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Merge tag 'intel-pinctrl-v5.12-3' of gitolite.kernel.org:pub/scm/linux/kernel/git/pinctrl/intel into fixes

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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
This commit is contained in:
Linus Walleij
2021-03-30 00:46:49 +02:00
parent 58b5ada8c4 39c1f1bd8a
commit ba845907b2
1 changed files with 6 additions and 1 deletions
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7
drivers/pinctrl/intel/pinctrl-intel.c
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@@ -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;