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46 lines
1.5 KiB
Diff
46 lines
1.5 KiB
Diff
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From c96b850a977e3b7018c5ef1b145a3c11cb160265 Mon Sep 17 00:00:00 2001
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From: mokopatches <mokopatches@openmoko.org>
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Date: Wed, 16 Jul 2008 14:44:50 +0100
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Subject: [PATCH] pcf50633-suspend-hacks.patch
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---
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drivers/i2c/chips/pcf50633.c | 22 ++++++++++++++++++++--
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1 files changed, 20 insertions(+), 2 deletions(-)
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diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
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index 5488084..0cf5e53 100644
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--- a/drivers/i2c/chips/pcf50633.c
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+++ b/drivers/i2c/chips/pcf50633.c
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@@ -567,8 +567,26 @@ static void pcf50633_work(struct work_struct *work)
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*/
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ret = i2c_smbus_read_i2c_block_data(&pcf->client, PCF50633_REG_INT1, 5,
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pcfirq);
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- if (ret != 5)
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- DEBUGP("Oh crap PMU IRQ register read failed %d\n", ret);
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+ if (ret != 5) {
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+ DEBUGP("Oh crap PMU IRQ register read failed -- "
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+ "retrying later %d\n", ret);
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+ /*
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+ * this situation can happen during resume, just defer
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+ * handling the interrupt until enough I2C is up we can
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+ * actually talk to the PMU. We can't just ignore this
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+ * because we are on a falling edge interrupt and our
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+ * PMU interrupt source does not clear until we read these
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+ * interrupt source registers.
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+ */
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+ if (!schedule_work(&pcf->work) && !pcf->working)
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+ dev_dbg(&pcf->client.dev, "work item may be lost\n");
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+
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+ /* we don't put the device here, hold it for next time */
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+ mutex_unlock(&pcf->working_lock);
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+ /* don't spew, delaying whatever else is happening */
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+ msleep(1);
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+ return;
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+ }
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if (!pcf->coldplug_done) {
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DEBUGP("PMU Coldplug init\n");
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--
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1.5.6.3
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