pwm: meson: Simplify duplicated per-channel tracking

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>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
index 1fbe54a..908e314 100644 (file)
--- 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)