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FROMLIST: pwm: Convert period and duty cycle to u64

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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.

Bug: 140290586
Link: https://www.spinics.net/lists/linux-pwm/msg11133.html
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ife96637115f8f704aef938291eb189cb29378afb
This commit is contained in:
Guru Das Srinagesh
2019-11-26 10:57:36 -08:00
committed by Greg Kroah-Hartman
parent 8885e88692
commit d2ee0ef1e0
15 changed files with 31 additions and 30 deletions
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10
drivers/pwm/sysfs.c
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@@ -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 ssize_t output_type_show(struct device *child,