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w1: ds1wm: silence interrupts on HW before claiming the interrupt

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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>
This commit is contained in:
Johannes Poehlmann 2017-07-25 13:27:14 +02:00 committed by Greg Kroah-Hartman
parent c3248f0ee0
commit 1d925f45d8
1 changed files with 6 additions and 0 deletions
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6
drivers/w1/masters/ds1wm.c
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@ -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)