| Message ID | 1459368249-13241-37-git-send-email-boris.brezillon@free-electrons.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
Hi Boris, On Wed, Mar 30, 2016 at 10:03:59PM +0200, Boris Brezillon wrote: > pwm_config/enable/disable() have been deprecated and should be replaced > by pwm_apply_state(). > > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> > --- > drivers/input/misc/max77693-haptic.c | 23 +++++++++++++++++------ > 1 file changed, 17 insertions(+), 6 deletions(-) > > diff --git a/drivers/input/misc/max77693-haptic.c b/drivers/input/misc/max77693-haptic.c > index cf6aac0..aef7dc4 100644 > --- a/drivers/input/misc/max77693-haptic.c > +++ b/drivers/input/misc/max77693-haptic.c > @@ -70,13 +70,16 @@ struct max77693_haptic { > > static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic) > { > + struct pwm_state pstate; > struct pwm_args pargs = { }; > - int delta; > int error; > > pwm_get_args(haptic->pwm_dev, &pargs); > - delta = (pargs.period + haptic->pwm_duty) / 2; > - error = pwm_config(haptic->pwm_dev, delta, pargs.period); > + pwm_get_state(haptic->pwm_dev, &pstate); > + > + pstate.period = pargs.period; > + pstate.duty_cycle = (pargs.period + haptic->pwm_duty) / 2; > + error = pwm_apply_state(haptic->pwm_dev, &pstate); This does not make sense with regard to the atomic API. If you look in max77693_haptic_play_work(), right after calling max77693_haptic_set_duty_cycle() we either try to enable or disable the pwm. When switching to this new API we should combine both actions. > if (error) { > dev_err(haptic->dev, "failed to configure pwm: %d\n", error); > return error; > @@ -161,12 +164,16 @@ static int max77693_haptic_lowsys(struct max77693_haptic *haptic, bool enable) > > static void max77693_haptic_enable(struct max77693_haptic *haptic) > { > + struct pwm_state pstate; > int error; > > if (haptic->enabled) > return; > > - error = pwm_enable(haptic->pwm_dev); > + pwm_get_state(haptic->pwm_dev, &pstate); > + pstate.enabled = true; > + > + error = pwm_apply_state(haptic->pwm_dev, &pstate); As I mentioned I'd rather we did not deprecate pwm_enable() and pwm_disable() (and maybe others), as it forces us to add unnecessary boilerplate code to the drivers. > if (error) { > dev_err(haptic->dev, > "failed to enable haptic pwm device: %d\n", error); > @@ -188,11 +195,13 @@ static void max77693_haptic_enable(struct max77693_haptic *haptic) > err_enable_config: > max77693_haptic_lowsys(haptic, false); > err_enable_lowsys: > - pwm_disable(haptic->pwm_dev); > + pstate.enabled = false; > + pwm_apply_state(haptic->pwm_dev, &pstate); > } > > static void max77693_haptic_disable(struct max77693_haptic *haptic) > { > + struct pwm_state pstate; > int error; > > if (!haptic->enabled) > @@ -206,7 +215,9 @@ static void max77693_haptic_disable(struct max77693_haptic *haptic) > if (error) > goto err_disable_lowsys; > > - pwm_disable(haptic->pwm_dev); > + pwm_get_state(haptic->pwm_dev, &pstate); > + pstate.enabled = false; > + pwm_apply_state(haptic->pwm_dev, &pstate); Same here. > haptic->enabled = false; > > return; > -- > 2.5.0 > Thanks.
