2022-10-24 07:45:08

by Wayne Chang

[permalink] [raw]
Subject: [PATCH 06/11] usb: typec: ucsi_ccg: Replace ccgx to well-known regex

ccgx is refer to the cypress cypd4226 typec controller.
Replace ccgx to well-known regex "cypress".

Signed-off-by: Wayne Chang <[email protected]>
---
drivers/usb/typec/ucsi/ucsi_ccg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
index 139707a2f3d6..5d3099e6eb77 100644
--- a/drivers/usb/typec/ucsi/ucsi_ccg.c
+++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
@@ -1358,7 +1358,7 @@ static int ucsi_ccg_probe(struct i2c_client *client,
INIT_WORK(&uc->pm_work, ccg_pm_workaround_work);

/* Only fail FW flashing when FW build information is not provided */
- status = device_property_read_u16(dev, "ccgx,firmware-build",
+ status = device_property_read_u16(dev, "cypress,firmware-build",
&uc->fw_build);
if (status)
dev_err(uc->dev, "failed to get FW build information\n");
--
2.25.1


2022-10-24 08:16:18

by Heikki Krogerus

[permalink] [raw]
Subject: Re: [PATCH 06/11] usb: typec: ucsi_ccg: Replace ccgx to well-known regex

On Mon, Oct 24, 2022 at 03:41:23PM +0800, Wayne Chang wrote:
> ccgx is refer to the cypress cypd4226 typec controller.
> Replace ccgx to well-known regex "cypress".
>
> Signed-off-by: Wayne Chang <[email protected]>
> ---
> drivers/usb/typec/ucsi/ucsi_ccg.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
> index 139707a2f3d6..5d3099e6eb77 100644
> --- a/drivers/usb/typec/ucsi/ucsi_ccg.c
> +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
> @@ -1358,7 +1358,7 @@ static int ucsi_ccg_probe(struct i2c_client *client,
> INIT_WORK(&uc->pm_work, ccg_pm_workaround_work);
>
> /* Only fail FW flashing when FW build information is not provided */
> - status = device_property_read_u16(dev, "ccgx,firmware-build",
> + status = device_property_read_u16(dev, "cypress,firmware-build",
> &uc->fw_build);
> if (status)
> dev_err(uc->dev, "failed to get FW build information\n");

This will break bisectability. You need to first add that
"cyppress,firmware-build" identifier without removing the old
"ccgx,firmware-build" identifier, and then introduce a separate
clean-up patch where you remove it when it's safe to remove:

1. Add new - This patch.
2. Modify users - PATCH 7/11.
3. Remove old - *missing*.

thanks,

--
heikki

2022-10-24 09:03:51

by Heikki Krogerus

[permalink] [raw]
Subject: Re: [PATCH 06/11] usb: typec: ucsi_ccg: Replace ccgx to well-known regex

On Mon, Oct 24, 2022 at 11:29:27AM +0300, Felipe Balbi wrote:
> Heikki Krogerus <[email protected]> writes:
>
> > On Mon, Oct 24, 2022 at 03:41:23PM +0800, Wayne Chang wrote:
> >> ccgx is refer to the cypress cypd4226 typec controller.
> >> Replace ccgx to well-known regex "cypress".
> >>
> >> Signed-off-by: Wayne Chang <[email protected]>
> >> ---
> >> drivers/usb/typec/ucsi/ucsi_ccg.c | 2 +-
> >> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
> >> index 139707a2f3d6..5d3099e6eb77 100644
> >> --- a/drivers/usb/typec/ucsi/ucsi_ccg.c
> >> +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
> >> @@ -1358,7 +1358,7 @@ static int ucsi_ccg_probe(struct i2c_client *client,
> >> INIT_WORK(&uc->pm_work, ccg_pm_workaround_work);
> >>
> >> /* Only fail FW flashing when FW build information is not provided */
> >> - status = device_property_read_u16(dev, "ccgx,firmware-build",
> >> + status = device_property_read_u16(dev, "cypress,firmware-build",
> >> &uc->fw_build);
> >> if (status)
> >> dev_err(uc->dev, "failed to get FW build information\n");
> >
> > This will break bisectability. You need to first add that
> > "cyppress,firmware-build" identifier without removing the old
> > "ccgx,firmware-build" identifier, and then introduce a separate
> > clean-up patch where you remove it when it's safe to remove:
> >
> > 1. Add new - This patch.
> > 2. Modify users - PATCH 7/11.
> > 3. Remove old - *missing*.
>
> will it ever be safe to remove? What about potential products in the
> market with little to no upgrade path? There are likely to be products
> with a DTB that will never be updated, no?

