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| author | Johannes Poehlmann <johannes.poehlmann@izt-labs.de> | 2017-07-25 13:27:14 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-28 17:20:01 +0200 |
| commit | 1d925f45d8301f6bf6a66d31fcd30b9580479c93 (patch) | |
| tree | 78a3bc0d7e76dc3298804fee472daf20066fe56e /drivers/w1 | |
| parent | c3248f0ee0615f7f43d3ad0f27006854b2bd325f (diff) | |
| download | linux-stable-1d925f45d8301f6bf6a66d31fcd30b9580479c93.tar.gz linux-stable-1d925f45d8301f6bf6a66d31fcd30b9580479c93.tar.bz2 linux-stable-1d925f45d8301f6bf6a66d31fcd30b9580479c93.zip | |
w1: ds1wm: silence interrupts on HW before claiming the interrupt
w1: ds1wm: silence interrupts on HW before claiming the interrupt.
This way avoid possible invalid interrupts in the initialization phase.
Signed-off-by: Johannes Poehlmann <johannes.poehlmann@izt-labs.de>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/w1')
| -rw-r--r-- | drivers/w1/masters/ds1wm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/w1/masters/ds1wm.c b/drivers/w1/masters/ds1wm.c index f8a3ba004c09..53143797d71a 100644 --- a/drivers/w1/masters/ds1wm.c +++ b/drivers/w1/masters/ds1wm.c @@ -509,6 +509,7 @@ static int ds1wm_probe(struct platform_device *pdev) struct ds1wm_driver_data *plat; struct resource *res; int ret; + u8 inten; if (!pdev) return -ENODEV; @@ -562,6 +563,11 @@ static int ds1wm_probe(struct platform_device *pdev) ds1wm_data->int_en_reg_none = (plat->active_high ? DS1WM_INTEN_IAS : 0); ds1wm_data->reset_recover_delay = plat->reset_recover_delay; + /* Mask interrupts, set IAS before claiming interrupt */ + inten = ds1wm_read_register(ds1wm_data, DS1WM_INT_EN); + ds1wm_write_register(ds1wm_data, + DS1WM_INT_EN, ds1wm_data->int_en_reg_none); + if (res->flags & IORESOURCE_IRQ_HIGHEDGE) irq_set_irq_type(ds1wm_data->irq, IRQ_TYPE_EDGE_RISING); if (res->flags & IORESOURCE_IRQ_LOWEDGE) |