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mfd: stmfx: Disable IRQ in suspend to avoid spurious interrupt 

When STMFX supply is stopped, spurious interrupt can occur. To avoid that,
disable the interrupt in suspend before disabling the regulator and
re-enable it at the end of resume.

Fixes: 06252ade91 ("mfd: Add ST Multi-Function eXpander (STMFX) core driver")
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Amelie Delaunay 2020-04-22 11:08:33 +02:00 committed by Lee Jones
parent 60c2c4bcb9
commit 97eda5dcc2
2 changed files with 7 additions and 0 deletions
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6
drivers/mfd/stmfx.c
View File

@ -296,6 +296,8 @@ static int stmfx_irq_init(struct i2c_client *client)
if (ret)
goto irq_exit;
stmfx->irq = client->irq;
return 0;
irq_exit:
@ -486,6 +488,8 @@ static int stmfx_suspend(struct device *dev)
if (ret)
return ret;
disable_irq(stmfx->irq);
if (stmfx->vdd)
return regulator_disable(stmfx->vdd);
@ -529,6 +533,8 @@ static int stmfx_resume(struct device *dev)
if (ret)
return ret;
enable_irq(stmfx->irq);
return 0;
}
#endif

1
include/linux/mfd/stmfx.h
View File

@ -109,6 +109,7 @@ struct stmfx {
struct device *dev;
struct regmap *map;
struct regulator *vdd;
int irq;
struct irq_domain *irq_domain;
struct mutex lock; /* IRQ bus lock */
u8 irq_src;