On Thu, 31 Mar 2016 10:48:01 -0700 Dmitry Torokhov <dmitry.torokhov@gmail.com> wrote: > Hi Boris, > > On Wed, Mar 30, 2016 at 10:03:59PM +0200, Boris Brezillon wrote: > > pwm_config/enable/disable() have been deprecated and should be replaced > > by pwm_apply_state(). > > > > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> > > --- > > drivers/input/misc/max77693-haptic.c | 23 +++++++++++++++++------ > > 1 file changed, 17 insertions(+), 6 deletions(-) > > > > diff --git a/drivers/input/misc/max77693-haptic.c b/drivers/input/misc/max77693-haptic.c > > index cf6aac0..aef7dc4 100644 > > --- a/drivers/input/misc/max77693-haptic.c > > +++ b/drivers/input/misc/max77693-haptic.c > > @@ -70,13 +70,16 @@ struct max77693_haptic { > > > > static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic) > > { > > + struct pwm_state pstate; > > struct pwm_args pargs = { }; > > - int delta; > > int error; > > > > pwm_get_args(haptic->pwm_dev, &pargs); > > - delta = (pargs.period + haptic->pwm_duty) / 2; > > - error = pwm_config(haptic->pwm_dev, delta, pargs.period); > > + pwm_get_state(haptic->pwm_dev, &pstate); > > + > > + pstate.period = pargs.period; > > + pstate.duty_cycle = (pargs.period + haptic->pwm_duty) / 2; > > + error = pwm_apply_state(haptic->pwm_dev, &pstate); > > This does not make sense with regard to the atomic API. If you look in > max77693_haptic_play_work(), right after calling > max77693_haptic_set_duty_cycle() we either try to enable or disable the > pwm. When switching to this new API we should combine both actions. True. I'll address that, unless Thierry is fine keeping the non-atomic API, in which case I'll just drop patches 32 to 46. > > > if (error) { > > dev_err(haptic->dev, "failed to configure pwm: %d\n", error); > > return error; > > @@ -161,12 +164,16 @@ static int max77693_haptic_lowsys(struct max77693_haptic *haptic, bool enable) > > > > static void max77693_haptic_enable(struct max77693_haptic *haptic) > > { > > + struct pwm_state pstate; > > int error; > > > > if (haptic->enabled) > > return; > > > > - error = pwm_enable(haptic->pwm_dev); > > + pwm_get_state(haptic->pwm_dev, &pstate); > > + pstate.enabled = true; > > + > > + error = pwm_apply_state(haptic->pwm_dev, &pstate); > > As I mentioned I'd rather we did not deprecate pwm_enable() and > pwm_disable() (and maybe others), as it forces us to add unnecessary > boilerplate code to the drivers. > > > if (error) { > > dev_err(haptic->dev, > > "failed to enable haptic pwm device: %d\n", error); > > @@ -188,11 +195,13 @@ static void max77693_haptic_enable(struct max77693_haptic *haptic) > > err_enable_config: > > max77693_haptic_lowsys(haptic, false); > > err_enable_lowsys: > > - pwm_disable(haptic->pwm_dev); > > + pstate.enabled = false; > > + pwm_apply_state(haptic->pwm_dev, &pstate); > > } > > > > static void max77693_haptic_disable(struct max77693_haptic *haptic) > > { > > + struct pwm_state pstate; > > int error; > > > > if (!haptic->enabled) > > @@ -206,7 +215,9 @@ static void max77693_haptic_disable(struct max77693_haptic *haptic) > > if (error) > > goto err_disable_lowsys; > > > > - pwm_disable(haptic->pwm_dev); > > + pwm_get_state(haptic->pwm_dev, &pstate); > > + pstate.enabled = false; > > + pwm_apply_state(haptic->pwm_dev, &pstate); > > Same here. > > > haptic->enabled = false; > > > > return; > > -- > > 2.5.0 > > > > Thanks. >
