Re: [PATCH v8 3/3] i2c-ocores: sifive: add polling mode workaround for FU540-C000 SoC.
From: Sagar Kadam
Date: Wed May 29 2019 - 23:59:01 EST
On Wed, May 29, 2019 at 9:23 PM Andrew Lunn <andrew@xxxxxxx> wrote:
> On Wed, May 29, 2019 at 09:57:27AM +0530, Sagar Shrikant Kadam wrote:
> > The i2c-ocore driver already has a polling mode interface.But it needs
> > a workaround for FU540 Chipset on HiFive unleashed board (RevA00).
> > There is an erratum in FU540 chip that prevents interrupt driven i2c
> > transfers from working, and also the I2C controller's interrupt bit
> > cannot be cleared if set, due to this the existing i2c polling mode
> > interface added in mainline earlier doesn't work, and CPU stall's
> > infinitely, when-ever i2c transfer is initiated.
> > Ref:
> > commit dd7dbf0eb090 ("i2c: ocores: refactor setup for polling")
> > The workaround / fix under OCORES_FLAG_BROKEN_IRQ is particularly for
> > FU540-COOO SoC.
> > The polling function identifies a SiFive device based on the device node
> > and enables the workaround.
> > Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@xxxxxxxxxx>
> Hi Sagar
> When you repost, you are supposed to add any reviewed-by, or acked-by
> tags you received.
Sorry Andrew, I missed it.
I will repost it, with acked by Andrew Lunn as you had Acknowledged it earlier