From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Simon Horman <horms+renesas@verge.net.au>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
Thierry Reding <thierry.reding@gmail.com>,
Lee Jones <lee.jones@linaro.org>
Cc: linux-pwm@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
kernel@pengutronix.de
Subject: [PATCH 4/6] pwm: renesas-tpu: Rename variables to match the usual naming
Date: Wed, 13 Apr 2022 10:50:48 +0200 [thread overview]
Message-ID: <20220413085050.61144-4-u.kleine-koenig@pengutronix.de> (raw)
In-Reply-To: <20220413085050.61144-1-u.kleine-koenig@pengutronix.de>
The driver used "pwm" for struct tpu_pwm_device pointers. This name is
usually only used for struct pwm_device pointers which this driver calls
"_pwm". So rename to the driver data pointers to "tpd" which then allows
to drop the underscore from "_pwm".
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
drivers/pwm/pwm-renesas-tpu.c | 172 +++++++++++++++++-----------------
1 file changed, 86 insertions(+), 86 deletions(-)
diff --git a/drivers/pwm/pwm-renesas-tpu.c b/drivers/pwm/pwm-renesas-tpu.c
index 100c21e27648..671f1f824da8 100644
--- a/drivers/pwm/pwm-renesas-tpu.c
+++ b/drivers/pwm/pwm-renesas-tpu.c
@@ -89,71 +89,71 @@ struct tpu_device {
#define to_tpu_device(c) container_of(c, struct tpu_device, chip)
-static void tpu_pwm_write(struct tpu_pwm_device *pwm, int reg_nr, u16 value)
+static void tpu_pwm_write(struct tpu_pwm_device *tpd, int reg_nr, u16 value)
{
- void __iomem *base = pwm->tpu->base + TPU_CHANNEL_OFFSET
- + pwm->channel * TPU_CHANNEL_SIZE;
+ void __iomem *base = tpd->tpu->base + TPU_CHANNEL_OFFSET
+ + tpd->channel * TPU_CHANNEL_SIZE;
iowrite16(value, base + reg_nr);
}
-static void tpu_pwm_set_pin(struct tpu_pwm_device *pwm,
+static void tpu_pwm_set_pin(struct tpu_pwm_device *tpd,
enum tpu_pin_state state)
{
static const char * const states[] = { "inactive", "PWM", "active" };
- dev_dbg(&pwm->tpu->pdev->dev, "%u: configuring pin as %s\n",
- pwm->channel, states[state]);
+ dev_dbg(&tpd->tpu->pdev->dev, "%u: configuring pin as %s\n",
+ tpd->channel, states[state]);
switch (state) {
case TPU_PIN_INACTIVE:
- tpu_pwm_write(pwm, TPU_TIORn,
- pwm->polarity == PWM_POLARITY_INVERSED ?
+ tpu_pwm_write(tpd, TPU_TIORn,
+ tpd->polarity == PWM_POLARITY_INVERSED ?
TPU_TIOR_IOA_1 : TPU_TIOR_IOA_0);
break;
case TPU_PIN_PWM:
- tpu_pwm_write(pwm, TPU_TIORn,
- pwm->polarity == PWM_POLARITY_INVERSED ?
+ tpu_pwm_write(tpd, TPU_TIORn,
+ tpd->polarity == PWM_POLARITY_INVERSED ?
TPU_TIOR_IOA_0_SET : TPU_TIOR_IOA_1_CLR);
break;
case TPU_PIN_ACTIVE:
- tpu_pwm_write(pwm, TPU_TIORn,
- pwm->polarity == PWM_POLARITY_INVERSED ?
+ tpu_pwm_write(tpd, TPU_TIORn,
+ tpd->polarity == PWM_POLARITY_INVERSED ?
