| Message ID | 20190525181133.4875-13-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: > The PWM core already caches the "current struct pwm_state" as the > "current state of the hardware registers" inside struct pwm_device. > > Drop the struct pwm_state from struct meson_pwm_channel in favour of the > struct pwm_state in struct pwm_device. While here also drop any checks > based on the pwm_state because the PWM core already takes care of this. > > No functional changes intended. > > Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> > --- > drivers/pwm/pwm-meson.c | 25 +------------------------ > 1 file changed, 1 insertion(+), 24 deletions(-) > > diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c > index 010212166d5d..900d362ec3c9 100644 > --- a/drivers/pwm/pwm-meson.c > +++ b/drivers/pwm/pwm-meson.c > @@ -68,8 +68,6 @@ struct meson_pwm_channel { > unsigned int lo; > u8 pre_div; > > - struct pwm_state state; > - > struct clk *clk_parent; > struct clk_mux mux; > struct clk *clk; > @@ -127,8 +125,6 @@ static int meson_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) > return err; > } > > - chip->ops->get_state(chip, pwm, &channel->state); > - > return pwm_set_chip_data(pwm, channel); > } > > @@ -153,10 +149,6 @@ static int meson_pwm_calc(struct meson_pwm *meson, struct pwm_device *pwm, > if (state->polarity == PWM_POLARITY_INVERSED) > duty = period - duty; > > - if (period == channel->state.period && > - duty == channel->state.duty_cycle) > - return 0; > - > fin_freq = clk_get_rate(channel->clk); > if (fin_freq == 0) { > dev_err(meson->chip.dev, "invalid source clock frequency\n"); > @@ -253,7 +245,6 @@ static void meson_pwm_disable(struct meson_pwm *meson, struct pwm_device *pwm) > static int meson_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, > struct pwm_state *state) > { > - struct meson_pwm_channel *channel = pwm_get_chip_data(pwm); > struct meson_pwm *meson = to_meson_pwm(chip); > int err = 0; > > @@ -262,26 +253,12 @@ static int meson_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, > > if (!state->enabled) { > meson_pwm_disable(meson, pwm); > - channel->state.enabled = false; > - > - return 0; > - } > - > - if (state->period != channel->state.period || > - state->duty_cycle != channel->state.duty_cycle || > - state->polarity != channel->state.polarity) { > + } else { > err = meson_pwm_calc(meson, pwm, state); > if (err < 0) > return err; > > - channel->state.polarity = state->polarity; > - channel->state.period = state->period; > - channel->state.duty_cycle = state->duty_cycle; > - } > - > - if (state->enabled && !channel->state.enabled) { > meson_pwm_enable(meson, pwm); > - channel->state.enabled = true; > } > > return 0; > Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c index 010212166d5d..900d362ec3c9 100644 --- a/drivers/pwm/pwm-meson.c +++ b/drivers/pwm/pwm-meson.c @@ -68,8 +68,6 @@ struct meson_pwm_channel { unsigned int lo; u8 pre_div; - struct pwm_state state; - struct clk *clk_parent; struct clk_mux mux; struct clk *clk; @@ -127,8 +125,6 @@ static int meson_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) return err; } - chip->ops->get_state(chip, pwm, &channel->state); - return pwm_set_chip_data(pwm, channel); } @@ -153,10 +149,6 @@ static int meson_pwm_calc(struct meson_pwm *meson, struct pwm_device *pwm, if (state->polarity == PWM_POLARITY_INVERSED) duty = period - duty; - if (period == channel->state.period && - duty == channel->state.duty_cycle) - return 0; - fin_freq = clk_get_rate(channel->clk); if (fin_freq == 0) { dev_err(meson->chip.dev, "invalid source clock frequency\n"); @@ -253,7 +245,6 @@ static void meson_pwm_disable(struct meson_pwm *meson, struct pwm_device *pwm) static int meson_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, struct pwm_state *state) { - struct meson_pwm_channel *channel = pwm_get_chip_data(pwm); struct meson_pwm *meson = to_meson_pwm(chip); int err = 0; @@ -262,26 +253,12 @@ static int meson_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, if (!state->enabled) { meson_pwm_disable(meson, pwm); - channel->state.enabled = false; - - return 0; - } - - if (state->period != channel->state.period || - state->duty_cycle != channel->state.duty_cycle || - state->polarity != channel->state.polarity) { + } else { err = meson_pwm_calc(meson, pwm, state); if (err < 0) return err; - channel->state.polarity = state->polarity; - channel->state.period = state->period; - channel->state.duty_cycle = state->duty_cycle; - } - - if (state->enabled && !channel->state.enabled) { meson_pwm_enable(meson, pwm); - channel->state.enabled = true; } return 0;
The PWM core already caches the "current struct pwm_state" as the "current state of the hardware registers" inside struct pwm_device. Drop the struct pwm_state from struct meson_pwm_channel in favour of the struct pwm_state in struct pwm_device. While here also drop any checks based on the pwm_state because the PWM core already takes care of this. No functional changes intended. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> --- drivers/pwm/pwm-meson.c | 25 +------------------------ 1 file changed, 1 insertion(+), 24 deletions(-)