From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933648AbbIVPyh (ORCPT ); Tue, 22 Sep 2015 11:54:37 -0400 Received: from mga11.intel.com ([192.55.52.93]:24640 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932944AbbIVPye (ORCPT ); Tue, 22 Sep 2015 11:54:34 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,573,1437462000"; d="scan'208";a="810498837" From: Andy Shevchenko To: Stephen Boyd , linux-kernel@vger.kernel.org, heikki.krogerus@linux.intel.com, linux-clk@vger.kernel.org Cc: Andy Shevchenko Subject: [PATCH v6 0/5] clk: fractional-divider: do a clean up and update Date: Tue, 22 Sep 2015 18:54:07 +0300 Message-Id: <1442937252-50281-1-git-send-email-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.5.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The series provides a clean up for clk-fractional-divider together with moving it to use rational best approximation algorithm. I think the patches are self-explanatory. The series was tested with 8250_dw UART driver on Intel Braswell. Patch 5 is an amendment to existing user of the fractional divider outside of clock framework. Changelog v6: - rebase on top of latest clk-next branch - add ACKs from Heikki Changelog v5: - drop patch 1 (there is another fix already in upstream) - add tags (Ack, Review) Changelog v4: - remove dependency to clk_div_mask() and use GENMASK() instead - apply changes to rockchip - amend 8250_dw driver to use proposed changes Changelog v3: - add patch 2/3 to simplify further usage - don't use mult_frac() due to potential overflow on 32 bit kernels - guarantee in ->round_rate() that m and n will not overflow Changelog v2: - move to rational_best_approximation() and mult_frac() - add patch 2/2 Andy Shevchenko (5): clk: fractional-divider: rename prate -> parent_rate clk: fractional-divider: keep mwidth and nwidth internally clk: rockchip: save width in struct clk_fractional_divider clk: fractional-divider: switch to rational best approximation serial: 8250_dw: allow lower reference frequencies drivers/clk/Kconfig | 1 + drivers/clk/clk-fractional-divider.c | 53 ++++++++++++++++++++++-------------- drivers/clk/rockchip/clk.c | 6 ++-- drivers/tty/serial/8250/8250_dw.c | 4 --- include/linux/clk-provider.h | 3 +- 5 files changed, 40 insertions(+), 27 deletions(-) -- 2.5.1