how to perform i2c transaction with disabled irq?
Tomek The Messenger
tomekthemessenger at gmail.com
Thu Apr 30 07:11:06 EDT 2020
If I don't have disabled irqs I can use API i2c_smbus_write_byte in order
to perform i2c transaction.
But how to make i2c transaction if I have disabled irq? Is any built-in
function which lets such operation, where there is some polling implemented?
The background is that I do i2c transaction in restart handler (some i2c
transaction to hot swap controller) in order to reset board. And linux
before entering restart handler list disable interrupts. There is a
function to enable back interrupts but in company in which I am working
engineers reviewed it and said "it is not allowed, restart must be
performed when interrupts are disabled".
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