[PATCH-RESEND 0/3] i2c: core/pxa: Add support for hardware lock

Wolfram Sang wsa at the-dreams.de
Sun Oct 25 02:52:00 PDT 2015

On Wed, Jun 03, 2015 at 12:15:28AM +0530, Vaibhav Hiremath wrote:
> 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.
> 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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