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i2c: rcar: use the new get_bus_free callback

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To break out of recovery as early as possible, feed back the bus_free
logic state.

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 2018-07-11 00:24:23 +02:00 committed by Wolfram Sang
parent 7ca5f6be79
commit 4fe10de535
1 changed files with 11 additions and 10 deletions
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21
drivers/i2c/busses/i2c-rcar.c
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@ -179,8 +179,6 @@ static void rcar_i2c_set_scl(struct i2c_adapter *adap, int val)
rcar_i2c_write(priv, ICMCR, priv->recovery_icmcr);
};
/* No get_sda, because the HW only reports its bus free logic, not SDA itself */
static void rcar_i2c_set_sda(struct i2c_adapter *adap, int val)
{
struct rcar_i2c_priv *priv = i2c_get_adapdata(adap);
@ -193,10 +191,19 @@ static void rcar_i2c_set_sda(struct i2c_adapter *adap, int val)
rcar_i2c_write(priv, ICMCR, priv->recovery_icmcr);
};
static int rcar_i2c_get_bus_free(struct i2c_adapter *adap)
{
struct rcar_i2c_priv *priv = i2c_get_adapdata(adap);
return !(rcar_i2c_read(priv, ICMCR) & FSDA);
};
static struct i2c_bus_recovery_info rcar_i2c_bri = {
.get_scl = rcar_i2c_get_scl,
.set_scl = rcar_i2c_set_scl,
.set_sda = rcar_i2c_set_sda,
.get_bus_free = rcar_i2c_get_bus_free,
.recover_bus = i2c_generic_scl_recovery,
};
static void rcar_i2c_init(struct rcar_i2c_priv *priv)
@ -211,7 +218,7 @@ static void rcar_i2c_init(struct rcar_i2c_priv *priv)
static int rcar_i2c_bus_barrier(struct rcar_i2c_priv *priv)
{
int i, ret;
int i;
for (i = 0; i < LOOP_TIMEOUT; i++) {
/* make sure that bus is not busy */
@ -222,13 +229,7 @@ static int rcar_i2c_bus_barrier(struct rcar_i2c_priv *priv)
/* Waiting did not help, try to recover */
priv->recovery_icmcr = MDBS | OBPC | FSDA | FSCL;
ret = i2c_recover_bus(&priv->adap);
/* No failure when recovering, so check bus busy bit again */
if (ret == 0)
ret = (rcar_i2c_read(priv, ICMCR) & FSDA) ? -EBUSY : 0;
return ret;
return i2c_recover_bus(&priv->adap);
}
static int rcar_i2c_clock_calculate(struct rcar_i2c_priv *priv, struct i2c_timings *t)