Change in coreboot[master]: qualcomm/sc7280: gpio: Support eGPIO scheme

[Shelley Chen (Code Review)]

Attention is currently required from: Ravi kumar, Taniya Das, mturney mturney, Julius Werner.
Shelley Chen has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58580 )

Change subject: qualcomm/sc7280: gpio: Support eGPIO scheme
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Patch Set 5:

(1 comment)

File src/soc/qualcomm/common/gpio.c:

https://review.coreboot.org/c/coreboot/+/58580/comment/a33616d6_13f181af 
PS2, Line 21: 	if ((read32(&regs->cfg) >> GPIO_EGPIO_SHFT) & GPIO_EGPIO_BMSK)
> I might be missing something here, but we want to set the 12th bit only in case the 11th bit (eGPIO_ […]

Would this work?

| (read32(&regs->cfg) & GPIO_EGPIO_BMSK) << GPIO_EGPIO_SHFT)

Where:

GPIO_EGPIO_BMSK = BIT(11)
GPIO_EGPIO_SHFT = 1

Basically bitwise and to see if bit 11 is set and if it is, left shift by 1 to set bit 12.  If bit 11 isn't set, the bitwise OR won't end up changing any bits.