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path: root/drivers/mfd/sm501.c
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Diffstat (limited to 'drivers/mfd/sm501.c')
-rw-r--r--drivers/mfd/sm501.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index 4c4412e0de24..3a0ecfc404e9 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -813,6 +813,9 @@ static DEVICE_ATTR(dbg_regs, 0666, sm501_dbg_regs, NULL);
/* sm501_init_reg
*
* Helper function for the init code to setup a register
+ *
+ * clear the bits which are set in r->mask, and then set
+ * the bits set in r->set.
*/
static inline void sm501_init_reg(struct sm501_devdata *sm,
@@ -822,8 +825,8 @@ static inline void sm501_init_reg(struct sm501_devdata *sm,
unsigned long tmp;
tmp = readl(sm->regs + reg);
- tmp |= r->set;
tmp &= ~r->mask;
+ tmp |= r->set;
writel(tmp, sm->regs + reg);
}