This prepares the driver for further changes that will make it harder to
determine the pwm_chip from a given samsung_pwm_chip. To just not have
to do that, rework pwm_samsung_calc_tin() and pwm_samsung_parse_dt take
a pwm_chip. Also use the pwm_chip as driver data instead of the
samsung_pwm_chip.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
drivers/pwm/pwm-samsung.c | 41 ++++++++++++++++++++++-----------------
1 file changed, 23 insertions(+), 18 deletions(-)
diff --git a/drivers/pwm/pwm-samsung.c b/drivers/pwm/pwm-samsung.c
index 0f9a2a5e3ebc..ecd612adf19d 100644
--- a/drivers/pwm/pwm-samsung.c
+++ b/drivers/pwm/pwm-samsung.c
@@ -181,9 +181,10 @@ static unsigned long pwm_samsung_get_tin_rate(struct samsung_pwm_chip *our_chip,
return rate / (reg + 1);
}
-static unsigned long pwm_samsung_calc_tin(struct samsung_pwm_chip *our_chip,
+static unsigned long pwm_samsung_calc_tin(struct pwm_chip *chip,
unsigned int chan, unsigned long freq)
{
+ struct samsung_pwm_chip *our_chip = to_samsung_pwm_chip(chip);
struct samsung_pwm_variant *variant = &our_chip->variant;
unsigned long rate;
struct clk *clk;
@@ -197,12 +198,12 @@ static unsigned long pwm_samsung_calc_tin(struct samsung_pwm_chip *our_chip,
return rate;
}
- dev_warn(our_chip->chip.dev,
+ dev_warn(chip->dev,
"tclk of PWM %d is inoperational, using tdiv\n", chan);
}
rate = pwm_samsung_get_tin_rate(our_chip, chan);
- dev_dbg(our_chip->chip.dev, "tin parent at %lu\n", rate);
+ dev_dbg(chip->dev, "tin parent at %lu\n", rate);
/*
* Compare minimum PWM frequency that can be achieved with possible
@@ -329,7 +330,7 @@ static int __pwm_samsung_config(struct pwm_chip *chip, struct pwm_device *pwm,
dev_dbg(chip->dev, "duty_ns=%d, period_ns=%d (%u)\n",
duty_ns, period_ns, period);
- tin_rate = pwm_samsung_calc_tin(our_chip, pwm->hwpwm, period);
+ tin_rate = pwm_samsung_calc_tin(chip, pwm->hwpwm, period);
dev_dbg(chip->dev, "tin_rate=%lu\n", tin_rate);
@@ -506,9 +507,10 @@ static const struct of_device_id samsung_pwm_matches[] = {
};
MODULE_DEVICE_TABLE(of, samsung_pwm_matches);
-static int pwm_samsung_parse_dt(struct samsung_pwm_chip *our_chip)
+static int pwm_samsung_parse_dt(struct pwm_chip *chip)
{
- struct device_node *np = our_chip->chip.dev->of_node;
+ struct samsung_pwm_chip *our_chip = to_samsung_pwm_chip(chip);
+ struct device_node *np = chip->dev->of_node;
const struct of_device_id *match;
struct property *prop;
const __be32 *cur;
@@ -522,7 +524,7 @@ static int pwm_samsung_parse_dt(struct samsung_pwm_chip *our_chip)
of_property_for_each_u32(np, "samsung,pwm-outputs", prop, cur, val) {
if (val >= SAMSUNG_PWM_NUM) {
- dev_err(our_chip->chip.dev,
+ dev_err(chip->dev,
"%s: invalid channel index in samsung,pwm-outputs property\n",
__func__);
continue;
@@ -533,7 +535,7 @@ static int pwm_samsung_parse_dt(struct samsung_pwm_chip *our_chip)
return 0;
}
#else
-static int pwm_samsung_parse_dt(struct samsung_pwm_chip *our_chip)
+static int pwm_samsung_parse_dt(struct pwm_chip *chip)
{
return -ENODEV;
}
@@ -543,6 +545,7 @@ static int pwm_samsung_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct samsung_pwm_chip *our_chip;
+ struct pwm_chip *chip;
unsigned int chan;
int ret;
@@ -550,13 +553,14 @@ static int pwm_samsung_probe(struct platform_device *pdev)
if (our_chip == NULL)
return -ENOMEM;
- our_chip->chip.dev = &pdev->dev;
- our_chip->chip.ops = &pwm_samsung_ops;
- our_chip->chip.npwm = SAMSUNG_PWM_NUM;
+ chip = &our_chip->chip;
+ chip->dev = &pdev->dev;
+ chip->ops = &pwm_samsung_ops;
+ chip->npwm = SAMSUNG_PWM_NUM;
our_chip->inverter_mask = BIT(SAMSUNG_PWM_NUM) - 1;
if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
- ret = pwm_samsung_parse_dt(our_chip);
+ ret = pwm_samsung_parse_dt(chip);
if (ret)
return ret;
} else {
@@ -593,9 +597,9 @@ static int pwm_samsung_probe(struct platform_device *pdev)
our_chip->tclk0 = devm_clk_get(&pdev->dev, "pwm-tclk0");
our_chip->tclk1 = devm_clk_get(&pdev->dev, "pwm-tclk1");
- platform_set_drvdata(pdev, our_chip);
+ platform_set_drvdata(pdev, chip);
- ret = pwmchip_add(&our_chip->chip);
+ ret = pwmchip_add(chip);
if (ret < 0) {
dev_err(dev, "failed to register PWM chip\n");
clk_disable_unprepare(our_chip->base_clk);
@@ -612,17 +616,18 @@ static int pwm_samsung_probe(struct platform_device *pdev)
static void pwm_samsung_remove(struct platform_device *pdev)
{
- struct samsung_pwm_chip *our_chip = platform_get_drvdata(pdev);
+ struct pwm_chip *chip = platform_get_drvdata(pdev);
+ struct samsung_pwm_chip *our_chip = to_samsung_pwm_chip(chip);
- pwmchip_remove(&our_chip->chip);
+ pwmchip_remove(chip);
clk_disable_unprepare(our_chip->base_clk);
}
static int pwm_samsung_resume(struct device *dev)
{
- struct samsung_pwm_chip *our_chip = dev_get_drvdata(dev);
- struct pwm_chip *chip = &our_chip->chip;
+ struct pwm_chip *chip = dev_get_drvdata(dev);
+ struct samsung_pwm_chip *our_chip = to_samsung_pwm_chip(chip);
unsigned int i;
for (i = 0; i < SAMSUNG_PWM_NUM; i++) {
--
2.43.0