TPU_TIOR_IOA_0 : TPU_TIOR_IOA_1);
break;
}
}
-static void tpu_pwm_start_stop(struct tpu_pwm_device *pwm, int start)
+static void tpu_pwm_start_stop(struct tpu_pwm_device *tpd, int start)
{
unsigned long flags;
u16 value;
- spin_lock_irqsave(&pwm->tpu->lock, flags);
- value = ioread16(pwm->tpu->base + TPU_TSTR);
+ spin_lock_irqsave(&tpd->tpu->lock, flags);
+ value = ioread16(tpd->tpu->base + TPU_TSTR);
if (start)
- value |= 1 << pwm->channel;
+ value |= 1 << tpd->channel;
else
- value &= ~(1 << pwm->channel);
+ value &= ~(1 << tpd->channel);
- iowrite16(value, pwm->tpu->base + TPU_TSTR);
- spin_unlock_irqrestore(&pwm->tpu->lock, flags);
+ iowrite16(value, tpd->tpu->base + TPU_TSTR);
+ spin_unlock_irqrestore(&tpd->tpu->lock, flags);
}
-static int tpu_pwm_timer_start(struct tpu_pwm_device *pwm)
+static int tpu_pwm_timer_start(struct tpu_pwm_device *tpd)
{
int ret;
- if (!pwm->timer_on) {
+ if (!tpd->timer_on) {
/* Wake up device and enable clock. */
- pm_runtime_get_sync(&pwm->tpu->pdev->dev);
- ret = clk_prepare_enable(pwm->tpu->clk);
+ pm_runtime_get_sync(&tpd->tpu->pdev->dev);
+ ret = clk_prepare_enable(tpd->tpu->clk);
if (ret) {
- dev_err(&pwm->tpu->pdev->dev, "cannot enable clock\n");
+ dev_err(&tpd->tpu->pdev->dev, "cannot enable clock\n");
return ret;
}
- pwm->timer_on = true;
+ tpd->timer_on = true;
}
/*
@@ -161,8 +161,8 @@ static int tpu_pwm_timer_start(struct tpu_pwm_device *pwm)
* completely. First drive the pin to the inactive state to avoid
* glitches.
*/
- tpu_pwm_set_pin(pwm, TPU_PIN_INACTIVE);
- tpu_pwm_start_stop(pwm, false);
+ tpu_pwm_set_pin(tpd, TPU_PIN_INACTIVE);
+ tpu_pwm_start_stop(tpd, false);
/*
* - Clear TCNT on TGRB match
@@ -172,80 +172,80 @@ static int tpu_pwm_timer_start(struct tpu_pwm_device *pwm)
* - Output 1 until TGRA, output 0 until TGRB (active high polarity
* - PWM mode
*/
- tpu_pwm_write(pwm, TPU_TCRn, TPU_TCR_CCLR_TGRB | TPU_TCR_CKEG_RISING |
- pwm->prescaler);
- tpu_pwm_write(pwm, TPU_TMDRn, TPU_TMDR_MD_PWM);
- tpu_pwm_set_pin(pwm, TPU_PIN_PWM);
- tpu_pwm_write(pwm, TPU_TGRAn, pwm->duty);
- tpu_pwm_write(pwm, TPU_TGRBn, pwm->period);
+ tpu_pwm_write(tpd, TPU_TCRn, TPU_TCR_CCLR_TGRB | TPU_TCR_CKEG_RISING |
+ tpd->prescaler);
+ tpu_pwm_write(tpd, TPU_TMDRn, TPU_TMDR_MD_PWM);
+ tpu_pwm_set_pin(tpd, TPU_PIN_PWM);
+ tpu_pwm_write(tpd, TPU_TGRAn, tpd->duty);
+ tpu_pwm_write(tpd, TPU_TGRBn, tpd->period);
- dev_dbg(&pwm->tpu->pdev->dev, "%u: TGRA 0x%04x TGRB 0x%04x\n",
- pwm->channel, pwm->duty, pwm->period);
+ dev_dbg(&tpd->tpu->pdev->dev, "%u: TGRA 0x%04x TGRB 0x%04x\n",
+ tpd->channel, tpd->duty, tpd->period);
/* Start the channel. */
- tpu_pwm_start_stop(pwm, true);
+ tpu_pwm_start_stop(tpd, true);
return 0;
}
-static void tpu_pwm_timer_stop(struct tpu_pwm_device *pwm)
+static void tpu_pwm_timer_stop(struct tpu_pwm_device *tpd)
{
- if (!pwm->timer_on)
+ if (!tpd->timer_on)
return;
/* Disable channel. */
- tpu_pwm_start_stop(pwm, false);
+ tpu_pwm_start_stop(tpd, false);
/* Stop clock and mark device as idle. */
- clk_disable_unprepare(pwm->tpu->clk);
- pm_runtime_put(&pwm->tpu->pdev->dev);
+ clk_disable_unprepare(tpd->tpu->clk);
+ pm_runtime_put(&tpd->tpu->pdev->dev);
- pwm->timer_on = false;
