@@ -1,8 +1,10 @@
/*
- * PWM device driver for ST SoCs.
- * Author: Ajit Pal Singh <ajitpal.singh@st.com>
+ * PWM device driver for ST SoCs
+ *
+ * Copyright (C) 2013-2016 STMicroelectronics (R&D) Limited
*
- * Copyright (C) 2013-2014 STMicroelectronics (R&D) Limited
+ * Author: Ajit Pal Singh <ajitpal.singh@st.com>
+ * Lee Jones <lee.jones@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -142,13 +144,13 @@ static int sti_pwm_get_prescale(struct sti_pwm_chip *pc, unsigned long period,
val = NSEC_PER_SEC / clk_rate;
val *= cdata->max_pwm_cnt + 1;
- if (period % val) {
+ if (period % val)
return -EINVAL;
- } else {
- ps = period / val - 1;
- if (ps > cdata->max_prescale)
- return -EINVAL;
- }
+
+ ps = period / val - 1;
+ if (ps > cdata->max_prescale)
+ return -EINVAL;
+
*prescale = ps;
return 0;
@@ -164,7 +166,7 @@ static int sti_pwm_get_prescale(struct sti_pwm_chip *pc, unsigned long period,
* 256 values.
*/
static int sti_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
- int duty_ns, int period_ns)
+ int duty_ns, int period_ns)
{
struct sti_pwm_chip *pc = to_sti_pwmchip(chip);
struct sti_pwm_compat_data *cdata = pc->cdata;
@@ -210,7 +212,7 @@ static int sti_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
ret =
regmap_field_write(pc->prescale_low,
- prescale & PWM_PRESCALE_LOW_MASK);
+ prescale & PWM_PRESCALE_LOW_MASK);
if (ret)
goto clk_dis;
@@ -273,7 +275,7 @@ static int sti_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
ret = regmap_field_write(pc->pwm_out_en, 1);
if (ret) {
- dev_err(dev, "failed to enable PWM device:%d\n",
+ dev_err(dev, "failed to enable PWM device %d\n",
pwm->hwpwm);
goto out;
}
@@ -293,10 +295,12 @@ static void sti_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
mutex_unlock(&pc->sti_pwm_lock);
return;
}
+
regmap_field_write(pc->pwm_out_en, 0);
clk_disable(pc->pwm_clk);
clk_disable(pc->cpt_clk);
+
mutex_unlock(&pc->sti_pwm_lock);
}
@@ -507,7 +511,7 @@ static int sti_pwm_probe_dt(struct sti_pwm_chip *pc)
return PTR_ERR(pc->pwm_cpt_en);
pc->pwm_cpt_int_en = devm_regmap_field_alloc(dev, pc->regmap,
- reg_fields[PWM_CPT_INT_EN]);
+ reg_fields[PWM_CPT_INT_EN]);
if (IS_ERR(pc->pwm_cpt_int_en))
return PTR_ERR(pc->pwm_cpt_int_en);
@@ -570,11 +574,11 @@ static int sti_pwm_probe(struct platform_device *pdev)
* Setup PWM data with default values: some values could be replaced
* with specific ones provided from Device Tree.
*/
- cdata->reg_fields = &sti_pwm_regfields[0];
- cdata->max_prescale = 0xff;
- cdata->max_pwm_cnt = 255;
- cdata->pwm_num_devs = 1;
- cdata->cpt_num_devs = 0;
+ cdata->reg_fields = &sti_pwm_regfields[0];
+ cdata->max_prescale = 0xff;
+ cdata->max_pwm_cnt = 255;
+ cdata->pwm_num_devs = 1;
+ cdata->cpt_num_devs = 0;
pc->cdata = cdata;
pc->dev = dev;
This includes fixing some Coding Style issues and re-ordering/ simplifying a little code. Signed-off-by: Lee Jones <lee.jones@linaro.org> --- drivers/pwm/pwm-sti.c | 40 ++++++++++++++++++++++------------------ 1 file changed, 22 insertions(+), 18 deletions(-) -- 2.8.0