diff --git a/drivers/clk/clk-pwm.c b/drivers/clk/clk-pwm.c
index 87fe0b0e01a3..86f2e2d3fc02 100644
--- a/drivers/clk/clk-pwm.c
+++ b/drivers/clk/clk-pwm.c
@@ -89,7 +89,12 @@ 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 (!clk_pwm->fixed_rate) {
+		dev_err(&pdev->dev, "fixed_rate cannot be zero\n");
+		return -EINVAL;
+	}
 
 	if (pargs.period != NSEC_PER_SEC / clk_pwm->fixed_rate &&
 	    pargs.period != DIV_ROUND_UP(NSEC_PER_SEC, clk_pwm->fixed_rate)) {
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index aaed9eb3b56c..bbde3b12c311 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -1929,7 +1929,7 @@ static int pwm_setup_backlight(struct intel_connector *connector,
 		return retval;
 	}
 
-	level = DIV_ROUND_UP(pwm_get_duty_cycle(panel->backlight.pwm) * 100,
+	level = DIV_ROUND_UP_ULL(pwm_get_duty_cycle(panel->backlight.pwm) * 100,
 			     CRC_PMIC_PWM_PERIOD_NS);
 	panel->backlight.level =
 		intel_panel_compute_brightness(connector, level);
diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
index 30b7b3ea8836..17bb64299bfd 100644
--- a/drivers/hwmon/pwm-fan.c
+++ b/drivers/hwmon/pwm-fan.c
@@ -447,7 +447,7 @@ 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;
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 004b2ea9b5fd..276e939a5684 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -510,12 +510,12 @@ static void pwm_apply_state_debug(struct pwm_device *pwm,
 	    last->period > s2.period &&
 	    last->period <= state->period)
 		dev_warn(chip->dev,
-			 ".apply didn't pick the best available period (requested: %u, applied: %u, possible: %u)\n",
+			 ".apply didn't pick the best available period (requested: %llu, applied: %llu, possible: %llu)\n",
 			 state->period, s2.period, last->period);
 
 	if (state->enabled && state->period < s2.period)
 		dev_warn(chip->dev,
-			 ".apply is supposed to round down period (requested: %u, applied: %u)\n",
+			 ".apply is supposed to round down period (requested: %llu, applied: %llu)\n",
 			 state->period, s2.period);
 
 	if (state->enabled &&
@@ -524,14 +524,14 @@ static void pwm_apply_state_debug(struct pwm_device *pwm,
 	    last->duty_cycle > s2.duty_cycle &&
 	    last->duty_cycle <= state->duty_cycle)
 		dev_warn(chip->dev,
-			 ".apply didn't pick the best available duty cycle (requested: %u/%u, applied: %u/%u, possible: %u/%u)\n",
+			 ".apply didn't pick the best available duty cycle (requested: %llu/%llu, applied: %llu/%llu, possible: %llu/%llu)\n",
 			 state->duty_cycle, state->period,
 			 s2.duty_cycle, s2.period,
 			 last->duty_cycle, last->period);
 
 	if (state->enabled && state->duty_cycle < s2.duty_cycle)
 		dev_warn(chip->dev,
-			 ".apply is supposed to round down duty_cycle (requested: %u/%u, applied: %u/%u)\n",
+			 ".apply is supposed to round down duty_cycle (requested: %llu/%llu, applied: %llu/%llu)\n",
 			 state->duty_cycle, state->period,
 			 s2.duty_cycle, s2.period);
 
@@ -558,7 +558,7 @@ static void pwm_apply_state_debug(struct pwm_device *pwm,
 	    (s1.enabled && s1.period != last->period) ||
 	    (s1.enabled && s1.duty_cycle != last->duty_cycle)) {
 		dev_err(chip->dev,
-			".apply is not idempotent (ena=%d pol=%d %u/%u) -> (ena=%d pol=%d %u/%u)\n",
+			".apply is not idempotent (ena=%d pol=%d %llu/%llu) -> (ena=%d pol=%d %llu/%llu)\n",
 			s1.enabled, s1.polarity, s1.duty_cycle, s1.period,
 			last->enabled, last->polarity, last->duty_cycle,
 			last->period);
@@ -1284,8 +1284,8 @@ 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");
 
diff --git a/drivers/pwm/pwm-bcm-iproc.c b/drivers/pwm/pwm-bcm-iproc.c
index 1f829edd8ee7..79b1e58e946d 100644
--- a/drivers/pwm/pwm-bcm-iproc.c
+++ b/drivers/pwm/pwm-bcm-iproc.c
@@ -85,8 +85,6 @@ static void iproc_pwmc_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
 	u64 tmp, multi, rate;
 	u32 value, prescale;
 
