i2c: rcar: refactor irq state machine
Remove the seperate functions and use designated constants. As readable
but less overhead. Actually, this is even more readable since the old
function used a mix of "=" and "|=".
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index eadaca0..f2cbb8a 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -83,12 +83,9 @@
#define RCAR_BUS_PHASE_DATA (MDBS | MIE)
#define RCAR_BUS_PHASE_STOP (MDBS | MIE | FSB)
-enum {
- RCAR_IRQ_CLOSE,
- RCAR_IRQ_OPEN_FOR_SEND,
- RCAR_IRQ_OPEN_FOR_RECV,
- RCAR_IRQ_OPEN_FOR_STOP,
-};
+#define RCAR_IRQ_SEND (MNRE | MALE | MSTE | MATE | MDEE)
+#define RCAR_IRQ_RECV (MNRE | MALE | MSTE | MATE | MDRE)
+#define RCAR_IRQ_STOP (MSTE)
/*
* flags
@@ -158,28 +155,6 @@
rcar_i2c_write(priv, ICMAR, 0);
}
-static void rcar_i2c_irq_mask(struct rcar_i2c_priv *priv, int open)
-{
- u32 val = MNRE | MALE | MSTE | MATE; /* default */
-
- switch (open) {
- case RCAR_IRQ_OPEN_FOR_SEND:
- val |= MDEE; /* default + send */
- break;
- case RCAR_IRQ_OPEN_FOR_RECV:
- val |= MDRE; /* default + read */
- break;
- case RCAR_IRQ_OPEN_FOR_STOP:
- val = MSTE; /* stop irq only */
- break;
- case RCAR_IRQ_CLOSE:
- default:
- val = 0; /* all close */
- break;
- }
- rcar_i2c_write(priv, ICMIER, val);
-}
-
static void rcar_i2c_set_addr(struct rcar_i2c_priv *priv, u32 recv)
{
rcar_i2c_write(priv, ICMAR, (priv->msg->addr << 1) | recv);
@@ -312,7 +287,7 @@
rcar_i2c_set_addr(priv, 1);
rcar_i2c_status_clear(priv);
rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_START);
- rcar_i2c_irq_mask(priv, RCAR_IRQ_OPEN_FOR_RECV);
+ rcar_i2c_write(priv, ICMIER, RCAR_IRQ_RECV);
return 0;
}
@@ -331,7 +306,7 @@
rcar_i2c_set_addr(priv, 0);
rcar_i2c_status_clear(priv);
rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_START);
- rcar_i2c_irq_mask(priv, RCAR_IRQ_OPEN_FOR_SEND);
+ rcar_i2c_write(priv, ICMIER, RCAR_IRQ_SEND);
return 0;
}
@@ -486,7 +461,7 @@
/* go to stop phase */
rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_STOP);
- rcar_i2c_irq_mask(priv, RCAR_IRQ_OPEN_FOR_STOP);
+ rcar_i2c_write(priv, ICMIER, RCAR_IRQ_STOP);
rcar_i2c_flags_set(priv, ID_NACK);
goto out;
}
@@ -501,7 +476,7 @@
out:
if (rcar_i2c_flags_has(priv, ID_DONE)) {
- rcar_i2c_irq_mask(priv, RCAR_IRQ_CLOSE);
+ rcar_i2c_write(priv, ICMIER, 0);
rcar_i2c_status_clear(priv);
wake_up(&priv->wait);
}