From: Gao Pan <[email protected]>
add debug message when i2c peripheral clk rate is 0, then
directly return -EINVAL.
Signed-off-by: Gao Pan <[email protected]>
Reviewed-by: Andy Duan <[email protected]>
---
drivers/i2c/busses/i2c-imx-lpi2c.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index e718bb6b2387..8f9dd3dd2951 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -209,7 +209,12 @@ static int lpi2c_imx_config(struct lpi2c_imx_struct *lpi2c_imx)
lpi2c_imx_set_mode(lpi2c_imx);
- clk_rate = clk_get_rate(lpi2c_imx->clk);
+ clk_rate = clk_get_rate(lpi2c_imx->clk_per);
+ if (!clk_rate) {
+ dev_dbg(&lpi2c_imx->adapter.dev, "clk_per rate is 0\n");
+ return -EINVAL;
+ }
+
if (lpi2c_imx->mode == HS || lpi2c_imx->mode == ULTRA_FAST)
filt = 0;
else
--
2.25.1
> From: Clark Wang <[email protected]>
> Sent: Wednesday, March 17, 2021 2:54 PM
>
> add debug message when i2c peripheral clk rate is 0, then directly return
> -EINVAL.
>
> Signed-off-by: Gao Pan <[email protected]>
> Reviewed-by: Andy Duan <[email protected]>
Drop old review when patch is changed
> ---
> drivers/i2c/busses/i2c-imx-lpi2c.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c
> b/drivers/i2c/busses/i2c-imx-lpi2c.c
> index e718bb6b2387..8f9dd3dd2951 100644
> --- a/drivers/i2c/busses/i2c-imx-lpi2c.c
> +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
> @@ -209,7 +209,12 @@ static int lpi2c_imx_config(struct lpi2c_imx_struct
> *lpi2c_imx)
>
> lpi2c_imx_set_mode(lpi2c_imx);
>
> - clk_rate = clk_get_rate(lpi2c_imx->clk);
I guess the kernel can't compile right before this patch because lpi2c_imx->clk was
Removed In former patch
You need double check not break bisect
> + clk_rate = clk_get_rate(lpi2c_imx->clk_per);
> + if (!clk_rate) {
> + dev_dbg(&lpi2c_imx->adapter.dev, "clk_per rate is 0\n");
s/dev_dbg/dev_err
> + return -EINVAL;
> + }
> +
> if (lpi2c_imx->mode == HS || lpi2c_imx->mode == ULTRA_FAST)
> filt = 0;
> else
> --
> 2.25.1
> -----Original Message-----
> From: Aisheng Dong <[email protected]>
> Sent: Friday, March 19, 2021 12:57
> To: Clark Wang <[email protected]>; [email protected];
> [email protected]
> Cc: [email protected]; [email protected]; dl-linux-imx <linux-
> [email protected]>; [email protected]; [email protected];
> [email protected]; [email protected]; linux-
> [email protected]
> Subject: RE: [PATCH 05/11] i2c: imx-lpi2c: add debug message when i2c
> peripheral clk doesn't work
>
> > From: Clark Wang <[email protected]>
> > Sent: Wednesday, March 17, 2021 2:54 PM
> >
> > add debug message when i2c peripheral clk rate is 0, then directly
> > return -EINVAL.
> >
> > Signed-off-by: Gao Pan <[email protected]>
> > Reviewed-by: Andy Duan <[email protected]>
>
> Drop old review when patch is changed
>
> > ---
> > drivers/i2c/busses/i2c-imx-lpi2c.c | 7 ++++++-
> > 1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c
> > b/drivers/i2c/busses/i2c-imx-lpi2c.c
> > index e718bb6b2387..8f9dd3dd2951 100644
> > --- a/drivers/i2c/busses/i2c-imx-lpi2c.c
> > +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
> > @@ -209,7 +209,12 @@ static int lpi2c_imx_config(struct
> > lpi2c_imx_struct
> > *lpi2c_imx)
> >
> > lpi2c_imx_set_mode(lpi2c_imx);
> >
> > - clk_rate = clk_get_rate(lpi2c_imx->clk);
>
> I guess the kernel can't compile right before this patch because lpi2c_imx-
> >clk was Removed In former patch You need double check not break bisect
Oh, sorry, I miss this clk definition here.
I will fix this in V2.
>
> > + clk_rate = clk_get_rate(lpi2c_imx->clk_per);
> > + if (!clk_rate) {
> > + dev_dbg(&lpi2c_imx->adapter.dev, "clk_per rate is 0\n");
>
> s/dev_dbg/dev_err
Will change to dev_err.
Thanks.
Best Regards,
Clark Wang
>
> > + return -EINVAL;
> > + }
> > +
> > if (lpi2c_imx->mode == HS || lpi2c_imx->mode == ULTRA_FAST)
> > filt = 0;
> > else
> > --
> > 2.25.1