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pwm: tiecap: Miscellaneous coding style fixups 

I noticed most of these while reviewing another patch and thought I'd
fix them while at it. These are mostly changes to make variable types
more strict and whitespace fixups.

Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Thierry Reding 2017-08-21 08:29:41 +02:00
parent 999f6f71f4
commit 53c7972d6d
1 changed files with 47 additions and 41 deletions
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88
drivers/pwm/pwm-tiecap.c
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@ -39,15 +39,15 @@
#define ECCTL2_TSCTR_FREERUN BIT(4)
struct ecap_context {
u32 cap3;
u32 cap4;
u16 ecctl2;
u32 cap3;
u32 cap4;
u16 ecctl2;
};
struct ecap_pwm_chip {
struct pwm_chip chip;
unsigned int clk_rate;
void __iomem *mmio_base;
struct pwm_chip chip;
unsigned int clk_rate;
void __iomem *mmio_base;
struct ecap_context ctx;
};
@ -64,9 +64,9 @@ static int ecap_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
int duty_ns, int period_ns)
{
struct ecap_pwm_chip *pc = to_ecap_pwm_chip(chip);
u32 period_cycles, duty_cycles;
unsigned long long c;
unsigned long period_cycles, duty_cycles;
unsigned int reg_val;
u16 value;
if (period_ns > NSEC_PER_SEC)
return -ERANGE;
@ -74,7 +74,7 @@ static int ecap_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
c = pc->clk_rate;
c = c * period_ns;
do_div(c, NSEC_PER_SEC);
period_cycles = (unsigned long)c;
period_cycles = (u32)c;
if (period_cycles < 1) {
period_cycles = 1;
@ -83,17 +83,17 @@ static int ecap_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
c = pc->clk_rate;
c = c * duty_ns;
do_div(c, NSEC_PER_SEC);
duty_cycles = (unsigned long)c;
duty_cycles = (u32)c;
}
pm_runtime_get_sync(pc->chip.dev);
reg_val = readw(pc->mmio_base + ECCTL2);
value = readw(pc->mmio_base + ECCTL2);
/* Configure APWM mode & disable sync option */
reg_val |= ECCTL2_APWM_MODE | ECCTL2_SYNC_SEL_DISA;
value |= ECCTL2_APWM_MODE | ECCTL2_SYNC_SEL_DISA;
writew(reg_val, pc->mmio_base + ECCTL2);
writew(value, pc->mmio_base + ECCTL2);
if (!pwm_is_enabled(pwm)) {
/* Update active registers if not running */
@ -110,40 +110,45 @@ static int ecap_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
}
if (!pwm_is_enabled(pwm)) {
reg_val = readw(pc->mmio_base + ECCTL2);
value = readw(pc->mmio_base + ECCTL2);
/* Disable APWM mode to put APWM output Low */
reg_val &= ~ECCTL2_APWM_MODE;
writew(reg_val, pc->mmio_base + ECCTL2);
value &= ~ECCTL2_APWM_MODE;
writew(value, pc->mmio_base + ECCTL2);
}
pm_runtime_put_sync(pc->chip.dev);
return 0;
}
static int ecap_pwm_set_polarity(struct pwm_chip *chip, struct pwm_device *pwm,
enum pwm_polarity polarity)
enum pwm_polarity polarity)
{
struct ecap_pwm_chip *pc = to_ecap_pwm_chip(chip);
unsigned short reg_val;
u16 value;
pm_runtime_get_sync(pc->chip.dev);
reg_val = readw(pc->mmio_base + ECCTL2);
value = readw(pc->mmio_base + ECCTL2);
if (polarity == PWM_POLARITY_INVERSED)
/* Duty cycle defines LOW period of PWM */
reg_val |= ECCTL2_APWM_POL_LOW;
value |= ECCTL2_APWM_POL_LOW;
else
/* Duty cycle defines HIGH period of PWM */
reg_val &= ~ECCTL2_APWM_POL_LOW;
value &= ~ECCTL2_APWM_POL_LOW;
writew(value, pc->mmio_base + ECCTL2);
writew(reg_val, pc->mmio_base + ECCTL2);
pm_runtime_put_sync(pc->chip.dev);
return 0;
}
static int ecap_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct ecap_pwm_chip *pc = to_ecap_pwm_chip(chip);
unsigned int reg_val;
u16 value;
/* Leave clock enabled on enabling PWM */
pm_runtime_get_sync(pc->chip.dev);
@ -152,24 +157,25 @@ static int ecap_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
* Enable 'Free run Time stamp counter mode' to start counter
* and 'APWM mode' to enable APWM output
*/
reg_val = readw(pc->mmio_base + ECCTL2);
reg_val |= ECCTL2_TSCTR_FREERUN | ECCTL2_APWM_MODE;
writew(reg_val, pc->mmio_base + ECCTL2);
value = readw(pc->mmio_base + ECCTL2);
value |= ECCTL2_TSCTR_FREERUN | ECCTL2_APWM_MODE;
writew(value, pc->mmio_base + ECCTL2);
return 0;
}
static void ecap_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct ecap_pwm_chip *pc = to_ecap_pwm_chip(chip);
unsigned int reg_val;
u16 value;
/*
* Disable 'Free run Time stamp counter mode' to stop counter
* and 'APWM mode' to put APWM output to low
*/
reg_val = readw(pc->mmio_base + ECCTL2);
reg_val &= ~(ECCTL2_TSCTR_FREERUN | ECCTL2_APWM_MODE);
writew(reg_val, pc->mmio_base + ECCTL2);
value = readw(pc->mmio_base + ECCTL2);
value &= ~(ECCTL2_TSCTR_FREERUN | ECCTL2_APWM_MODE);
writew(value, pc->mmio_base + ECCTL2);
/* Disable clock on PWM disable */
pm_runtime_put_sync(pc->chip.dev);
@ -184,12 +190,12 @@ static void ecap_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
}
static const struct pwm_ops ecap_pwm_ops = {
.free = ecap_pwm_free,
.config = ecap_pwm_config,
.set_polarity = ecap_pwm_set_polarity,
.enable = ecap_pwm_enable,
.disable = ecap_pwm_disable,
.owner = THIS_MODULE,
.free = ecap_pwm_free,
.config = ecap_pwm_config,
.set_polarity = ecap_pwm_set_polarity,
.enable = ecap_pwm_enable,
.disable = ecap_pwm_disable,
.owner = THIS_MODULE,
};
static const struct of_device_id ecap_of_match[] = {
@ -202,10 +208,10 @@ MODULE_DEVICE_TABLE(of, ecap_of_match);
static int ecap_pwm_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
int ret;
struct ecap_pwm_chip *pc;
struct resource *r;
struct clk *clk;
struct ecap_pwm_chip *pc;
int ret;
pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
if (!pc)
@ -259,6 +265,7 @@ static int ecap_pwm_remove(struct platform_device *pdev)
struct ecap_pwm_chip *pc = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
return pwmchip_remove(&pc->chip);
}
@ -311,14 +318,13 @@ static SIMPLE_DEV_PM_OPS(ecap_pwm_pm_ops, ecap_pwm_suspend, ecap_pwm_resume);
static struct platform_driver ecap_pwm_driver = {
.driver = {
.name = "ecap",
.name = "ecap",
.of_match_table = ecap_of_match,
.pm = &ecap_pwm_pm_ops,
.pm = &ecap_pwm_pm_ops,
},
.probe = ecap_pwm_probe,
.remove = ecap_pwm_remove,
};
module_platform_driver(ecap_pwm_driver);
MODULE_DESCRIPTION("ECAP PWM driver");