@@ -89,7 +89,7 @@ static int clk_pwm_probe(struct platform_device *pdev)
}
if (of_property_read_u32(node, "clock-frequency", &clk_pwm->fixed_rate))
- clk_pwm->fixed_rate = NSEC_PER_SEC / pargs.period;
+ clk_pwm->fixed_rate = div64_u64(NSEC_PER_SEC, pargs.period);
if (pargs.period != NSEC_PER_SEC / clk_pwm->fixed_rate &&
pargs.period != DIV_ROUND_UP(NSEC_PER_SEC, clk_pwm->fixed_rate)) {
@@ -1868,7 +1868,7 @@ static int pwm_setup_backlight(struct intel_connector *connector,
panel->backlight.min = 0; /* 0% */
panel->backlight.max = 100; /* 100% */
- panel->backlight.level = DIV_ROUND_UP(
+ panel->backlight.level = DIV64_U64_ROUND_UP(
pwm_get_duty_cycle(panel->backlight.pwm) * 100,
CRC_PMIC_PWM_PERIOD_NS);
panel->backlight.enabled = panel->backlight.level != 0;
@@ -437,7 +437,7 @@ static int pwm_fan_resume(struct device *dev)
return 0;
pwm_get_args(ctx->pwm, &pargs);
- duty = DIV_ROUND_UP(ctx->pwm_value * (pargs.period - 1), MAX_PWM);
+ duty = DIV_ROUND_UP_ULL(ctx->pwm_value * (pargs.period - 1), MAX_PWM);
ret = pwm_config(ctx->pwm, duty, pargs.period);
if (ret)
return ret;
@@ -241,7 +241,8 @@ static int ir_rx51_probe(struct platform_device *dev)
}
/* Use default, in case userspace does not set the carrier */
- ir_rx51.freq = DIV_ROUND_CLOSEST(pwm_get_period(pwm), NSEC_PER_SEC);
+ ir_rx51.freq = DIV_ROUND_CLOSEST_ULL(pwm_get_period(pwm),
+ NSEC_PER_SEC);
pwm_put(pwm);
hrtimer_init(&ir_rx51.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
@@ -1156,8 +1156,8 @@ static void pwm_dbg_show(struct pwm_chip *chip, struct seq_file *s)
if (state.enabled)
seq_puts(s, " enabled");
- seq_printf(s, " period: %u ns", state.period);
- seq_printf(s, " duty: %u ns", state.duty_cycle);
+ seq_printf(s, " period: %llu ns", state.period);
+ seq_printf(s, " duty: %llu ns", state.duty_cycle);
seq_printf(s, " polarity: %s",
state.polarity ? "inverse" : "normal");
@@ -43,7 +43,7 @@ static void clps711x_pwm_update_val(struct clps711x_chip *priv, u32 n, u32 v)
static unsigned int clps711x_get_duty(struct pwm_device *pwm, unsigned int v)
{
/* Duty cycle 0..15 max */
- return DIV_ROUND_CLOSEST(v * 0xf, pwm->args.period);
+ return DIV64_U64_ROUND_CLOSEST(v * 0xf, pwm->args.period);
}
static int clps711x_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
@@ -198,7 +198,7 @@ static void pwm_imx27_wait_fifo_slot(struct pwm_chip *chip,
sr = readl(imx->mmio_base + MX3_PWMSR);
fifoav = FIELD_GET(MX3_PWMSR_FIFOAV, sr);
if (fifoav == MX3_PWMSR_FIFOAV_4WORDS) {
- period_ms = DIV_ROUND_UP(pwm_get_period(pwm),
+ period_ms = DIV_ROUND_UP_ULL(pwm_get_period(pwm),
NSEC_PER_MSEC);
msleep(period_ms);
@@ -231,8 +231,7 @@ static int pwm_imx27_apply(struct pwm_chip *chip, struct pwm_device *pwm,
period_cycles /= prescale;
c = (unsigned long long)period_cycles * state->duty_cycle;
- do_div(c, state->period);
- duty_cycles = c;
+ duty_cycles = div64_u64(c, state->period);
/*
* according to imx pwm RM, the real period value should be
@@ -371,10 +371,10 @@ static int sti_pwm_capture(struct pwm_chip *chip, struct pwm_device *pwm,
effective_ticks = clk_get_rate(pc->cpt_clk);
result->period = (high + low) * NSEC_PER_SEC;
- result->period /= effective_ticks;
+ do_div(result->period, effective_ticks);
result->duty_cycle = high * NSEC_PER_SEC;
- result->duty_cycle /= effective_ticks;
+ do_div(result->duty_cycle, effective_ticks);
break;
@@ -244,7 +244,7 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
val = (duty & PWM_DTY_MASK) | PWM_PRD(period);
sun4i_pwm_writel(sun4i_pwm, val, PWM_CH_PRD(pwm->hwpwm));
sun4i_pwm->next_period[pwm->hwpwm] = jiffies +
- usecs_to_jiffies(cstate.period / 1000 + 1);
+ usecs_to_jiffies(div_u64(cstate.period, 1000) + 1);
sun4i_pwm->needs_delay[pwm->hwpwm] = true;
}