On Thu, Mar 31, 2016 at 08:57:18PM +0200, Boris Brezillon wrote: > On Thu, 31 Mar 2016 10:48:01 -0700 > Dmitry Torokhov <dmitry.torokhov@gmail.com> wrote: > > > Hi Boris, > > > > On Wed, Mar 30, 2016 at 10:03:59PM +0200, Boris Brezillon wrote: > > > pwm_config/enable/disable() have been deprecated and should be replaced > > > by pwm_apply_state(). > > > > > > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> > > > --- > > > drivers/input/misc/max77693-haptic.c | 23 +++++++++++++++++------ > > > 1 file changed, 17 insertions(+), 6 deletions(-) > > > > > > diff --git a/drivers/input/misc/max77693-haptic.c b/drivers/input/misc/max77693-haptic.c > > > index cf6aac0..aef7dc4 100644 > > > --- a/drivers/input/misc/max77693-haptic.c > > > +++ b/drivers/input/misc/max77693-haptic.c > > > @@ -70,13 +70,16 @@ struct max77693_haptic { > > > > > > static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic) > > > { > > > + struct pwm_state pstate; > > > struct pwm_args pargs = { }; > > > - int delta; > > > int error; > > > > > > pwm_get_args(haptic->pwm_dev, &pargs); > > > - delta = (pargs.period + haptic->pwm_duty) / 2; > > > - error = pwm_config(haptic->pwm_dev, delta, pargs.period); > > > + pwm_get_state(haptic->pwm_dev, &pstate); > > > + > > > + pstate.period = pargs.period; > > > + pstate.duty_cycle = (pargs.period + haptic->pwm_duty) / 2; > > > + error = pwm_apply_state(haptic->pwm_dev, &pstate); > > > > This does not make sense with regard to the atomic API. If you look in > > max77693_haptic_play_work(), right after calling > > max77693_haptic_set_duty_cycle() we either try to enable or disable the > > pwm. When switching to this new API we should combine both actions. > > True. I'll address that, unless Thierry is fine keeping the non-atomic > API, in which case I'll just drop patches 32 to 46. I'm fine with keeping the pwm_enable(), pwm_disable() and pwm_config() APIs, but they should only be used as shortcuts. Where possible the new atomic API should be used to combine multiple operations into one. Thierry
diff --git a/drivers/input/misc/max77693-haptic.c b/drivers/input/misc/max77693-haptic.c index cf6aac0..aef7dc4 100644 --- a/drivers/input/misc/max77693-haptic.c +++ b/drivers/input/misc/max77693-haptic.c @@ -70,13 +70,16 @@ struct max77693_haptic { static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic) { + struct pwm_state pstate; struct pwm_args pargs = { }; - int delta; int error; pwm_get_args(haptic->pwm_dev, &pargs); - delta = (pargs.period + haptic->pwm_duty) / 2; - error = pwm_config(haptic->pwm_dev, delta, pargs.period); + pwm_get_state(haptic->pwm_dev, &pstate); + + pstate.period = pargs.period; + pstate.duty_cycle = (pargs.period + haptic->pwm_duty) / 2; + error = pwm_apply_state(haptic->pwm_dev, &pstate); if (error) { dev_err(haptic->dev, "failed to configure pwm: %d\n", error); return error; @@ -161,12 +164,16 @@ static int max77693_haptic_lowsys(struct max77693_haptic *haptic, bool enable) static void max77693_haptic_enable(struct max77693_haptic *haptic) { + struct pwm_state pstate; int error; if (haptic->enabled) return; - error = pwm_enable(haptic->pwm_dev); + pwm_get_state(haptic->pwm_dev, &pstate); + pstate.enabled = true; + + error = pwm_apply_state(haptic->pwm_dev, &pstate); if (error) { dev_err(haptic->dev, "failed to enable haptic pwm device: %d\n", error); @@ -188,11 +195,13 @@ static void max77693_haptic_enable(struct max77693_haptic *haptic) err_enable_config: max77693_haptic_lowsys(haptic, false); err_enable_lowsys: - pwm_disable(haptic->pwm_dev); + pstate.enabled = false; + pwm_apply_state(haptic->pwm_dev, &pstate); } static void max77693_haptic_disable(struct max77693_haptic *haptic) { + struct pwm_state pstate; int error; if (!haptic->enabled) @@ -206,7 +215,9 @@ static void max77693_haptic_disable(struct max77693_haptic *haptic) if (error) goto err_disable_lowsys; - pwm_disable(haptic->pwm_dev); + pwm_get_state(haptic->pwm_dev, &pstate); + pstate.enabled = false; + pwm_apply_state(haptic->pwm_dev, &pstate); haptic->enabled = false; return;
pwm_config/enable/disable() have been deprecated and should be replaced by pwm_apply_state(). Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> --- drivers/input/misc/max77693-haptic.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-)