[PATCH 6.1 122/451] pwm: atmel-hlcdc: Use consistent variable naming

Sasha Levin
2024-03-24T23:14:09Z

From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

[ Upstream commit aecab554b6ffa9a94ba796031eb39ea20eb60fb3 ]

In PWM drivers the variable name "chip" is usually only used for struct
pwm_chip pointers. This driver however used "chip" for its driver data
and pwm_chip pointers are named "chip", too, when there is no driver
data around and "c" otherwise. Instead use "atmel" for driver data and
always "chip" for pwm_chips.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
[thierry.reding@gmail.com: replace ddata by atmel]
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Stable-dep-of: e25ac87d3f83 ("pwm: atmel-hlcdc: Fix clock imbalance related to suspend support")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pwm/pwm-atmel-hlcdc.c | 65 ++++++++++++++++++-----------------
1 file changed, 33 insertions(+), 32 deletions(-)

diff --git a/drivers/pwm/pwm-atmel-hlcdc.c b/drivers/pwm/pwm-atmel-hlcdc.c
index 96a709a9d49a8..4d0b859d0ac13 100644
--- a/drivers/pwm/pwm-atmel-hlcdc.c
+++ b/drivers/pwm/pwm-atmel-hlcdc.c
@@ -38,11 +38,11 @@ static inline struct atmel_hlcdc_pwm *to_atmel_hlcdc_pwm(struct pwm_chip *chip)
return container_of(chip, struct atmel_hlcdc_pwm, chip);
}

-static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
+static int atmel_hlcdc_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
const struct pwm_state *state)
{
- struct atmel_hlcdc_pwm *chip = to_atmel_hlcdc_pwm(c);
- struct atmel_hlcdc *hlcdc = chip->hlcdc;
+ struct atmel_hlcdc_pwm *atmel = to_atmel_hlcdc_pwm(chip);
+ struct atmel_hlcdc *hlcdc = atmel->hlcdc;
unsigned int status;
int ret;

@@ -54,7 +54,7 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
u32 pwmcfg;
int pres;

- if (!chip->errata || !chip->errata->slow_clk_erratum) {
+ if (!atmel->errata || !atmel->errata->slow_clk_erratum) {
clk_freq = clk_get_rate(new_clk);
if (!clk_freq)
return -EINVAL;
@@ -64,7 +64,7 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
}

/* Errata: cannot use slow clk on some IP revisions */
- if ((chip->errata && chip->errata->slow_clk_erratum) ||
+ if ((atmel->errata && atmel->errata->slow_clk_erratum) ||
clk_period_ns > state->period) {
new_clk = hlcdc->sys_clk;
clk_freq = clk_get_rate(new_clk);
@@ -77,8 +77,8 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,

for (pres = 0; pres <= ATMEL_HLCDC_PWMPS_MAX; pres++) {
/* Errata: cannot divide by 1 on some IP revisions */
- if (!pres && chip->errata &&
- chip->errata->div1_clk_erratum)
+ if (!pres && atmel->errata &&
+ atmel->errata->div1_clk_erratum)
continue;

if ((clk_period_ns << pres) >= state->period)
@@ -90,7 +90,7 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,

pwmcfg = ATMEL_HLCDC_PWMPS(pres);

- if (new_clk != chip->cur_clk) {
+ if (new_clk != atmel->cur_clk) {
u32 gencfg = 0;
int ret;

@@ -98,8 +98,8 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
if (ret)
return ret;

- clk_disable_unprepare(chip->cur_clk);
- chip->cur_clk = new_clk;
+ clk_disable_unprepare(atmel->cur_clk);
+ atmel->cur_clk = new_clk;

if (new_clk == hlcdc->sys_clk)
gencfg = ATMEL_HLCDC_CLKPWMSEL;
@@ -160,8 +160,8 @@ static int atmel_hlcdc_pwm_apply(struct pwm_chip *c, struct pwm_device *pwm,
if (ret)
return ret;

