diff options
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-intel.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c index 7283203861ae..9f3361c13ded 100644 --- a/drivers/pinctrl/intel/pinctrl-intel.c +++ b/drivers/pinctrl/intel/pinctrl-intel.c @@ -1493,8 +1493,13 @@ static int intel_pinctrl_probe(struct platform_device *pdev, if (IS_ERR(regs)) return PTR_ERR(regs); - /* Determine community features based on the revision */ + /* + * Determine community features based on the revision. + * A value of all ones means the device is not present. + */ value = readl(regs + REVID); + if (value == ~0u) + return -ENODEV; if (((value & REVID_MASK) >> REVID_SHIFT) >= 0x94) { community->features |= PINCTRL_FEATURE_DEBOUNCE; community->features |= PINCTRL_FEATURE_1K_PD; |