@@ -42,7 +42,7 @@ static ssize_t period_show(struct device *child,
pwm_get_state(pwm, &state);
- return sprintf(buf, "%u\n", state.period);
+ return sprintf(buf, "%llu\n", state.period);
}
static ssize_t period_store(struct device *child,
@@ -52,10 +52,10 @@ static ssize_t period_store(struct device *child,
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
struct pwm_state state;
- unsigned int val;
+ u64 val;
int ret;
- ret = kstrtouint(buf, 0, &val);
+ ret = kstrtou64(buf, 0, &val);
if (ret)
return ret;
@@ -77,7 +77,7 @@ static ssize_t duty_cycle_show(struct device *child,
pwm_get_state(pwm, &state);
- return sprintf(buf, "%u\n", state.duty_cycle);
+ return sprintf(buf, "%llu\n", state.duty_cycle);
}
static ssize_t duty_cycle_store(struct device *child,
@@ -212,7 +212,7 @@ static ssize_t capture_show(struct device *child,
if (ret)
return ret;
- return sprintf(buf, "%u %u\n", result.period, result.duty_cycle);
+ return sprintf(buf, "%llu %llu\n", result.period, result.duty_cycle);
}
static DEVICE_ATTR_RW(period);
@@ -616,7 +616,8 @@ static int pwm_backlight_probe(struct platform_device *pdev)
pb->scale = data->max_brightness;
}
- pb->lth_brightness = data->lth_brightness * (state.period / pb->scale);
+ pb->lth_brightness = data->lth_brightness * (div_u64(state.period,
+ pb->scale));
props.type = BACKLIGHT_RAW;
props.max_brightness = data->max_brightness;
@@ -39,7 +39,7 @@ enum pwm_polarity {
* current PWM hardware state.
*/
struct pwm_args {
- unsigned int period;
+ u64 period;
enum pwm_polarity polarity;
};
@@ -56,8 +56,8 @@ enum {
* @enabled: PWM enabled status
*/
struct pwm_state {
- unsigned int period;
- unsigned int duty_cycle;
+ u64 period;
+ u64 duty_cycle;
enum pwm_polarity polarity;
bool enabled;
};
@@ -105,13 +105,13 @@ static inline bool pwm_is_enabled(const struct pwm_device *pwm)
return state.enabled;
}
-static inline void pwm_set_period(struct pwm_device *pwm, unsigned int period)
+static inline void pwm_set_period(struct pwm_device *pwm, u64 period)
{
if (pwm)
pwm->state.period = period;
}
-static inline unsigned int pwm_get_period(const struct pwm_device *pwm)
+static inline u64 pwm_get_period(const struct pwm_device *pwm)
{
struct pwm_state state;
@@ -126,7 +126,7 @@ static inline void pwm_set_duty_cycle(struct pwm_device *pwm, unsigned int duty)
pwm->state.duty_cycle = duty;
}
-static inline unsigned int pwm_get_duty_cycle(const struct pwm_device *pwm)
+static inline u64 pwm_get_duty_cycle(const struct pwm_device *pwm)
{
struct pwm_state state;
@@ -305,8 +305,8 @@ struct pwm_chip {
* @duty_cycle: duty cycle of the PWM signal (in nanoseconds)
*/
struct pwm_capture {
- unsigned int period;
- unsigned int duty_cycle;
+ u64 period;
+ u64 duty_cycle;
};
#if IS_ENABLED(CONFIG_PWM)
Because period and duty cycle are defined as ints with units of nanoseconds, the maximum time duration that can be set is limited to ~2.147 seconds. Change their definitions to u64 in the structs of the PWM framework so that higher durations may be set. Also make the relevant fixes to those drivers that use the period and duty_cycle struct members in division operations, viz. replacing the division operations with 64-bit division macros as appropriate. Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org> --- drivers/clk/clk-pwm.c | 2 +- drivers/gpu/drm/i915/display/intel_panel.c | 2 +- drivers/hwmon/pwm-fan.c | 2 +- drivers/media/rc/ir-rx51.c | 3 ++- drivers/pwm/core.c | 4 ++-- drivers/pwm/pwm-clps711x.c | 2 +- drivers/pwm/pwm-imx27.c | 5 ++--- drivers/pwm/pwm-sti.c | 4 ++-- drivers/pwm/pwm-sun4i.c | 2 +- drivers/pwm/sysfs.c | 10 +++++----- drivers/video/backlight/pwm_bl.c | 3 ++- include/linux/pwm.h | 16 ++++++++-------- 12 files changed, 28 insertions(+), 27 deletions(-)