linux-kernel - [PATCH v3 01/14] pwm: meson: unify the parameter list of meson_pwm

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Message-Id: <20190612195911.4442-2-martin.blumenstingl@googlemail.com>
Date:   Wed, 12 Jun 2019 21:58:58 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     linux-amlogic@...ts.infradead.org, linux-pwm@...r.kernel.org,
        thierry.reding@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        u.kleine-koenig@...gutronix.de, narmstrong@...libre.com,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH v3 01/14] pwm: meson: unify the parameter list of meson_pwm_{enable,disable}

This is a preparation for a future cleanup. Pass struct pwm_device
instead of passing the individual values required by each function as
these can be obtained for each struct pwm_device instance.

As a nice side-effect the driver now uses "switch (pwm->hwpwm)"
everywhere. Before some functions used "switch (id)" while others used
"switch (pwm->hwpwm)".

No functional changes.

Reviewed-by: Neil Armstrong <narmstrong@...libre.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 drivers/pwm/pwm-meson.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
index 5fef7e925282..3fbbc4128ce8 100644
--- a/drivers/pwm/pwm-meson.c
+++ b/drivers/pwm/pwm-meson.c
@@ -183,15 +183,14 @@ static int meson_pwm_calc(struct meson_pwm *meson,
 	return 0;
 }
 
-static void meson_pwm_enable(struct meson_pwm *meson,
-			     struct meson_pwm_channel *channel,
-			     unsigned int id)
+static void meson_pwm_enable(struct meson_pwm *meson, struct pwm_device *pwm)
 {
+	struct meson_pwm_channel *channel = pwm_get_chip_data(pwm);
 	u32 value, clk_shift, clk_enable, enable;
 	unsigned int offset;
 	unsigned long flags;
 
-	switch (id) {
+	switch (pwm->hwpwm) {
 	case 0:
 		clk_shift = MISC_A_CLK_DIV_SHIFT;
 		clk_enable = MISC_A_CLK_EN;
@@ -228,12 +227,12 @@ static void meson_pwm_enable(struct meson_pwm *meson,
 	spin_unlock_irqrestore(&meson->lock, flags);
 }
 
-static void meson_pwm_disable(struct meson_pwm *meson, unsigned int id)
+static void meson_pwm_disable(struct meson_pwm *meson, struct pwm_device *pwm)
 {
 	u32 value, enable;
 	unsigned long flags;
 
-	switch (id) {
+	switch (pwm->hwpwm) {
 	case 0:
 		enable = MISC_A_EN;
 		break;
@@ -266,7 +265,7 @@ static int meson_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 		return -EINVAL;
 
 	if (!state->enabled) {
-		meson_pwm_disable(meson, pwm->hwpwm);
+		meson_pwm_disable(meson, pwm);
 		channel->state.enabled = false;
 
 		return 0;
@@ -293,7 +292,7 @@ static int meson_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	}
 
 	if (state->enabled && !channel->state.enabled) {
-		meson_pwm_enable(meson, channel, pwm->hwpwm);
+		meson_pwm_enable(meson, pwm);
 		channel->state.enabled = true;
 	}
 
-- 
2.22.0