time_left = wait_event_timeout(priv->wait,
rcar_i2c_flags_has(priv, ID_DONE),
time_left = wait_event_timeout(priv->wait, priv->flags & ID_DONE,
num * adap->timeout);
if (!time_left) {
rcar_i2c_init(priv);
ret = -ETIMEDOUT;
} else if (rcar_i2c_flags_has(priv, ID_NACK)) {
} else if (priv->flags & ID_NACK) {
ret = -ENXIO;
} else if (rcar_i2c_flags_has(priv, ID_ARBLOST)) {
} else if (priv->flags & ID_ARBLOST) {
ret = -EAGAIN;
} else {
ret = num - priv->msgs_left; /* The number of transfer */