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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2015-11-19 16:56:47 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2015-11-30 14:21:50 +0100 |
| commit | d89667b14f9d13b684287f6189ca209af5feee43 (patch) | |
| tree | fdb11defcb24b49cee8aa2dcf783755f60a30f4b /drivers | |
| parent | cc21d0b4b62e41e5013d763adade5ea4462c33a4 (diff) | |
| download | linux-stable-d89667b14f9d13b684287f6189ca209af5feee43.tar.gz linux-stable-d89667b14f9d13b684287f6189ca209af5feee43.tar.bz2 linux-stable-d89667b14f9d13b684287f6189ca209af5feee43.zip | |
i2c: rcar: don't issue stop when HW does it automatically
The manual says (55.4.8.6) that HW does automatically send STOP after
NACK was received. My measuerments confirm that.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/busses/i2c-rcar.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index d91acc116315..87fccf20fc4c 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -455,8 +455,8 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr) /* Nack */ if (msr & MNR) { - /* go to stop phase */ - rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_STOP); + /* HW automatically sends STOP after received NACK */ + rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_DATA); rcar_i2c_write(priv, ICMIER, RCAR_IRQ_STOP); rcar_i2c_flags_set(priv, ID_NACK); goto out; |