Not the case here. OF support is only just added to this driver in
this series. That old identifier has been used as a build-in property
only.

thanks,

--
heikki

2022-10-24 09:24:09

by Felipe Balbi

[permalink] [raw]
Subject: Re: [PATCH 06/11] usb: typec: ucsi_ccg: Replace ccgx to well-known regex

Heikki Krogerus <[email protected]> writes:

> On Mon, Oct 24, 2022 at 03:41:23PM +0800, Wayne Chang wrote:
>> ccgx is refer to the cypress cypd4226 typec controller.
>> Replace ccgx to well-known regex "cypress".
>>
>> Signed-off-by: Wayne Chang <[email protected]>
>> ---
>> drivers/usb/typec/ucsi/ucsi_ccg.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
>> index 139707a2f3d6..5d3099e6eb77 100644
>> --- a/drivers/usb/typec/ucsi/ucsi_ccg.c
>> +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
>> @@ -1358,7 +1358,7 @@ static int ucsi_ccg_probe(struct i2c_client *client,
>> INIT_WORK(&uc->pm_work, ccg_pm_workaround_work);
>>
>> /* Only fail FW flashing when FW build information is not provided */
>> - status = device_property_read_u16(dev, "ccgx,firmware-build",
>> + status = device_property_read_u16(dev, "cypress,firmware-build",
>> &uc->fw_build);
>> if (status)
>> dev_err(uc->dev, "failed to get FW build information\n");
>
> This will break bisectability. You need to first add that
> "cyppress,firmware-build" identifier without removing the old
> "ccgx,firmware-build" identifier, and then introduce a separate
> clean-up patch where you remove it when it's safe to remove:
>
> 1. Add new - This patch.
> 2. Modify users - PATCH 7/11.
> 3. Remove old - *missing*.

will it ever be safe to remove? What about potential products in the
market with little to no upgrade path? There are likely to be products
with a DTB that will never be updated, no?

--
balbi


Attachments:
signature.asc (873.00 B)

2022-10-25 09:02:26

by Wayne Chang

[permalink] [raw]
Subject: Re: [PATCH 06/11] usb: typec: ucsi_ccg: Replace ccgx to well-known regex

Thanks for the review.

On 10/24/22 16:46, Heikki Krogerus wrote:
> External email: Use caution opening links or attachments
>
>
> On Mon, Oct 24, 2022 at 11:29:27AM +0300, Felipe Balbi wrote:
>> Heikki Krogerus <[email protected]> writes:
>>
>>> On Mon, Oct 24, 2022 at 03:41:23PM +0800, Wayne Chang wrote:
>>>> ccgx is refer to the cypress cypd4226 typec controller.
>>>> Replace ccgx to well-known regex "cypress".
>>>>
>>>> Signed-off-by: Wayne Chang <[email protected]>
>>>> ---
>>>> drivers/usb/typec/ucsi/ucsi_ccg.c | 2 +-
>>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
>>>> index 139707a2f3d6..5d3099e6eb77 100644
>>>> --- a/drivers/usb/typec/ucsi/ucsi_ccg.c
>>>> +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
>>>> @@ -1358,7 +1358,7 @@ static int ucsi_ccg_probe(struct i2c_client *client,
>>>> INIT_WORK(&uc->pm_work, ccg_pm_workaround_work);
>>>>
>>>> /* Only fail FW flashing when FW build information is not provided */
>>>> - status = device_property_read_u16(dev, "ccgx,firmware-build",
>>>> + status = device_property_read_u16(dev, "cypress,firmware-build",
>>>> &uc->fw_build);
>>>> if (status)
>>>> dev_err(uc->dev, "failed to get FW build information\n");
>>>
>>> This will break bisectability. You need to first add that
>>> "cyppress,firmware-build" identifier without removing the old
>>> "ccgx,firmware-build" identifier, and then introduce a separate
>>> clean-up patch where you remove it when it's safe to remove:
>>>
>>> 1. Add new - This patch.
>>> 2. Modify users - PATCH 7/11.
>>> 3. Remove old - *missing*.
>>

thanks for the guidance.
will update the changes in the next patchset.

thanks,
Wayne.

>> will it ever be safe to remove? What about potential products in the
>> market with little to no upgrade path? There are likely to be products
>> with a DTB that will never be updated, no?
>
> Not the case here. OF support is only just added to this driver in
> this series. That old identifier has been used as a build-in property
> only.
>
> thanks,
>
> --
> heikki
>