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6affdda171
IIC1_PMUX is a single bit field at RCWSR14 bit 10, so the mask for the
two iic1 pinmux nodes was narrowed from 0x7 to 0x1 to avoid writing the
two reserved bits next to it.
With pinctrl-single,bit-per-mux the driver does not take the supplied
mask as the bits to modify. It derives the field from the node's
pinctrl-single,function-mask, which is 0x7 here, and then requires the
supplied mask to match it exactly:
bit_pos = __ffs(mask); /* 10 */
mask_pos = ((pcs->fmask) << bit_pos); /* 0x7 << 10 = 0x1c00 */
submask = mask & mask_pos; /* 0x400 */
...
if (submask != mask_pos) {
dev_warn(pcs->dev,
"Invalid submask 0x%x for %pOFn at 0x%x\n",
submask, np, offset);
continue;
}
A one bit mask gives submask 0x400 against mask_pos 0x1c00, so both
nodes are rejected and the pins are never muxed with this message:
pinctrl-single 70010012c.pinmux: Invalid submask 0x400 for iic1-i2c-pins
pinctrl-single 70010012c.pinmux: Invalid submask 0x400 for iic1-gpio-pins
The values are not changed:
- 0x0 selects IIC1
- 0x1 << 10 selects GPIO_1[3:2].
Fixes:
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