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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2018-07-11 00:24:23 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2018-07-17 10:47:53 +0200 |
| commit | 4fe10de535ead365351d49e0ff625769b08f6eca (patch) | |
| tree | 01c4a9cf6eff82b116bfe129b97a966b7b64b083 /drivers/i2c | |
| parent | i2c: recovery: add get_bus_free callback (diff) | |
| download | linux-4fe10de535ead365351d49e0ff625769b08f6eca.tar.xz linux-4fe10de535ead365351d49e0ff625769b08f6eca.zip | |
i2c: rcar: use the new get_bus_free callback
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>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-rcar.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 5e310efd9446..76154747971e 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -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) |