- clk_disable_unprepare(chip->cur_clk);
- chip->cur_clk = NULL;
+ clk_disable_unprepare(atmel->cur_clk);
+ atmel->cur_clk = NULL;
}

return 0;
@@ -183,31 +183,32 @@ static const struct atmel_hlcdc_pwm_errata atmel_hlcdc_pwm_sama5d3_errata = {
#ifdef CONFIG_PM_SLEEP
static int atmel_hlcdc_pwm_suspend(struct device *dev)
{
- struct atmel_hlcdc_pwm *chip = dev_get_drvdata(dev);
+ struct atmel_hlcdc_pwm *atmel = dev_get_drvdata(dev);

/* Keep the periph clock enabled if the PWM is still running. */
- if (pwm_is_enabled(&chip->chip.pwms[0]))
- clk_disable_unprepare(chip->hlcdc->periph_clk);
+ if (pwm_is_enabled(&atmel->chip.pwms[0]))
+ clk_disable_unprepare(atmel->hlcdc->periph_clk);

return 0;
}

static int atmel_hlcdc_pwm_resume(struct device *dev)
{
- struct atmel_hlcdc_pwm *chip = dev_get_drvdata(dev);
+ struct atmel_hlcdc_pwm *atmel = dev_get_drvdata(dev);
struct pwm_state state;
int ret;

- pwm_get_state(&chip->chip.pwms[0], &state);
+ pwm_get_state(&atmel->chip.pwms[0], &state);

/* Re-enable the periph clock it was stopped during suspend. */
if (!state.enabled) {
- ret = clk_prepare_enable(chip->hlcdc->periph_clk);
+ ret = clk_prepare_enable(atmel->hlcdc->periph_clk);
if (ret)
return ret;
}

- return atmel_hlcdc_pwm_apply(&chip->chip, &chip->chip.pwms[0], &state);
+ return atmel_hlcdc_pwm_apply(&atmel->chip, &atmel->chip.pwms[0],
+ &state);
}
#endif

@@ -244,14 +245,14 @@ static int atmel_hlcdc_pwm_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct device *dev = &pdev->dev;
- struct atmel_hlcdc_pwm *chip;
+ struct atmel_hlcdc_pwm *atmel;
struct atmel_hlcdc *hlcdc;
int ret;

hlcdc = dev_get_drvdata(dev->parent);

- chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
- if (!chip)
+ atmel = devm_kzalloc(dev, sizeof(*atmel), GFP_KERNEL);
+ if (!atmel)
return -ENOMEM;

ret = clk_prepare_enable(hlcdc->periph_clk);
@@ -260,31 +261,31 @@ static int atmel_hlcdc_pwm_probe(struct platform_device *pdev)

match = of_match_node(atmel_hlcdc_dt_ids, dev->parent->of_node);
if (match)
- chip->errata = match->data;
+ atmel->errata = match->data;

- chip->hlcdc = hlcdc;
- chip->chip.ops = &atmel_hlcdc_pwm_ops;
- chip->chip.dev = dev;
- chip->chip.npwm = 1;
+ atmel->hlcdc = hlcdc;
+ atmel->chip.ops = &atmel_hlcdc_pwm_ops;
+ atmel->chip.dev = dev;
+ atmel->chip.npwm = 1;

- ret = pwmchip_add(&chip->chip);
+ ret = pwmchip_add(&atmel->chip);
if (ret) {
clk_disable_unprepare(hlcdc->periph_clk);
return ret;
}

- platform_set_drvdata(pdev, chip);
+ platform_set_drvdata(pdev, atmel);

return 0;
}

static void atmel_hlcdc_pwm_remove(struct platform_device *pdev)
{
- struct atmel_hlcdc_pwm *chip = platform_get_drvdata(pdev);
+ struct atmel_hlcdc_pwm *atmel = platform_get_drvdata(pdev);

- pwmchip_remove(&chip->chip);
+ pwmchip_remove(&atmel->chip);

- clk_disable_unprepare(chip->hlcdc->periph_clk);
+ clk_disable_unprepare(atmel->hlcdc->periph_clk);
}

static const struct of_device_id atmel_hlcdc_pwm_dt_ids[] = {
--
2.43.0