From 1d925f45d8301f6bf6a66d31fcd30b9580479c93 Mon Sep 17 00:00:00 2001 From: Johannes Poehlmann Date: Tue, 25 Jul 2017 13:27:14 +0200 Subject: [PATCH] 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 Acked-by: Evgeniy Polyakov Signed-off-by: Greg Kroah-Hartman --- drivers/w1/masters/ds1wm.c | 6 ++++++ 1 file changed, 6 insertions(+) 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)