The prog irq is a level irq reflecting the prog clk status. As a result the
irq line will stay high when the prog clk is ready and the system will
hang.
Disable the irq when it is handled to avoid this problem.
Signed-off-by: Boris BREZILLON <b.brezil...@overkiz.com>
---
drivers/clk/at91/clk-programmable.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/at91/clk-programmable.c
b/drivers/clk/at91/clk-programmable.c
index fd792b2..02f62a0 100644
--- a/drivers/clk/at91/clk-programmable.c
+++ b/drivers/clk/at91/clk-programmable.c
@@ -55,6 +55,7 @@ static irqreturn_t clk_programmable_irq_handler(int irq, void
*dev_id)
struct clk_programmable *prog = (struct clk_programmable *)dev_id;
wake_up(&prog->wait);
+ disable_irq_nosync(prog->irq);
return IRQ_HANDLED;
}
@@ -74,8 +75,10 @@ static int clk_programmable_prepare(struct clk_hw *hw)
pmc_write(pmc, AT91_PMC_PCKR(id), tmp);
- while (!(pmc_read(pmc, AT91_PMC_SR) & mask))
+ while (!(pmc_read(pmc, AT91_PMC_SR) & mask)) {
+ enable_irq(prog->irq);
wait_event(prog->wait, pmc_read(pmc, AT91_PMC_SR) & mask);
+ }
return 0;
}
--
1.7.9.5
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