+ tpd->timer_on = false;
}
/* -----------------------------------------------------------------------------
* PWM API
*/
-static int tpu_pwm_request(struct pwm_chip *chip, struct pwm_device *_pwm)
+static int tpu_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct tpu_device *tpu = to_tpu_device(chip);
- struct tpu_pwm_device *pwm;
+ struct tpu_pwm_device *tpd;
- if (_pwm->hwpwm >= TPU_CHANNEL_MAX)
+ if (pwm->hwpwm >= TPU_CHANNEL_MAX)
return -EINVAL;
- pwm = kzalloc(sizeof(*pwm), GFP_KERNEL);
- if (pwm == NULL)
+ tpd = kzalloc(sizeof(*tpd), GFP_KERNEL);
+ if (tpd == NULL)
return -ENOMEM;
- pwm->tpu = tpu;
- pwm->channel = _pwm->hwpwm;
- pwm->polarity = PWM_POLARITY_NORMAL;
- pwm->prescaler = 0;
- pwm->period = 0;
- pwm->duty = 0;
+ tpd->tpu = tpu;
+ tpd->channel = pwm->hwpwm;
+ tpd->polarity = PWM_POLARITY_NORMAL;
+ tpd->prescaler = 0;
+ tpd->period = 0;
+ tpd->duty = 0;
- pwm->timer_on = false;
+ tpd->timer_on = false;
- pwm_set_chip_data(_pwm, pwm);
+ pwm_set_chip_data(pwm, tpd);
return 0;
}
-static void tpu_pwm_free(struct pwm_chip *chip, struct pwm_device *_pwm)
+static void tpu_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
{
- struct tpu_pwm_device *pwm = pwm_get_chip_data(_pwm);
+ struct tpu_pwm_device *tpd = pwm_get_chip_data(pwm);
- tpu_pwm_timer_stop(pwm);
- kfree(pwm);
+ tpu_pwm_timer_stop(tpd);
+ kfree(tpd);
}
-static int tpu_pwm_config(struct pwm_chip *chip, struct pwm_device *_pwm,
+static int tpu_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
int duty_ns, int period_ns, bool enabled)
{
static const unsigned int prescalers[] = { 1, 4, 16, 64 };
- struct tpu_pwm_device *pwm = pwm_get_chip_data(_pwm);
+ struct tpu_pwm_device *tpd = pwm_get_chip_data(pwm);
struct tpu_device *tpu = to_tpu_device(chip);
unsigned int prescaler;
bool duty_only = false;
@@ -285,29 +285,29 @@ static int tpu_pwm_config(struct pwm_chip *chip, struct pwm_device *_pwm,
"rate %u, prescaler %u, period %u, duty %u\n",
clk_rate, prescalers[prescaler], period, duty);
- if (pwm->prescaler == prescaler && pwm->period == period)
+ if (tpd->prescaler == prescaler && tpd->period == period)
duty_only = true;
- pwm->prescaler = prescaler;
- pwm->period = period;
- pwm->duty = duty;
+ tpd->prescaler = prescaler;
+ tpd->period = period;
+ tpd->duty = duty;
/* If the channel is disabled we're done. */
if (!enabled)
return 0;
- if (duty_only && pwm->timer_on) {
+ if (duty_only && tpd->timer_on) {
/*
* If only the duty cycle changed and the timer is already
* running, there's no need to reconfigure it completely, Just
* modify the duty cycle.
*/
- tpu_pwm_write(pwm, TPU_TGRAn, pwm->duty);
- dev_dbg(&tpu->pdev->dev, "%u: TGRA 0x%04x\n", pwm->channel,
- pwm->duty);
+ tpu_pwm_write(tpd, TPU_TGRAn, tpd->duty);
+ dev_dbg(&tpu->pdev->dev, "%u: TGRA 0x%04x\n", tpd->channel,
+ tpd->duty);
} else {
/* Otherwise perform a full reconfiguration. */
- ret = tpu_pwm_timer_start(pwm);
+ ret = tpu_pwm_timer_start(tpd);
if (ret < 0)
return ret;
}
@@ -317,29 +317,29 @@ static int tpu_pwm_config(struct pwm_chip *chip, struct pwm_device *_pwm,
* To avoid running the timer when not strictly required, handle
* 0% and 100% duty cycles as fixed levels and stop the timer.
