Re: [PATCH v1] pwm: mediatek: improve precision in rate calculation

On Fri, Mar 02, 2018 at 04:49:14PM +0800, sean.wang@mediatek.com wrote:

From: Sean Wang sean.wang@mediatek.com

Add a way that turning resolution from in nanosecond into in picosecond to improve noticeably almost 4.5% precision.

It's necessary to hold the new resolution with type u64 and thus related operations on u64 are applied instead in those rate calculations.

And the patch has a dependency on [1].

[1] http://lists.infradead.org/pipermail/linux-mediatek/2018-March/012225.html

Cc: stable@vger.kernel.org Fixes: caf065f8fd58 ("pwm: Add MediaTek PWM support") Signed-off-by: Sean Wang sean.wang@mediatek.com

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drivers/pwm/pwm-mediatek.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-)

Applied, thanks.

Thierry