summaryrefslogtreecommitdiffstats
path: root/drivers/pwm
diff options
context:
space:
mode:
authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2023-07-19 21:20:11 +0200
committerThierry Reding <thierry.reding@gmail.com>2023-07-28 09:34:43 +0200
commit78dca23bd6706dd6a3cdb5c0052f48794b4d2bed (patch)
tree269b57763fd8c0bd27a99749d828374332aa7b60 /drivers/pwm
parentpwm: atmel-tcb: Fix resource freeing in error path and remove (diff)
downloadlinux-78dca23bd6706dd6a3cdb5c0052f48794b4d2bed.tar.xz
linux-78dca23bd6706dd6a3cdb5c0052f48794b4d2bed.zip
pwm: atmel-tcb: Put per-channel data into driver data
This simplifies the code, reduces the number of memory allocations and pointer dereferences. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Claudiu Beznea <claudiu.beznea@tuxon.dev> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
-rw-r--r--drivers/pwm/pwm-atmel-tcb.c29
1 files changed, 9 insertions, 20 deletions
diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c
index 825dd04b86a7..8d0b74b0307c 100644
--- a/drivers/pwm/pwm-atmel-tcb.c
+++ b/drivers/pwm/pwm-atmel-tcb.c
@@ -56,7 +56,7 @@ struct atmel_tcb_pwm_chip {
struct clk *clk;
struct clk *gclk;
struct clk *slow_clk;
- struct atmel_tcb_pwm_device *pwms[NPWM];
+ struct atmel_tcb_pwm_device pwms[NPWM];
struct atmel_tcb_channel bkup;
};
@@ -72,7 +72,7 @@ static int atmel_tcb_pwm_set_polarity(struct pwm_chip *chip,
enum pwm_polarity polarity)
{
struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
- struct atmel_tcb_pwm_device *tcbpwm = tcbpwmc->pwms[pwm->hwpwm];
+ struct atmel_tcb_pwm_device *tcbpwm = &tcbpwmc->pwms[pwm->hwpwm];
tcbpwm->polarity = polarity;
@@ -83,19 +83,13 @@ static int atmel_tcb_pwm_request(struct pwm_chip *chip,
struct pwm_device *pwm)
{
struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
- struct atmel_tcb_pwm_device *tcbpwm;
+ struct atmel_tcb_pwm_device *tcbpwm = &tcbpwmc->pwms[pwm->hwpwm];
unsigned cmr;
int ret;
- tcbpwm = devm_kzalloc(chip->dev, sizeof(*tcbpwm), GFP_KERNEL);
- if (!tcbpwm)
- return -ENOMEM;
-
ret = clk_prepare_enable(tcbpwmc->clk);
- if (ret) {
- devm_kfree(chip->dev, tcbpwm);
+ if (ret)
return ret;
- }
tcbpwm->polarity = PWM_POLARITY_NORMAL;
tcbpwm->duty = 0;
@@ -130,25 +124,20 @@ static int atmel_tcb_pwm_request(struct pwm_chip *chip,
regmap_write(tcbpwmc->regmap, ATMEL_TC_REG(tcbpwmc->channel, CMR), cmr);
spin_unlock(&tcbpwmc->lock);
- tcbpwmc->pwms[pwm->hwpwm] = tcbpwm;
-
return 0;
}
static void atmel_tcb_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
- struct atmel_tcb_pwm_device *tcbpwm = tcbpwmc->pwms[pwm->hwpwm];
clk_disable_unprepare(tcbpwmc->clk);
- tcbpwmc->pwms[pwm->hwpwm] = NULL;
- devm_kfree(chip->dev, tcbpwm);
}
static void atmel_tcb_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
- struct atmel_tcb_pwm_device *tcbpwm = tcbpwmc->pwms[pwm->hwpwm];
+ struct atmel_tcb_pwm_device *tcbpwm = &tcbpwmc->pwms[pwm->hwpwm];
unsigned cmr;
enum pwm_polarity polarity = tcbpwm->polarity;
@@ -205,7 +194,7 @@ static void atmel_tcb_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
static int atmel_tcb_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
- struct atmel_tcb_pwm_device *tcbpwm = tcbpwmc->pwms[pwm->hwpwm];
+ struct atmel_tcb_pwm_device *tcbpwm = &tcbpwmc->pwms[pwm->hwpwm];
u32 cmr;
enum pwm_polarity polarity = tcbpwm->polarity;
@@ -290,7 +279,7 @@ static int atmel_tcb_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
int duty_ns, int period_ns)
{
struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
- struct atmel_tcb_pwm_device *tcbpwm = tcbpwmc->pwms[pwm->hwpwm];
+ struct atmel_tcb_pwm_device *tcbpwm = &tcbpwmc->pwms[pwm->hwpwm];
struct atmel_tcb_pwm_device *atcbpwm = NULL;
int i = 0;
int slowclk = 0;
@@ -337,9 +326,9 @@ static int atmel_tcb_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
period = div_u64(period_ns, min);
if (pwm->hwpwm == 0)
- atcbpwm = tcbpwmc->pwms[1];
+ atcbpwm = &tcbpwmc->pwms[1];
else
- atcbpwm = tcbpwmc->pwms[0];
+ atcbpwm = &tcbpwmc->pwms[0];
/*
* PWM devices provided by the TCB driver are grouped by 2.