[PATCH 2/3] i2c: owl: Add support for atomic transfers
cristian.ciocaltea at gmail.com
Mon Oct 12 02:07:53 PDT 2020
On Sun, Oct 11, 2020 at 07:39:20PM +0530, Manivannan Sadhasivam wrote:
> On Fri, Oct 09, 2020 at 12:44:40AM +0300, Cristian Ciocaltea wrote:
> > Atomic transfers are required to properly power off a machine through
> > an I2C controlled PMIC, such as the Actions Semi ATC260x series.
> > System shutdown may happen with interrupts being disabled and, as a
> > consequence, the kernel may hang if the driver does not support atomic
> > transfers.
> > This functionality is essentially implemented by polling the FIFO
> > Status register until either Command Execute Completed or NACK Error
> > bits are set.
> > Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea at gmail.com>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
Thanks for reviewing,
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