diff mbox series

[3/4] pwm: meson: Simplify duplicated per-channel tracking

Message ID 20211108134628.120474-3-u.kleine-koenig@pengutronix.de (mailing list archive)
State New, archived
Headers show
Series [1/4] pwm: meson: Drop always false check from .request() | expand

Commit Message

Uwe Kleine-König Nov. 8, 2021, 1:46 p.m. UTC 
The driver tracks per-channel data via struct pwm_device::chip_data and
struct meson_pwm::channels[]. The latter holds the actual data, the former
is only a pointer to the latter. So simplify by using struct
meson_pwm::channels[] consistently.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/pwm/pwm-meson.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

Comments

Martin Blumenstingl Nov. 20, 2021, 11:35 p.m. UTC | #1 
On Mon, Nov 8, 2021 at 2:46 PM Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
>
> The driver tracks per-channel data via struct pwm_device::chip_data and
> struct meson_pwm::channels[]. The latter holds the actual data, the former
> is only a pointer to the latter. So simplify by using struct
> meson_pwm::channels[] consistently.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

note to self: this patch is complete because the first patch in this
series already removes one usage of pwm_get_chip_data
diff mbox series

Patch

diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
index 1fbe54a2abfe..908e314c7c00 100644
--- a/drivers/pwm/pwm-meson.c
+++ b/drivers/pwm/pwm-meson.c
@@ -141,12 +141,13 @@  static int meson_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
 		return err;
 	}
 
-	return pwm_set_chip_data(pwm, channel);
+	return 0;
 }
 
 static void meson_pwm_free(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 = &meson->channels[pwm->hwpwm];
 
 	clk_disable_unprepare(channel->clk);
 }
@@ -154,7 +155,7 @@  static void meson_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
 static int meson_pwm_calc(struct meson_pwm *meson, struct pwm_device *pwm,
 			  const struct pwm_state *state)
 {
-	struct meson_pwm_channel *channel = pwm_get_chip_data(pwm);
+	struct meson_pwm_channel *channel = &meson->channels[pwm->hwpwm];
 	unsigned int duty, period, pre_div, cnt, duty_cnt;
 	unsigned long fin_freq;
 
@@ -217,7 +218,7 @@  static int meson_pwm_calc(struct meson_pwm *meson, struct pwm_device *pwm,
 
 static void meson_pwm_enable(struct meson_pwm *meson, struct pwm_device *pwm)
 {
-	struct meson_pwm_channel *channel = pwm_get_chip_data(pwm);
+	struct meson_pwm_channel *channel = &meson->channels[pwm->hwpwm];
 	struct meson_pwm_channel_data *channel_data;
 	unsigned long flags;
 	u32 value;
@@ -260,8 +261,8 @@  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,
 			   const struct pwm_state *state)
 {
-	struct meson_pwm_channel *channel = pwm_get_chip_data(pwm);
 	struct meson_pwm *meson = to_meson_pwm(chip);
+	struct meson_pwm_channel *channel = &meson->channels[pwm->hwpwm];
 	int err = 0;
 
 	if (!state)