| Message ID | 1cae6f73264ab313205eaa9483251f7aaf259cb4.1706182805.git.u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | pwm: Improve lifetime tracking for pwm_chips | expand |
On 1/25/24 04:08, Uwe Kleine-König wrote: > Currently a pwm_chip stores in its struct device *dev member a pointer > to the parent device. Preparing a change that embeds a full struct > device in struct pwm_chip, this accessor macro should be used in all > drivers directly accessing chip->dev now. This way struct pwm_chip and > this macro can be changed without having to touch all drivers in the > same change set. > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Nit: this is not a macro but an inline function.
On Thu, Jan 25, 2024 at 11:32:47AM -0800, Florian Fainelli wrote: > On 1/25/24 04:08, Uwe Kleine-König wrote: > > Currently a pwm_chip stores in its struct device *dev member a pointer > > to the parent device. Preparing a change that embeds a full struct > > device in struct pwm_chip, this accessor macro should be used in all > > drivers directly accessing chip->dev now. This way struct pwm_chip and > > this macro can be changed without having to touch all drivers in the > > same change set. > > > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > > Nit: this is not a macro but an inline function. Oh right, it used to be a macro, but I changed that. I made the commit log read: pwm: Provide an inline function to get the parent device of a given chip Currently a pwm_chip stores in its struct device *dev member a pointer to the parent device. Preparing a change that embeds a full struct device in struct pwm_chip, this accessor function should be used in all drivers directly accessing chip->dev now. This way struct pwm_chip and this new function can be changed without having to touch all drivers in the same change set. Thanks, Uwe
On Thu, Jan 25, 2024 at 09:29:37PM +0100, Uwe Kleine-König wrote: > On Thu, Jan 25, 2024 at 11:32:47AM -0800, Florian Fainelli wrote: > > On 1/25/24 04:08, Uwe Kleine-König wrote: > > > Currently a pwm_chip stores in its struct device *dev member a pointer > > > to the parent device. Preparing a change that embeds a full struct > > > device in struct pwm_chip, this accessor macro should be used in all > > > drivers directly accessing chip->dev now. This way struct pwm_chip and > > > this macro can be changed without having to touch all drivers in the > > > same change set. > > > > > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > > > > Nit: this is not a macro but an inline function. > > Oh right, it used to be a macro, but I changed that. I made the commit > log read: > > pwm: Provide an inline function to get the parent device of a given chip > > Currently a pwm_chip stores in its struct device *dev member a pointer > to the parent device. Preparing a change that embeds a full struct > device in struct pwm_chip, this accessor function should be used in all > drivers directly accessing chip->dev now. This way struct pwm_chip and > this new function can be changed without having to touch all drivers in > the same change set. While looking into further feedback, I noticed I did the same mistake in all the patches that convert the drivers to use this function. I did git filter-branch --msg-filter 'sed "s/Make use of pwmchip_parent() macro/Make use of pwmchip_parent() accessor/; s/commit as struct pwm_chip::dev, use the macro/commit as struct pwm_chip::dev, use the accessor/; s/provided for exactly this purpose./function provided for exactly this purpose./"' linus/master.. on my branch to make the typical commit log read: pwm: atmel: Make use of pwmchip_parent() accessor struct pwm_chip::dev is about to change. To not have to touch this driver in the same commit as struct pwm_chip::dev, use the accessor function provided for exactly this purpose. I wont resend the whole series if this is the only change to it. Best regards Uwe
diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 8ffe9ae7a23a..d7966918f301 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -289,6 +289,11 @@ struct pwm_chip { struct pwm_device *pwms; }; +static inline struct device *pwmchip_parent(struct pwm_chip *chip) +{ + return chip->dev; +} + #if IS_ENABLED(CONFIG_PWM) /* PWM user APIs */ int pwm_apply_might_sleep(struct pwm_device *pwm, const struct pwm_state *state);
Currently a pwm_chip stores in its struct device *dev member a pointer to the parent device. Preparing a change that embeds a full struct device in struct pwm_chip, this accessor macro should be used in all drivers directly accessing chip->dev now. This way struct pwm_chip and this macro can be changed without having to touch all drivers in the same change set. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> --- include/linux/pwm.h | 5 +++++ 1 file changed, 5 insertions(+)