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authorLinus Walleij <linus.walleij@linaro.org>2021-03-30 00:46:49 +0200
committerLinus Walleij <linus.walleij@linaro.org>2021-03-30 00:46:49 +0200
commitba845907b23a6584e5944f6fbffda3efb010c28b (patch)
tree6d68567c248c7f147e430109909147ffbcef4968 /drivers/pinctrl
parent58b5ada8c465b5f1300bc021ebd3d3b8149124b4 (diff)
parent39c1f1bd8adf29840ef52225ce95f390e3d7b2cf (diff)
Merge tag 'intel-pinctrl-v5.12-3' of gitolite.kernel.org:pub/scm/linux/kernel/git/pinctrl/intel into fixes
intel-pinctrl for v5.12-3 * Check if device is present, which is not the case in Xen The following is an automated git shortlog grouped by driver: intel: - check REVID register value for device presence
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/intel/pinctrl-intel.c7
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;