-	rate = clk_get_rate(ip->clk);
-
 	value = readl(ip->base + IPROC_PWM_CTRL_OFFSET);
 
 	if (value & BIT(IPROC_PWM_CTRL_EN_SHIFT(pwm->hwpwm)))
@@ -99,6 +97,13 @@ static void iproc_pwmc_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
 	else
 		state->polarity = PWM_POLARITY_INVERSED;
 
+	rate = clk_get_rate(ip->clk);
+	if (rate == 0) {
+		state->period = 0;
+		state->duty_cycle = 0;
+		return;
+	}
+
 	value = readl(ip->base + IPROC_PWM_PRESCALE_OFFSET);
 	prescale = value >> IPROC_PWM_PRESCALE_SHIFT(pwm->hwpwm);
 	prescale &= IPROC_PWM_PRESCALE_MAX;
@@ -143,8 +148,7 @@ static int iproc_pwmc_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 		value = rate * state->duty_cycle;
 		duty = div64_u64(value, div);
 
-		if (period < IPROC_PWM_PERIOD_MIN ||
-		    duty < IPROC_PWM_DUTY_CYCLE_MIN)
+		if (period < IPROC_PWM_PERIOD_MIN)
 			return -EINVAL;
 
 		if (period <= IPROC_PWM_PERIOD_MAX &&
diff --git a/drivers/pwm/pwm-bcm-kona.c b/drivers/pwm/pwm-bcm-kona.c
index 81da91df2529..16c5898b934a 100644
--- a/drivers/pwm/pwm-bcm-kona.c
+++ b/drivers/pwm/pwm-bcm-kona.c
@@ -138,7 +138,7 @@ static int kona_pwmc_config(struct pwm_chip *chip, struct pwm_device *pwm,
 		dc = div64_u64(val, div);
 
 		/* If duty_ns or period_ns are not achievable then return */
-		if (pc < PERIOD_COUNT_MIN || dc < DUTY_CYCLE_HIGH_MIN)
+		if (pc < PERIOD_COUNT_MIN)
 			return -EINVAL;
 
 		/* If pc and dc are in bounds, the calculation is done */
diff --git a/drivers/pwm/pwm-clps711x.c b/drivers/pwm/pwm-clps711x.c
index 924d39a797cf..ba9500aca078 100644
--- a/drivers/pwm/pwm-clps711x.c
+++ b/drivers/pwm/pwm-clps711x.c
@@ -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)
diff --git a/drivers/pwm/pwm-imx-tpm.c b/drivers/pwm/pwm-imx-tpm.c
index 5f3d7f7e6aef..fcdf6befb838 100644
--- a/drivers/pwm/pwm-imx-tpm.c
+++ b/drivers/pwm/pwm-imx-tpm.c
@@ -124,7 +124,7 @@ static int pwm_imx_tpm_round_state(struct pwm_chip *chip,
 		real_state->duty_cycle = state->duty_cycle;
 
 	tmp = (u64)p->mod * real_state->duty_cycle;
-	p->val = DIV_ROUND_CLOSEST_ULL(tmp, real_state->period);
+	p->val = DIV64_U64_ROUND_CLOSEST(tmp, real_state->period);
 
 	real_state->polarity = state->polarity;
 	real_state->enabled = state->enabled;
diff --git a/drivers/pwm/pwm-imx27.c b/drivers/pwm/pwm-imx27.c
index 732a6f3701e8..c50d453552bd 100644
--- a/drivers/pwm/pwm-imx27.c
+++ b/drivers/pwm/pwm-imx27.c
@@ -202,7 +202,7 @@ 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);
 
diff --git a/drivers/pwm/pwm-iqs620a.c b/drivers/pwm/pwm-iqs620a.c
index 674f0e238ba0..7d33e3646436 100644
--- a/drivers/pwm/pwm-iqs620a.c
+++ b/drivers/pwm/pwm-iqs620a.c
@@ -25,10 +25,10 @@
 #include <linux/regmap.h>
 #include <linux/slab.h>
 
