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i2c: riic: fix restart condition
[ Upstream commit2501c1bb05
] While modifying the driver to use the STOP interrupt, the completion of the intermediate transfers need to wake the driver back up in order to initiate the next transfer (restart condition). Otherwise you get never ending interrupts and only the first transfer sent. Fixes:71ccea095e
("i2c: riic: correctly finish transfers") Reported-by: Simon Horman <horms@verge.net.au> Signed-off-by: Chris Brandt <chris.brandt@renesas.com> Tested-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -218,8 +218,12 @@ static irqreturn_t riic_tend_isr(int irq, void *data)
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}
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if (riic->is_last || riic->err) {
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riic_clear_set_bit(riic, 0, ICIER_SPIE, RIIC_ICIER);
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riic_clear_set_bit(riic, ICIER_TEIE, ICIER_SPIE, RIIC_ICIER);
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writeb(ICCR2_SP, riic->base + RIIC_ICCR2);
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} else {
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/* Transfer is complete, but do not send STOP */
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riic_clear_set_bit(riic, ICIER_TEIE, 0, RIIC_ICIER);
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complete(&riic->msg_done);
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}
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return IRQ_HANDLED;
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