*/
- tpu_pwm_set_pin(pwm, duty ? TPU_PIN_ACTIVE : TPU_PIN_INACTIVE);
- tpu_pwm_timer_stop(pwm);
+ tpu_pwm_set_pin(tpd, duty ? TPU_PIN_ACTIVE : TPU_PIN_INACTIVE);
+ tpu_pwm_timer_stop(tpd);
}
return 0;
}
-static int tpu_pwm_set_polarity(struct pwm_chip *chip, struct pwm_device *_pwm,
+static int tpu_pwm_set_polarity(struct pwm_chip *chip, struct pwm_device *pwm,
enum pwm_polarity polarity)
{
- struct tpu_pwm_device *pwm = pwm_get_chip_data(_pwm);
+ struct tpu_pwm_device *tpd = pwm_get_chip_data(pwm);
- pwm->polarity = polarity;
+ tpd->polarity = polarity;
return 0;
}
-static int tpu_pwm_enable(struct pwm_chip *chip, struct pwm_device *_pwm)
+static int tpu_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{
- struct tpu_pwm_device *pwm = pwm_get_chip_data(_pwm);
+ struct tpu_pwm_device *tpd = pwm_get_chip_data(pwm);
int ret;
- ret = tpu_pwm_timer_start(pwm);
+ ret = tpu_pwm_timer_start(tpd);
if (ret < 0)
return ret;
@@ -347,23 +347,23 @@ static int tpu_pwm_enable(struct pwm_chip *chip, struct pwm_device *_pwm)
* To avoid running the timer when not strictly required, handle 0% and
* 100% duty cycles as fixed levels and stop the timer.
*/
- if (pwm->duty == 0 || pwm->duty == pwm->period) {
- tpu_pwm_set_pin(pwm, pwm->duty ?
+ if (tpd->duty == 0 || tpd->duty == tpd->period) {
+ tpu_pwm_set_pin(tpd, tpd->duty ?
TPU_PIN_ACTIVE : TPU_PIN_INACTIVE);
- tpu_pwm_timer_stop(pwm);
+ tpu_pwm_timer_stop(tpd);
}
return 0;
}
-static void tpu_pwm_disable(struct pwm_chip *chip, struct pwm_device *_pwm)
+static void tpu_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
{
- struct tpu_pwm_device *pwm = pwm_get_chip_data(_pwm);
+ struct tpu_pwm_device *tpd = pwm_get_chip_data(pwm);
/* The timer must be running to modify the pin output configuration. */
- tpu_pwm_timer_start(pwm);
- tpu_pwm_set_pin(pwm, TPU_PIN_INACTIVE);
- tpu_pwm_timer_stop(pwm);
+ tpu_pwm_timer_start(tpd);
+ tpu_pwm_set_pin(tpd, TPU_PIN_INACTIVE);
+ tpu_pwm_timer_stop(tpd);
}
static int tpu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
--
2.35.1
next prev parent reply other threads:[~2022-04-13 8:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-13 8:50 [PATCH 1/6] pwm: renesas-tpu: Make use of dev_err_probe() Uwe Kleine-König
2022-04-13 8:50 ` [PATCH 2/6] pwm: renesas-tpu: Make use of devm functions Uwe Kleine-König
2022-04-14 9:07 ` Geert Uytterhoeven
2022-04-13 8:50 ` [PATCH 3/6] pwm: renesas-tpu: Implement .apply() callback Uwe Kleine-König
2022-04-14 9:18 ` Geert Uytterhoeven
2022-04-14 12:16 ` Geert Uytterhoeven
2022-04-13 8:50 ` Uwe Kleine-König [this message]
2022-04-14 9:10 ` [PATCH 4/6] pwm: renesas-tpu: Rename variables to match the usual naming Geert Uytterhoeven
2022-04-13 8:50 ` [PATCH 5/6] pwm: renesas-tpu: Improve maths to compute register settings Uwe Kleine-König
2022-04-14 10:10 ` Geert Uytterhoeven
2022-04-20 10:27 ` Uwe Kleine-König
2022-04-13 8:50 ` [PATCH 6/6] pwm: renesas-tpu: Improve precision of period and duty_cycle calculation Uwe Kleine-König
2022-04-14 10:27 ` Geert Uytterhoeven
2022-04-19 7:41 ` Geert Uytterhoeven
2022-04-19 7:48 ` Uwe Kleine-König
2022-04-14 9:06 ` [PATCH 1/6] pwm: renesas-tpu: Make use of dev_err_probe() Geert Uytterhoeven
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