| From: Dmitry Rokosov <DDRokosov@sberdevices.ru> |
| Subject: units: complement the set of Hz units |
| Date: Mon, 1 Aug 2022 14:37:25 +0000 |
| |
| Patch series "units: complement the set of Hz units", v3. |
| |
| During msa311 accel IIO driver development |
| |
| https://lore.kernel.org/linux-iio/20220616104211.9257-1-ddrokosov@sberdevices.ru/ |
| |
| Andy requested to use proper units in the hz->ms calculation. Current |
| units.h header doesn't have milli, micro and nano HZ coefficients, so some |
| drivers (in the IIO subsystem) implement their own copies for that. |
| |
| The current patchset resolves such a problem and intoduces general |
| MILLIHZ_PER_HZ, MICROHZ_PER_HZ and NANOHZ_PER_HZ definitions in the |
| units.h, and fixes all drivers which duplicate these units. |
| |
| |
| This patch (of 3): |
| |
| Currently, Hz units do not have milli, micro and nano Hz coefficients. |
| Some drivers (IIO especially) use their analogues to calculate |
| appropriate Hz values. This patch includes them to units.h definitions, |
| so they can be used from different kernel places. |
| |
| Link: https://lkml.kernel.org/r/20220801143811.14817-1-ddrokosov@sberdevices.ru |
| Link: https://lkml.kernel.org/r/20220801143811.14817-2-ddrokosov@sberdevices.ru |
| Signed-off-by: Dmitry Rokosov <ddrokosov@sberdevices.ru> |
| Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
| Cc: Daniel Lezcano <daniel.lezcano@linaro.org> |
| Cc: Jonathan Cameron <jic23@kernel.org> |
| Cc: Wolfram Sang <wsa@kernel.org> |
| Cc: Lars-Peter Clausen <lars@metafoo.de> |
| Cc: Michael Hennerich <michael.hennerich@analog.com> |
| Cc: Jyoti Bhayana <jbhayana@google.com> |
| Cc: Andy Shevchenko <andy.shevchenko@gmail.com> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| include/linux/units.h | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| --- a/include/linux/units.h~units-complement-the-set-of-hz-units |
| +++ a/include/linux/units.h |
| @@ -20,6 +20,9 @@ |
| #define PICO 1000000000000ULL |
| #define FEMTO 1000000000000000ULL |
| |
| +#define NANOHZ_PER_HZ 1000000000UL |
| +#define MICROHZ_PER_HZ 1000000UL |
| +#define MILLIHZ_PER_HZ 1000UL |
| #define HZ_PER_KHZ 1000UL |
| #define KHZ_PER_MHZ 1000UL |
| #define HZ_PER_MHZ 1000000UL |
| _ |
