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OpenCloudOS-Kernel
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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>
This commit is contained in:
Wolfram Sang 2015-09-03 22:20:10 +02:00 committed by Wolfram Sang
parent 2bc3c5a863
commit 315a1736a2
1 changed files with 2 additions and 2 deletions
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4
drivers/i2c/busses/i2c-rcar.c
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@ -458,8 +458,8 @@ 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;