-#define IQS620_PWR_SETTINGS			0xD2
+#define IQS620_PWR_SETTINGS			0xd2
 #define IQS620_PWR_SETTINGS_PWM_OUT		BIT(7)
 
-#define IQS620_PWM_DUTY_CYCLE			0xD8
+#define IQS620_PWM_DUTY_CYCLE			0xd8
 
 #define IQS620_PWM_PERIOD_NS			1000000
 
@@ -46,7 +46,8 @@ static int iqs620_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 {
 	struct iqs620_pwm_private *iqs620_pwm;
 	struct iqs62x_core *iqs62x;
-	int duty_scale, ret;
+	u64 duty_scale;
+	int ret;
 
 	if (state->polarity != PWM_POLARITY_NORMAL)
 		return -ENOTSUPP;
@@ -69,7 +70,7 @@ static int iqs620_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	 * For lower duty cycles (e.g. 0), the PWM output is simply disabled to
 	 * allow an external pull-down resistor to hold the GPIO3/LTX pin low.
 	 */
-	duty_scale = state->duty_cycle * 256 / IQS620_PWM_PERIOD_NS;
+	duty_scale = div_u64(state->duty_cycle * 256, IQS620_PWM_PERIOD_NS);
 
 	mutex_lock(&iqs620_pwm->lock);
 
@@ -81,7 +82,7 @@ static int iqs620_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	}
 
 	if (duty_scale) {
-		u8 duty_val = min(duty_scale - 1, 0xFF);
+		u8 duty_val = min_t(u64, duty_scale - 1, 0xff);
 
 		ret = regmap_write(iqs62x->regmap, IQS620_PWM_DUTY_CYCLE,
 				   duty_val);
@@ -93,7 +94,7 @@ static int iqs620_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 
 	if (state->enabled && duty_scale) {
 		ret = regmap_update_bits(iqs62x->regmap, IQS620_PWR_SETTINGS,
-					 IQS620_PWR_SETTINGS_PWM_OUT, 0xFF);
+					 IQS620_PWR_SETTINGS_PWM_OUT, 0xff);
 		if (ret)
 			goto err_mutex;
 	}
@@ -159,7 +160,7 @@ static int iqs620_pwm_notifier(struct notifier_block *notifier,
 
 	ret = regmap_update_bits(iqs62x->regmap, IQS620_PWR_SETTINGS,
 				 IQS620_PWR_SETTINGS_PWM_OUT,
-				 iqs620_pwm->out_en ? 0xFF : 0);
+				 iqs620_pwm->out_en ? 0xff : 0);
 
 err_mutex:
 	mutex_unlock(&iqs620_pwm->lock);
diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index b94e0d09c300..ab001ce55178 100644
--- a/drivers/pwm/pwm-mediatek.c
+++ b/drivers/pwm/pwm-mediatek.c
@@ -46,6 +46,7 @@ struct pwm_mediatek_of_data {
  * @clk_main: the clock used by PWM core
  * @clk_pwms: the clock used by each PWM channel
  * @clk_freq: the fix clock frequency of legacy MIPS SoC
+ * @soc: pointer to chip's platform data
  */
 struct pwm_mediatek_chip {
 	struct pwm_chip chip;
diff --git a/drivers/pwm/pwm-omap-dmtimer.c b/drivers/pwm/pwm-omap-dmtimer.c
index 0d31833db2e2..358db4ff9d4f 100644
--- a/drivers/pwm/pwm-omap-dmtimer.c
+++ b/drivers/pwm/pwm-omap-dmtimer.c
@@ -14,7 +14,7 @@
  *   with a timer counter that goes up. When it overflows it gets
  *   reloaded with the load value and the pwm output goes up.
  *   When counter matches with match register, the output goes down.
- *   Reference Manual: http://www.ti.com/lit/ug/spruh73q/spruh73q.pdf
+ *   Reference Manual: https://www.ti.com/lit/ug/spruh73q/spruh73q.pdf
  *
  * Limitations:
  * - When PWM is stopped, timer counter gets stopped immediately. This
@@ -58,7 +58,7 @@
  * @mutex:		Mutex to protect pwm apply state
  * @dm_timer:		Pointer to omap dm timer.
  * @pdata:		Pointer to omap dm timer ops.
- * dm_timer_pdev:	Pointer to omap dm timer platform device
+ * @dm_timer_pdev:	Pointer to omap dm timer platform device
  */
 struct pwm_omap_dmtimer_chip {
 	struct pwm_chip chip;
diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c
index cc63f9baa481..62de0bb85921 100644
--- a/drivers/pwm/pwm-sifive.c
+++ b/drivers/pwm/pwm-sifive.c
@@ -181,7 +181,7 @@ static int pwm_sifive_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	 * consecutively
 	 */
 	num = (u64)duty_cycle * (1U << PWM_SIFIVE_CMPWIDTH);
-	frac = DIV_ROUND_CLOSEST_ULL(num, state->period);
+	frac = DIV64_U64_ROUND_CLOSEST(num, state->period);
 	/* The hardware cannot generate a 100% duty cycle */
 	frac = min(frac, (1U << PWM_SIFIVE_CMPWIDTH) - 1);
 
