i2c: core/pxa: Add support for hardware lock
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Cover letter [PATCH-RESEND 0/3] i2c: core/pxa: Add support for hardware lock
Quoted 5 lines · Vaibhav Hiremath
To justify the need for hardware lock, lets take a real usecase scenario -
In case of Marvell SoC, PXA910 silicon, both AP and CP are present and these two ARM cores are sharing one pair of I2C pins.
Quoted 8 lines
In order to keep I2C transaction operated with atomic, hardware lock (RIPC) is required.
This patch extends support for atomic operation by adding hardware lock support to the i2c-core.
PATCH[1/3] : Core changes for hardware lock
PATCH[2/3 & 3/3] : hardware lock support to i2c-pxa bus driver.
Why don't you use the hwspinlock subsystem?
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