diff options
Diffstat (limited to 'drivers/mfd/stmpe.c')
| -rw-r--r-- | drivers/mfd/stmpe.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c index 2dd8d49cb30..6b8f9417c00 100644 --- a/drivers/mfd/stmpe.c +++ b/drivers/mfd/stmpe.c @@ -772,7 +772,7 @@ static irqreturn_t stmpe_irq(int irq, void *data) ret = stmpe_block_read(stmpe, israddr, num, isr); if (ret < 0) return IRQ_NONE; - +back: for (i = 0; i < num; i++) { int bank = num - i - 1; u8 status = isr[i]; @@ -794,6 +794,22 @@ static irqreturn_t stmpe_irq(int irq, void *data) stmpe_reg_write(stmpe, israddr + i, clear); } + /* + It may happen that on the first status read interrupt + sources may not showup, so read one more time. + */ + ret = stmpe_block_read(stmpe, israddr, num, isr); + if (ret >= 0) { + for (i = 0; i < num; i++) { + int bank = num - i - 1; + u8 status = isr[i]; + + status &= stmpe->ier[bank]; + if (status) + goto back; + } + } + return IRQ_HANDLED; } |