| Message ID | 20190525181133.4875-10-martin.blumenstingl@googlemail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | pwm-meson: cleanups and improvements | expand |
On 25/05/2019 20:11, Martin Blumenstingl wrote: > All existing PWM drivers (except pwm-meson and two other ones) call > pwm_set_chip_data() from their pwm_ops.request() callback. Now that we > can access the struct meson_pwm_channel from struct meson_pwm we can do > the same. > > Move the call to pwm_set_chip_data() to meson_pwm_request() and drop the > custom meson_pwm_add_channels(). This makes the implementation > consistent with other drivers and makes it slightly more obvious > thatpwm_get_chip_data() cannot be used from pwm_ops.get_state() (because > that's called by the PWM core before pwm_ops.request()). > > No functional changes intended. > > Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> > --- > drivers/pwm/pwm-meson.c | 22 ++++++++-------------- > 1 file changed, 8 insertions(+), 14 deletions(-) > > diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c > index ac7e188155fd..27915d6475e3 100644 > --- a/drivers/pwm/pwm-meson.c > +++ b/drivers/pwm/pwm-meson.c > @@ -98,12 +98,16 @@ static inline struct meson_pwm *to_meson_pwm(struct pwm_chip *chip) > > static int meson_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) > { > - struct meson_pwm_channel *channel = pwm_get_chip_data(pwm); > + struct meson_pwm *meson = to_meson_pwm(chip); > + struct meson_pwm_channel *channel; > struct device *dev = chip->dev; > int err; > > - if (!channel) > - return -ENODEV; > + channel = pwm_get_chip_data(pwm); > + if (channel) > + return 0; > + > + channel = &meson->channels[pwm->hwpwm]; > > if (channel->clk_parent) { > err = clk_set_parent(channel->clk, channel->clk_parent); > @@ -124,7 +128,7 @@ static int meson_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) > > chip->ops->get_state(chip, pwm, &channel->state); > > - return 0; > + return pwm_set_chip_data(pwm, channel); > } > > static void meson_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) > @@ -460,14 +464,6 @@ static int meson_pwm_init_channels(struct meson_pwm *meson) > return 0; > } > > -static void meson_pwm_add_channels(struct meson_pwm *meson) > -{ > - unsigned int i; > - > - for (i = 0; i < meson->chip.npwm; i++) > - pwm_set_chip_data(&meson->chip.pwms[i], &meson->channels[i]); > -} > - > static int meson_pwm_probe(struct platform_device *pdev) > { > struct meson_pwm *meson; > @@ -503,8 +499,6 @@ static int meson_pwm_probe(struct platform_device *pdev) > return err; > } > > - meson_pwm_add_channels(meson); > - > platform_set_drvdata(pdev, meson); > > return 0; > Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c index ac7e188155fd..27915d6475e3 100644 --- a/drivers/pwm/pwm-meson.c +++ b/drivers/pwm/pwm-meson.c @@ -98,12 +98,16 @@ static inline struct meson_pwm *to_meson_pwm(struct pwm_chip *chip) static int meson_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) { - struct meson_pwm_channel *channel = pwm_get_chip_data(pwm); + struct meson_pwm *meson = to_meson_pwm(chip); + struct meson_pwm_channel *channel; struct device *dev = chip->dev; int err; - if (!channel) - return -ENODEV; + channel = pwm_get_chip_data(pwm); + if (channel) + return 0; + + channel = &meson->channels[pwm->hwpwm]; if (channel->clk_parent) { err = clk_set_parent(channel->clk, channel->clk_parent); @@ -124,7 +128,7 @@ static int meson_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) chip->ops->get_state(chip, pwm, &channel->state); - return 0; + return pwm_set_chip_data(pwm, channel); } static void meson_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) @@ -460,14 +464,6 @@ static int meson_pwm_init_channels(struct meson_pwm *meson) return 0; } -static void meson_pwm_add_channels(struct meson_pwm *meson) -{ - unsigned int i; - - for (i = 0; i < meson->chip.npwm; i++) - pwm_set_chip_data(&meson->chip.pwms[i], &meson->channels[i]); -} - static int meson_pwm_probe(struct platform_device *pdev) { struct meson_pwm *meson; @@ -503,8 +499,6 @@ static int meson_pwm_probe(struct platform_device *pdev) return err; } - meson_pwm_add_channels(meson); - platform_set_drvdata(pdev, meson); return 0;
All existing PWM drivers (except pwm-meson and two other ones) call pwm_set_chip_data() from their pwm_ops.request() callback. Now that we can access the struct meson_pwm_channel from struct meson_pwm we can do the same. Move the call to pwm_set_chip_data() to meson_pwm_request() and drop the custom meson_pwm_add_channels(). This makes the implementation consistent with other drivers and makes it slightly more obvious thatpwm_get_chip_data() cannot be used from pwm_ops.get_state() (because that's called by the PWM core before pwm_ops.request()). No functional changes intended. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> --- drivers/pwm/pwm-meson.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-)