diff --git a/drivers/pwm/pwm-stm32-lp.c b/drivers/pwm/pwm-stm32-lp.c
index 67fca62524dc..134c14621ee0 100644
--- a/drivers/pwm/pwm-stm32-lp.c
+++ b/drivers/pwm/pwm-stm32-lp.c
@@ -61,7 +61,7 @@ static int stm32_pwm_lp_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	do_div(div, NSEC_PER_SEC);
 	if (!div) {
 		/* Clock is too slow to achieve requested period. */
-		dev_dbg(priv->chip.dev, "Can't reach %u ns\n",	state->period);
+		dev_dbg(priv->chip.dev, "Can't reach %llu ns\n", state->period);
 		return -EINVAL;
 	}
 
diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
index 18fbbe3277d0..961c59c99bb3 100644
--- a/drivers/pwm/pwm-sun4i.c
+++ b/drivers/pwm/pwm-sun4i.c
@@ -285,7 +285,7 @@ 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);
+		nsecs_to_jiffies(cstate.period + 1000);
 
 	if (state->polarity != PWM_POLARITY_NORMAL)
 		ctrl &= ~BIT_CH(PWM_ACT_STATE, pwm->hwpwm);
diff --git a/drivers/pwm/pwm-tiecap.c b/drivers/pwm/pwm-tiecap.c
index ab38c8203b79..683804c7d26c 100644
--- a/drivers/pwm/pwm-tiecap.c
+++ b/drivers/pwm/pwm-tiecap.c
@@ -2,7 +2,7 @@
 /*
  * ECAP PWM driver
  *
- * Copyright (C) 2012 Texas Instruments, Inc. - http://www.ti.com/
+ * Copyright (C) 2012 Texas Instruments, Inc. - https://www.ti.com/
  */
 
 #include <linux/module.h>
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index 7b4c770ce9d6..0846917ff2d2 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -2,7 +2,7 @@
 /*
  * EHRPWM PWM driver
  *
- * Copyright (C) 2012 Texas Instruments, Inc. - http://www.ti.com/
+ * Copyright (C) 2012 Texas Instruments, Inc. - https://www.ti.com/
  */
 
 #include <linux/module.h>
diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c
index 2389b8669846..449dbc0f49ed 100644
--- a/drivers/pwm/sysfs.c
+++ b/drivers/pwm/sysfs.c
@@ -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,
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index eff64db2e02e..dfc760830eb9 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -601,7 +601,8 @@ 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;
diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index 8e06ba912d60..09425ec317ba 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -312,7 +312,7 @@ static int ssd1307fb_init(struct ssd1307fb_par *par)
 		/* Enable the PWM */
 		pwm_enable(par->pwm);
 
-		dev_dbg(&par->client->dev, "Using PWM%d with a %dns period.\n",
+		dev_dbg(&par->client->dev, "Using PWM%d with a %lluns period.\n",
 			par->pwm->pwm, pwm_get_period(par->pwm));
 	}
 
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 2635b2a55090..a13ff383fa1d 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -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;
 };
@@ -107,13 +107,13 @@ 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;
 
@@ -128,7 +128,7 @@ 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;