[PATCH v2 1/2] misc: Add clock control logic into Aspeed LPC SNOOP driver
arnd at kernel.org
Wed Dec 9 01:41:41 EST 2020
On Wed, Dec 9, 2020 at 3:17 AM Joel Stanley <joel at jms.id.au> wrote:
> On Tue, 8 Dec 2020 at 09:17, John Wang <wangzhiqiang.bj at bytedance.com> wrote:
> > From: Jae Hyun Yoo <jae.hyun.yoo at intel.com>
> > If LPC SNOOP driver is registered ahead of lpc-ctrl module, LPC
> > SNOOP block will be enabled without heart beating of LCLK until
> > lpc-ctrl enables the LCLK. This issue causes improper handling on
> > host interrupts when the host sends interrupt in that time frame.
> > Then kernel eventually forcibly disables the interrupt with
> > dumping stack and printing a 'nobody cared this irq' message out.
> > To prevent this issue, all LPC sub-nodes should enable LCLK
> > individually so this patch adds clock control logic into the LPC
> > SNOOP driver.
> > Fixes: 3772e5da4454 ("drivers/misc: Aspeed LPC snoop output using misc
> > chardev")
> > Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo at intel.com>
> > Signed-off-by: Vernon Mauery <vernon.mauery at linux.intel.com>
> > Signed-off-by: John Wang <wangzhiqiang.bj at bytedance.com>
> Reviewed-by: Joel Stanley <joel at jms.id.au>
> Arnd, can you merge this for v5.11, or would you prefer me to do a pull request?
> The device tree patch from this series also needs to be added.
Sure, please forward the patches to soc at kernel.org so I can
grab them from patchwork.
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